diff --git a/.gitignore b/.gitignore
index 5634632fa4..1998a6c5b8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -36,6 +36,7 @@ src/xml-fortran/xmlreader
 
 # Test results error file
 results_error.dat
+inputs_error.dat
 
 # Test build files
 tests/build/
@@ -62,4 +63,4 @@ data/nndc
 .idea/*
 
 # IPython notebook checkpoints
-.ipynb_checkpoints
\ No newline at end of file
+.ipynb_checkpoints
diff --git a/openmc/clean_xml.py b/openmc/clean_xml.py
index 2bb3f39f1b..aefd30ac7b 100644
--- a/openmc/clean_xml.py
+++ b/openmc/clean_xml.py
@@ -29,7 +29,7 @@ def sort_xml_elements(tree):
             comment_elements.append((element, next_element))
 
     # Now iterate over all tags and order the elements within each tag
-    for tag in tags:
+    for tag in sorted(list(tags)):
 
         # Retrieve all of the elements for this tag
         try:
diff --git a/openmc/material.py b/openmc/material.py
index 4f60abc676..3ca8f24130 100644
--- a/openmc/material.py
+++ b/openmc/material.py
@@ -1,4 +1,4 @@
-from collections import Iterable
+from collections import Iterable, OrderedDict
 from copy import deepcopy
 from numbers import Real, Integral
 import warnings
@@ -64,15 +64,15 @@ class Material(object):
         self._density = None
         self._density_units = ''
 
-        # A dictionary of Nuclides
+        # An ordered dictionary of Nuclides (order affects OpenMC results)
         # Keys         - Nuclide names
         # Values     - tuple (nuclide, percent, percent type)
-        self._nuclides = {}
+        self._nuclides = OrderedDict()
 
-        # A dictionary of Elements
+        # An ordered dictionary of Elements (order affects OpenMC results)
         # Keys         - Element names
         # Values     - tuple (element, percent, percent type)
-        self._elements = {}
+        self._elements = OrderedDict()
 
         # If specified, a list of tuples of (table name, xs identifier)
         self._sab = []
diff --git a/openmc/temp.py b/openmc/temp.py
deleted file mode 100644
index 91f6082996..0000000000
--- a/openmc/temp.py
+++ /dev/null
@@ -1,12 +0,0 @@
-from checkvalue import *
-from checkvalue import _isinstance
-
-import numpy as np
-
-zs = np.zeros((2,))
-
-print _isinstance(zs[0], Integral)
-print _isinstance(zs[0], Real)
-print _isinstance(zs[0], (Integral, Real))
-
-print check_iterable_type('thing', zs, (Real, Integral))
diff --git a/tests/input_set.py b/tests/input_set.py
new file mode 100644
index 0000000000..0af9345d9a
--- /dev/null
+++ b/tests/input_set.py
@@ -0,0 +1,609 @@
+import openmc
+
+
+class InputSet(object):
+    def __init__(self):
+        self.settings = openmc.SettingsFile()
+        self.materials = openmc.MaterialsFile()
+        self.geometry = openmc.GeometryFile()
+        self.tallies = None
+        self.plots = None
+
+    def export(self):
+        self.settings.export_to_xml()
+        self.materials.export_to_xml()
+        self.geometry.export_to_xml()
+        if self.tallies is not None: self.tallies.export_to_xml()
+        if self.plots is not None: self.plots.export_to_xml()
+
+    def build_default_materials_and_geometry(self):
+        # Define materials.
+        fuel = openmc.Material(name='Fuel', material_id=1)
+        fuel.set_density('g/cm3', 10.062)
+        fuel.add_nuclide("U-234", 4.9476e-6)
+        fuel.add_nuclide("U-235", 4.8218e-4)
+        fuel.add_nuclide("U-236", 9.0402e-5)
+        fuel.add_nuclide("U-238", 2.1504e-2)
+        fuel.add_nuclide("Np-237", 7.3733e-6)
+        fuel.add_nuclide("Pu-238", 1.5148e-6)
+        fuel.add_nuclide("Pu-239", 1.3955e-4)
+        fuel.add_nuclide("Pu-240", 3.4405e-5)
+        fuel.add_nuclide("Pu-241", 2.1439e-5)
+        fuel.add_nuclide("Pu-242", 3.7422e-6)
+        fuel.add_nuclide("Am-241", 4.5041e-7)
+        fuel.add_nuclide("Am-242m", 9.2301e-9)
+        fuel.add_nuclide("Am-243", 4.7878e-7)
+        fuel.add_nuclide("Cm-242", 1.0485e-7)
+        fuel.add_nuclide("Cm-243", 1.4268e-9)
+        fuel.add_nuclide("Cm-244", 8.8756e-8)
+        fuel.add_nuclide("Cm-245", 3.5285e-9)
+        fuel.add_nuclide("Mo-95", 2.6497e-5)
+        fuel.add_nuclide("Tc-99", 3.2772e-5)
+        fuel.add_nuclide("Ru-101", 3.0742e-5)
+        fuel.add_nuclide("Ru-103", 2.3505e-6)
+        fuel.add_nuclide("Ag-109", 2.0009e-6)
+        fuel.add_nuclide("Xe-135", 1.0801e-8)
+        fuel.add_nuclide("Cs-133", 3.4612e-5)
+        fuel.add_nuclide("Nd-143", 2.6078e-5)
+        fuel.add_nuclide("Nd-145", 1.9898e-5)
+        fuel.add_nuclide("Sm-147", 1.6128e-6)
+        fuel.add_nuclide("Sm-149", 1.1627e-7)
+        fuel.add_nuclide("Sm-150", 7.1727e-6)
+        fuel.add_nuclide("Sm-151", 5.4947e-7)
+        fuel.add_nuclide("Sm-152", 3.0221e-6)
+        fuel.add_nuclide("Eu-153", 2.6209e-6)
+        fuel.add_nuclide("Gd-155", 1.5369e-9)
+        fuel.add_nuclide("O-16", 4.5737e-2)
+
+        clad = openmc.Material(name='Cladding', material_id=2)
+        clad.set_density('g/cm3', 5.77)
+        clad.add_nuclide("Zr-90", 0.5145)
+        clad.add_nuclide("Zr-91", 0.1122)
+        clad.add_nuclide("Zr-92", 0.1715)
+        clad.add_nuclide("Zr-94", 0.1738)
+        clad.add_nuclide("Zr-96", 0.0280)
+
+        cold_water = openmc.Material(name='Cold borated water', material_id=3)
+        cold_water.set_density('atom/b-cm', 0.07416)
+        cold_water.add_nuclide("H-1", 2.0)
+        cold_water.add_nuclide("O-16", 1.0)
+        cold_water.add_nuclide("B-10", 6.490e-4)
+        cold_water.add_nuclide("B-11", 2.689e-3)
+        cold_water.add_s_alpha_beta('HH2O', '71t')
+
+        hot_water = openmc.Material(name='Hot borated water', material_id=4)
+        hot_water.set_density('atom/b-cm', 0.06614)
+        hot_water.add_nuclide("H-1", 2.0)
+        hot_water.add_nuclide("O-16", 1.0)
+        hot_water.add_nuclide("B-10", 6.490e-4)
+        hot_water.add_nuclide("B-11", 2.689e-3)
+        hot_water.add_s_alpha_beta('HH2O', '71t')
+
+        rpv_steel = openmc.Material(name='Reactor pressure vessel steel',
+             material_id=5)
+        rpv_steel.set_density('g/cm3', 7.9)
+        rpv_steel.add_nuclide("Fe-54", 0.05437098, 'wo')
+        rpv_steel.add_nuclide("Fe-56", 0.88500663, 'wo')
+        rpv_steel.add_nuclide("Fe-57", 0.0208008, 'wo')
+        rpv_steel.add_nuclide("Fe-58", 0.00282159, 'wo')
+        rpv_steel.add_nuclide("Ni-58", 0.0067198, 'wo')
+        rpv_steel.add_nuclide("Ni-60", 0.0026776, 'wo')
+        rpv_steel.add_nuclide("Ni-61", 0.0001183, 'wo')
+        rpv_steel.add_nuclide("Ni-62", 0.0003835, 'wo')
+        rpv_steel.add_nuclide("Ni-64", 0.0001008, 'wo')
+        rpv_steel.add_nuclide("Mn-55", 0.01, 'wo')
+        rpv_steel.add_nuclide("Mo-92", 0.000849, 'wo')
+        rpv_steel.add_nuclide("Mo-94", 0.0005418, 'wo')
+        rpv_steel.add_nuclide("Mo-95", 0.0009438, 'wo')
+        rpv_steel.add_nuclide("Mo-96", 0.0010002, 'wo')
+        rpv_steel.add_nuclide("Mo-97", 0.0005796, 'wo')
+        rpv_steel.add_nuclide("Mo-98", 0.0014814, 'wo')
+        rpv_steel.add_nuclide("Mo-100", 0.0006042, 'wo')
+        rpv_steel.add_nuclide("Si-28", 0.00367464, 'wo')
+        rpv_steel.add_nuclide("Si-29", 0.00019336, 'wo')
+        rpv_steel.add_nuclide("Si-30", 0.000132, 'wo')
+        rpv_steel.add_nuclide("Cr-50", 0.00010435, 'wo')
+        rpv_steel.add_nuclide("Cr-52", 0.002092475, 'wo')
+        rpv_steel.add_nuclide("Cr-53", 0.00024185, 'wo')
+        rpv_steel.add_nuclide("Cr-54", 6.1325e-05, 'wo')
+        rpv_steel.add_nuclide("C-Nat", 0.0025, 'wo')
+        rpv_steel.add_nuclide("Cu-63", 0.0013696, 'wo')
+        rpv_steel.add_nuclide("Cu-65", 0.0006304, 'wo')
+
+        lower_rad_ref = openmc.Material(name='Lower radial reflector',
+             material_id=6)
+        lower_rad_ref.set_density('g/cm3', 4.32)
+        lower_rad_ref.add_nuclide("H-1", 0.0095661, 'wo')
+        lower_rad_ref.add_nuclide("O-16", 0.0759107, 'wo')
+        lower_rad_ref.add_nuclide("B-10", 3.08409e-5, 'wo')
+        lower_rad_ref.add_nuclide("B-11", 1.40499e-4, 'wo')
+        lower_rad_ref.add_nuclide("Fe-54", 0.035620772088, 'wo')
+        lower_rad_ref.add_nuclide("Fe-56", 0.579805982228, 'wo')
+        lower_rad_ref.add_nuclide("Fe-57", 0.01362750048, 'wo')
+        lower_rad_ref.add_nuclide("Fe-58", 0.001848545204, 'wo')
+        lower_rad_ref.add_nuclide("Ni-58", 0.055298376566, 'wo')
+        lower_rad_ref.add_nuclide("Ni-60", 0.022034425592, 'wo')
+        lower_rad_ref.add_nuclide("Ni-61", 0.000973510811, 'wo')
+        lower_rad_ref.add_nuclide("Ni-62", 0.003155886695, 'wo')
+        lower_rad_ref.add_nuclide("Ni-64", 0.000829500336, 'wo')
+        lower_rad_ref.add_nuclide("Mn-55", 0.0182870, 'wo')
+        lower_rad_ref.add_nuclide("Si-28", 0.00839976771, 'wo')
+        lower_rad_ref.add_nuclide("Si-29", 0.00044199679, 'wo')
+        lower_rad_ref.add_nuclide("Si-30", 0.0003017355, 'wo')
+        lower_rad_ref.add_nuclide("Cr-50", 0.007251360806, 'wo')
+        lower_rad_ref.add_nuclide("Cr-52", 0.145407678031, 'wo')
+        lower_rad_ref.add_nuclide("Cr-53", 0.016806340306, 'wo')
+        lower_rad_ref.add_nuclide("Cr-54", 0.004261520857, 'wo')
+        lower_rad_ref.add_s_alpha_beta('HH2O', '71t')
+
+        upper_rad_ref = openmc.Material(name='Upper radial reflector /'
+                                             'Top plate region', material_id=7)
+        upper_rad_ref.set_density('g/cm3', 4.28)
+        upper_rad_ref.add_nuclide("H-1", 0.0086117, 'wo')
+        upper_rad_ref.add_nuclide("O-16", 0.0683369, 'wo')
+        upper_rad_ref.add_nuclide("B-10", 2.77638e-5, 'wo')
+        upper_rad_ref.add_nuclide("B-11", 1.26481e-4, 'wo')
+        upper_rad_ref.add_nuclide("Fe-54", 0.035953677186, 'wo')
+        upper_rad_ref.add_nuclide("Fe-56", 0.585224740891, 'wo')
+        upper_rad_ref.add_nuclide("Fe-57", 0.01375486056, 'wo')
+        upper_rad_ref.add_nuclide("Fe-58", 0.001865821363, 'wo')
+        upper_rad_ref.add_nuclide("Ni-58", 0.055815129186, 'wo')
+        upper_rad_ref.add_nuclide("Ni-60", 0.022240333032, 'wo')
+        upper_rad_ref.add_nuclide("Ni-61", 0.000982608081, 'wo')
+        upper_rad_ref.add_nuclide("Ni-62", 0.003185377845, 'wo')
+        upper_rad_ref.add_nuclide("Ni-64", 0.000837251856, 'wo')
+        upper_rad_ref.add_nuclide("Mn-55", 0.0184579, 'wo')
+        upper_rad_ref.add_nuclide("Si-28", 0.00847831314, 'wo')
+        upper_rad_ref.add_nuclide("Si-29", 0.00044612986, 'wo')
+        upper_rad_ref.add_nuclide("Si-30", 0.000304557, 'wo')
+        upper_rad_ref.add_nuclide("Cr-50", 0.00731912987, 'wo')
+        upper_rad_ref.add_nuclide("Cr-52", 0.146766614995, 'wo')
+        upper_rad_ref.add_nuclide("Cr-53", 0.01696340737, 'wo')
+        upper_rad_ref.add_nuclide("Cr-54", 0.004301347765, 'wo')
+        upper_rad_ref.add_s_alpha_beta('HH2O', '71t')
+
+        bot_plate = openmc.Material(name='Bottom plate region', material_id=8)
+        bot_plate.set_density('g/cm3', 7.184)
+        bot_plate.add_nuclide("H-1", 0.0011505, 'wo')
+        bot_plate.add_nuclide("O-16", 0.0091296, 'wo')
+        bot_plate.add_nuclide("B-10", 3.70915e-6, 'wo')
+        bot_plate.add_nuclide("B-11", 1.68974e-5, 'wo')
+        bot_plate.add_nuclide("Fe-54", 0.03855611055, 'wo')
+        bot_plate.add_nuclide("Fe-56", 0.627585036425, 'wo')
+        bot_plate.add_nuclide("Fe-57", 0.014750478, 'wo')
+        bot_plate.add_nuclide("Fe-58", 0.002000875025, 'wo')
+        bot_plate.add_nuclide("Ni-58", 0.059855207342, 'wo')
+        bot_plate.add_nuclide("Ni-60", 0.023850159704, 'wo')
+        bot_plate.add_nuclide("Ni-61", 0.001053732407, 'wo')
+        bot_plate.add_nuclide("Ni-62", 0.003415945715, 'wo')
+        bot_plate.add_nuclide("Ni-64", 0.000897854832, 'wo')
+        bot_plate.add_nuclide("Mn-55", 0.0197940, 'wo')
+        bot_plate.add_nuclide("Si-28", 0.00909197802, 'wo')
+        bot_plate.add_nuclide("Si-29", 0.00047842098, 'wo')
+        bot_plate.add_nuclide("Si-30", 0.000326601, 'wo')
+        bot_plate.add_nuclide("Cr-50", 0.007848910646, 'wo')
+        bot_plate.add_nuclide("Cr-52", 0.157390026871, 'wo')
+        bot_plate.add_nuclide("Cr-53", 0.018191270146, 'wo')
+        bot_plate.add_nuclide("Cr-54", 0.004612692337, 'wo')
+        bot_plate.add_s_alpha_beta('HH2O', '71t')
+
+        bot_nozzle = openmc.Material(name='Bottom nozzle region', material_id=9)
+        bot_nozzle.set_density('g/cm3', 2.53)
+        bot_nozzle.add_nuclide("H-1", 0.0245014, 'wo')
+        bot_nozzle.add_nuclide("O-16", 0.1944274, 'wo')
+        bot_nozzle.add_nuclide("B-10", 7.89917e-5, 'wo')
+        bot_nozzle.add_nuclide("B-11", 3.59854e-4, 'wo')
+        bot_nozzle.add_nuclide("Fe-54", 0.030411411144, 'wo')
+        bot_nozzle.add_nuclide("Fe-56", 0.495012237964, 'wo')
+        bot_nozzle.add_nuclide("Fe-57", 0.01163454624, 'wo')
+        bot_nozzle.add_nuclide("Fe-58", 0.001578204652, 'wo')
+        bot_nozzle.add_nuclide("Ni-58", 0.047211231662, 'wo')
+        bot_nozzle.add_nuclide("Ni-60", 0.018811987544, 'wo')
+        bot_nozzle.add_nuclide("Ni-61", 0.000831139127, 'wo')
+        bot_nozzle.add_nuclide("Ni-62", 0.002694352115, 'wo')
+        bot_nozzle.add_nuclide("Ni-64", 0.000708189552, 'wo')
+        bot_nozzle.add_nuclide("Mn-55", 0.0156126, 'wo')
+        bot_nozzle.add_nuclide("Si-28", 0.007171335558, 'wo')
+        bot_nozzle.add_nuclide("Si-29", 0.000377356542, 'wo')
+        bot_nozzle.add_nuclide("Si-30", 0.0002576079, 'wo')
+        bot_nozzle.add_nuclide("Cr-50", 0.006190885148, 'wo')
+        bot_nozzle.add_nuclide("Cr-52", 0.124142524198, 'wo')
+        bot_nozzle.add_nuclide("Cr-53", 0.014348496148, 'wo')
+        bot_nozzle.add_nuclide("Cr-54", 0.003638294506, 'wo')
+        bot_nozzle.add_s_alpha_beta('HH2O', '71t')
+
+        top_nozzle = openmc.Material(name='Top nozzle region', material_id=10)
+        top_nozzle.set_density('g/cm3', 1.746)
+        top_nozzle.add_nuclide("H-1", 0.0358870, 'wo')
+        top_nozzle.add_nuclide("O-16", 0.2847761, 'wo')
+        top_nozzle.add_nuclide("B-10", 1.15699e-4, 'wo')
+        top_nozzle.add_nuclide("B-11", 5.27075e-4, 'wo')
+        top_nozzle.add_nuclide("Fe-54", 0.02644016154, 'wo')
+        top_nozzle.add_nuclide("Fe-56", 0.43037146399, 'wo')
+        top_nozzle.add_nuclide("Fe-57", 0.0101152584, 'wo')
+        top_nozzle.add_nuclide("Fe-58", 0.00137211607, 'wo')
+        top_nozzle.add_nuclide("Ni-58", 0.04104621835, 'wo')
+        top_nozzle.add_nuclide("Ni-60", 0.0163554502, 'wo')
+        top_nozzle.add_nuclide("Ni-61", 0.000722605975, 'wo')
+        top_nozzle.add_nuclide("Ni-62", 0.002342513875, 'wo')
+        top_nozzle.add_nuclide("Ni-64", 0.0006157116, 'wo')
+        top_nozzle.add_nuclide("Mn-55", 0.0135739, 'wo')
+        top_nozzle.add_nuclide("Si-28", 0.006234853554, 'wo')
+        top_nozzle.add_nuclide("Si-29", 0.000328078746, 'wo')
+        top_nozzle.add_nuclide("Si-30", 0.0002239677, 'wo')
+        top_nozzle.add_nuclide("Cr-50", 0.005382452306, 'wo')
+        top_nozzle.add_nuclide("Cr-52", 0.107931450781, 'wo')
+        top_nozzle.add_nuclide("Cr-53", 0.012474806806, 'wo')
+        top_nozzle.add_nuclide("Cr-54", 0.003163190107, 'wo')
+        top_nozzle.add_s_alpha_beta('HH2O', '71t')
+
+        top_fa = openmc.Material(name='Top of fuel assemblies', material_id=11)
+        top_fa.set_density('g/cm3', 3.044)
+        top_fa.add_nuclide("H-1", 0.0162913, 'wo')
+        top_fa.add_nuclide("O-16", 0.1292776, 'wo')
+        top_fa.add_nuclide("B-10", 5.25228e-5, 'wo')
+        top_fa.add_nuclide("B-11", 2.39272e-4, 'wo')
+        top_fa.add_nuclide("Zr-90", 0.43313403903, 'wo')
+        top_fa.add_nuclide("Zr-91", 0.09549277374, 'wo')
+        top_fa.add_nuclide("Zr-92", 0.14759527104, 'wo')
+        top_fa.add_nuclide("Zr-94", 0.15280552077, 'wo')
+        top_fa.add_nuclide("Zr-96", 0.02511169542, 'wo')
+        top_fa.add_s_alpha_beta('HH2O', '71t')
+
+        bot_fa = openmc.Material(name='Bottom of fuel assemblies', material_id=12)
+        bot_fa.set_density('g/cm3', 1.762)
+        bot_fa.add_nuclide("H-1", 0.0292856, 'wo')
+        bot_fa.add_nuclide("O-16", 0.2323919, 'wo')
+        bot_fa.add_nuclide("B-10", 9.44159e-5, 'wo')
+        bot_fa.add_nuclide("B-11", 4.30120e-4, 'wo')
+        bot_fa.add_nuclide("Zr-90", 0.3741373658, 'wo')
+        bot_fa.add_nuclide("Zr-91", 0.0824858164, 'wo')
+        bot_fa.add_nuclide("Zr-92", 0.1274914944, 'wo')
+        bot_fa.add_nuclide("Zr-94", 0.1319920622, 'wo')
+        bot_fa.add_nuclide("Zr-96", 0.0216912612, 'wo')
+        bot_fa.add_s_alpha_beta('HH2O', '71t')
+
+        # Define the materials file.
+        self.materials.default_xs = '71c'
+        self.materials.add_materials((fuel, clad, cold_water, hot_water,
+             rpv_steel, lower_rad_ref, upper_rad_ref, bot_plate, bot_nozzle,
+             top_nozzle, top_fa, bot_fa))
+
+        # Define surfaces.
+        s1 = openmc.ZCylinder(R=0.41, surface_id=1)
+        s2 = openmc.ZCylinder(R=0.475, surface_id=2)
+        s3 = openmc.ZCylinder(R=0.56, surface_id=3)
+        s4 = openmc.ZCylinder(R=0.62, surface_id=4)
+        s5 = openmc.ZCylinder(R=187.6, surface_id=5)
+        s6 = openmc.ZCylinder(R=209.0, surface_id=6)
+        s7 = openmc.ZCylinder(R=229.0, surface_id=7)
+        s8 = openmc.ZCylinder(R=249.0, surface_id=8)
+        s8.boundary_type = 'vacuum'
+
+        s31 = openmc.ZPlane(z0=-229.0, surface_id=31)
+        s31.boundary_type = 'vacuum'
+        s32 = openmc.ZPlane(z0=-199.0, surface_id=32)
+        s33 = openmc.ZPlane(z0=-193.0, surface_id=33)
+        s34 = openmc.ZPlane(z0=-183.0, surface_id=34)
+        s35 = openmc.ZPlane(z0=0.0, surface_id=35)
+        s36 = openmc.ZPlane(z0=183.0, surface_id=36)
+        s37 = openmc.ZPlane(z0=203.0, surface_id=37)
+        s38 = openmc.ZPlane(z0=215.0, surface_id=38)
+        s39 = openmc.ZPlane(z0=223.0, surface_id=39)
+        s39.boundary_type = 'vacuum'
+
+        # Define pin cells.
+        fuel_cold = openmc.Universe(name='Fuel pin, cladding, cold water',
+                                    universe_id=1)
+        c21 = openmc.Cell(cell_id=21)
+        c21.add_surface(s1, -1)
+        c21.fill = fuel
+        c22 = openmc.Cell(cell_id=22)
+        c22.add_surface(s1, +1)
+        c22.add_surface(s2, -1)
+        c22.fill = clad
+        c23 = openmc.Cell(cell_id=23)
+        c23.add_surface(s2, +1)
+        c23.fill = cold_water
+        fuel_cold.add_cells((c21, c22, c23))
+
+        tube_cold = openmc.Universe(name='Instrumentation guide tube, '
+                                    'cold water', universe_id=2)
+        c24 = openmc.Cell(cell_id=24)
+        c24.add_surface(s3, -1)
+        c24.fill = cold_water
+        c25 = openmc.Cell(cell_id=25)
+        c25.add_surface(s3, +1)
+        c25.add_surface(s4, -1)
+        c25.fill = clad
+        c26 = openmc.Cell(cell_id=26)
+        c26.add_surface(s4, +1)
+        c26.fill = cold_water
+        tube_cold.add_cells((c24, c25, c26))
+
+        fuel_hot = openmc.Universe(name='Fuel pin, cladding, hot water',
+                                   universe_id=3)
+        c27 = openmc.Cell(cell_id=27)
+        c27.add_surface(s1, -1)
+        c27.fill = fuel
+        c28 = openmc.Cell(cell_id=28)
+        c28.add_surface(s1, +1)
+        c28.add_surface(s2, -1)
+        c28.fill = clad
+        c29 = openmc.Cell(cell_id=29)
+        c29.add_surface(s2, +1)
+        c29.fill = hot_water
+        fuel_hot.add_cells((c27, c28, c29))
+
+        tube_hot = openmc.Universe(name='Instrumentation guide tube, hot water',
+                                   universe_id=4)
+        c30 = openmc.Cell(cell_id=30)
+        c30.add_surface(s3, -1)
+        c30.fill = hot_water
+        c31 = openmc.Cell(cell_id=31)
+        c31.add_surface(s3, +1)
+        c31.add_surface(s4, -1)
+        c31.fill = clad
+        c32 = openmc.Cell(cell_id=32)
+        c32.add_surface(s4, +1)
+        c32.fill = hot_water
+        tube_hot.add_cells((c30, c31, c32))
+
+        # Define fuel lattices.
+        l100 = openmc.RectLattice(name='Fuel assembly (lower half)',
+                                  lattice_id=100)
+        l100.dimension = (17, 17)
+        l100.lower_left = (-10.71, -10.71)
+        l100.pitch = (1.26, 1.26)
+        l100.universes = [
+             [fuel_cold]*17,
+             [fuel_cold]*17,
+             [fuel_cold]*5 + [tube_cold] + [fuel_cold]*2 + [tube_cold]
+                + [fuel_cold]*2 + [tube_cold] + [fuel_cold]*5,
+             [fuel_cold]*3 + [tube_cold] + [fuel_cold]*9 + [tube_cold]
+                + [fuel_cold]*3,
+             [fuel_cold]*17,
+             [fuel_cold]*2 + [tube_cold] + [fuel_cold]*2 + [tube_cold]
+                + [fuel_cold]*2 + [tube_cold] + [fuel_cold]*2 + [tube_cold]
+                + [fuel_cold]*2 + [tube_cold] + [fuel_cold]*2,
+             [fuel_cold]*17,
+             [fuel_cold]*17,
+             [fuel_cold]*2 + [tube_cold] + [fuel_cold]*2 + [tube_cold]
+                + [fuel_cold]*2 + [tube_cold] + [fuel_cold]*2 + [tube_cold]
+                + [fuel_cold]*2 + [tube_cold] + [fuel_cold]*2,
+             [fuel_cold]*17,
+             [fuel_cold]*17,
+             [fuel_cold]*2 + [tube_cold] + [fuel_cold]*2 + [tube_cold]
+                + [fuel_cold]*2 + [tube_cold] + [fuel_cold]*2 + [tube_cold]
+                + [fuel_cold]*2 + [tube_cold] + [fuel_cold]*2,
+             [fuel_cold]*17,
+             [fuel_cold]*3 + [tube_cold] + [fuel_cold]*9 + [tube_cold]
+                + [fuel_cold]*3,
+             [fuel_cold]*5 + [tube_cold] + [fuel_cold]*2 + [tube_cold]
+                + [fuel_cold]*2 + [tube_cold] + [fuel_cold]*5,
+             [fuel_cold]*17,
+             [fuel_cold]*17 ]
+
+        l101 = openmc.RectLattice(name='Fuel assembly (upper half)',
+                                  lattice_id=101)
+        l101.dimension = (17, 17)
+        l101.lower_left = (-10.71, -10.71)
+        l101.pitch = (1.26, 1.26)
+        l101.universes = [
+             [fuel_hot]*17,
+             [fuel_hot]*17,
+             [fuel_hot]*5 + [tube_hot] + [fuel_hot]*2 + [tube_hot]
+                + [fuel_hot]*2 + [tube_hot] + [fuel_hot]*5,
+             [fuel_hot]*3 + [tube_hot] + [fuel_hot]*9 + [tube_hot]
+                + [fuel_hot]*3,
+             [fuel_hot]*17,
+             [fuel_hot]*2 + [tube_hot] + [fuel_hot]*2 + [tube_hot]
+                + [fuel_hot]*2 + [tube_hot] + [fuel_hot]*2 + [tube_hot]
+                + [fuel_hot]*2 + [tube_hot] + [fuel_hot]*2,
+             [fuel_hot]*17,
+             [fuel_hot]*17,
+             [fuel_hot]*2 + [tube_hot] + [fuel_hot]*2 + [tube_hot]
+                + [fuel_hot]*2 + [tube_hot] + [fuel_hot]*2 + [tube_hot]
+                + [fuel_hot]*2 + [tube_hot] + [fuel_hot]*2,
+             [fuel_hot]*17,
+             [fuel_hot]*17,
+             [fuel_hot]*2 + [tube_hot] + [fuel_hot]*2 + [tube_hot]
+                + [fuel_hot]*2 + [tube_hot] + [fuel_hot]*2 + [tube_hot]
+                + [fuel_hot]*2 + [tube_hot] + [fuel_hot]*2,
+             [fuel_hot]*17,
+             [fuel_hot]*3 + [tube_hot] + [fuel_hot]*9 + [tube_hot]
+                + [fuel_hot]*3,
+             [fuel_hot]*5 + [tube_hot] + [fuel_hot]*2 + [tube_hot]
+                + [fuel_hot]*2 + [tube_hot] + [fuel_hot]*5,
+             [fuel_hot]*17,
+             [fuel_hot]*17 ]
+
+        # Define assemblies.
+        fa_cw = openmc.Universe(name='Water assembly (cold)',
+                                universe_id=5)
+        c50 = openmc.Cell(cell_id=50)
+        c50.add_surface(s34, +1)
+        c50.add_surface(s35, -1)
+        c50.fill = cold_water
+        fa_cw.add_cells((c50, ))
+
+        fa_hw = openmc.Universe(name='Water assembly (hot)',
+                                universe_id=7)
+        c70 = openmc.Cell(cell_id=70)
+        c70.add_surface(s35, +1)
+        c70.add_surface(s36, -1)
+        c70.fill = hot_water
+        fa_hw.add_cells((c70, ))
+
+        fa_cold = openmc.Universe(name='Fuel assembly (cold)', universe_id=6)
+        c60 = openmc.Cell(cell_id=60)
+        c60.add_surface(s34, +1)
+        c60.add_surface(s35, -1)
+        c60.fill = l100
+        fa_cold.add_cells((c60, ))
+
+        fa_hot = openmc.Universe(name='Fuel assembly (hot)', universe_id=8)
+        c80 = openmc.Cell(cell_id=80)
+        c80.add_surface(s35, +1)
+        c80.add_surface(s36, -1)
+        c80.fill = l101
+        fa_hot.add_cells((c80, ))
+
+        # Define core lattices
+        l200 = openmc.RectLattice(name='Core lattice (lower half)',
+                                  lattice_id=200)
+        l200.dimension = (21, 21)
+        l200.lower_left = (-224.91, -224.91)
+        l200.pitch = (21.42, 21.42)
+        l200.universes = [
+             [fa_cw]*21,
+             [fa_cw]*21,
+             [fa_cw]*7 + [fa_cold]*7 + [fa_cw]*7,
+             [fa_cw]*5 + [fa_cold]*11 + [fa_cw]*5,
+             [fa_cw]*4 + [fa_cold]*13 + [fa_cw]*4,
+             [fa_cw]*3 + [fa_cold]*15 + [fa_cw]*3,
+             [fa_cw]*3 + [fa_cold]*15 + [fa_cw]*3,
+             [fa_cw]*2 + [fa_cold]*17 + [fa_cw]*2,
+             [fa_cw]*2 + [fa_cold]*17 + [fa_cw]*2,
+             [fa_cw]*2 + [fa_cold]*17 + [fa_cw]*2,
+             [fa_cw]*2 + [fa_cold]*17 + [fa_cw]*2,
+             [fa_cw]*2 + [fa_cold]*17 + [fa_cw]*2,
+             [fa_cw]*2 + [fa_cold]*17 + [fa_cw]*2,
+             [fa_cw]*2 + [fa_cold]*17 + [fa_cw]*2,
+             [fa_cw]*3 + [fa_cold]*15 + [fa_cw]*3,
+             [fa_cw]*3 + [fa_cold]*15 + [fa_cw]*3,
+             [fa_cw]*4 + [fa_cold]*13 + [fa_cw]*4,
+             [fa_cw]*5 + [fa_cold]*11 + [fa_cw]*5,
+             [fa_cw]*7 + [fa_cold]*7 + [fa_cw]*7,
+             [fa_cw]*21,
+             [fa_cw]*21]
+
+        l201 = openmc.RectLattice(name='Core lattice (lower half)',
+                                  lattice_id=201)
+        l201.dimension = (21, 21)
+        l201.lower_left = (-224.91, -224.91)
+        l201.pitch = (21.42, 21.42)
+        l201.universes = [
+             [fa_hw]*21,
+             [fa_hw]*21,
+             [fa_hw]*7 + [fa_hot]*7 + [fa_hw]*7,
+             [fa_hw]*5 + [fa_hot]*11 + [fa_hw]*5,
+             [fa_hw]*4 + [fa_hot]*13 + [fa_hw]*4,
+             [fa_hw]*3 + [fa_hot]*15 + [fa_hw]*3,
+             [fa_hw]*3 + [fa_hot]*15 + [fa_hw]*3,
+             [fa_hw]*2 + [fa_hot]*17 + [fa_hw]*2,
+             [fa_hw]*2 + [fa_hot]*17 + [fa_hw]*2,
+             [fa_hw]*2 + [fa_hot]*17 + [fa_hw]*2,
+             [fa_hw]*2 + [fa_hot]*17 + [fa_hw]*2,
+             [fa_hw]*2 + [fa_hot]*17 + [fa_hw]*2,
+             [fa_hw]*2 + [fa_hot]*17 + [fa_hw]*2,
+             [fa_hw]*2 + [fa_hot]*17 + [fa_hw]*2,
+             [fa_hw]*3 + [fa_hot]*15 + [fa_hw]*3,
+             [fa_hw]*3 + [fa_hot]*15 + [fa_hw]*3,
+             [fa_hw]*4 + [fa_hot]*13 + [fa_hw]*4,
+             [fa_hw]*5 + [fa_hot]*11 + [fa_hw]*5,
+             [fa_hw]*7 + [fa_hot]*7 + [fa_hw]*7,
+             [fa_hw]*21,
+             [fa_hw]*21]
+
+        # Define root universe.
+        root = openmc.Universe(universe_id=0, name='root universe')
+        c1 = openmc.Cell(cell_id=1)
+        c1.add_surface(s6, -1)
+        c1.add_surface(s34, +1)
+        c1.add_surface(s35, -1)
+        c1.fill = l200
+
+        c2 = openmc.Cell(cell_id=2)
+        c2.add_surface(s6, -1)
+        c1.add_surface(s35, +1)
+        c2.add_surface(s36, -1)
+        c2.fill = l201
+
+        c3 = openmc.Cell(cell_id=3)
+        c3.add_surface(s7, -1)
+        c3.add_surface(s31, +1)
+        c3.add_surface(s32, -1)
+        c3.fill = bot_plate
+
+        c4 = openmc.Cell(cell_id=4)
+        c4.add_surface(s5, -1)
+        c4.add_surface(s32, +1)
+        c4.add_surface(s33, -1)
+        c4.fill = bot_nozzle
+
+        c5 = openmc.Cell(cell_id=5)
+        c5.add_surface(s5, -1)
+        c5.add_surface(s33, +1)
+        c5.add_surface(s34, -1)
+        c5.fill = bot_fa
+
+        c6 = openmc.Cell(cell_id=6)
+        c6.add_surface(s5, -1)
+        c6.add_surface(s36, +1)
+        c6.add_surface(s37, -1)
+        c6.fill = top_fa
+
+        c7 = openmc.Cell(cell_id=7)
+        c7.add_surface(s5, -1)
+        c7.add_surface(s37, +1)
+        c7.add_surface(s38, -1)
+        c7.fill = top_nozzle
+
+        c8 = openmc.Cell(cell_id=8)
+        c8.add_surface(s7, -1)
+        c8.add_surface(s38, +1)
+        c8.add_surface(s39, -1)
+        c8.fill = upper_rad_ref
+
+        c9 = openmc.Cell(cell_id=9)
+        c9.add_surface(s6, +1)
+        c9.add_surface(s7, -1)
+        c9.add_surface(s32, +1)
+        c9.add_surface(s38, -1)
+        c9.fill = bot_nozzle
+
+        c10 = openmc.Cell(cell_id=10)
+        c10.add_surface(s7, +1)
+        c10.add_surface(s8, -1)
+        c10.add_surface(s31, +1)
+        c10.add_surface(s39, -1)
+        c10.fill = rpv_steel
+
+        c11 = openmc.Cell(cell_id=11)
+        c11.add_surface(s5, +1)
+        c11.add_surface(s6, -1)
+        c11.add_surface(s32, +1)
+        c11.add_surface(s34, -1)
+        c11.fill = lower_rad_ref
+
+        c12 = openmc.Cell(cell_id=12)
+        c12.add_surface(s5, +1)
+        c12.add_surface(s6, -1)
+        c12.add_surface(s36, +1)
+        c12.add_surface(s38, -1)
+        c12.fill = upper_rad_ref
+
+        root.add_cells((c1, c2, c3, c4, c5, c6, c7, c8, c9, c10, c11, c12))
+
+        # Define the geometry file.
+        geometry = openmc.Geometry()
+        geometry.root_universe = root
+
+        self.geometry.geometry = geometry
+
+    def build_default_settings(self):
+        self.settings.batches = 10
+        self.settings.inactive = 5
+        self.settings.particles = 100
+        self.settings.set_source_space('box', (-160, -160, -183, 160, 160, 183))
+
+    def build_defualt_plots(self):
+        plot = openmc.Plot()
+        plot.filename = 'mat'
+        plot.origin = (125, 125, 0)
+        plot.width = (250, 250)
+        plot.pixels = (3000, 3000)
+        plot.color = 'mat'
+
+        self.plots.add_plot(plot)
diff --git a/tests/run_tests.py b/tests/run_tests.py
index 70ea4c3dc9..338732c142 100755
--- a/tests/run_tests.py
+++ b/tests/run_tests.py
@@ -128,10 +128,8 @@ class Test(object):
         if self.mpi:
             if os.path.exists(os.path.join(MPI_DIR, 'bin', 'mpifort')):
                 self.fc = os.path.join(MPI_DIR, 'bin', 'mpifort')
-            elif os.path.exists(os.path.join(MPI_DIR, 'bin', 'mpif90')):
-                self.fc = os.path.join(MPI_DIR, 'bin', 'mpif90')
             else:
-                raise RuntimeError('Cannot find an MPI Fortran compiler')
+                self.fc = os.path.join(MPI_DIR, 'bin', 'mpif90')
         else:
             self.fc = FC
 
diff --git a/tests/test_basic/test_basic.py b/tests/test_basic/test_basic.py
index 6633e59111..2a595f3e66 100755
--- a/tests/test_basic/test_basic.py
+++ b/tests/test_basic/test_basic.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_cmfd_feed/test_cmfd_feed.py b/tests/test_cmfd_feed/test_cmfd_feed.py
index a3d2f30310..3bc5f61743 100644
--- a/tests/test_cmfd_feed/test_cmfd_feed.py
+++ b/tests/test_cmfd_feed/test_cmfd_feed.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import CMFDTestHarness
 
 
diff --git a/tests/test_cmfd_nofeed/test_cmfd_nofeed.py b/tests/test_cmfd_nofeed/test_cmfd_nofeed.py
index a3d2f30310..3bc5f61743 100644
--- a/tests/test_cmfd_nofeed/test_cmfd_nofeed.py
+++ b/tests/test_cmfd_nofeed/test_cmfd_nofeed.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import CMFDTestHarness
 
 
diff --git a/tests/test_confidence_intervals/test_confidence_intervals.py b/tests/test_confidence_intervals/test_confidence_intervals.py
index 1777db993e..ed6addec45 100755
--- a/tests/test_confidence_intervals/test_confidence_intervals.py
+++ b/tests/test_confidence_intervals/test_confidence_intervals.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_density_atombcm/test_density_atombcm.py b/tests/test_density_atombcm/test_density_atombcm.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_density_atombcm/test_density_atombcm.py
+++ b/tests/test_density_atombcm/test_density_atombcm.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_density_atomcm3/test_density_atomcm3.py b/tests/test_density_atomcm3/test_density_atomcm3.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_density_atomcm3/test_density_atomcm3.py
+++ b/tests/test_density_atomcm3/test_density_atomcm3.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_density_kgm3/test_density_kgm3.py b/tests/test_density_kgm3/test_density_kgm3.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_density_kgm3/test_density_kgm3.py
+++ b/tests/test_density_kgm3/test_density_kgm3.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_density_sum/test_density_sum.py b/tests/test_density_sum/test_density_sum.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_density_sum/test_density_sum.py
+++ b/tests/test_density_sum/test_density_sum.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_eigenvalue_genperbatch/test_eigenvalue_genperbatch.py b/tests/test_eigenvalue_genperbatch/test_eigenvalue_genperbatch.py
index 22752c1894..d6f69fdbb5 100644
--- a/tests/test_eigenvalue_genperbatch/test_eigenvalue_genperbatch.py
+++ b/tests/test_eigenvalue_genperbatch/test_eigenvalue_genperbatch.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_eigenvalue_no_inactive/test_eigenvalue_no_inactive.py b/tests/test_eigenvalue_no_inactive/test_eigenvalue_no_inactive.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_eigenvalue_no_inactive/test_eigenvalue_no_inactive.py
+++ b/tests/test_eigenvalue_no_inactive/test_eigenvalue_no_inactive.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_energy_grid/test_energy_grid.py b/tests/test_energy_grid/test_energy_grid.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_energy_grid/test_energy_grid.py
+++ b/tests/test_energy_grid/test_energy_grid.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_entropy/test_entropy.py b/tests/test_entropy/test_entropy.py
index 43c17da141..113cafcb27 100644
--- a/tests/test_entropy/test_entropy.py
+++ b/tests/test_entropy/test_entropy.py
@@ -3,9 +3,9 @@
 import glob
 import os
 import sys
-
-sys.path.insert(0, '..')
-from testing_harness import *
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness
+from openmc.statepoint import StatePoint
 
 
 class EntropyTestHarness(TestHarness):
diff --git a/tests/test_filter_cell/geometry.xml b/tests/test_filter_cell/geometry.xml
deleted file mode 100644
index f6f067aadd..0000000000
--- a/tests/test_filter_cell/geometry.xml
+++ /dev/null
@@ -1,181 +0,0 @@
-<?xml version="1.0"?>
-<geometry>
-
-  <surface id="1" type="z-cylinder" coeffs="0. 0. 0.41" />
-  <surface id="2" type="z-cylinder" coeffs="0. 0. 0.475" />
-  <surface id="3" type="z-cylinder" coeffs="0. 0. 0.56" />
-  <surface id="4" type="z-cylinder" coeffs="0. 0. 0.62" />
-  <surface id="5" type="z-cylinder" coeffs="0. 0. 187.6" />
-  <surface id="6" type="z-cylinder" coeffs="0. 0. 209.0" />
-  <surface id="7" type="z-cylinder" coeffs="0. 0. 229.0" />
-  <surface id="8" type="z-cylinder" coeffs="0. 0. 249.0" boundary="vacuum" />
-
-  <surface id="31" type="z-plane" coeffs="-229.0" boundary="vacuum" />
-  <surface id="32" type="z-plane" coeffs="-199.0" />
-  <surface id="33" type="z-plane" coeffs="-193.0" />
-  <surface id="34" type="z-plane" coeffs="-183.0" />
-  <surface id="35" type="z-plane" coeffs="0.0" />
-  <surface id="36" type="z-plane" coeffs="183.0" />
-  <surface id="37" type="z-plane" coeffs="203.0" />
-  <surface id="38" type="z-plane" coeffs="215.0" />
-  <surface id="39" type="z-plane" coeffs="223.0" boundary="vacuum" />
-
-  <!-- All geometry on base universe -->
-  <cell id="1"  fill="200"    region="  -6 34 -35" /> <!-- Lower core -->
-  <cell id="2"  fill="201"    region="  -6 35 -36" /> <!-- Upper core -->
-  <cell id="3"  material="8"  region="  -7 31 -32" /> <!-- Lower core plate region -->
-  <cell id="4"  material="9"  region="  -5 32 -33" /> <!-- Bottom nozzle region -->
-  <cell id="5"  material="12" region="  -5 33 -34" /> <!-- Bottom FA region -->
-  <cell id="6"  material="11" region="  -5 36 -37" /> <!-- Top FA region -->
-  <cell id="7"  material="10" region="  -5 37 -38" /> <!-- Top nozzle region -->
-  <cell id="8"  material="7"  region="  -7 38 -39" /> <!-- Upper plate region -->
-  <cell id="9"  material="4"  region="6 -7 32 -38" /> <!-- Downcomer -->
-  <cell id="10" material="5"  region="7 -8 31 -39" /> <!-- RPV -->
-  <cell id="11" material="6"  region="5 -6 32 -34" /> <!-- Bottom of radial reflector -->
-  <cell id="12" material="7"  region="5 -6 36 -38" /> <!-- Top of radial reflector -->
-
-  <!-- Fuel pin, cladding, cold water -->
-  <cell id="21" universe="1" material="1" region="-1"   />
-  <cell id="22" universe="1" material="2" region="1 -2" />
-  <cell id="23" universe="1" material="3" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="24" universe="2" material="3" region="-3"   />
-  <cell id="25" universe="2" material="2" region="3 -4" />
-  <cell id="26" universe="2" material="3" region="4"    />
-
-  <!-- Fuel pin, cladding, hot water -->
-  <cell id="27" universe="3" material="1" region="-1"   />
-  <cell id="28" universe="3" material="2" region="1 -2" />
-  <cell id="29" universe="3" material="4" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="30" universe="4" material="4" region="-3"   />
-  <cell id="31" universe="4" material="2" region="3 -4" />
-  <cell id="32" universe="4" material="4" region="4"    />
-
-  <!-- cell for water assembly (cold) -->
-  <cell id="50" universe="5" material="4" region="34 -35" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="60" universe="6" fill="100"   region="34 -35" />
-
-  <!-- cell for water assembly (hot) -->
-  <cell id="70" universe="7" material="3" region="35 -36" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="80" universe="8" fill="101"   region="35 -36" />
-
-  <!-- Fuel Assembly (Lower Half) -->
-  <lattice id="100">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-    </universes>
-  </lattice>
-
-  <!-- Fuel Assembly (Upper Half) -->
-  <lattice id="101">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Lower Half) -->
-  <lattice id="200">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Upper Half) -->
-  <lattice id="201">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-    </universes>
-  </lattice>
-
-</geometry>
diff --git a/tests/test_filter_cell/inputs_true.dat b/tests/test_filter_cell/inputs_true.dat
new file mode 100644
index 0000000000..7cf1c07c2f
--- /dev/null
+++ b/tests/test_filter_cell/inputs_true.dat
@@ -0,0 +1 @@
+3b06e27fa039762b59076bb9431ef003e69ef32f8d01bcf908fe85f59bf7127bd8b94bf2f895b1b63e9fcdbd97aeaf4b02bc02e7bd029bfd85263c68498ce562
\ No newline at end of file
diff --git a/tests/test_filter_cell/materials.xml b/tests/test_filter_cell/materials.xml
deleted file mode 100644
index 9c0b74f3f1..0000000000
--- a/tests/test_filter_cell/materials.xml
+++ /dev/null
@@ -1,272 +0,0 @@
-<?xml version="1.0"?>
-<materials>
-
-  <default_xs>71c</default_xs>
-
-  <!-- Fuel composition -->
-  <material id="1">
-    <density value="10.062" units="g/cm3" />
-    <nuclide name="U-234"   ao="4.9476e-6" />
-    <nuclide name="U-235"   ao="4.8218e-4" />
-    <nuclide name="U-236"   ao="9.0402e-5" />
-    <nuclide name="U-238"   ao="2.1504e-2" />
-    <nuclide name="Np-237"  ao="7.3733e-6" />
-    <nuclide name="Pu-238"  ao="1.5148e-6" />
-    <nuclide name="Pu-239"  ao="1.3955e-4" />
-    <nuclide name="Pu-240"  ao="3.4405e-5" />
-    <nuclide name="Pu-241"  ao="2.1439e-5" />
-    <nuclide name="Pu-242"  ao="3.7422e-6" />
-    <nuclide name="Am-241"  ao="4.5041e-7" />
-    <nuclide name="Am-242m" ao="9.2301e-9" />
-    <nuclide name="Am-243"  ao="4.7878e-7" />
-    <nuclide name="Cm-242"  ao="1.0485e-7" />
-    <nuclide name="Cm-243"  ao="1.4268e-9" />
-    <nuclide name="Cm-244"  ao="8.8756e-8" />
-    <nuclide name="Cm-245"  ao="3.5285e-9" />
-    <nuclide name="Mo-95"   ao="2.6497e-5" />
-    <nuclide name="Tc-99"   ao="3.2772e-5" />
-    <nuclide name="Ru-101"  ao="3.0742e-5" />
-    <nuclide name="Ru-103"  ao="2.3505e-6" />
-    <nuclide name="Ag-109"  ao="2.0009e-6" />
-    <nuclide name="Xe-135"  ao="1.0801e-8" />
-    <nuclide name="Cs-133"  ao="3.4612e-5" />
-    <nuclide name="Nd-143"  ao="2.6078e-5" />
-    <nuclide name="Nd-145"  ao="1.9898e-5" />
-    <nuclide name="Sm-147"  ao="1.6128e-6" />
-    <nuclide name="Sm-149"  ao="1.1627e-7" />
-    <nuclide name="Sm-150"  ao="7.1727e-6" />
-    <nuclide name="Sm-151"  ao="5.4947e-7" />
-    <nuclide name="Sm-152"  ao="3.0221e-6" />
-    <nuclide name="Eu-153"  ao="2.6209e-6" />
-    <nuclide name="Gd-155"  ao="1.5369e-9" />
-    <nuclide name="O-16"    ao="4.5737e-2" />
-  </material>
-
-  <!-- Cladding composition -->
-  <material id="2">
-    <density value="5.77" units="g/cm3" />
-    <nuclide name="Zr-90" ao="0.5145" />
-    <nuclide name="Zr-91" ao="0.1122" />
-    <nuclide name="Zr-92" ao="0.1715" />
-    <nuclide name="Zr-94" ao="0.1738" />
-    <nuclide name="Zr-96" ao="0.0280" />
-  </material>
-
-  <!-- Cold borated water -->
-  <material id="3">
-    <density value="0.07416" units="atom/b-cm" />
-    <nuclide name="H-1" ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Hot borated water -->
-  <material id="4">
-    <density value="0.06614" units="atom/b-cm" />
-    <nuclide name="H-1"  ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- RPV Composition -->
-  <material id="5">
-    <density value="7.9" units="g/cm3" />
-    <nuclide name="Fe-54"  wo="0.05437098" />
-    <nuclide name="Fe-56"  wo="0.88500663" />
-    <nuclide name="Fe-57"  wo="0.0208008" />
-    <nuclide name="Fe-58"  wo="0.00282159" />
-    <nuclide name="Ni-58"  wo="0.0067198" />
-    <nuclide name="Ni-60"  wo="0.0026776" />
-    <nuclide name="Ni-61"  wo="0.0001183" />
-    <nuclide name="Ni-62"  wo="0.0003835" />
-    <nuclide name="Ni-64"  wo="0.0001008" />
-    <nuclide name="Mn-55"  wo="0.01" />
-    <nuclide name="Mo-92"  wo="0.000849" />
-    <nuclide name="Mo-94"  wo="0.0005418" />
-    <nuclide name="Mo-95"  wo="0.0009438" />
-    <nuclide name="Mo-96"  wo="0.0010002" />
-    <nuclide name="Mo-97"  wo="0.0005796" />
-    <nuclide name="Mo-98"  wo="0.0014814" />
-    <nuclide name="Mo-100" wo="0.0006042" />
-    <nuclide name="Si-28"  wo="0.00367464" />
-    <nuclide name="Si-29"  wo="0.00019336" />
-    <nuclide name="Si-30"  wo="0.000132" />
-    <nuclide name="Cr-50"  wo="0.00010435" />
-    <nuclide name="Cr-52"  wo="0.002092475" />
-    <nuclide name="Cr-53"  wo="0.00024185" />
-    <nuclide name="Cr-54"  wo="6.1325e-05" />
-    <nuclide name="C-Nat"  wo="0.0025" />
-    <nuclide name="Cu-63"  wo="0.0013696" />
-    <nuclide name="Cu-65"  wo="0.0006304" />
-  </material>
-
-  <!-- Lower radial reflector -->
-  <material id="6">
-    <density value="4.32" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0095661" />
-    <nuclide name="O-16"  wo="0.0759107" />
-    <nuclide name="B-10"  wo="3.08409e-5" />
-    <nuclide name="B-11"  wo="1.40499e-4" />
-    <nuclide name="Fe-54" wo="0.035620772088" />
-    <nuclide name="Fe-56" wo="0.579805982228" />
-    <nuclide name="Fe-57" wo="0.01362750048" />
-    <nuclide name="Fe-58" wo="0.001848545204" />
-    <nuclide name="Ni-58" wo="0.055298376566" />
-    <nuclide name="Ni-60" wo="0.022034425592" />
-    <nuclide name="Ni-61" wo="0.000973510811" />
-    <nuclide name="Ni-62" wo="0.003155886695" />
-    <nuclide name="Ni-64" wo="0.000829500336" />
-    <nuclide name="Mn-55" wo="0.0182870" />
-    <nuclide name="Si-28" wo="0.00839976771" />
-    <nuclide name="Si-29" wo="0.00044199679" />
-    <nuclide name="Si-30" wo="0.0003017355" />
-    <nuclide name="Cr-50" wo="0.007251360806" />
-    <nuclide name="Cr-52" wo="0.145407678031" />
-    <nuclide name="Cr-53" wo="0.016806340306" />
-    <nuclide name="Cr-54" wo="0.004261520857" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Upper radial reflector / Top plate region -->
-  <material id="7">
-    <density value="4.28" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0086117" />
-    <nuclide name="O-16"  wo="0.0683369" />
-    <nuclide name="B-10"  wo="2.77638e-5" />
-    <nuclide name="B-11"  wo="1.26481e-4" />
-    <nuclide name="Fe-54" wo="0.035953677186" />
-    <nuclide name="Fe-56" wo="0.585224740891" />
-    <nuclide name="Fe-57" wo="0.01375486056" />
-    <nuclide name="Fe-58" wo="0.001865821363" />
-    <nuclide name="Ni-58" wo="0.055815129186" />
-    <nuclide name="Ni-60" wo="0.022240333032" />
-    <nuclide name="Ni-61" wo="0.000982608081" />
-    <nuclide name="Ni-62" wo="0.003185377845" />
-    <nuclide name="Ni-64" wo="0.000837251856" />
-    <nuclide name="Mn-55" wo="0.0184579" />
-    <nuclide name="Si-28" wo="0.00847831314" />
-    <nuclide name="Si-29" wo="0.00044612986" />
-    <nuclide name="Si-30" wo="0.000304557" />
-    <nuclide name="Cr-50" wo="0.00731912987" />
-    <nuclide name="Cr-52" wo="0.146766614995" />
-    <nuclide name="Cr-53" wo="0.01696340737" />
-    <nuclide name="Cr-54" wo="0.004301347765" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom plate region -->
-  <material id="8">
-    <density value="7.184" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0011505" />
-    <nuclide name="O-16"  wo="0.0091296" />
-    <nuclide name="B-10"  wo="3.70915e-6" />
-    <nuclide name="B-11"  wo="1.68974e-5" />
-    <nuclide name="Fe-54" wo="0.03855611055" />
-    <nuclide name="Fe-56" wo="0.627585036425" />
-    <nuclide name="Fe-57" wo="0.014750478" />
-    <nuclide name="Fe-58" wo="0.002000875025" />
-    <nuclide name="Ni-58" wo="0.059855207342" />
-    <nuclide name="Ni-60" wo="0.023850159704" />
-    <nuclide name="Ni-61" wo="0.001053732407" />
-    <nuclide name="Ni-62" wo="0.003415945715" />
-    <nuclide name="Ni-64" wo="0.000897854832" />
-    <nuclide name="Mn-55" wo="0.0197940" />
-    <nuclide name="Si-28" wo="0.00909197802" />
-    <nuclide name="Si-29" wo="0.00047842098" />
-    <nuclide name="Si-30" wo="0.000326601" />
-    <nuclide name="Cr-50" wo="0.007848910646" />
-    <nuclide name="Cr-52" wo="0.157390026871" />
-    <nuclide name="Cr-53" wo="0.018191270146" />
-    <nuclide name="Cr-54" wo="0.004612692337" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom nozzle region -->
-  <material id="9">
-    <density value="2.53" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0245014" />
-    <nuclide name="O-16"  wo="0.1944274" />
-    <nuclide name="B-10"  wo="7.89917e-5" />
-    <nuclide name="B-11"  wo="3.59854e-4" />
-    <nuclide name="Fe-54" wo="0.030411411144" />
-    <nuclide name="Fe-56" wo="0.495012237964" />
-    <nuclide name="Fe-57" wo="0.01163454624" />
-    <nuclide name="Fe-58" wo="0.001578204652" />
-    <nuclide name="Ni-58" wo="0.047211231662" />
-    <nuclide name="Ni-60" wo="0.018811987544" />
-    <nuclide name="Ni-61" wo="0.000831139127" />
-    <nuclide name="Ni-62" wo="0.002694352115" />
-    <nuclide name="Ni-64" wo="0.000708189552" />
-    <nuclide name="Mn-55" wo="0.0156126" />
-    <nuclide name="Si-28" wo="0.007171335558" />
-    <nuclide name="Si-29" wo="0.000377356542" />
-    <nuclide name="Si-30" wo="0.0002576079" />
-    <nuclide name="Cr-50" wo="0.006190885148" />
-    <nuclide name="Cr-52" wo="0.124142524198" />
-    <nuclide name="Cr-53" wo="0.014348496148" />
-    <nuclide name="Cr-54" wo="0.003638294506" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top nozzle region -->
-  <material id="10">
-    <density value="1.746" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0358870" />
-    <nuclide name="O-16"  wo="0.2847761" />
-    <nuclide name="B-10"  wo="1.15699e-4" />
-    <nuclide name="B-11"  wo="5.27075e-4" />
-    <nuclide name="Fe-54" wo="0.02644016154" />
-    <nuclide name="Fe-56" wo="0.43037146399" />
-    <nuclide name="Fe-57" wo="0.0101152584" />
-    <nuclide name="Fe-58" wo="0.00137211607" />
-    <nuclide name="Ni-58" wo="0.04104621835" />
-    <nuclide name="Ni-60" wo="0.0163554502" />
-    <nuclide name="Ni-61" wo="0.000722605975" />
-    <nuclide name="Ni-62" wo="0.002342513875" />
-    <nuclide name="Ni-64" wo="0.0006157116" />
-    <nuclide name="Mn-55" wo="0.0135739" />
-    <nuclide name="Si-28" wo="0.006234853554" />
-    <nuclide name="Si-29" wo="0.000328078746" />
-    <nuclide name="Si-30" wo="0.0002239677" />
-    <nuclide name="Cr-50" wo="0.005382452306" />
-    <nuclide name="Cr-52" wo="0.107931450781" />
-    <nuclide name="Cr-53" wo="0.012474806806" />
-    <nuclide name="Cr-54" wo="0.003163190107" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top of Fuel Assemblies -->
-  <material id="11">
-    <density value="3.044" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0162913" />
-    <nuclide name="O-16"  wo="0.1292776" />
-    <nuclide name="B-10"  wo="5.25228e-5" />
-    <nuclide name="B-11"  wo="2.39272e-4" />
-    <nuclide name="Zr-90" wo="0.43313403903" />
-    <nuclide name="Zr-91" wo="0.09549277374" />
-    <nuclide name="Zr-92" wo="0.14759527104" />
-    <nuclide name="Zr-94" wo="0.15280552077" />
-    <nuclide name="Zr-96" wo="0.02511169542" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom of Fuel Assemblies -->
-  <material id="12">
-    <density value="1.762" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0292856" />
-    <nuclide name="O-16"  wo="0.2323919" />
-    <nuclide name="B-10"  wo="9.44159e-5" />
-    <nuclide name="B-11"  wo="4.30120e-4" />
-    <nuclide name="Zr-90" wo="0.3741373658" />
-    <nuclide name="Zr-91" wo="0.0824858164" />
-    <nuclide name="Zr-92" wo="0.1274914944" />
-    <nuclide name="Zr-94" wo="0.1319920622" />
-    <nuclide name="Zr-96" wo="0.0216912612" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-</materials>
diff --git a/tests/test_filter_cell/results_true.dat b/tests/test_filter_cell/results_true.dat
index f3aa5d89b1..47ff3c281a 100644
--- a/tests/test_filter_cell/results_true.dat
+++ b/tests/test_filter_cell/results_true.dat
@@ -1,11 +1,11 @@
 k-combined:
-1.005983E+00 2.248579E-02
+9.903196E-01 4.279617E-02
 tally 1:
 0.000000E+00
 0.000000E+00
-1.423676E+01
-4.330937E+01
-2.914798E+00
-1.831649E+00
-4.088282E+01
-3.662539E+02
+1.767552E+01
+6.295417E+01
+3.863588E+00
+3.013300E+00
+5.356594E+01
+5.839391E+02
diff --git a/tests/test_filter_cell/settings.xml b/tests/test_filter_cell/settings.xml
deleted file mode 100644
index 517637a59f..0000000000
--- a/tests/test_filter_cell/settings.xml
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0"?>
-<settings>
-
-  <eigenvalue>
-    <batches>10</batches>
-    <inactive>5</inactive>
-    <particles>100</particles>
-  </eigenvalue>
-
-  <source>
-    <space type="box">
-      <parameters>
-        -160 -160 -183
-         160  160  183
-      </parameters>
-    </space>
-  </source>
-
-</settings>
diff --git a/tests/test_filter_cell/tallies.xml b/tests/test_filter_cell/tallies.xml
deleted file mode 100644
index 815b84c145..0000000000
--- a/tests/test_filter_cell/tallies.xml
+++ /dev/null
@@ -1,9 +0,0 @@
-<?xml version="1.0"?>
-<tallies>
-
-  <tally id="1">
-    <filter type="cell" bins="10 21 22 23" />
-    <scores>total</scores>
-  </tally>
-
-</tallies>
\ No newline at end of file
diff --git a/tests/test_filter_cell/test_filter_cell.py b/tests/test_filter_cell/test_filter_cell.py
index 1777db993e..d532d59cf8 100644
--- a/tests/test_filter_cell/test_filter_cell.py
+++ b/tests/test_filter_cell/test_filter_cell.py
@@ -1,10 +1,29 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
-from testing_harness import TestHarness
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness, PyAPITestHarness
+import openmc
+
+
+class FilterCellTestHarness(PyAPITestHarness):
+    def _build_inputs(self):
+        filt = openmc.Filter(type='cell', bins=(10, 21, 22, 23))
+        tally = openmc.Tally(tally_id=1)
+        tally.add_filter(filt)
+        tally.add_score('total')
+        self._input_set.tallies = openmc.TalliesFile()
+        self._input_set.tallies.add_tally(tally)
+
+        super(FilterCellTestHarness, self)._build_inputs()
+
+    def _cleanup(self):
+        super(FilterCellTestHarness, self)._cleanup()
+        f = os.path.join(os.getcwd(), 'tallies.xml')
+        if os.path.exists(f): os.remove(f)
 
 
 if __name__ == '__main__':
-    harness = TestHarness('statepoint.10.*', True)
+    harness = FilterCellTestHarness('statepoint.10.*', True)
     harness.main()
diff --git a/tests/test_filter_cellborn/geometry.xml b/tests/test_filter_cellborn/geometry.xml
deleted file mode 100644
index f6f067aadd..0000000000
--- a/tests/test_filter_cellborn/geometry.xml
+++ /dev/null
@@ -1,181 +0,0 @@
-<?xml version="1.0"?>
-<geometry>
-
-  <surface id="1" type="z-cylinder" coeffs="0. 0. 0.41" />
-  <surface id="2" type="z-cylinder" coeffs="0. 0. 0.475" />
-  <surface id="3" type="z-cylinder" coeffs="0. 0. 0.56" />
-  <surface id="4" type="z-cylinder" coeffs="0. 0. 0.62" />
-  <surface id="5" type="z-cylinder" coeffs="0. 0. 187.6" />
-  <surface id="6" type="z-cylinder" coeffs="0. 0. 209.0" />
-  <surface id="7" type="z-cylinder" coeffs="0. 0. 229.0" />
-  <surface id="8" type="z-cylinder" coeffs="0. 0. 249.0" boundary="vacuum" />
-
-  <surface id="31" type="z-plane" coeffs="-229.0" boundary="vacuum" />
-  <surface id="32" type="z-plane" coeffs="-199.0" />
-  <surface id="33" type="z-plane" coeffs="-193.0" />
-  <surface id="34" type="z-plane" coeffs="-183.0" />
-  <surface id="35" type="z-plane" coeffs="0.0" />
-  <surface id="36" type="z-plane" coeffs="183.0" />
-  <surface id="37" type="z-plane" coeffs="203.0" />
-  <surface id="38" type="z-plane" coeffs="215.0" />
-  <surface id="39" type="z-plane" coeffs="223.0" boundary="vacuum" />
-
-  <!-- All geometry on base universe -->
-  <cell id="1"  fill="200"    region="  -6 34 -35" /> <!-- Lower core -->
-  <cell id="2"  fill="201"    region="  -6 35 -36" /> <!-- Upper core -->
-  <cell id="3"  material="8"  region="  -7 31 -32" /> <!-- Lower core plate region -->
-  <cell id="4"  material="9"  region="  -5 32 -33" /> <!-- Bottom nozzle region -->
-  <cell id="5"  material="12" region="  -5 33 -34" /> <!-- Bottom FA region -->
-  <cell id="6"  material="11" region="  -5 36 -37" /> <!-- Top FA region -->
-  <cell id="7"  material="10" region="  -5 37 -38" /> <!-- Top nozzle region -->
-  <cell id="8"  material="7"  region="  -7 38 -39" /> <!-- Upper plate region -->
-  <cell id="9"  material="4"  region="6 -7 32 -38" /> <!-- Downcomer -->
-  <cell id="10" material="5"  region="7 -8 31 -39" /> <!-- RPV -->
-  <cell id="11" material="6"  region="5 -6 32 -34" /> <!-- Bottom of radial reflector -->
-  <cell id="12" material="7"  region="5 -6 36 -38" /> <!-- Top of radial reflector -->
-
-  <!-- Fuel pin, cladding, cold water -->
-  <cell id="21" universe="1" material="1" region="-1"   />
-  <cell id="22" universe="1" material="2" region="1 -2" />
-  <cell id="23" universe="1" material="3" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="24" universe="2" material="3" region="-3"   />
-  <cell id="25" universe="2" material="2" region="3 -4" />
-  <cell id="26" universe="2" material="3" region="4"    />
-
-  <!-- Fuel pin, cladding, hot water -->
-  <cell id="27" universe="3" material="1" region="-1"   />
-  <cell id="28" universe="3" material="2" region="1 -2" />
-  <cell id="29" universe="3" material="4" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="30" universe="4" material="4" region="-3"   />
-  <cell id="31" universe="4" material="2" region="3 -4" />
-  <cell id="32" universe="4" material="4" region="4"    />
-
-  <!-- cell for water assembly (cold) -->
-  <cell id="50" universe="5" material="4" region="34 -35" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="60" universe="6" fill="100"   region="34 -35" />
-
-  <!-- cell for water assembly (hot) -->
-  <cell id="70" universe="7" material="3" region="35 -36" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="80" universe="8" fill="101"   region="35 -36" />
-
-  <!-- Fuel Assembly (Lower Half) -->
-  <lattice id="100">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-    </universes>
-  </lattice>
-
-  <!-- Fuel Assembly (Upper Half) -->
-  <lattice id="101">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Lower Half) -->
-  <lattice id="200">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Upper Half) -->
-  <lattice id="201">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-    </universes>
-  </lattice>
-
-</geometry>
diff --git a/tests/test_filter_cellborn/inputs_true.dat b/tests/test_filter_cellborn/inputs_true.dat
new file mode 100644
index 0000000000..3379e4b26a
--- /dev/null
+++ b/tests/test_filter_cellborn/inputs_true.dat
@@ -0,0 +1 @@
+6dd7d019587330bbf9c19bae7ad1d888331858b68bd77218315d5fa7b85df7fb97cb208daed584a780592cf9840e67ea3777ccbde502f3861798aac95722be9c
\ No newline at end of file
diff --git a/tests/test_filter_cellborn/materials.xml b/tests/test_filter_cellborn/materials.xml
deleted file mode 100644
index 9c0b74f3f1..0000000000
--- a/tests/test_filter_cellborn/materials.xml
+++ /dev/null
@@ -1,272 +0,0 @@
-<?xml version="1.0"?>
-<materials>
-
-  <default_xs>71c</default_xs>
-
-  <!-- Fuel composition -->
-  <material id="1">
-    <density value="10.062" units="g/cm3" />
-    <nuclide name="U-234"   ao="4.9476e-6" />
-    <nuclide name="U-235"   ao="4.8218e-4" />
-    <nuclide name="U-236"   ao="9.0402e-5" />
-    <nuclide name="U-238"   ao="2.1504e-2" />
-    <nuclide name="Np-237"  ao="7.3733e-6" />
-    <nuclide name="Pu-238"  ao="1.5148e-6" />
-    <nuclide name="Pu-239"  ao="1.3955e-4" />
-    <nuclide name="Pu-240"  ao="3.4405e-5" />
-    <nuclide name="Pu-241"  ao="2.1439e-5" />
-    <nuclide name="Pu-242"  ao="3.7422e-6" />
-    <nuclide name="Am-241"  ao="4.5041e-7" />
-    <nuclide name="Am-242m" ao="9.2301e-9" />
-    <nuclide name="Am-243"  ao="4.7878e-7" />
-    <nuclide name="Cm-242"  ao="1.0485e-7" />
-    <nuclide name="Cm-243"  ao="1.4268e-9" />
-    <nuclide name="Cm-244"  ao="8.8756e-8" />
-    <nuclide name="Cm-245"  ao="3.5285e-9" />
-    <nuclide name="Mo-95"   ao="2.6497e-5" />
-    <nuclide name="Tc-99"   ao="3.2772e-5" />
-    <nuclide name="Ru-101"  ao="3.0742e-5" />
-    <nuclide name="Ru-103"  ao="2.3505e-6" />
-    <nuclide name="Ag-109"  ao="2.0009e-6" />
-    <nuclide name="Xe-135"  ao="1.0801e-8" />
-    <nuclide name="Cs-133"  ao="3.4612e-5" />
-    <nuclide name="Nd-143"  ao="2.6078e-5" />
-    <nuclide name="Nd-145"  ao="1.9898e-5" />
-    <nuclide name="Sm-147"  ao="1.6128e-6" />
-    <nuclide name="Sm-149"  ao="1.1627e-7" />
-    <nuclide name="Sm-150"  ao="7.1727e-6" />
-    <nuclide name="Sm-151"  ao="5.4947e-7" />
-    <nuclide name="Sm-152"  ao="3.0221e-6" />
-    <nuclide name="Eu-153"  ao="2.6209e-6" />
-    <nuclide name="Gd-155"  ao="1.5369e-9" />
-    <nuclide name="O-16"    ao="4.5737e-2" />
-  </material>
-
-  <!-- Cladding composition -->
-  <material id="2">
-    <density value="5.77" units="g/cm3" />
-    <nuclide name="Zr-90" ao="0.5145" />
-    <nuclide name="Zr-91" ao="0.1122" />
-    <nuclide name="Zr-92" ao="0.1715" />
-    <nuclide name="Zr-94" ao="0.1738" />
-    <nuclide name="Zr-96" ao="0.0280" />
-  </material>
-
-  <!-- Cold borated water -->
-  <material id="3">
-    <density value="0.07416" units="atom/b-cm" />
-    <nuclide name="H-1" ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Hot borated water -->
-  <material id="4">
-    <density value="0.06614" units="atom/b-cm" />
-    <nuclide name="H-1"  ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- RPV Composition -->
-  <material id="5">
-    <density value="7.9" units="g/cm3" />
-    <nuclide name="Fe-54"  wo="0.05437098" />
-    <nuclide name="Fe-56"  wo="0.88500663" />
-    <nuclide name="Fe-57"  wo="0.0208008" />
-    <nuclide name="Fe-58"  wo="0.00282159" />
-    <nuclide name="Ni-58"  wo="0.0067198" />
-    <nuclide name="Ni-60"  wo="0.0026776" />
-    <nuclide name="Ni-61"  wo="0.0001183" />
-    <nuclide name="Ni-62"  wo="0.0003835" />
-    <nuclide name="Ni-64"  wo="0.0001008" />
-    <nuclide name="Mn-55"  wo="0.01" />
-    <nuclide name="Mo-92"  wo="0.000849" />
-    <nuclide name="Mo-94"  wo="0.0005418" />
-    <nuclide name="Mo-95"  wo="0.0009438" />
-    <nuclide name="Mo-96"  wo="0.0010002" />
-    <nuclide name="Mo-97"  wo="0.0005796" />
-    <nuclide name="Mo-98"  wo="0.0014814" />
-    <nuclide name="Mo-100" wo="0.0006042" />
-    <nuclide name="Si-28"  wo="0.00367464" />
-    <nuclide name="Si-29"  wo="0.00019336" />
-    <nuclide name="Si-30"  wo="0.000132" />
-    <nuclide name="Cr-50"  wo="0.00010435" />
-    <nuclide name="Cr-52"  wo="0.002092475" />
-    <nuclide name="Cr-53"  wo="0.00024185" />
-    <nuclide name="Cr-54"  wo="6.1325e-05" />
-    <nuclide name="C-Nat"  wo="0.0025" />
-    <nuclide name="Cu-63"  wo="0.0013696" />
-    <nuclide name="Cu-65"  wo="0.0006304" />
-  </material>
-
-  <!-- Lower radial reflector -->
-  <material id="6">
-    <density value="4.32" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0095661" />
-    <nuclide name="O-16"  wo="0.0759107" />
-    <nuclide name="B-10"  wo="3.08409e-5" />
-    <nuclide name="B-11"  wo="1.40499e-4" />
-    <nuclide name="Fe-54" wo="0.035620772088" />
-    <nuclide name="Fe-56" wo="0.579805982228" />
-    <nuclide name="Fe-57" wo="0.01362750048" />
-    <nuclide name="Fe-58" wo="0.001848545204" />
-    <nuclide name="Ni-58" wo="0.055298376566" />
-    <nuclide name="Ni-60" wo="0.022034425592" />
-    <nuclide name="Ni-61" wo="0.000973510811" />
-    <nuclide name="Ni-62" wo="0.003155886695" />
-    <nuclide name="Ni-64" wo="0.000829500336" />
-    <nuclide name="Mn-55" wo="0.0182870" />
-    <nuclide name="Si-28" wo="0.00839976771" />
-    <nuclide name="Si-29" wo="0.00044199679" />
-    <nuclide name="Si-30" wo="0.0003017355" />
-    <nuclide name="Cr-50" wo="0.007251360806" />
-    <nuclide name="Cr-52" wo="0.145407678031" />
-    <nuclide name="Cr-53" wo="0.016806340306" />
-    <nuclide name="Cr-54" wo="0.004261520857" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Upper radial reflector / Top plate region -->
-  <material id="7">
-    <density value="4.28" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0086117" />
-    <nuclide name="O-16"  wo="0.0683369" />
-    <nuclide name="B-10"  wo="2.77638e-5" />
-    <nuclide name="B-11"  wo="1.26481e-4" />
-    <nuclide name="Fe-54" wo="0.035953677186" />
-    <nuclide name="Fe-56" wo="0.585224740891" />
-    <nuclide name="Fe-57" wo="0.01375486056" />
-    <nuclide name="Fe-58" wo="0.001865821363" />
-    <nuclide name="Ni-58" wo="0.055815129186" />
-    <nuclide name="Ni-60" wo="0.022240333032" />
-    <nuclide name="Ni-61" wo="0.000982608081" />
-    <nuclide name="Ni-62" wo="0.003185377845" />
-    <nuclide name="Ni-64" wo="0.000837251856" />
-    <nuclide name="Mn-55" wo="0.0184579" />
-    <nuclide name="Si-28" wo="0.00847831314" />
-    <nuclide name="Si-29" wo="0.00044612986" />
-    <nuclide name="Si-30" wo="0.000304557" />
-    <nuclide name="Cr-50" wo="0.00731912987" />
-    <nuclide name="Cr-52" wo="0.146766614995" />
-    <nuclide name="Cr-53" wo="0.01696340737" />
-    <nuclide name="Cr-54" wo="0.004301347765" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom plate region -->
-  <material id="8">
-    <density value="7.184" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0011505" />
-    <nuclide name="O-16"  wo="0.0091296" />
-    <nuclide name="B-10"  wo="3.70915e-6" />
-    <nuclide name="B-11"  wo="1.68974e-5" />
-    <nuclide name="Fe-54" wo="0.03855611055" />
-    <nuclide name="Fe-56" wo="0.627585036425" />
-    <nuclide name="Fe-57" wo="0.014750478" />
-    <nuclide name="Fe-58" wo="0.002000875025" />
-    <nuclide name="Ni-58" wo="0.059855207342" />
-    <nuclide name="Ni-60" wo="0.023850159704" />
-    <nuclide name="Ni-61" wo="0.001053732407" />
-    <nuclide name="Ni-62" wo="0.003415945715" />
-    <nuclide name="Ni-64" wo="0.000897854832" />
-    <nuclide name="Mn-55" wo="0.0197940" />
-    <nuclide name="Si-28" wo="0.00909197802" />
-    <nuclide name="Si-29" wo="0.00047842098" />
-    <nuclide name="Si-30" wo="0.000326601" />
-    <nuclide name="Cr-50" wo="0.007848910646" />
-    <nuclide name="Cr-52" wo="0.157390026871" />
-    <nuclide name="Cr-53" wo="0.018191270146" />
-    <nuclide name="Cr-54" wo="0.004612692337" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom nozzle region -->
-  <material id="9">
-    <density value="2.53" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0245014" />
-    <nuclide name="O-16"  wo="0.1944274" />
-    <nuclide name="B-10"  wo="7.89917e-5" />
-    <nuclide name="B-11"  wo="3.59854e-4" />
-    <nuclide name="Fe-54" wo="0.030411411144" />
-    <nuclide name="Fe-56" wo="0.495012237964" />
-    <nuclide name="Fe-57" wo="0.01163454624" />
-    <nuclide name="Fe-58" wo="0.001578204652" />
-    <nuclide name="Ni-58" wo="0.047211231662" />
-    <nuclide name="Ni-60" wo="0.018811987544" />
-    <nuclide name="Ni-61" wo="0.000831139127" />
-    <nuclide name="Ni-62" wo="0.002694352115" />
-    <nuclide name="Ni-64" wo="0.000708189552" />
-    <nuclide name="Mn-55" wo="0.0156126" />
-    <nuclide name="Si-28" wo="0.007171335558" />
-    <nuclide name="Si-29" wo="0.000377356542" />
-    <nuclide name="Si-30" wo="0.0002576079" />
-    <nuclide name="Cr-50" wo="0.006190885148" />
-    <nuclide name="Cr-52" wo="0.124142524198" />
-    <nuclide name="Cr-53" wo="0.014348496148" />
-    <nuclide name="Cr-54" wo="0.003638294506" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top nozzle region -->
-  <material id="10">
-    <density value="1.746" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0358870" />
-    <nuclide name="O-16"  wo="0.2847761" />
-    <nuclide name="B-10"  wo="1.15699e-4" />
-    <nuclide name="B-11"  wo="5.27075e-4" />
-    <nuclide name="Fe-54" wo="0.02644016154" />
-    <nuclide name="Fe-56" wo="0.43037146399" />
-    <nuclide name="Fe-57" wo="0.0101152584" />
-    <nuclide name="Fe-58" wo="0.00137211607" />
-    <nuclide name="Ni-58" wo="0.04104621835" />
-    <nuclide name="Ni-60" wo="0.0163554502" />
-    <nuclide name="Ni-61" wo="0.000722605975" />
-    <nuclide name="Ni-62" wo="0.002342513875" />
-    <nuclide name="Ni-64" wo="0.0006157116" />
-    <nuclide name="Mn-55" wo="0.0135739" />
-    <nuclide name="Si-28" wo="0.006234853554" />
-    <nuclide name="Si-29" wo="0.000328078746" />
-    <nuclide name="Si-30" wo="0.0002239677" />
-    <nuclide name="Cr-50" wo="0.005382452306" />
-    <nuclide name="Cr-52" wo="0.107931450781" />
-    <nuclide name="Cr-53" wo="0.012474806806" />
-    <nuclide name="Cr-54" wo="0.003163190107" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top of Fuel Assemblies -->
-  <material id="11">
-    <density value="3.044" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0162913" />
-    <nuclide name="O-16"  wo="0.1292776" />
-    <nuclide name="B-10"  wo="5.25228e-5" />
-    <nuclide name="B-11"  wo="2.39272e-4" />
-    <nuclide name="Zr-90" wo="0.43313403903" />
-    <nuclide name="Zr-91" wo="0.09549277374" />
-    <nuclide name="Zr-92" wo="0.14759527104" />
-    <nuclide name="Zr-94" wo="0.15280552077" />
-    <nuclide name="Zr-96" wo="0.02511169542" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom of Fuel Assemblies -->
-  <material id="12">
-    <density value="1.762" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0292856" />
-    <nuclide name="O-16"  wo="0.2323919" />
-    <nuclide name="B-10"  wo="9.44159e-5" />
-    <nuclide name="B-11"  wo="4.30120e-4" />
-    <nuclide name="Zr-90" wo="0.3741373658" />
-    <nuclide name="Zr-91" wo="0.0824858164" />
-    <nuclide name="Zr-92" wo="0.1274914944" />
-    <nuclide name="Zr-94" wo="0.1319920622" />
-    <nuclide name="Zr-96" wo="0.0216912612" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-</materials>
diff --git a/tests/test_filter_cellborn/results_true.dat b/tests/test_filter_cellborn/results_true.dat
index 36dcf40d06..d0ab58f4ed 100644
--- a/tests/test_filter_cellborn/results_true.dat
+++ b/tests/test_filter_cellborn/results_true.dat
@@ -1,10 +1,10 @@
 k-combined:
-1.005983E+00 2.248579E-02
+9.903196E-01 4.279617E-02
 tally 1:
 0.000000E+00
 0.000000E+00
-7.007584E+01
-1.050827E+03
+8.921179E+01
+1.601939E+03
 0.000000E+00
 0.000000E+00
 0.000000E+00
diff --git a/tests/test_filter_cellborn/settings.xml b/tests/test_filter_cellborn/settings.xml
deleted file mode 100644
index 517637a59f..0000000000
--- a/tests/test_filter_cellborn/settings.xml
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0"?>
-<settings>
-
-  <eigenvalue>
-    <batches>10</batches>
-    <inactive>5</inactive>
-    <particles>100</particles>
-  </eigenvalue>
-
-  <source>
-    <space type="box">
-      <parameters>
-        -160 -160 -183
-         160  160  183
-      </parameters>
-    </space>
-  </source>
-
-</settings>
diff --git a/tests/test_filter_cellborn/tallies.xml b/tests/test_filter_cellborn/tallies.xml
deleted file mode 100644
index b278b07ff8..0000000000
--- a/tests/test_filter_cellborn/tallies.xml
+++ /dev/null
@@ -1,9 +0,0 @@
-<?xml version="1.0"?>
-<tallies>
-
-  <tally id="1">
-    <filter type="cellborn" bins="10 21 22 23" />
-    <scores>total</scores>
-  </tally>
-
-</tallies>
\ No newline at end of file
diff --git a/tests/test_filter_cellborn/test_filter_cellborn.py b/tests/test_filter_cellborn/test_filter_cellborn.py
index 1777db993e..2fac6a1fcd 100644
--- a/tests/test_filter_cellborn/test_filter_cellborn.py
+++ b/tests/test_filter_cellborn/test_filter_cellborn.py
@@ -1,10 +1,29 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
-from testing_harness import TestHarness
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness, PyAPITestHarness
+import openmc
+
+
+class FilterCellbornTestHarness(PyAPITestHarness):
+    def _build_inputs(self):
+        filt = openmc.Filter(type='cellborn', bins=(10, 21, 22, 23))
+        tally = openmc.Tally(tally_id=1)
+        tally.add_filter(filt)
+        tally.add_score('total')
+        self._input_set.tallies = openmc.TalliesFile()
+        self._input_set.tallies.add_tally(tally)
+
+        super(FilterCellbornTestHarness, self)._build_inputs()
+
+    def _cleanup(self):
+        super(FilterCellbornTestHarness, self)._cleanup()
+        f = os.path.join(os.getcwd(), 'tallies.xml')
+        if os.path.exists(f): os.remove(f)
 
 
 if __name__ == '__main__':
-    harness = TestHarness('statepoint.10.*', True)
+    harness = FilterCellbornTestHarness('statepoint.10.*', True)
     harness.main()
diff --git a/tests/test_filter_distribcell/test_filter_distribcell.py b/tests/test_filter_distribcell/test_filter_distribcell.py
index 541d6b6af1..872d29552b 100644
--- a/tests/test_filter_distribcell/test_filter_distribcell.py
+++ b/tests/test_filter_distribcell/test_filter_distribcell.py
@@ -4,8 +4,7 @@ import glob
 import hashlib
 import os
 import sys
-
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import *
 
 
diff --git a/tests/test_filter_energy/geometry.xml b/tests/test_filter_energy/geometry.xml
deleted file mode 100644
index f6f067aadd..0000000000
--- a/tests/test_filter_energy/geometry.xml
+++ /dev/null
@@ -1,181 +0,0 @@
-<?xml version="1.0"?>
-<geometry>
-
-  <surface id="1" type="z-cylinder" coeffs="0. 0. 0.41" />
-  <surface id="2" type="z-cylinder" coeffs="0. 0. 0.475" />
-  <surface id="3" type="z-cylinder" coeffs="0. 0. 0.56" />
-  <surface id="4" type="z-cylinder" coeffs="0. 0. 0.62" />
-  <surface id="5" type="z-cylinder" coeffs="0. 0. 187.6" />
-  <surface id="6" type="z-cylinder" coeffs="0. 0. 209.0" />
-  <surface id="7" type="z-cylinder" coeffs="0. 0. 229.0" />
-  <surface id="8" type="z-cylinder" coeffs="0. 0. 249.0" boundary="vacuum" />
-
-  <surface id="31" type="z-plane" coeffs="-229.0" boundary="vacuum" />
-  <surface id="32" type="z-plane" coeffs="-199.0" />
-  <surface id="33" type="z-plane" coeffs="-193.0" />
-  <surface id="34" type="z-plane" coeffs="-183.0" />
-  <surface id="35" type="z-plane" coeffs="0.0" />
-  <surface id="36" type="z-plane" coeffs="183.0" />
-  <surface id="37" type="z-plane" coeffs="203.0" />
-  <surface id="38" type="z-plane" coeffs="215.0" />
-  <surface id="39" type="z-plane" coeffs="223.0" boundary="vacuum" />
-
-  <!-- All geometry on base universe -->
-  <cell id="1"  fill="200"    region="  -6 34 -35" /> <!-- Lower core -->
-  <cell id="2"  fill="201"    region="  -6 35 -36" /> <!-- Upper core -->
-  <cell id="3"  material="8"  region="  -7 31 -32" /> <!-- Lower core plate region -->
-  <cell id="4"  material="9"  region="  -5 32 -33" /> <!-- Bottom nozzle region -->
-  <cell id="5"  material="12" region="  -5 33 -34" /> <!-- Bottom FA region -->
-  <cell id="6"  material="11" region="  -5 36 -37" /> <!-- Top FA region -->
-  <cell id="7"  material="10" region="  -5 37 -38" /> <!-- Top nozzle region -->
-  <cell id="8"  material="7"  region="  -7 38 -39" /> <!-- Upper plate region -->
-  <cell id="9"  material="4"  region="6 -7 32 -38" /> <!-- Downcomer -->
-  <cell id="10" material="5"  region="7 -8 31 -39" /> <!-- RPV -->
-  <cell id="11" material="6"  region="5 -6 32 -34" /> <!-- Bottom of radial reflector -->
-  <cell id="12" material="7"  region="5 -6 36 -38" /> <!-- Top of radial reflector -->
-
-  <!-- Fuel pin, cladding, cold water -->
-  <cell id="21" universe="1" material="1" region="-1"   />
-  <cell id="22" universe="1" material="2" region="1 -2" />
-  <cell id="23" universe="1" material="3" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="24" universe="2" material="3" region="-3"   />
-  <cell id="25" universe="2" material="2" region="3 -4" />
-  <cell id="26" universe="2" material="3" region="4"    />
-
-  <!-- Fuel pin, cladding, hot water -->
-  <cell id="27" universe="3" material="1" region="-1"   />
-  <cell id="28" universe="3" material="2" region="1 -2" />
-  <cell id="29" universe="3" material="4" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="30" universe="4" material="4" region="-3"   />
-  <cell id="31" universe="4" material="2" region="3 -4" />
-  <cell id="32" universe="4" material="4" region="4"    />
-
-  <!-- cell for water assembly (cold) -->
-  <cell id="50" universe="5" material="4" region="34 -35" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="60" universe="6" fill="100"   region="34 -35" />
-
-  <!-- cell for water assembly (hot) -->
-  <cell id="70" universe="7" material="3" region="35 -36" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="80" universe="8" fill="101"   region="35 -36" />
-
-  <!-- Fuel Assembly (Lower Half) -->
-  <lattice id="100">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-    </universes>
-  </lattice>
-
-  <!-- Fuel Assembly (Upper Half) -->
-  <lattice id="101">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Lower Half) -->
-  <lattice id="200">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Upper Half) -->
-  <lattice id="201">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-    </universes>
-  </lattice>
-
-</geometry>
diff --git a/tests/test_filter_energy/inputs_true.dat b/tests/test_filter_energy/inputs_true.dat
new file mode 100644
index 0000000000..58da3ba3e0
--- /dev/null
+++ b/tests/test_filter_energy/inputs_true.dat
@@ -0,0 +1 @@
+bc9f43ff6368da544942b93ecfb2561911071c44524e35608fcb92c1262fe5543e09525414a87cd647fbc50113d64ff867730e5f4391f31b096abd7a0543b474
\ No newline at end of file
diff --git a/tests/test_filter_energy/materials.xml b/tests/test_filter_energy/materials.xml
deleted file mode 100644
index 9c0b74f3f1..0000000000
--- a/tests/test_filter_energy/materials.xml
+++ /dev/null
@@ -1,272 +0,0 @@
-<?xml version="1.0"?>
-<materials>
-
-  <default_xs>71c</default_xs>
-
-  <!-- Fuel composition -->
-  <material id="1">
-    <density value="10.062" units="g/cm3" />
-    <nuclide name="U-234"   ao="4.9476e-6" />
-    <nuclide name="U-235"   ao="4.8218e-4" />
-    <nuclide name="U-236"   ao="9.0402e-5" />
-    <nuclide name="U-238"   ao="2.1504e-2" />
-    <nuclide name="Np-237"  ao="7.3733e-6" />
-    <nuclide name="Pu-238"  ao="1.5148e-6" />
-    <nuclide name="Pu-239"  ao="1.3955e-4" />
-    <nuclide name="Pu-240"  ao="3.4405e-5" />
-    <nuclide name="Pu-241"  ao="2.1439e-5" />
-    <nuclide name="Pu-242"  ao="3.7422e-6" />
-    <nuclide name="Am-241"  ao="4.5041e-7" />
-    <nuclide name="Am-242m" ao="9.2301e-9" />
-    <nuclide name="Am-243"  ao="4.7878e-7" />
-    <nuclide name="Cm-242"  ao="1.0485e-7" />
-    <nuclide name="Cm-243"  ao="1.4268e-9" />
-    <nuclide name="Cm-244"  ao="8.8756e-8" />
-    <nuclide name="Cm-245"  ao="3.5285e-9" />
-    <nuclide name="Mo-95"   ao="2.6497e-5" />
-    <nuclide name="Tc-99"   ao="3.2772e-5" />
-    <nuclide name="Ru-101"  ao="3.0742e-5" />
-    <nuclide name="Ru-103"  ao="2.3505e-6" />
-    <nuclide name="Ag-109"  ao="2.0009e-6" />
-    <nuclide name="Xe-135"  ao="1.0801e-8" />
-    <nuclide name="Cs-133"  ao="3.4612e-5" />
-    <nuclide name="Nd-143"  ao="2.6078e-5" />
-    <nuclide name="Nd-145"  ao="1.9898e-5" />
-    <nuclide name="Sm-147"  ao="1.6128e-6" />
-    <nuclide name="Sm-149"  ao="1.1627e-7" />
-    <nuclide name="Sm-150"  ao="7.1727e-6" />
-    <nuclide name="Sm-151"  ao="5.4947e-7" />
-    <nuclide name="Sm-152"  ao="3.0221e-6" />
-    <nuclide name="Eu-153"  ao="2.6209e-6" />
-    <nuclide name="Gd-155"  ao="1.5369e-9" />
-    <nuclide name="O-16"    ao="4.5737e-2" />
-  </material>
-
-  <!-- Cladding composition -->
-  <material id="2">
-    <density value="5.77" units="g/cm3" />
-    <nuclide name="Zr-90" ao="0.5145" />
-    <nuclide name="Zr-91" ao="0.1122" />
-    <nuclide name="Zr-92" ao="0.1715" />
-    <nuclide name="Zr-94" ao="0.1738" />
-    <nuclide name="Zr-96" ao="0.0280" />
-  </material>
-
-  <!-- Cold borated water -->
-  <material id="3">
-    <density value="0.07416" units="atom/b-cm" />
-    <nuclide name="H-1" ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Hot borated water -->
-  <material id="4">
-    <density value="0.06614" units="atom/b-cm" />
-    <nuclide name="H-1"  ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- RPV Composition -->
-  <material id="5">
-    <density value="7.9" units="g/cm3" />
-    <nuclide name="Fe-54"  wo="0.05437098" />
-    <nuclide name="Fe-56"  wo="0.88500663" />
-    <nuclide name="Fe-57"  wo="0.0208008" />
-    <nuclide name="Fe-58"  wo="0.00282159" />
-    <nuclide name="Ni-58"  wo="0.0067198" />
-    <nuclide name="Ni-60"  wo="0.0026776" />
-    <nuclide name="Ni-61"  wo="0.0001183" />
-    <nuclide name="Ni-62"  wo="0.0003835" />
-    <nuclide name="Ni-64"  wo="0.0001008" />
-    <nuclide name="Mn-55"  wo="0.01" />
-    <nuclide name="Mo-92"  wo="0.000849" />
-    <nuclide name="Mo-94"  wo="0.0005418" />
-    <nuclide name="Mo-95"  wo="0.0009438" />
-    <nuclide name="Mo-96"  wo="0.0010002" />
-    <nuclide name="Mo-97"  wo="0.0005796" />
-    <nuclide name="Mo-98"  wo="0.0014814" />
-    <nuclide name="Mo-100" wo="0.0006042" />
-    <nuclide name="Si-28"  wo="0.00367464" />
-    <nuclide name="Si-29"  wo="0.00019336" />
-    <nuclide name="Si-30"  wo="0.000132" />
-    <nuclide name="Cr-50"  wo="0.00010435" />
-    <nuclide name="Cr-52"  wo="0.002092475" />
-    <nuclide name="Cr-53"  wo="0.00024185" />
-    <nuclide name="Cr-54"  wo="6.1325e-05" />
-    <nuclide name="C-Nat"  wo="0.0025" />
-    <nuclide name="Cu-63"  wo="0.0013696" />
-    <nuclide name="Cu-65"  wo="0.0006304" />
-  </material>
-
-  <!-- Lower radial reflector -->
-  <material id="6">
-    <density value="4.32" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0095661" />
-    <nuclide name="O-16"  wo="0.0759107" />
-    <nuclide name="B-10"  wo="3.08409e-5" />
-    <nuclide name="B-11"  wo="1.40499e-4" />
-    <nuclide name="Fe-54" wo="0.035620772088" />
-    <nuclide name="Fe-56" wo="0.579805982228" />
-    <nuclide name="Fe-57" wo="0.01362750048" />
-    <nuclide name="Fe-58" wo="0.001848545204" />
-    <nuclide name="Ni-58" wo="0.055298376566" />
-    <nuclide name="Ni-60" wo="0.022034425592" />
-    <nuclide name="Ni-61" wo="0.000973510811" />
-    <nuclide name="Ni-62" wo="0.003155886695" />
-    <nuclide name="Ni-64" wo="0.000829500336" />
-    <nuclide name="Mn-55" wo="0.0182870" />
-    <nuclide name="Si-28" wo="0.00839976771" />
-    <nuclide name="Si-29" wo="0.00044199679" />
-    <nuclide name="Si-30" wo="0.0003017355" />
-    <nuclide name="Cr-50" wo="0.007251360806" />
-    <nuclide name="Cr-52" wo="0.145407678031" />
-    <nuclide name="Cr-53" wo="0.016806340306" />
-    <nuclide name="Cr-54" wo="0.004261520857" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Upper radial reflector / Top plate region -->
-  <material id="7">
-    <density value="4.28" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0086117" />
-    <nuclide name="O-16"  wo="0.0683369" />
-    <nuclide name="B-10"  wo="2.77638e-5" />
-    <nuclide name="B-11"  wo="1.26481e-4" />
-    <nuclide name="Fe-54" wo="0.035953677186" />
-    <nuclide name="Fe-56" wo="0.585224740891" />
-    <nuclide name="Fe-57" wo="0.01375486056" />
-    <nuclide name="Fe-58" wo="0.001865821363" />
-    <nuclide name="Ni-58" wo="0.055815129186" />
-    <nuclide name="Ni-60" wo="0.022240333032" />
-    <nuclide name="Ni-61" wo="0.000982608081" />
-    <nuclide name="Ni-62" wo="0.003185377845" />
-    <nuclide name="Ni-64" wo="0.000837251856" />
-    <nuclide name="Mn-55" wo="0.0184579" />
-    <nuclide name="Si-28" wo="0.00847831314" />
-    <nuclide name="Si-29" wo="0.00044612986" />
-    <nuclide name="Si-30" wo="0.000304557" />
-    <nuclide name="Cr-50" wo="0.00731912987" />
-    <nuclide name="Cr-52" wo="0.146766614995" />
-    <nuclide name="Cr-53" wo="0.01696340737" />
-    <nuclide name="Cr-54" wo="0.004301347765" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom plate region -->
-  <material id="8">
-    <density value="7.184" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0011505" />
-    <nuclide name="O-16"  wo="0.0091296" />
-    <nuclide name="B-10"  wo="3.70915e-6" />
-    <nuclide name="B-11"  wo="1.68974e-5" />
-    <nuclide name="Fe-54" wo="0.03855611055" />
-    <nuclide name="Fe-56" wo="0.627585036425" />
-    <nuclide name="Fe-57" wo="0.014750478" />
-    <nuclide name="Fe-58" wo="0.002000875025" />
-    <nuclide name="Ni-58" wo="0.059855207342" />
-    <nuclide name="Ni-60" wo="0.023850159704" />
-    <nuclide name="Ni-61" wo="0.001053732407" />
-    <nuclide name="Ni-62" wo="0.003415945715" />
-    <nuclide name="Ni-64" wo="0.000897854832" />
-    <nuclide name="Mn-55" wo="0.0197940" />
-    <nuclide name="Si-28" wo="0.00909197802" />
-    <nuclide name="Si-29" wo="0.00047842098" />
-    <nuclide name="Si-30" wo="0.000326601" />
-    <nuclide name="Cr-50" wo="0.007848910646" />
-    <nuclide name="Cr-52" wo="0.157390026871" />
-    <nuclide name="Cr-53" wo="0.018191270146" />
-    <nuclide name="Cr-54" wo="0.004612692337" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom nozzle region -->
-  <material id="9">
-    <density value="2.53" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0245014" />
-    <nuclide name="O-16"  wo="0.1944274" />
-    <nuclide name="B-10"  wo="7.89917e-5" />
-    <nuclide name="B-11"  wo="3.59854e-4" />
-    <nuclide name="Fe-54" wo="0.030411411144" />
-    <nuclide name="Fe-56" wo="0.495012237964" />
-    <nuclide name="Fe-57" wo="0.01163454624" />
-    <nuclide name="Fe-58" wo="0.001578204652" />
-    <nuclide name="Ni-58" wo="0.047211231662" />
-    <nuclide name="Ni-60" wo="0.018811987544" />
-    <nuclide name="Ni-61" wo="0.000831139127" />
-    <nuclide name="Ni-62" wo="0.002694352115" />
-    <nuclide name="Ni-64" wo="0.000708189552" />
-    <nuclide name="Mn-55" wo="0.0156126" />
-    <nuclide name="Si-28" wo="0.007171335558" />
-    <nuclide name="Si-29" wo="0.000377356542" />
-    <nuclide name="Si-30" wo="0.0002576079" />
-    <nuclide name="Cr-50" wo="0.006190885148" />
-    <nuclide name="Cr-52" wo="0.124142524198" />
-    <nuclide name="Cr-53" wo="0.014348496148" />
-    <nuclide name="Cr-54" wo="0.003638294506" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top nozzle region -->
-  <material id="10">
-    <density value="1.746" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0358870" />
-    <nuclide name="O-16"  wo="0.2847761" />
-    <nuclide name="B-10"  wo="1.15699e-4" />
-    <nuclide name="B-11"  wo="5.27075e-4" />
-    <nuclide name="Fe-54" wo="0.02644016154" />
-    <nuclide name="Fe-56" wo="0.43037146399" />
-    <nuclide name="Fe-57" wo="0.0101152584" />
-    <nuclide name="Fe-58" wo="0.00137211607" />
-    <nuclide name="Ni-58" wo="0.04104621835" />
-    <nuclide name="Ni-60" wo="0.0163554502" />
-    <nuclide name="Ni-61" wo="0.000722605975" />
-    <nuclide name="Ni-62" wo="0.002342513875" />
-    <nuclide name="Ni-64" wo="0.0006157116" />
-    <nuclide name="Mn-55" wo="0.0135739" />
-    <nuclide name="Si-28" wo="0.006234853554" />
-    <nuclide name="Si-29" wo="0.000328078746" />
-    <nuclide name="Si-30" wo="0.0002239677" />
-    <nuclide name="Cr-50" wo="0.005382452306" />
-    <nuclide name="Cr-52" wo="0.107931450781" />
-    <nuclide name="Cr-53" wo="0.012474806806" />
-    <nuclide name="Cr-54" wo="0.003163190107" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top of Fuel Assemblies -->
-  <material id="11">
-    <density value="3.044" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0162913" />
-    <nuclide name="O-16"  wo="0.1292776" />
-    <nuclide name="B-10"  wo="5.25228e-5" />
-    <nuclide name="B-11"  wo="2.39272e-4" />
-    <nuclide name="Zr-90" wo="0.43313403903" />
-    <nuclide name="Zr-91" wo="0.09549277374" />
-    <nuclide name="Zr-92" wo="0.14759527104" />
-    <nuclide name="Zr-94" wo="0.15280552077" />
-    <nuclide name="Zr-96" wo="0.02511169542" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom of Fuel Assemblies -->
-  <material id="12">
-    <density value="1.762" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0292856" />
-    <nuclide name="O-16"  wo="0.2323919" />
-    <nuclide name="B-10"  wo="9.44159e-5" />
-    <nuclide name="B-11"  wo="4.30120e-4" />
-    <nuclide name="Zr-90" wo="0.3741373658" />
-    <nuclide name="Zr-91" wo="0.0824858164" />
-    <nuclide name="Zr-92" wo="0.1274914944" />
-    <nuclide name="Zr-94" wo="0.1319920622" />
-    <nuclide name="Zr-96" wo="0.0216912612" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-</materials>
diff --git a/tests/test_filter_energy/results_true.dat b/tests/test_filter_energy/results_true.dat
index e3f6cff98d..599e0bf888 100644
--- a/tests/test_filter_energy/results_true.dat
+++ b/tests/test_filter_energy/results_true.dat
@@ -1,11 +1,11 @@
 k-combined:
-1.005983E+00 2.248579E-02
+9.903196E-01 4.279617E-02
 tally 1:
-2.770022E+01
-1.559167E+02
-4.285040E+01
-3.679177E+02
-5.288354E+01
-5.619308E+02
-1.134904E+01
-2.579927E+01
+2.844008E+01
+1.619630E+02
+4.425619E+01
+3.938244E+02
+5.527425E+01
+6.120383E+02
+9.799897E+00
+1.957877E+01
diff --git a/tests/test_filter_energy/settings.xml b/tests/test_filter_energy/settings.xml
deleted file mode 100644
index 517637a59f..0000000000
--- a/tests/test_filter_energy/settings.xml
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0"?>
-<settings>
-
-  <eigenvalue>
-    <batches>10</batches>
-    <inactive>5</inactive>
-    <particles>100</particles>
-  </eigenvalue>
-
-  <source>
-    <space type="box">
-      <parameters>
-        -160 -160 -183
-         160  160  183
-      </parameters>
-    </space>
-  </source>
-
-</settings>
diff --git a/tests/test_filter_energy/tallies.xml b/tests/test_filter_energy/tallies.xml
deleted file mode 100644
index 69ce1d593b..0000000000
--- a/tests/test_filter_energy/tallies.xml
+++ /dev/null
@@ -1,9 +0,0 @@
-<?xml version="1.0"?>
-<tallies>
-
-  <tally id="1">
-    <filter type="energy" bins="0.0 0.253e-6 1.0e-3 1.0 20.0" />
-    <scores>total</scores>
-  </tally>
-
-</tallies>
\ No newline at end of file
diff --git a/tests/test_filter_energy/test_filter_energy.py b/tests/test_filter_energy/test_filter_energy.py
index 1777db993e..54d1dd4b7f 100644
--- a/tests/test_filter_energy/test_filter_energy.py
+++ b/tests/test_filter_energy/test_filter_energy.py
@@ -1,10 +1,30 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
-from testing_harness import TestHarness
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness, PyAPITestHarness
+import openmc
+
+
+class FilterEnergyTestHarness(PyAPITestHarness):
+    def _build_inputs(self):
+        filt = openmc.Filter(type='energy',
+                             bins=(0.0, 0.253e-6, 1.0e-3, 1.0, 20.0))
+        tally = openmc.Tally(tally_id=1)
+        tally.add_filter(filt)
+        tally.add_score('total')
+        self._input_set.tallies = openmc.TalliesFile()
+        self._input_set.tallies.add_tally(tally)
+
+        super(FilterEnergyTestHarness, self)._build_inputs()
+
+    def _cleanup(self):
+        super(FilterEnergyTestHarness, self)._cleanup()
+        f = os.path.join(os.getcwd(), 'tallies.xml')
+        if os.path.exists(f): os.remove(f)
 
 
 if __name__ == '__main__':
-    harness = TestHarness('statepoint.10.*', True)
+    harness = FilterEnergyTestHarness('statepoint.10.*', True)
     harness.main()
diff --git a/tests/test_filter_energyout/geometry.xml b/tests/test_filter_energyout/geometry.xml
deleted file mode 100644
index f6f067aadd..0000000000
--- a/tests/test_filter_energyout/geometry.xml
+++ /dev/null
@@ -1,181 +0,0 @@
-<?xml version="1.0"?>
-<geometry>
-
-  <surface id="1" type="z-cylinder" coeffs="0. 0. 0.41" />
-  <surface id="2" type="z-cylinder" coeffs="0. 0. 0.475" />
-  <surface id="3" type="z-cylinder" coeffs="0. 0. 0.56" />
-  <surface id="4" type="z-cylinder" coeffs="0. 0. 0.62" />
-  <surface id="5" type="z-cylinder" coeffs="0. 0. 187.6" />
-  <surface id="6" type="z-cylinder" coeffs="0. 0. 209.0" />
-  <surface id="7" type="z-cylinder" coeffs="0. 0. 229.0" />
-  <surface id="8" type="z-cylinder" coeffs="0. 0. 249.0" boundary="vacuum" />
-
-  <surface id="31" type="z-plane" coeffs="-229.0" boundary="vacuum" />
-  <surface id="32" type="z-plane" coeffs="-199.0" />
-  <surface id="33" type="z-plane" coeffs="-193.0" />
-  <surface id="34" type="z-plane" coeffs="-183.0" />
-  <surface id="35" type="z-plane" coeffs="0.0" />
-  <surface id="36" type="z-plane" coeffs="183.0" />
-  <surface id="37" type="z-plane" coeffs="203.0" />
-  <surface id="38" type="z-plane" coeffs="215.0" />
-  <surface id="39" type="z-plane" coeffs="223.0" boundary="vacuum" />
-
-  <!-- All geometry on base universe -->
-  <cell id="1"  fill="200"    region="  -6 34 -35" /> <!-- Lower core -->
-  <cell id="2"  fill="201"    region="  -6 35 -36" /> <!-- Upper core -->
-  <cell id="3"  material="8"  region="  -7 31 -32" /> <!-- Lower core plate region -->
-  <cell id="4"  material="9"  region="  -5 32 -33" /> <!-- Bottom nozzle region -->
-  <cell id="5"  material="12" region="  -5 33 -34" /> <!-- Bottom FA region -->
-  <cell id="6"  material="11" region="  -5 36 -37" /> <!-- Top FA region -->
-  <cell id="7"  material="10" region="  -5 37 -38" /> <!-- Top nozzle region -->
-  <cell id="8"  material="7"  region="  -7 38 -39" /> <!-- Upper plate region -->
-  <cell id="9"  material="4"  region="6 -7 32 -38" /> <!-- Downcomer -->
-  <cell id="10" material="5"  region="7 -8 31 -39" /> <!-- RPV -->
-  <cell id="11" material="6"  region="5 -6 32 -34" /> <!-- Bottom of radial reflector -->
-  <cell id="12" material="7"  region="5 -6 36 -38" /> <!-- Top of radial reflector -->
-
-  <!-- Fuel pin, cladding, cold water -->
-  <cell id="21" universe="1" material="1" region="-1"   />
-  <cell id="22" universe="1" material="2" region="1 -2" />
-  <cell id="23" universe="1" material="3" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="24" universe="2" material="3" region="-3"   />
-  <cell id="25" universe="2" material="2" region="3 -4" />
-  <cell id="26" universe="2" material="3" region="4"    />
-
-  <!-- Fuel pin, cladding, hot water -->
-  <cell id="27" universe="3" material="1" region="-1"   />
-  <cell id="28" universe="3" material="2" region="1 -2" />
-  <cell id="29" universe="3" material="4" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="30" universe="4" material="4" region="-3"   />
-  <cell id="31" universe="4" material="2" region="3 -4" />
-  <cell id="32" universe="4" material="4" region="4"    />
-
-  <!-- cell for water assembly (cold) -->
-  <cell id="50" universe="5" material="4" region="34 -35" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="60" universe="6" fill="100"   region="34 -35" />
-
-  <!-- cell for water assembly (hot) -->
-  <cell id="70" universe="7" material="3" region="35 -36" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="80" universe="8" fill="101"   region="35 -36" />
-
-  <!-- Fuel Assembly (Lower Half) -->
-  <lattice id="100">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-    </universes>
-  </lattice>
-
-  <!-- Fuel Assembly (Upper Half) -->
-  <lattice id="101">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Lower Half) -->
-  <lattice id="200">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Upper Half) -->
-  <lattice id="201">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-    </universes>
-  </lattice>
-
-</geometry>
diff --git a/tests/test_filter_energyout/inputs_true.dat b/tests/test_filter_energyout/inputs_true.dat
new file mode 100644
index 0000000000..4cfce0b49d
--- /dev/null
+++ b/tests/test_filter_energyout/inputs_true.dat
@@ -0,0 +1 @@
+74c55768b2b0f5696d5bff9d36a3639c6d858bf2984d799c8b46908b897af11e691b1f9f05646d52fcee046de3bfee11e35b9b379b2967abb0922f60168017b7
\ No newline at end of file
diff --git a/tests/test_filter_energyout/materials.xml b/tests/test_filter_energyout/materials.xml
deleted file mode 100644
index 9c0b74f3f1..0000000000
--- a/tests/test_filter_energyout/materials.xml
+++ /dev/null
@@ -1,272 +0,0 @@
-<?xml version="1.0"?>
-<materials>
-
-  <default_xs>71c</default_xs>
-
-  <!-- Fuel composition -->
-  <material id="1">
-    <density value="10.062" units="g/cm3" />
-    <nuclide name="U-234"   ao="4.9476e-6" />
-    <nuclide name="U-235"   ao="4.8218e-4" />
-    <nuclide name="U-236"   ao="9.0402e-5" />
-    <nuclide name="U-238"   ao="2.1504e-2" />
-    <nuclide name="Np-237"  ao="7.3733e-6" />
-    <nuclide name="Pu-238"  ao="1.5148e-6" />
-    <nuclide name="Pu-239"  ao="1.3955e-4" />
-    <nuclide name="Pu-240"  ao="3.4405e-5" />
-    <nuclide name="Pu-241"  ao="2.1439e-5" />
-    <nuclide name="Pu-242"  ao="3.7422e-6" />
-    <nuclide name="Am-241"  ao="4.5041e-7" />
-    <nuclide name="Am-242m" ao="9.2301e-9" />
-    <nuclide name="Am-243"  ao="4.7878e-7" />
-    <nuclide name="Cm-242"  ao="1.0485e-7" />
-    <nuclide name="Cm-243"  ao="1.4268e-9" />
-    <nuclide name="Cm-244"  ao="8.8756e-8" />
-    <nuclide name="Cm-245"  ao="3.5285e-9" />
-    <nuclide name="Mo-95"   ao="2.6497e-5" />
-    <nuclide name="Tc-99"   ao="3.2772e-5" />
-    <nuclide name="Ru-101"  ao="3.0742e-5" />
-    <nuclide name="Ru-103"  ao="2.3505e-6" />
-    <nuclide name="Ag-109"  ao="2.0009e-6" />
-    <nuclide name="Xe-135"  ao="1.0801e-8" />
-    <nuclide name="Cs-133"  ao="3.4612e-5" />
-    <nuclide name="Nd-143"  ao="2.6078e-5" />
-    <nuclide name="Nd-145"  ao="1.9898e-5" />
-    <nuclide name="Sm-147"  ao="1.6128e-6" />
-    <nuclide name="Sm-149"  ao="1.1627e-7" />
-    <nuclide name="Sm-150"  ao="7.1727e-6" />
-    <nuclide name="Sm-151"  ao="5.4947e-7" />
-    <nuclide name="Sm-152"  ao="3.0221e-6" />
-    <nuclide name="Eu-153"  ao="2.6209e-6" />
-    <nuclide name="Gd-155"  ao="1.5369e-9" />
-    <nuclide name="O-16"    ao="4.5737e-2" />
-  </material>
-
-  <!-- Cladding composition -->
-  <material id="2">
-    <density value="5.77" units="g/cm3" />
-    <nuclide name="Zr-90" ao="0.5145" />
-    <nuclide name="Zr-91" ao="0.1122" />
-    <nuclide name="Zr-92" ao="0.1715" />
-    <nuclide name="Zr-94" ao="0.1738" />
-    <nuclide name="Zr-96" ao="0.0280" />
-  </material>
-
-  <!-- Cold borated water -->
-  <material id="3">
-    <density value="0.07416" units="atom/b-cm" />
-    <nuclide name="H-1" ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Hot borated water -->
-  <material id="4">
-    <density value="0.06614" units="atom/b-cm" />
-    <nuclide name="H-1"  ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- RPV Composition -->
-  <material id="5">
-    <density value="7.9" units="g/cm3" />
-    <nuclide name="Fe-54"  wo="0.05437098" />
-    <nuclide name="Fe-56"  wo="0.88500663" />
-    <nuclide name="Fe-57"  wo="0.0208008" />
-    <nuclide name="Fe-58"  wo="0.00282159" />
-    <nuclide name="Ni-58"  wo="0.0067198" />
-    <nuclide name="Ni-60"  wo="0.0026776" />
-    <nuclide name="Ni-61"  wo="0.0001183" />
-    <nuclide name="Ni-62"  wo="0.0003835" />
-    <nuclide name="Ni-64"  wo="0.0001008" />
-    <nuclide name="Mn-55"  wo="0.01" />
-    <nuclide name="Mo-92"  wo="0.000849" />
-    <nuclide name="Mo-94"  wo="0.0005418" />
-    <nuclide name="Mo-95"  wo="0.0009438" />
-    <nuclide name="Mo-96"  wo="0.0010002" />
-    <nuclide name="Mo-97"  wo="0.0005796" />
-    <nuclide name="Mo-98"  wo="0.0014814" />
-    <nuclide name="Mo-100" wo="0.0006042" />
-    <nuclide name="Si-28"  wo="0.00367464" />
-    <nuclide name="Si-29"  wo="0.00019336" />
-    <nuclide name="Si-30"  wo="0.000132" />
-    <nuclide name="Cr-50"  wo="0.00010435" />
-    <nuclide name="Cr-52"  wo="0.002092475" />
-    <nuclide name="Cr-53"  wo="0.00024185" />
-    <nuclide name="Cr-54"  wo="6.1325e-05" />
-    <nuclide name="C-Nat"  wo="0.0025" />
-    <nuclide name="Cu-63"  wo="0.0013696" />
-    <nuclide name="Cu-65"  wo="0.0006304" />
-  </material>
-
-  <!-- Lower radial reflector -->
-  <material id="6">
-    <density value="4.32" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0095661" />
-    <nuclide name="O-16"  wo="0.0759107" />
-    <nuclide name="B-10"  wo="3.08409e-5" />
-    <nuclide name="B-11"  wo="1.40499e-4" />
-    <nuclide name="Fe-54" wo="0.035620772088" />
-    <nuclide name="Fe-56" wo="0.579805982228" />
-    <nuclide name="Fe-57" wo="0.01362750048" />
-    <nuclide name="Fe-58" wo="0.001848545204" />
-    <nuclide name="Ni-58" wo="0.055298376566" />
-    <nuclide name="Ni-60" wo="0.022034425592" />
-    <nuclide name="Ni-61" wo="0.000973510811" />
-    <nuclide name="Ni-62" wo="0.003155886695" />
-    <nuclide name="Ni-64" wo="0.000829500336" />
-    <nuclide name="Mn-55" wo="0.0182870" />
-    <nuclide name="Si-28" wo="0.00839976771" />
-    <nuclide name="Si-29" wo="0.00044199679" />
-    <nuclide name="Si-30" wo="0.0003017355" />
-    <nuclide name="Cr-50" wo="0.007251360806" />
-    <nuclide name="Cr-52" wo="0.145407678031" />
-    <nuclide name="Cr-53" wo="0.016806340306" />
-    <nuclide name="Cr-54" wo="0.004261520857" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Upper radial reflector / Top plate region -->
-  <material id="7">
-    <density value="4.28" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0086117" />
-    <nuclide name="O-16"  wo="0.0683369" />
-    <nuclide name="B-10"  wo="2.77638e-5" />
-    <nuclide name="B-11"  wo="1.26481e-4" />
-    <nuclide name="Fe-54" wo="0.035953677186" />
-    <nuclide name="Fe-56" wo="0.585224740891" />
-    <nuclide name="Fe-57" wo="0.01375486056" />
-    <nuclide name="Fe-58" wo="0.001865821363" />
-    <nuclide name="Ni-58" wo="0.055815129186" />
-    <nuclide name="Ni-60" wo="0.022240333032" />
-    <nuclide name="Ni-61" wo="0.000982608081" />
-    <nuclide name="Ni-62" wo="0.003185377845" />
-    <nuclide name="Ni-64" wo="0.000837251856" />
-    <nuclide name="Mn-55" wo="0.0184579" />
-    <nuclide name="Si-28" wo="0.00847831314" />
-    <nuclide name="Si-29" wo="0.00044612986" />
-    <nuclide name="Si-30" wo="0.000304557" />
-    <nuclide name="Cr-50" wo="0.00731912987" />
-    <nuclide name="Cr-52" wo="0.146766614995" />
-    <nuclide name="Cr-53" wo="0.01696340737" />
-    <nuclide name="Cr-54" wo="0.004301347765" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom plate region -->
-  <material id="8">
-    <density value="7.184" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0011505" />
-    <nuclide name="O-16"  wo="0.0091296" />
-    <nuclide name="B-10"  wo="3.70915e-6" />
-    <nuclide name="B-11"  wo="1.68974e-5" />
-    <nuclide name="Fe-54" wo="0.03855611055" />
-    <nuclide name="Fe-56" wo="0.627585036425" />
-    <nuclide name="Fe-57" wo="0.014750478" />
-    <nuclide name="Fe-58" wo="0.002000875025" />
-    <nuclide name="Ni-58" wo="0.059855207342" />
-    <nuclide name="Ni-60" wo="0.023850159704" />
-    <nuclide name="Ni-61" wo="0.001053732407" />
-    <nuclide name="Ni-62" wo="0.003415945715" />
-    <nuclide name="Ni-64" wo="0.000897854832" />
-    <nuclide name="Mn-55" wo="0.0197940" />
-    <nuclide name="Si-28" wo="0.00909197802" />
-    <nuclide name="Si-29" wo="0.00047842098" />
-    <nuclide name="Si-30" wo="0.000326601" />
-    <nuclide name="Cr-50" wo="0.007848910646" />
-    <nuclide name="Cr-52" wo="0.157390026871" />
-    <nuclide name="Cr-53" wo="0.018191270146" />
-    <nuclide name="Cr-54" wo="0.004612692337" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom nozzle region -->
-  <material id="9">
-    <density value="2.53" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0245014" />
-    <nuclide name="O-16"  wo="0.1944274" />
-    <nuclide name="B-10"  wo="7.89917e-5" />
-    <nuclide name="B-11"  wo="3.59854e-4" />
-    <nuclide name="Fe-54" wo="0.030411411144" />
-    <nuclide name="Fe-56" wo="0.495012237964" />
-    <nuclide name="Fe-57" wo="0.01163454624" />
-    <nuclide name="Fe-58" wo="0.001578204652" />
-    <nuclide name="Ni-58" wo="0.047211231662" />
-    <nuclide name="Ni-60" wo="0.018811987544" />
-    <nuclide name="Ni-61" wo="0.000831139127" />
-    <nuclide name="Ni-62" wo="0.002694352115" />
-    <nuclide name="Ni-64" wo="0.000708189552" />
-    <nuclide name="Mn-55" wo="0.0156126" />
-    <nuclide name="Si-28" wo="0.007171335558" />
-    <nuclide name="Si-29" wo="0.000377356542" />
-    <nuclide name="Si-30" wo="0.0002576079" />
-    <nuclide name="Cr-50" wo="0.006190885148" />
-    <nuclide name="Cr-52" wo="0.124142524198" />
-    <nuclide name="Cr-53" wo="0.014348496148" />
-    <nuclide name="Cr-54" wo="0.003638294506" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top nozzle region -->
-  <material id="10">
-    <density value="1.746" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0358870" />
-    <nuclide name="O-16"  wo="0.2847761" />
-    <nuclide name="B-10"  wo="1.15699e-4" />
-    <nuclide name="B-11"  wo="5.27075e-4" />
-    <nuclide name="Fe-54" wo="0.02644016154" />
-    <nuclide name="Fe-56" wo="0.43037146399" />
-    <nuclide name="Fe-57" wo="0.0101152584" />
-    <nuclide name="Fe-58" wo="0.00137211607" />
-    <nuclide name="Ni-58" wo="0.04104621835" />
-    <nuclide name="Ni-60" wo="0.0163554502" />
-    <nuclide name="Ni-61" wo="0.000722605975" />
-    <nuclide name="Ni-62" wo="0.002342513875" />
-    <nuclide name="Ni-64" wo="0.0006157116" />
-    <nuclide name="Mn-55" wo="0.0135739" />
-    <nuclide name="Si-28" wo="0.006234853554" />
-    <nuclide name="Si-29" wo="0.000328078746" />
-    <nuclide name="Si-30" wo="0.0002239677" />
-    <nuclide name="Cr-50" wo="0.005382452306" />
-    <nuclide name="Cr-52" wo="0.107931450781" />
-    <nuclide name="Cr-53" wo="0.012474806806" />
-    <nuclide name="Cr-54" wo="0.003163190107" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top of Fuel Assemblies -->
-  <material id="11">
-    <density value="3.044" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0162913" />
-    <nuclide name="O-16"  wo="0.1292776" />
-    <nuclide name="B-10"  wo="5.25228e-5" />
-    <nuclide name="B-11"  wo="2.39272e-4" />
-    <nuclide name="Zr-90" wo="0.43313403903" />
-    <nuclide name="Zr-91" wo="0.09549277374" />
-    <nuclide name="Zr-92" wo="0.14759527104" />
-    <nuclide name="Zr-94" wo="0.15280552077" />
-    <nuclide name="Zr-96" wo="0.02511169542" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom of Fuel Assemblies -->
-  <material id="12">
-    <density value="1.762" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0292856" />
-    <nuclide name="O-16"  wo="0.2323919" />
-    <nuclide name="B-10"  wo="9.44159e-5" />
-    <nuclide name="B-11"  wo="4.30120e-4" />
-    <nuclide name="Zr-90" wo="0.3741373658" />
-    <nuclide name="Zr-91" wo="0.0824858164" />
-    <nuclide name="Zr-92" wo="0.1274914944" />
-    <nuclide name="Zr-94" wo="0.1319920622" />
-    <nuclide name="Zr-96" wo="0.0216912612" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-</materials>
diff --git a/tests/test_filter_energyout/results_true.dat b/tests/test_filter_energyout/results_true.dat
index 649f4d7259..814385d5a4 100644
--- a/tests/test_filter_energyout/results_true.dat
+++ b/tests/test_filter_energyout/results_true.dat
@@ -1,11 +1,11 @@
 k-combined:
-1.005983E+00 2.248579E-02
+9.903196E-01 4.279617E-02
 tally 1:
-2.835000E+01
-1.631463E+02
-4.252000E+01
-3.622146E+02
-5.192000E+01
-5.401444E+02
-7.390000E+00
-1.097710E+01
+2.842000E+01
+1.620214E+02
+4.361000E+01
+3.810139E+02
+5.297000E+01
+5.616595E+02
+6.530000E+00
+8.828900E+00
diff --git a/tests/test_filter_energyout/settings.xml b/tests/test_filter_energyout/settings.xml
deleted file mode 100644
index 517637a59f..0000000000
--- a/tests/test_filter_energyout/settings.xml
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0"?>
-<settings>
-
-  <eigenvalue>
-    <batches>10</batches>
-    <inactive>5</inactive>
-    <particles>100</particles>
-  </eigenvalue>
-
-  <source>
-    <space type="box">
-      <parameters>
-        -160 -160 -183
-         160  160  183
-      </parameters>
-    </space>
-  </source>
-
-</settings>
diff --git a/tests/test_filter_energyout/tallies.xml b/tests/test_filter_energyout/tallies.xml
deleted file mode 100644
index ebec597f13..0000000000
--- a/tests/test_filter_energyout/tallies.xml
+++ /dev/null
@@ -1,9 +0,0 @@
-<?xml version="1.0"?>
-<tallies>
-
-  <tally id="1">
-    <filter type="energyout" bins="0.0 0.253e-6 1.0e-3 1.0 20.0" />
-    <scores>scatter</scores>
-  </tally>
-
-</tallies>
\ No newline at end of file
diff --git a/tests/test_filter_energyout/test_filter_energyout.py b/tests/test_filter_energyout/test_filter_energyout.py
index 1777db993e..43a8c7d5a9 100644
--- a/tests/test_filter_energyout/test_filter_energyout.py
+++ b/tests/test_filter_energyout/test_filter_energyout.py
@@ -1,10 +1,30 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
-from testing_harness import TestHarness
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness, PyAPITestHarness
+import openmc
+
+
+class FilterEnergyoutTestHarness(PyAPITestHarness):
+    def _build_inputs(self):
+        filt = openmc.Filter(type='energyout',
+                             bins=(0.0, 0.253e-6, 1.0e-3, 1.0, 20.0))
+        tally = openmc.Tally(tally_id=1)
+        tally.add_filter(filt)
+        tally.add_score('scatter')
+        self._input_set.tallies = openmc.TalliesFile()
+        self._input_set.tallies.add_tally(tally)
+
+        super(FilterEnergyoutTestHarness, self)._build_inputs()
+
+    def _cleanup(self):
+        super(FilterEnergyoutTestHarness, self)._cleanup()
+        f = os.path.join(os.getcwd(), 'tallies.xml')
+        if os.path.exists(f): os.remove(f)
 
 
 if __name__ == '__main__':
-    harness = TestHarness('statepoint.10.*', True)
+    harness = FilterEnergyoutTestHarness('statepoint.10.*', True)
     harness.main()
diff --git a/tests/test_filter_group_transfer/geometry.xml b/tests/test_filter_group_transfer/geometry.xml
deleted file mode 100644
index f6f067aadd..0000000000
--- a/tests/test_filter_group_transfer/geometry.xml
+++ /dev/null
@@ -1,181 +0,0 @@
-<?xml version="1.0"?>
-<geometry>
-
-  <surface id="1" type="z-cylinder" coeffs="0. 0. 0.41" />
-  <surface id="2" type="z-cylinder" coeffs="0. 0. 0.475" />
-  <surface id="3" type="z-cylinder" coeffs="0. 0. 0.56" />
-  <surface id="4" type="z-cylinder" coeffs="0. 0. 0.62" />
-  <surface id="5" type="z-cylinder" coeffs="0. 0. 187.6" />
-  <surface id="6" type="z-cylinder" coeffs="0. 0. 209.0" />
-  <surface id="7" type="z-cylinder" coeffs="0. 0. 229.0" />
-  <surface id="8" type="z-cylinder" coeffs="0. 0. 249.0" boundary="vacuum" />
-
-  <surface id="31" type="z-plane" coeffs="-229.0" boundary="vacuum" />
-  <surface id="32" type="z-plane" coeffs="-199.0" />
-  <surface id="33" type="z-plane" coeffs="-193.0" />
-  <surface id="34" type="z-plane" coeffs="-183.0" />
-  <surface id="35" type="z-plane" coeffs="0.0" />
-  <surface id="36" type="z-plane" coeffs="183.0" />
-  <surface id="37" type="z-plane" coeffs="203.0" />
-  <surface id="38" type="z-plane" coeffs="215.0" />
-  <surface id="39" type="z-plane" coeffs="223.0" boundary="vacuum" />
-
-  <!-- All geometry on base universe -->
-  <cell id="1"  fill="200"    region="  -6 34 -35" /> <!-- Lower core -->
-  <cell id="2"  fill="201"    region="  -6 35 -36" /> <!-- Upper core -->
-  <cell id="3"  material="8"  region="  -7 31 -32" /> <!-- Lower core plate region -->
-  <cell id="4"  material="9"  region="  -5 32 -33" /> <!-- Bottom nozzle region -->
-  <cell id="5"  material="12" region="  -5 33 -34" /> <!-- Bottom FA region -->
-  <cell id="6"  material="11" region="  -5 36 -37" /> <!-- Top FA region -->
-  <cell id="7"  material="10" region="  -5 37 -38" /> <!-- Top nozzle region -->
-  <cell id="8"  material="7"  region="  -7 38 -39" /> <!-- Upper plate region -->
-  <cell id="9"  material="4"  region="6 -7 32 -38" /> <!-- Downcomer -->
-  <cell id="10" material="5"  region="7 -8 31 -39" /> <!-- RPV -->
-  <cell id="11" material="6"  region="5 -6 32 -34" /> <!-- Bottom of radial reflector -->
-  <cell id="12" material="7"  region="5 -6 36 -38" /> <!-- Top of radial reflector -->
-
-  <!-- Fuel pin, cladding, cold water -->
-  <cell id="21" universe="1" material="1" region="-1"   />
-  <cell id="22" universe="1" material="2" region="1 -2" />
-  <cell id="23" universe="1" material="3" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="24" universe="2" material="3" region="-3"   />
-  <cell id="25" universe="2" material="2" region="3 -4" />
-  <cell id="26" universe="2" material="3" region="4"    />
-
-  <!-- Fuel pin, cladding, hot water -->
-  <cell id="27" universe="3" material="1" region="-1"   />
-  <cell id="28" universe="3" material="2" region="1 -2" />
-  <cell id="29" universe="3" material="4" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="30" universe="4" material="4" region="-3"   />
-  <cell id="31" universe="4" material="2" region="3 -4" />
-  <cell id="32" universe="4" material="4" region="4"    />
-
-  <!-- cell for water assembly (cold) -->
-  <cell id="50" universe="5" material="4" region="34 -35" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="60" universe="6" fill="100"   region="34 -35" />
-
-  <!-- cell for water assembly (hot) -->
-  <cell id="70" universe="7" material="3" region="35 -36" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="80" universe="8" fill="101"   region="35 -36" />
-
-  <!-- Fuel Assembly (Lower Half) -->
-  <lattice id="100">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-    </universes>
-  </lattice>
-
-  <!-- Fuel Assembly (Upper Half) -->
-  <lattice id="101">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Lower Half) -->
-  <lattice id="200">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Upper Half) -->
-  <lattice id="201">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-    </universes>
-  </lattice>
-
-</geometry>
diff --git a/tests/test_filter_group_transfer/inputs_true.dat b/tests/test_filter_group_transfer/inputs_true.dat
new file mode 100644
index 0000000000..f98d11bd2b
--- /dev/null
+++ b/tests/test_filter_group_transfer/inputs_true.dat
@@ -0,0 +1 @@
+dd69e0768aa7a4e28efd20adc6a607337c9a15682fa307b1aa2459595f90a523f1fa6e4e4f6db1d74e52a2287ef4efa85d77b1751cd1a2d2e6618385cf7f4607
\ No newline at end of file
diff --git a/tests/test_filter_group_transfer/materials.xml b/tests/test_filter_group_transfer/materials.xml
deleted file mode 100644
index 9c0b74f3f1..0000000000
--- a/tests/test_filter_group_transfer/materials.xml
+++ /dev/null
@@ -1,272 +0,0 @@
-<?xml version="1.0"?>
-<materials>
-
-  <default_xs>71c</default_xs>
-
-  <!-- Fuel composition -->
-  <material id="1">
-    <density value="10.062" units="g/cm3" />
-    <nuclide name="U-234"   ao="4.9476e-6" />
-    <nuclide name="U-235"   ao="4.8218e-4" />
-    <nuclide name="U-236"   ao="9.0402e-5" />
-    <nuclide name="U-238"   ao="2.1504e-2" />
-    <nuclide name="Np-237"  ao="7.3733e-6" />
-    <nuclide name="Pu-238"  ao="1.5148e-6" />
-    <nuclide name="Pu-239"  ao="1.3955e-4" />
-    <nuclide name="Pu-240"  ao="3.4405e-5" />
-    <nuclide name="Pu-241"  ao="2.1439e-5" />
-    <nuclide name="Pu-242"  ao="3.7422e-6" />
-    <nuclide name="Am-241"  ao="4.5041e-7" />
-    <nuclide name="Am-242m" ao="9.2301e-9" />
-    <nuclide name="Am-243"  ao="4.7878e-7" />
-    <nuclide name="Cm-242"  ao="1.0485e-7" />
-    <nuclide name="Cm-243"  ao="1.4268e-9" />
-    <nuclide name="Cm-244"  ao="8.8756e-8" />
-    <nuclide name="Cm-245"  ao="3.5285e-9" />
-    <nuclide name="Mo-95"   ao="2.6497e-5" />
-    <nuclide name="Tc-99"   ao="3.2772e-5" />
-    <nuclide name="Ru-101"  ao="3.0742e-5" />
-    <nuclide name="Ru-103"  ao="2.3505e-6" />
-    <nuclide name="Ag-109"  ao="2.0009e-6" />
-    <nuclide name="Xe-135"  ao="1.0801e-8" />
-    <nuclide name="Cs-133"  ao="3.4612e-5" />
-    <nuclide name="Nd-143"  ao="2.6078e-5" />
-    <nuclide name="Nd-145"  ao="1.9898e-5" />
-    <nuclide name="Sm-147"  ao="1.6128e-6" />
-    <nuclide name="Sm-149"  ao="1.1627e-7" />
-    <nuclide name="Sm-150"  ao="7.1727e-6" />
-    <nuclide name="Sm-151"  ao="5.4947e-7" />
-    <nuclide name="Sm-152"  ao="3.0221e-6" />
-    <nuclide name="Eu-153"  ao="2.6209e-6" />
-    <nuclide name="Gd-155"  ao="1.5369e-9" />
-    <nuclide name="O-16"    ao="4.5737e-2" />
-  </material>
-
-  <!-- Cladding composition -->
-  <material id="2">
-    <density value="5.77" units="g/cm3" />
-    <nuclide name="Zr-90" ao="0.5145" />
-    <nuclide name="Zr-91" ao="0.1122" />
-    <nuclide name="Zr-92" ao="0.1715" />
-    <nuclide name="Zr-94" ao="0.1738" />
-    <nuclide name="Zr-96" ao="0.0280" />
-  </material>
-
-  <!-- Cold borated water -->
-  <material id="3">
-    <density value="0.07416" units="atom/b-cm" />
-    <nuclide name="H-1" ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Hot borated water -->
-  <material id="4">
-    <density value="0.06614" units="atom/b-cm" />
-    <nuclide name="H-1"  ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- RPV Composition -->
-  <material id="5">
-    <density value="7.9" units="g/cm3" />
-    <nuclide name="Fe-54"  wo="0.05437098" />
-    <nuclide name="Fe-56"  wo="0.88500663" />
-    <nuclide name="Fe-57"  wo="0.0208008" />
-    <nuclide name="Fe-58"  wo="0.00282159" />
-    <nuclide name="Ni-58"  wo="0.0067198" />
-    <nuclide name="Ni-60"  wo="0.0026776" />
-    <nuclide name="Ni-61"  wo="0.0001183" />
-    <nuclide name="Ni-62"  wo="0.0003835" />
-    <nuclide name="Ni-64"  wo="0.0001008" />
-    <nuclide name="Mn-55"  wo="0.01" />
-    <nuclide name="Mo-92"  wo="0.000849" />
-    <nuclide name="Mo-94"  wo="0.0005418" />
-    <nuclide name="Mo-95"  wo="0.0009438" />
-    <nuclide name="Mo-96"  wo="0.0010002" />
-    <nuclide name="Mo-97"  wo="0.0005796" />
-    <nuclide name="Mo-98"  wo="0.0014814" />
-    <nuclide name="Mo-100" wo="0.0006042" />
-    <nuclide name="Si-28"  wo="0.00367464" />
-    <nuclide name="Si-29"  wo="0.00019336" />
-    <nuclide name="Si-30"  wo="0.000132" />
-    <nuclide name="Cr-50"  wo="0.00010435" />
-    <nuclide name="Cr-52"  wo="0.002092475" />
-    <nuclide name="Cr-53"  wo="0.00024185" />
-    <nuclide name="Cr-54"  wo="6.1325e-05" />
-    <nuclide name="C-Nat"  wo="0.0025" />
-    <nuclide name="Cu-63"  wo="0.0013696" />
-    <nuclide name="Cu-65"  wo="0.0006304" />
-  </material>
-
-  <!-- Lower radial reflector -->
-  <material id="6">
-    <density value="4.32" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0095661" />
-    <nuclide name="O-16"  wo="0.0759107" />
-    <nuclide name="B-10"  wo="3.08409e-5" />
-    <nuclide name="B-11"  wo="1.40499e-4" />
-    <nuclide name="Fe-54" wo="0.035620772088" />
-    <nuclide name="Fe-56" wo="0.579805982228" />
-    <nuclide name="Fe-57" wo="0.01362750048" />
-    <nuclide name="Fe-58" wo="0.001848545204" />
-    <nuclide name="Ni-58" wo="0.055298376566" />
-    <nuclide name="Ni-60" wo="0.022034425592" />
-    <nuclide name="Ni-61" wo="0.000973510811" />
-    <nuclide name="Ni-62" wo="0.003155886695" />
-    <nuclide name="Ni-64" wo="0.000829500336" />
-    <nuclide name="Mn-55" wo="0.0182870" />
-    <nuclide name="Si-28" wo="0.00839976771" />
-    <nuclide name="Si-29" wo="0.00044199679" />
-    <nuclide name="Si-30" wo="0.0003017355" />
-    <nuclide name="Cr-50" wo="0.007251360806" />
-    <nuclide name="Cr-52" wo="0.145407678031" />
-    <nuclide name="Cr-53" wo="0.016806340306" />
-    <nuclide name="Cr-54" wo="0.004261520857" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Upper radial reflector / Top plate region -->
-  <material id="7">
-    <density value="4.28" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0086117" />
-    <nuclide name="O-16"  wo="0.0683369" />
-    <nuclide name="B-10"  wo="2.77638e-5" />
-    <nuclide name="B-11"  wo="1.26481e-4" />
-    <nuclide name="Fe-54" wo="0.035953677186" />
-    <nuclide name="Fe-56" wo="0.585224740891" />
-    <nuclide name="Fe-57" wo="0.01375486056" />
-    <nuclide name="Fe-58" wo="0.001865821363" />
-    <nuclide name="Ni-58" wo="0.055815129186" />
-    <nuclide name="Ni-60" wo="0.022240333032" />
-    <nuclide name="Ni-61" wo="0.000982608081" />
-    <nuclide name="Ni-62" wo="0.003185377845" />
-    <nuclide name="Ni-64" wo="0.000837251856" />
-    <nuclide name="Mn-55" wo="0.0184579" />
-    <nuclide name="Si-28" wo="0.00847831314" />
-    <nuclide name="Si-29" wo="0.00044612986" />
-    <nuclide name="Si-30" wo="0.000304557" />
-    <nuclide name="Cr-50" wo="0.00731912987" />
-    <nuclide name="Cr-52" wo="0.146766614995" />
-    <nuclide name="Cr-53" wo="0.01696340737" />
-    <nuclide name="Cr-54" wo="0.004301347765" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom plate region -->
-  <material id="8">
-    <density value="7.184" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0011505" />
-    <nuclide name="O-16"  wo="0.0091296" />
-    <nuclide name="B-10"  wo="3.70915e-6" />
-    <nuclide name="B-11"  wo="1.68974e-5" />
-    <nuclide name="Fe-54" wo="0.03855611055" />
-    <nuclide name="Fe-56" wo="0.627585036425" />
-    <nuclide name="Fe-57" wo="0.014750478" />
-    <nuclide name="Fe-58" wo="0.002000875025" />
-    <nuclide name="Ni-58" wo="0.059855207342" />
-    <nuclide name="Ni-60" wo="0.023850159704" />
-    <nuclide name="Ni-61" wo="0.001053732407" />
-    <nuclide name="Ni-62" wo="0.003415945715" />
-    <nuclide name="Ni-64" wo="0.000897854832" />
-    <nuclide name="Mn-55" wo="0.0197940" />
-    <nuclide name="Si-28" wo="0.00909197802" />
-    <nuclide name="Si-29" wo="0.00047842098" />
-    <nuclide name="Si-30" wo="0.000326601" />
-    <nuclide name="Cr-50" wo="0.007848910646" />
-    <nuclide name="Cr-52" wo="0.157390026871" />
-    <nuclide name="Cr-53" wo="0.018191270146" />
-    <nuclide name="Cr-54" wo="0.004612692337" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom nozzle region -->
-  <material id="9">
-    <density value="2.53" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0245014" />
-    <nuclide name="O-16"  wo="0.1944274" />
-    <nuclide name="B-10"  wo="7.89917e-5" />
-    <nuclide name="B-11"  wo="3.59854e-4" />
-    <nuclide name="Fe-54" wo="0.030411411144" />
-    <nuclide name="Fe-56" wo="0.495012237964" />
-    <nuclide name="Fe-57" wo="0.01163454624" />
-    <nuclide name="Fe-58" wo="0.001578204652" />
-    <nuclide name="Ni-58" wo="0.047211231662" />
-    <nuclide name="Ni-60" wo="0.018811987544" />
-    <nuclide name="Ni-61" wo="0.000831139127" />
-    <nuclide name="Ni-62" wo="0.002694352115" />
-    <nuclide name="Ni-64" wo="0.000708189552" />
-    <nuclide name="Mn-55" wo="0.0156126" />
-    <nuclide name="Si-28" wo="0.007171335558" />
-    <nuclide name="Si-29" wo="0.000377356542" />
-    <nuclide name="Si-30" wo="0.0002576079" />
-    <nuclide name="Cr-50" wo="0.006190885148" />
-    <nuclide name="Cr-52" wo="0.124142524198" />
-    <nuclide name="Cr-53" wo="0.014348496148" />
-    <nuclide name="Cr-54" wo="0.003638294506" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top nozzle region -->
-  <material id="10">
-    <density value="1.746" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0358870" />
-    <nuclide name="O-16"  wo="0.2847761" />
-    <nuclide name="B-10"  wo="1.15699e-4" />
-    <nuclide name="B-11"  wo="5.27075e-4" />
-    <nuclide name="Fe-54" wo="0.02644016154" />
-    <nuclide name="Fe-56" wo="0.43037146399" />
-    <nuclide name="Fe-57" wo="0.0101152584" />
-    <nuclide name="Fe-58" wo="0.00137211607" />
-    <nuclide name="Ni-58" wo="0.04104621835" />
-    <nuclide name="Ni-60" wo="0.0163554502" />
-    <nuclide name="Ni-61" wo="0.000722605975" />
-    <nuclide name="Ni-62" wo="0.002342513875" />
-    <nuclide name="Ni-64" wo="0.0006157116" />
-    <nuclide name="Mn-55" wo="0.0135739" />
-    <nuclide name="Si-28" wo="0.006234853554" />
-    <nuclide name="Si-29" wo="0.000328078746" />
-    <nuclide name="Si-30" wo="0.0002239677" />
-    <nuclide name="Cr-50" wo="0.005382452306" />
-    <nuclide name="Cr-52" wo="0.107931450781" />
-    <nuclide name="Cr-53" wo="0.012474806806" />
-    <nuclide name="Cr-54" wo="0.003163190107" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top of Fuel Assemblies -->
-  <material id="11">
-    <density value="3.044" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0162913" />
-    <nuclide name="O-16"  wo="0.1292776" />
-    <nuclide name="B-10"  wo="5.25228e-5" />
-    <nuclide name="B-11"  wo="2.39272e-4" />
-    <nuclide name="Zr-90" wo="0.43313403903" />
-    <nuclide name="Zr-91" wo="0.09549277374" />
-    <nuclide name="Zr-92" wo="0.14759527104" />
-    <nuclide name="Zr-94" wo="0.15280552077" />
-    <nuclide name="Zr-96" wo="0.02511169542" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom of Fuel Assemblies -->
-  <material id="12">
-    <density value="1.762" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0292856" />
-    <nuclide name="O-16"  wo="0.2323919" />
-    <nuclide name="B-10"  wo="9.44159e-5" />
-    <nuclide name="B-11"  wo="4.30120e-4" />
-    <nuclide name="Zr-90" wo="0.3741373658" />
-    <nuclide name="Zr-91" wo="0.0824858164" />
-    <nuclide name="Zr-92" wo="0.1274914944" />
-    <nuclide name="Zr-94" wo="0.1319920622" />
-    <nuclide name="Zr-96" wo="0.0216912612" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-</materials>
diff --git a/tests/test_filter_group_transfer/results_true.dat b/tests/test_filter_group_transfer/results_true.dat
index f2d5faa991..c41451e776 100644
--- a/tests/test_filter_group_transfer/results_true.dat
+++ b/tests/test_filter_group_transfer/results_true.dat
@@ -1,54 +1,54 @@
 k-combined:
-1.005983E+00 2.248579E-02
+9.903196E-01 4.279617E-02
 tally 1:
-2.571000E+01
-1.344145E+02
+2.576000E+01
+1.331666E+02
 0.000000E+00
 0.000000E+00
-2.000000E-02
-2.000000E-04
+7.000000E-02
+1.300000E-03
 0.000000E+00
 0.000000E+00
 0.000000E+00
 0.000000E+00
-8.909862E-01
-1.660072E-01
+1.050675E+00
+2.274991E-01
 0.000000E+00
 0.000000E+00
-2.269580E+00
-1.046926E+00
-2.640000E+00
-1.397800E+00
+2.070821E+00
+8.886068E-01
+2.660000E+00
+1.422000E+00
 0.000000E+00
 0.000000E+00
-3.799000E+01
-2.892451E+02
+3.897000E+01
+3.042635E+02
 0.000000E+00
 0.000000E+00
 0.000000E+00
 0.000000E+00
-3.267964E-01
-2.170374E-02
+4.352932E-01
+4.705717E-02
 0.000000E+00
 0.000000E+00
-8.811378E-01
-1.642094E-01
+1.018668E+00
+2.090017E-01
 0.000000E+00
 0.000000E+00
 0.000000E+00
 0.000000E+00
-4.510000E+00
-4.068900E+00
+4.570000E+00
+4.182700E+00
 0.000000E+00
 0.000000E+00
-4.842000E+01
-4.700146E+02
-6.079426E-02
-8.532151E-04
+4.968000E+01
+4.940534E+02
+6.537406E-02
+1.230788E-03
 0.000000E+00
 0.000000E+00
-1.182446E-01
-3.979568E-03
+8.678070E-02
+2.482037E-03
 0.000000E+00
 0.000000E+00
 0.000000E+00
@@ -57,11 +57,11 @@ tally 1:
 0.000000E+00
 0.000000E+00
 0.000000E+00
-3.500000E+00
-2.455800E+00
-1.158638E-01
-2.993934E-03
-7.390000E+00
-1.097710E+01
-3.126942E-01
-2.185793E-02
+3.290000E+00
+2.178900E+00
+1.610879E-01
+5.883677E-03
+6.530000E+00
+8.828900E+00
+3.151783E-01
+2.052521E-02
diff --git a/tests/test_filter_group_transfer/settings.xml b/tests/test_filter_group_transfer/settings.xml
deleted file mode 100644
index 517637a59f..0000000000
--- a/tests/test_filter_group_transfer/settings.xml
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0"?>
-<settings>
-
-  <eigenvalue>
-    <batches>10</batches>
-    <inactive>5</inactive>
-    <particles>100</particles>
-  </eigenvalue>
-
-  <source>
-    <space type="box">
-      <parameters>
-        -160 -160 -183
-         160  160  183
-      </parameters>
-    </space>
-  </source>
-
-</settings>
diff --git a/tests/test_filter_group_transfer/tallies.xml b/tests/test_filter_group_transfer/tallies.xml
deleted file mode 100644
index 64a6fa5e10..0000000000
--- a/tests/test_filter_group_transfer/tallies.xml
+++ /dev/null
@@ -1,10 +0,0 @@
-<?xml version="1.0"?>
-<tallies>
-
-  <tally id="1">
-    <filter type="energy" bins="0.0 0.253e-6 1.0e-3 1.0 20.0" />
-    <filter type="energyout" bins="0.0 0.253e-6 1.0e-3 1.0 20.0" />
-    <scores>scatter nu-fission</scores>
-  </tally>
-
-</tallies>
\ No newline at end of file
diff --git a/tests/test_filter_group_transfer/test_filter_group_transfer.py b/tests/test_filter_group_transfer/test_filter_group_transfer.py
index 1777db993e..cbea5e0a7f 100644
--- a/tests/test_filter_group_transfer/test_filter_group_transfer.py
+++ b/tests/test_filter_group_transfer/test_filter_group_transfer.py
@@ -1,10 +1,34 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
-from testing_harness import TestHarness
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness, PyAPITestHarness
+import openmc
+
+
+class FilterGroupTransferTestHarness(PyAPITestHarness):
+    def _build_inputs(self):
+        filt1 = openmc.Filter(type='energy',
+                              bins=(0.0, 0.253e-6, 1.0e-3, 1.0, 20.0))
+        filt2 = openmc.Filter(type='energyout',
+                              bins=(0.0, 0.253e-6, 1.0e-3, 1.0, 20.0))
+        tally = openmc.Tally(tally_id=1)
+        tally.add_filter(filt1)
+        tally.add_filter(filt2)
+        tally.add_score('scatter')
+        tally.add_score('nu-fission')
+        self._input_set.tallies = openmc.TalliesFile()
+        self._input_set.tallies.add_tally(tally)
+
+        super(FilterGroupTransferTestHarness, self)._build_inputs()
+
+    def _cleanup(self):
+        super(FilterGroupTransferTestHarness, self)._cleanup()
+        f = os.path.join(os.getcwd(), 'tallies.xml')
+        if os.path.exists(f): os.remove(f)
 
 
 if __name__ == '__main__':
-    harness = TestHarness('statepoint.10.*', True)
+    harness = FilterGroupTransferTestHarness('statepoint.10.*', True)
     harness.main()
diff --git a/tests/test_filter_material/geometry.xml b/tests/test_filter_material/geometry.xml
deleted file mode 100644
index f6f067aadd..0000000000
--- a/tests/test_filter_material/geometry.xml
+++ /dev/null
@@ -1,181 +0,0 @@
-<?xml version="1.0"?>
-<geometry>
-
-  <surface id="1" type="z-cylinder" coeffs="0. 0. 0.41" />
-  <surface id="2" type="z-cylinder" coeffs="0. 0. 0.475" />
-  <surface id="3" type="z-cylinder" coeffs="0. 0. 0.56" />
-  <surface id="4" type="z-cylinder" coeffs="0. 0. 0.62" />
-  <surface id="5" type="z-cylinder" coeffs="0. 0. 187.6" />
-  <surface id="6" type="z-cylinder" coeffs="0. 0. 209.0" />
-  <surface id="7" type="z-cylinder" coeffs="0. 0. 229.0" />
-  <surface id="8" type="z-cylinder" coeffs="0. 0. 249.0" boundary="vacuum" />
-
-  <surface id="31" type="z-plane" coeffs="-229.0" boundary="vacuum" />
-  <surface id="32" type="z-plane" coeffs="-199.0" />
-  <surface id="33" type="z-plane" coeffs="-193.0" />
-  <surface id="34" type="z-plane" coeffs="-183.0" />
-  <surface id="35" type="z-plane" coeffs="0.0" />
-  <surface id="36" type="z-plane" coeffs="183.0" />
-  <surface id="37" type="z-plane" coeffs="203.0" />
-  <surface id="38" type="z-plane" coeffs="215.0" />
-  <surface id="39" type="z-plane" coeffs="223.0" boundary="vacuum" />
-
-  <!-- All geometry on base universe -->
-  <cell id="1"  fill="200"    region="  -6 34 -35" /> <!-- Lower core -->
-  <cell id="2"  fill="201"    region="  -6 35 -36" /> <!-- Upper core -->
-  <cell id="3"  material="8"  region="  -7 31 -32" /> <!-- Lower core plate region -->
-  <cell id="4"  material="9"  region="  -5 32 -33" /> <!-- Bottom nozzle region -->
-  <cell id="5"  material="12" region="  -5 33 -34" /> <!-- Bottom FA region -->
-  <cell id="6"  material="11" region="  -5 36 -37" /> <!-- Top FA region -->
-  <cell id="7"  material="10" region="  -5 37 -38" /> <!-- Top nozzle region -->
-  <cell id="8"  material="7"  region="  -7 38 -39" /> <!-- Upper plate region -->
-  <cell id="9"  material="4"  region="6 -7 32 -38" /> <!-- Downcomer -->
-  <cell id="10" material="5"  region="7 -8 31 -39" /> <!-- RPV -->
-  <cell id="11" material="6"  region="5 -6 32 -34" /> <!-- Bottom of radial reflector -->
-  <cell id="12" material="7"  region="5 -6 36 -38" /> <!-- Top of radial reflector -->
-
-  <!-- Fuel pin, cladding, cold water -->
-  <cell id="21" universe="1" material="1" region="-1"   />
-  <cell id="22" universe="1" material="2" region="1 -2" />
-  <cell id="23" universe="1" material="3" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="24" universe="2" material="3" region="-3"   />
-  <cell id="25" universe="2" material="2" region="3 -4" />
-  <cell id="26" universe="2" material="3" region="4"    />
-
-  <!-- Fuel pin, cladding, hot water -->
-  <cell id="27" universe="3" material="1" region="-1"   />
-  <cell id="28" universe="3" material="2" region="1 -2" />
-  <cell id="29" universe="3" material="4" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="30" universe="4" material="4" region="-3"   />
-  <cell id="31" universe="4" material="2" region="3 -4" />
-  <cell id="32" universe="4" material="4" region="4"    />
-
-  <!-- cell for water assembly (cold) -->
-  <cell id="50" universe="5" material="4" region="34 -35" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="60" universe="6" fill="100"   region="34 -35" />
-
-  <!-- cell for water assembly (hot) -->
-  <cell id="70" universe="7" material="3" region="35 -36" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="80" universe="8" fill="101"   region="35 -36" />
-
-  <!-- Fuel Assembly (Lower Half) -->
-  <lattice id="100">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-    </universes>
-  </lattice>
-
-  <!-- Fuel Assembly (Upper Half) -->
-  <lattice id="101">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Lower Half) -->
-  <lattice id="200">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Upper Half) -->
-  <lattice id="201">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-    </universes>
-  </lattice>
-
-</geometry>
diff --git a/tests/test_filter_material/inputs_true.dat b/tests/test_filter_material/inputs_true.dat
new file mode 100644
index 0000000000..0610b45c44
--- /dev/null
+++ b/tests/test_filter_material/inputs_true.dat
@@ -0,0 +1 @@
+91dd096441a7f01689ed605b7b3322c63a90c4802d73450acd825b715a8163fc892b4971e4b8b0d5a179eb51ad22bcc886f3935e7ab734d0fedebaf679415816
\ No newline at end of file
diff --git a/tests/test_filter_material/materials.xml b/tests/test_filter_material/materials.xml
deleted file mode 100644
index 9c0b74f3f1..0000000000
--- a/tests/test_filter_material/materials.xml
+++ /dev/null
@@ -1,272 +0,0 @@
-<?xml version="1.0"?>
-<materials>
-
-  <default_xs>71c</default_xs>
-
-  <!-- Fuel composition -->
-  <material id="1">
-    <density value="10.062" units="g/cm3" />
-    <nuclide name="U-234"   ao="4.9476e-6" />
-    <nuclide name="U-235"   ao="4.8218e-4" />
-    <nuclide name="U-236"   ao="9.0402e-5" />
-    <nuclide name="U-238"   ao="2.1504e-2" />
-    <nuclide name="Np-237"  ao="7.3733e-6" />
-    <nuclide name="Pu-238"  ao="1.5148e-6" />
-    <nuclide name="Pu-239"  ao="1.3955e-4" />
-    <nuclide name="Pu-240"  ao="3.4405e-5" />
-    <nuclide name="Pu-241"  ao="2.1439e-5" />
-    <nuclide name="Pu-242"  ao="3.7422e-6" />
-    <nuclide name="Am-241"  ao="4.5041e-7" />
-    <nuclide name="Am-242m" ao="9.2301e-9" />
-    <nuclide name="Am-243"  ao="4.7878e-7" />
-    <nuclide name="Cm-242"  ao="1.0485e-7" />
-    <nuclide name="Cm-243"  ao="1.4268e-9" />
-    <nuclide name="Cm-244"  ao="8.8756e-8" />
-    <nuclide name="Cm-245"  ao="3.5285e-9" />
-    <nuclide name="Mo-95"   ao="2.6497e-5" />
-    <nuclide name="Tc-99"   ao="3.2772e-5" />
-    <nuclide name="Ru-101"  ao="3.0742e-5" />
-    <nuclide name="Ru-103"  ao="2.3505e-6" />
-    <nuclide name="Ag-109"  ao="2.0009e-6" />
-    <nuclide name="Xe-135"  ao="1.0801e-8" />
-    <nuclide name="Cs-133"  ao="3.4612e-5" />
-    <nuclide name="Nd-143"  ao="2.6078e-5" />
-    <nuclide name="Nd-145"  ao="1.9898e-5" />
-    <nuclide name="Sm-147"  ao="1.6128e-6" />
-    <nuclide name="Sm-149"  ao="1.1627e-7" />
-    <nuclide name="Sm-150"  ao="7.1727e-6" />
-    <nuclide name="Sm-151"  ao="5.4947e-7" />
-    <nuclide name="Sm-152"  ao="3.0221e-6" />
-    <nuclide name="Eu-153"  ao="2.6209e-6" />
-    <nuclide name="Gd-155"  ao="1.5369e-9" />
-    <nuclide name="O-16"    ao="4.5737e-2" />
-  </material>
-
-  <!-- Cladding composition -->
-  <material id="2">
-    <density value="5.77" units="g/cm3" />
-    <nuclide name="Zr-90" ao="0.5145" />
-    <nuclide name="Zr-91" ao="0.1122" />
-    <nuclide name="Zr-92" ao="0.1715" />
-    <nuclide name="Zr-94" ao="0.1738" />
-    <nuclide name="Zr-96" ao="0.0280" />
-  </material>
-
-  <!-- Cold borated water -->
-  <material id="3">
-    <density value="0.07416" units="atom/b-cm" />
-    <nuclide name="H-1" ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Hot borated water -->
-  <material id="4">
-    <density value="0.06614" units="atom/b-cm" />
-    <nuclide name="H-1"  ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- RPV Composition -->
-  <material id="5">
-    <density value="7.9" units="g/cm3" />
-    <nuclide name="Fe-54"  wo="0.05437098" />
-    <nuclide name="Fe-56"  wo="0.88500663" />
-    <nuclide name="Fe-57"  wo="0.0208008" />
-    <nuclide name="Fe-58"  wo="0.00282159" />
-    <nuclide name="Ni-58"  wo="0.0067198" />
-    <nuclide name="Ni-60"  wo="0.0026776" />
-    <nuclide name="Ni-61"  wo="0.0001183" />
-    <nuclide name="Ni-62"  wo="0.0003835" />
-    <nuclide name="Ni-64"  wo="0.0001008" />
-    <nuclide name="Mn-55"  wo="0.01" />
-    <nuclide name="Mo-92"  wo="0.000849" />
-    <nuclide name="Mo-94"  wo="0.0005418" />
-    <nuclide name="Mo-95"  wo="0.0009438" />
-    <nuclide name="Mo-96"  wo="0.0010002" />
-    <nuclide name="Mo-97"  wo="0.0005796" />
-    <nuclide name="Mo-98"  wo="0.0014814" />
-    <nuclide name="Mo-100" wo="0.0006042" />
-    <nuclide name="Si-28"  wo="0.00367464" />
-    <nuclide name="Si-29"  wo="0.00019336" />
-    <nuclide name="Si-30"  wo="0.000132" />
-    <nuclide name="Cr-50"  wo="0.00010435" />
-    <nuclide name="Cr-52"  wo="0.002092475" />
-    <nuclide name="Cr-53"  wo="0.00024185" />
-    <nuclide name="Cr-54"  wo="6.1325e-05" />
-    <nuclide name="C-Nat"  wo="0.0025" />
-    <nuclide name="Cu-63"  wo="0.0013696" />
-    <nuclide name="Cu-65"  wo="0.0006304" />
-  </material>
-
-  <!-- Lower radial reflector -->
-  <material id="6">
-    <density value="4.32" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0095661" />
-    <nuclide name="O-16"  wo="0.0759107" />
-    <nuclide name="B-10"  wo="3.08409e-5" />
-    <nuclide name="B-11"  wo="1.40499e-4" />
-    <nuclide name="Fe-54" wo="0.035620772088" />
-    <nuclide name="Fe-56" wo="0.579805982228" />
-    <nuclide name="Fe-57" wo="0.01362750048" />
-    <nuclide name="Fe-58" wo="0.001848545204" />
-    <nuclide name="Ni-58" wo="0.055298376566" />
-    <nuclide name="Ni-60" wo="0.022034425592" />
-    <nuclide name="Ni-61" wo="0.000973510811" />
-    <nuclide name="Ni-62" wo="0.003155886695" />
-    <nuclide name="Ni-64" wo="0.000829500336" />
-    <nuclide name="Mn-55" wo="0.0182870" />
-    <nuclide name="Si-28" wo="0.00839976771" />
-    <nuclide name="Si-29" wo="0.00044199679" />
-    <nuclide name="Si-30" wo="0.0003017355" />
-    <nuclide name="Cr-50" wo="0.007251360806" />
-    <nuclide name="Cr-52" wo="0.145407678031" />
-    <nuclide name="Cr-53" wo="0.016806340306" />
-    <nuclide name="Cr-54" wo="0.004261520857" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Upper radial reflector / Top plate region -->
-  <material id="7">
-    <density value="4.28" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0086117" />
-    <nuclide name="O-16"  wo="0.0683369" />
-    <nuclide name="B-10"  wo="2.77638e-5" />
-    <nuclide name="B-11"  wo="1.26481e-4" />
-    <nuclide name="Fe-54" wo="0.035953677186" />
-    <nuclide name="Fe-56" wo="0.585224740891" />
-    <nuclide name="Fe-57" wo="0.01375486056" />
-    <nuclide name="Fe-58" wo="0.001865821363" />
-    <nuclide name="Ni-58" wo="0.055815129186" />
-    <nuclide name="Ni-60" wo="0.022240333032" />
-    <nuclide name="Ni-61" wo="0.000982608081" />
-    <nuclide name="Ni-62" wo="0.003185377845" />
-    <nuclide name="Ni-64" wo="0.000837251856" />
-    <nuclide name="Mn-55" wo="0.0184579" />
-    <nuclide name="Si-28" wo="0.00847831314" />
-    <nuclide name="Si-29" wo="0.00044612986" />
-    <nuclide name="Si-30" wo="0.000304557" />
-    <nuclide name="Cr-50" wo="0.00731912987" />
-    <nuclide name="Cr-52" wo="0.146766614995" />
-    <nuclide name="Cr-53" wo="0.01696340737" />
-    <nuclide name="Cr-54" wo="0.004301347765" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom plate region -->
-  <material id="8">
-    <density value="7.184" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0011505" />
-    <nuclide name="O-16"  wo="0.0091296" />
-    <nuclide name="B-10"  wo="3.70915e-6" />
-    <nuclide name="B-11"  wo="1.68974e-5" />
-    <nuclide name="Fe-54" wo="0.03855611055" />
-    <nuclide name="Fe-56" wo="0.627585036425" />
-    <nuclide name="Fe-57" wo="0.014750478" />
-    <nuclide name="Fe-58" wo="0.002000875025" />
-    <nuclide name="Ni-58" wo="0.059855207342" />
-    <nuclide name="Ni-60" wo="0.023850159704" />
-    <nuclide name="Ni-61" wo="0.001053732407" />
-    <nuclide name="Ni-62" wo="0.003415945715" />
-    <nuclide name="Ni-64" wo="0.000897854832" />
-    <nuclide name="Mn-55" wo="0.0197940" />
-    <nuclide name="Si-28" wo="0.00909197802" />
-    <nuclide name="Si-29" wo="0.00047842098" />
-    <nuclide name="Si-30" wo="0.000326601" />
-    <nuclide name="Cr-50" wo="0.007848910646" />
-    <nuclide name="Cr-52" wo="0.157390026871" />
-    <nuclide name="Cr-53" wo="0.018191270146" />
-    <nuclide name="Cr-54" wo="0.004612692337" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom nozzle region -->
-  <material id="9">
-    <density value="2.53" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0245014" />
-    <nuclide name="O-16"  wo="0.1944274" />
-    <nuclide name="B-10"  wo="7.89917e-5" />
-    <nuclide name="B-11"  wo="3.59854e-4" />
-    <nuclide name="Fe-54" wo="0.030411411144" />
-    <nuclide name="Fe-56" wo="0.495012237964" />
-    <nuclide name="Fe-57" wo="0.01163454624" />
-    <nuclide name="Fe-58" wo="0.001578204652" />
-    <nuclide name="Ni-58" wo="0.047211231662" />
-    <nuclide name="Ni-60" wo="0.018811987544" />
-    <nuclide name="Ni-61" wo="0.000831139127" />
-    <nuclide name="Ni-62" wo="0.002694352115" />
-    <nuclide name="Ni-64" wo="0.000708189552" />
-    <nuclide name="Mn-55" wo="0.0156126" />
-    <nuclide name="Si-28" wo="0.007171335558" />
-    <nuclide name="Si-29" wo="0.000377356542" />
-    <nuclide name="Si-30" wo="0.0002576079" />
-    <nuclide name="Cr-50" wo="0.006190885148" />
-    <nuclide name="Cr-52" wo="0.124142524198" />
-    <nuclide name="Cr-53" wo="0.014348496148" />
-    <nuclide name="Cr-54" wo="0.003638294506" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top nozzle region -->
-  <material id="10">
-    <density value="1.746" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0358870" />
-    <nuclide name="O-16"  wo="0.2847761" />
-    <nuclide name="B-10"  wo="1.15699e-4" />
-    <nuclide name="B-11"  wo="5.27075e-4" />
-    <nuclide name="Fe-54" wo="0.02644016154" />
-    <nuclide name="Fe-56" wo="0.43037146399" />
-    <nuclide name="Fe-57" wo="0.0101152584" />
-    <nuclide name="Fe-58" wo="0.00137211607" />
-    <nuclide name="Ni-58" wo="0.04104621835" />
-    <nuclide name="Ni-60" wo="0.0163554502" />
-    <nuclide name="Ni-61" wo="0.000722605975" />
-    <nuclide name="Ni-62" wo="0.002342513875" />
-    <nuclide name="Ni-64" wo="0.0006157116" />
-    <nuclide name="Mn-55" wo="0.0135739" />
-    <nuclide name="Si-28" wo="0.006234853554" />
-    <nuclide name="Si-29" wo="0.000328078746" />
-    <nuclide name="Si-30" wo="0.0002239677" />
-    <nuclide name="Cr-50" wo="0.005382452306" />
-    <nuclide name="Cr-52" wo="0.107931450781" />
-    <nuclide name="Cr-53" wo="0.012474806806" />
-    <nuclide name="Cr-54" wo="0.003163190107" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top of Fuel Assemblies -->
-  <material id="11">
-    <density value="3.044" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0162913" />
-    <nuclide name="O-16"  wo="0.1292776" />
-    <nuclide name="B-10"  wo="5.25228e-5" />
-    <nuclide name="B-11"  wo="2.39272e-4" />
-    <nuclide name="Zr-90" wo="0.43313403903" />
-    <nuclide name="Zr-91" wo="0.09549277374" />
-    <nuclide name="Zr-92" wo="0.14759527104" />
-    <nuclide name="Zr-94" wo="0.15280552077" />
-    <nuclide name="Zr-96" wo="0.02511169542" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom of Fuel Assemblies -->
-  <material id="12">
-    <density value="1.762" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0292856" />
-    <nuclide name="O-16"  wo="0.2323919" />
-    <nuclide name="B-10"  wo="9.44159e-5" />
-    <nuclide name="B-11"  wo="4.30120e-4" />
-    <nuclide name="Zr-90" wo="0.3741373658" />
-    <nuclide name="Zr-91" wo="0.0824858164" />
-    <nuclide name="Zr-92" wo="0.1274914944" />
-    <nuclide name="Zr-94" wo="0.1319920622" />
-    <nuclide name="Zr-96" wo="0.0216912612" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-</materials>
diff --git a/tests/test_filter_material/results_true.dat b/tests/test_filter_material/results_true.dat
index 86e1e943ce..d2b23e2901 100644
--- a/tests/test_filter_material/results_true.dat
+++ b/tests/test_filter_material/results_true.dat
@@ -1,11 +1,11 @@
 k-combined:
-1.005983E+00 2.248579E-02
+9.903196E-01 4.279617E-02
 tally 1:
-2.923791E+01
-1.711686E+02
-6.753642E+00
-9.145065E+00
-4.921142E+01
-5.186991E+02
-4.731999E+01
-4.905260E+02
+2.868239E+01
+1.648549E+02
+6.779424E+00
+9.202676E+00
+6.446222E+01
+8.387204E+02
+3.367496E+01
+2.349072E+02
diff --git a/tests/test_filter_material/settings.xml b/tests/test_filter_material/settings.xml
deleted file mode 100644
index 517637a59f..0000000000
--- a/tests/test_filter_material/settings.xml
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0"?>
-<settings>
-
-  <eigenvalue>
-    <batches>10</batches>
-    <inactive>5</inactive>
-    <particles>100</particles>
-  </eigenvalue>
-
-  <source>
-    <space type="box">
-      <parameters>
-        -160 -160 -183
-         160  160  183
-      </parameters>
-    </space>
-  </source>
-
-</settings>
diff --git a/tests/test_filter_material/tallies.xml b/tests/test_filter_material/tallies.xml
deleted file mode 100644
index 4b8d1ce8f0..0000000000
--- a/tests/test_filter_material/tallies.xml
+++ /dev/null
@@ -1,9 +0,0 @@
-<?xml version="1.0"?>
-<tallies>
-
-  <tally id="1">
-    <filter type="material" bins="1 2 3 4" />
-    <scores>total</scores>
-  </tally>
-
-</tallies>
\ No newline at end of file
diff --git a/tests/test_filter_material/test_filter_material.py b/tests/test_filter_material/test_filter_material.py
index 1777db993e..8e42d8c9a2 100644
--- a/tests/test_filter_material/test_filter_material.py
+++ b/tests/test_filter_material/test_filter_material.py
@@ -1,10 +1,29 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
-from testing_harness import TestHarness
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness, PyAPITestHarness
+import openmc
+
+
+class FilterMaterialTestHarness(PyAPITestHarness):
+    def _build_inputs(self):
+        filt = openmc.Filter(type='material', bins=(1, 2, 3, 4))
+        tally = openmc.Tally(tally_id=1)
+        tally.add_filter(filt)
+        tally.add_score('total')
+        self._input_set.tallies = openmc.TalliesFile()
+        self._input_set.tallies.add_tally(tally)
+
+        super(FilterMaterialTestHarness, self)._build_inputs()
+
+    def _cleanup(self):
+        super(FilterMaterialTestHarness, self)._cleanup()
+        f = os.path.join(os.getcwd(), 'tallies.xml')
+        if os.path.exists(f): os.remove(f)
 
 
 if __name__ == '__main__':
-    harness = TestHarness('statepoint.10.*', True)
+    harness = FilterMaterialTestHarness('statepoint.10.*', True)
     harness.main()
diff --git a/tests/test_filter_mesh_2d/test_filter_mesh_2d.py b/tests/test_filter_mesh_2d/test_filter_mesh_2d.py
index 1777db993e..ed6addec45 100644
--- a/tests/test_filter_mesh_2d/test_filter_mesh_2d.py
+++ b/tests/test_filter_mesh_2d/test_filter_mesh_2d.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_filter_mesh_3d/test_filter_mesh_3d.py b/tests/test_filter_mesh_3d/test_filter_mesh_3d.py
index 1777db993e..ed6addec45 100644
--- a/tests/test_filter_mesh_3d/test_filter_mesh_3d.py
+++ b/tests/test_filter_mesh_3d/test_filter_mesh_3d.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_filter_universe/geometry.xml b/tests/test_filter_universe/geometry.xml
deleted file mode 100644
index f6f067aadd..0000000000
--- a/tests/test_filter_universe/geometry.xml
+++ /dev/null
@@ -1,181 +0,0 @@
-<?xml version="1.0"?>
-<geometry>
-
-  <surface id="1" type="z-cylinder" coeffs="0. 0. 0.41" />
-  <surface id="2" type="z-cylinder" coeffs="0. 0. 0.475" />
-  <surface id="3" type="z-cylinder" coeffs="0. 0. 0.56" />
-  <surface id="4" type="z-cylinder" coeffs="0. 0. 0.62" />
-  <surface id="5" type="z-cylinder" coeffs="0. 0. 187.6" />
-  <surface id="6" type="z-cylinder" coeffs="0. 0. 209.0" />
-  <surface id="7" type="z-cylinder" coeffs="0. 0. 229.0" />
-  <surface id="8" type="z-cylinder" coeffs="0. 0. 249.0" boundary="vacuum" />
-
-  <surface id="31" type="z-plane" coeffs="-229.0" boundary="vacuum" />
-  <surface id="32" type="z-plane" coeffs="-199.0" />
-  <surface id="33" type="z-plane" coeffs="-193.0" />
-  <surface id="34" type="z-plane" coeffs="-183.0" />
-  <surface id="35" type="z-plane" coeffs="0.0" />
-  <surface id="36" type="z-plane" coeffs="183.0" />
-  <surface id="37" type="z-plane" coeffs="203.0" />
-  <surface id="38" type="z-plane" coeffs="215.0" />
-  <surface id="39" type="z-plane" coeffs="223.0" boundary="vacuum" />
-
-  <!-- All geometry on base universe -->
-  <cell id="1"  fill="200"    region="  -6 34 -35" /> <!-- Lower core -->
-  <cell id="2"  fill="201"    region="  -6 35 -36" /> <!-- Upper core -->
-  <cell id="3"  material="8"  region="  -7 31 -32" /> <!-- Lower core plate region -->
-  <cell id="4"  material="9"  region="  -5 32 -33" /> <!-- Bottom nozzle region -->
-  <cell id="5"  material="12" region="  -5 33 -34" /> <!-- Bottom FA region -->
-  <cell id="6"  material="11" region="  -5 36 -37" /> <!-- Top FA region -->
-  <cell id="7"  material="10" region="  -5 37 -38" /> <!-- Top nozzle region -->
-  <cell id="8"  material="7"  region="  -7 38 -39" /> <!-- Upper plate region -->
-  <cell id="9"  material="4"  region="6 -7 32 -38" /> <!-- Downcomer -->
-  <cell id="10" material="5"  region="7 -8 31 -39" /> <!-- RPV -->
-  <cell id="11" material="6"  region="5 -6 32 -34" /> <!-- Bottom of radial reflector -->
-  <cell id="12" material="7"  region="5 -6 36 -38" /> <!-- Top of radial reflector -->
-
-  <!-- Fuel pin, cladding, cold water -->
-  <cell id="21" universe="1" material="1" region="-1"   />
-  <cell id="22" universe="1" material="2" region="1 -2" />
-  <cell id="23" universe="1" material="3" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="24" universe="2" material="3" region="-3"   />
-  <cell id="25" universe="2" material="2" region="3 -4" />
-  <cell id="26" universe="2" material="3" region="4"    />
-
-  <!-- Fuel pin, cladding, hot water -->
-  <cell id="27" universe="3" material="1" region="-1"   />
-  <cell id="28" universe="3" material="2" region="1 -2" />
-  <cell id="29" universe="3" material="4" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="30" universe="4" material="4" region="-3"   />
-  <cell id="31" universe="4" material="2" region="3 -4" />
-  <cell id="32" universe="4" material="4" region="4"    />
-
-  <!-- cell for water assembly (cold) -->
-  <cell id="50" universe="5" material="4" region="34 -35" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="60" universe="6" fill="100"   region="34 -35" />
-
-  <!-- cell for water assembly (hot) -->
-  <cell id="70" universe="7" material="3" region="35 -36" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="80" universe="8" fill="101"   region="35 -36" />
-
-  <!-- Fuel Assembly (Lower Half) -->
-  <lattice id="100">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-    </universes>
-  </lattice>
-
-  <!-- Fuel Assembly (Upper Half) -->
-  <lattice id="101">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Lower Half) -->
-  <lattice id="200">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Upper Half) -->
-  <lattice id="201">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-    </universes>
-  </lattice>
-
-</geometry>
diff --git a/tests/test_filter_universe/inputs_true.dat b/tests/test_filter_universe/inputs_true.dat
new file mode 100644
index 0000000000..cf1c7db55b
--- /dev/null
+++ b/tests/test_filter_universe/inputs_true.dat
@@ -0,0 +1 @@
+f3dc4c28827ca9035d2d1a39f4adef794f0e27b8c95776485e419b9610aefc6c268e6a1d5889d8170ec9400fc3a4a52bc69cd94e5056078aee7405e0bc62bad5
\ No newline at end of file
diff --git a/tests/test_filter_universe/materials.xml b/tests/test_filter_universe/materials.xml
deleted file mode 100644
index 9c0b74f3f1..0000000000
--- a/tests/test_filter_universe/materials.xml
+++ /dev/null
@@ -1,272 +0,0 @@
-<?xml version="1.0"?>
-<materials>
-
-  <default_xs>71c</default_xs>
-
-  <!-- Fuel composition -->
-  <material id="1">
-    <density value="10.062" units="g/cm3" />
-    <nuclide name="U-234"   ao="4.9476e-6" />
-    <nuclide name="U-235"   ao="4.8218e-4" />
-    <nuclide name="U-236"   ao="9.0402e-5" />
-    <nuclide name="U-238"   ao="2.1504e-2" />
-    <nuclide name="Np-237"  ao="7.3733e-6" />
-    <nuclide name="Pu-238"  ao="1.5148e-6" />
-    <nuclide name="Pu-239"  ao="1.3955e-4" />
-    <nuclide name="Pu-240"  ao="3.4405e-5" />
-    <nuclide name="Pu-241"  ao="2.1439e-5" />
-    <nuclide name="Pu-242"  ao="3.7422e-6" />
-    <nuclide name="Am-241"  ao="4.5041e-7" />
-    <nuclide name="Am-242m" ao="9.2301e-9" />
-    <nuclide name="Am-243"  ao="4.7878e-7" />
-    <nuclide name="Cm-242"  ao="1.0485e-7" />
-    <nuclide name="Cm-243"  ao="1.4268e-9" />
-    <nuclide name="Cm-244"  ao="8.8756e-8" />
-    <nuclide name="Cm-245"  ao="3.5285e-9" />
-    <nuclide name="Mo-95"   ao="2.6497e-5" />
-    <nuclide name="Tc-99"   ao="3.2772e-5" />
-    <nuclide name="Ru-101"  ao="3.0742e-5" />
-    <nuclide name="Ru-103"  ao="2.3505e-6" />
-    <nuclide name="Ag-109"  ao="2.0009e-6" />
-    <nuclide name="Xe-135"  ao="1.0801e-8" />
-    <nuclide name="Cs-133"  ao="3.4612e-5" />
-    <nuclide name="Nd-143"  ao="2.6078e-5" />
-    <nuclide name="Nd-145"  ao="1.9898e-5" />
-    <nuclide name="Sm-147"  ao="1.6128e-6" />
-    <nuclide name="Sm-149"  ao="1.1627e-7" />
-    <nuclide name="Sm-150"  ao="7.1727e-6" />
-    <nuclide name="Sm-151"  ao="5.4947e-7" />
-    <nuclide name="Sm-152"  ao="3.0221e-6" />
-    <nuclide name="Eu-153"  ao="2.6209e-6" />
-    <nuclide name="Gd-155"  ao="1.5369e-9" />
-    <nuclide name="O-16"    ao="4.5737e-2" />
-  </material>
-
-  <!-- Cladding composition -->
-  <material id="2">
-    <density value="5.77" units="g/cm3" />
-    <nuclide name="Zr-90" ao="0.5145" />
-    <nuclide name="Zr-91" ao="0.1122" />
-    <nuclide name="Zr-92" ao="0.1715" />
-    <nuclide name="Zr-94" ao="0.1738" />
-    <nuclide name="Zr-96" ao="0.0280" />
-  </material>
-
-  <!-- Cold borated water -->
-  <material id="3">
-    <density value="0.07416" units="atom/b-cm" />
-    <nuclide name="H-1" ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Hot borated water -->
-  <material id="4">
-    <density value="0.06614" units="atom/b-cm" />
-    <nuclide name="H-1"  ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- RPV Composition -->
-  <material id="5">
-    <density value="7.9" units="g/cm3" />
-    <nuclide name="Fe-54"  wo="0.05437098" />
-    <nuclide name="Fe-56"  wo="0.88500663" />
-    <nuclide name="Fe-57"  wo="0.0208008" />
-    <nuclide name="Fe-58"  wo="0.00282159" />
-    <nuclide name="Ni-58"  wo="0.0067198" />
-    <nuclide name="Ni-60"  wo="0.0026776" />
-    <nuclide name="Ni-61"  wo="0.0001183" />
-    <nuclide name="Ni-62"  wo="0.0003835" />
-    <nuclide name="Ni-64"  wo="0.0001008" />
-    <nuclide name="Mn-55"  wo="0.01" />
-    <nuclide name="Mo-92"  wo="0.000849" />
-    <nuclide name="Mo-94"  wo="0.0005418" />
-    <nuclide name="Mo-95"  wo="0.0009438" />
-    <nuclide name="Mo-96"  wo="0.0010002" />
-    <nuclide name="Mo-97"  wo="0.0005796" />
-    <nuclide name="Mo-98"  wo="0.0014814" />
-    <nuclide name="Mo-100" wo="0.0006042" />
-    <nuclide name="Si-28"  wo="0.00367464" />
-    <nuclide name="Si-29"  wo="0.00019336" />
-    <nuclide name="Si-30"  wo="0.000132" />
-    <nuclide name="Cr-50"  wo="0.00010435" />
-    <nuclide name="Cr-52"  wo="0.002092475" />
-    <nuclide name="Cr-53"  wo="0.00024185" />
-    <nuclide name="Cr-54"  wo="6.1325e-05" />
-    <nuclide name="C-Nat"  wo="0.0025" />
-    <nuclide name="Cu-63"  wo="0.0013696" />
-    <nuclide name="Cu-65"  wo="0.0006304" />
-  </material>
-
-  <!-- Lower radial reflector -->
-  <material id="6">
-    <density value="4.32" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0095661" />
-    <nuclide name="O-16"  wo="0.0759107" />
-    <nuclide name="B-10"  wo="3.08409e-5" />
-    <nuclide name="B-11"  wo="1.40499e-4" />
-    <nuclide name="Fe-54" wo="0.035620772088" />
-    <nuclide name="Fe-56" wo="0.579805982228" />
-    <nuclide name="Fe-57" wo="0.01362750048" />
-    <nuclide name="Fe-58" wo="0.001848545204" />
-    <nuclide name="Ni-58" wo="0.055298376566" />
-    <nuclide name="Ni-60" wo="0.022034425592" />
-    <nuclide name="Ni-61" wo="0.000973510811" />
-    <nuclide name="Ni-62" wo="0.003155886695" />
-    <nuclide name="Ni-64" wo="0.000829500336" />
-    <nuclide name="Mn-55" wo="0.0182870" />
-    <nuclide name="Si-28" wo="0.00839976771" />
-    <nuclide name="Si-29" wo="0.00044199679" />
-    <nuclide name="Si-30" wo="0.0003017355" />
-    <nuclide name="Cr-50" wo="0.007251360806" />
-    <nuclide name="Cr-52" wo="0.145407678031" />
-    <nuclide name="Cr-53" wo="0.016806340306" />
-    <nuclide name="Cr-54" wo="0.004261520857" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Upper radial reflector / Top plate region -->
-  <material id="7">
-    <density value="4.28" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0086117" />
-    <nuclide name="O-16"  wo="0.0683369" />
-    <nuclide name="B-10"  wo="2.77638e-5" />
-    <nuclide name="B-11"  wo="1.26481e-4" />
-    <nuclide name="Fe-54" wo="0.035953677186" />
-    <nuclide name="Fe-56" wo="0.585224740891" />
-    <nuclide name="Fe-57" wo="0.01375486056" />
-    <nuclide name="Fe-58" wo="0.001865821363" />
-    <nuclide name="Ni-58" wo="0.055815129186" />
-    <nuclide name="Ni-60" wo="0.022240333032" />
-    <nuclide name="Ni-61" wo="0.000982608081" />
-    <nuclide name="Ni-62" wo="0.003185377845" />
-    <nuclide name="Ni-64" wo="0.000837251856" />
-    <nuclide name="Mn-55" wo="0.0184579" />
-    <nuclide name="Si-28" wo="0.00847831314" />
-    <nuclide name="Si-29" wo="0.00044612986" />
-    <nuclide name="Si-30" wo="0.000304557" />
-    <nuclide name="Cr-50" wo="0.00731912987" />
-    <nuclide name="Cr-52" wo="0.146766614995" />
-    <nuclide name="Cr-53" wo="0.01696340737" />
-    <nuclide name="Cr-54" wo="0.004301347765" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom plate region -->
-  <material id="8">
-    <density value="7.184" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0011505" />
-    <nuclide name="O-16"  wo="0.0091296" />
-    <nuclide name="B-10"  wo="3.70915e-6" />
-    <nuclide name="B-11"  wo="1.68974e-5" />
-    <nuclide name="Fe-54" wo="0.03855611055" />
-    <nuclide name="Fe-56" wo="0.627585036425" />
-    <nuclide name="Fe-57" wo="0.014750478" />
-    <nuclide name="Fe-58" wo="0.002000875025" />
-    <nuclide name="Ni-58" wo="0.059855207342" />
-    <nuclide name="Ni-60" wo="0.023850159704" />
-    <nuclide name="Ni-61" wo="0.001053732407" />
-    <nuclide name="Ni-62" wo="0.003415945715" />
-    <nuclide name="Ni-64" wo="0.000897854832" />
-    <nuclide name="Mn-55" wo="0.0197940" />
-    <nuclide name="Si-28" wo="0.00909197802" />
-    <nuclide name="Si-29" wo="0.00047842098" />
-    <nuclide name="Si-30" wo="0.000326601" />
-    <nuclide name="Cr-50" wo="0.007848910646" />
-    <nuclide name="Cr-52" wo="0.157390026871" />
-    <nuclide name="Cr-53" wo="0.018191270146" />
-    <nuclide name="Cr-54" wo="0.004612692337" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom nozzle region -->
-  <material id="9">
-    <density value="2.53" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0245014" />
-    <nuclide name="O-16"  wo="0.1944274" />
-    <nuclide name="B-10"  wo="7.89917e-5" />
-    <nuclide name="B-11"  wo="3.59854e-4" />
-    <nuclide name="Fe-54" wo="0.030411411144" />
-    <nuclide name="Fe-56" wo="0.495012237964" />
-    <nuclide name="Fe-57" wo="0.01163454624" />
-    <nuclide name="Fe-58" wo="0.001578204652" />
-    <nuclide name="Ni-58" wo="0.047211231662" />
-    <nuclide name="Ni-60" wo="0.018811987544" />
-    <nuclide name="Ni-61" wo="0.000831139127" />
-    <nuclide name="Ni-62" wo="0.002694352115" />
-    <nuclide name="Ni-64" wo="0.000708189552" />
-    <nuclide name="Mn-55" wo="0.0156126" />
-    <nuclide name="Si-28" wo="0.007171335558" />
-    <nuclide name="Si-29" wo="0.000377356542" />
-    <nuclide name="Si-30" wo="0.0002576079" />
-    <nuclide name="Cr-50" wo="0.006190885148" />
-    <nuclide name="Cr-52" wo="0.124142524198" />
-    <nuclide name="Cr-53" wo="0.014348496148" />
-    <nuclide name="Cr-54" wo="0.003638294506" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top nozzle region -->
-  <material id="10">
-    <density value="1.746" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0358870" />
-    <nuclide name="O-16"  wo="0.2847761" />
-    <nuclide name="B-10"  wo="1.15699e-4" />
-    <nuclide name="B-11"  wo="5.27075e-4" />
-    <nuclide name="Fe-54" wo="0.02644016154" />
-    <nuclide name="Fe-56" wo="0.43037146399" />
-    <nuclide name="Fe-57" wo="0.0101152584" />
-    <nuclide name="Fe-58" wo="0.00137211607" />
-    <nuclide name="Ni-58" wo="0.04104621835" />
-    <nuclide name="Ni-60" wo="0.0163554502" />
-    <nuclide name="Ni-61" wo="0.000722605975" />
-    <nuclide name="Ni-62" wo="0.002342513875" />
-    <nuclide name="Ni-64" wo="0.0006157116" />
-    <nuclide name="Mn-55" wo="0.0135739" />
-    <nuclide name="Si-28" wo="0.006234853554" />
-    <nuclide name="Si-29" wo="0.000328078746" />
-    <nuclide name="Si-30" wo="0.0002239677" />
-    <nuclide name="Cr-50" wo="0.005382452306" />
-    <nuclide name="Cr-52" wo="0.107931450781" />
-    <nuclide name="Cr-53" wo="0.012474806806" />
-    <nuclide name="Cr-54" wo="0.003163190107" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top of Fuel Assemblies -->
-  <material id="11">
-    <density value="3.044" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0162913" />
-    <nuclide name="O-16"  wo="0.1292776" />
-    <nuclide name="B-10"  wo="5.25228e-5" />
-    <nuclide name="B-11"  wo="2.39272e-4" />
-    <nuclide name="Zr-90" wo="0.43313403903" />
-    <nuclide name="Zr-91" wo="0.09549277374" />
-    <nuclide name="Zr-92" wo="0.14759527104" />
-    <nuclide name="Zr-94" wo="0.15280552077" />
-    <nuclide name="Zr-96" wo="0.02511169542" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom of Fuel Assemblies -->
-  <material id="12">
-    <density value="1.762" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0292856" />
-    <nuclide name="O-16"  wo="0.2323919" />
-    <nuclide name="B-10"  wo="9.44159e-5" />
-    <nuclide name="B-11"  wo="4.30120e-4" />
-    <nuclide name="Zr-90" wo="0.3741373658" />
-    <nuclide name="Zr-91" wo="0.0824858164" />
-    <nuclide name="Zr-92" wo="0.1274914944" />
-    <nuclide name="Zr-94" wo="0.1319920622" />
-    <nuclide name="Zr-96" wo="0.0216912612" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-</materials>
diff --git a/tests/test_filter_universe/results_true.dat b/tests/test_filter_universe/results_true.dat
index 856d97d593..f71c4d2c21 100644
--- a/tests/test_filter_universe/results_true.dat
+++ b/tests/test_filter_universe/results_true.dat
@@ -1,11 +1,11 @@
 k-combined:
-1.005983E+00 2.248579E-02
+9.903196E-01 4.279617E-02
 tally 1:
-5.803437E+01
-7.324822E+02
-7.168085E+00
-1.101286E+01
-5.815302E+01
-7.373019E+02
-5.778029E+00
-7.558661E+00
+7.510505E+01
+1.143811E+03
+8.792943E+00
+1.575416E+01
+4.214462E+01
+3.642975E+02
+4.335157E+00
+3.864423E+00
diff --git a/tests/test_filter_universe/settings.xml b/tests/test_filter_universe/settings.xml
deleted file mode 100644
index 517637a59f..0000000000
--- a/tests/test_filter_universe/settings.xml
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0"?>
-<settings>
-
-  <eigenvalue>
-    <batches>10</batches>
-    <inactive>5</inactive>
-    <particles>100</particles>
-  </eigenvalue>
-
-  <source>
-    <space type="box">
-      <parameters>
-        -160 -160 -183
-         160  160  183
-      </parameters>
-    </space>
-  </source>
-
-</settings>
diff --git a/tests/test_filter_universe/tallies.xml b/tests/test_filter_universe/tallies.xml
deleted file mode 100644
index bcf16f53a6..0000000000
--- a/tests/test_filter_universe/tallies.xml
+++ /dev/null
@@ -1,9 +0,0 @@
-<?xml version="1.0"?>
-<tallies>
-
-  <tally id="1">
-    <filter type="universe" bins="1 2 3 4" />
-    <scores>total</scores>
-  </tally>
-
-</tallies>
\ No newline at end of file
diff --git a/tests/test_filter_universe/test_filter_universe.py b/tests/test_filter_universe/test_filter_universe.py
index 1777db993e..00dd166196 100644
--- a/tests/test_filter_universe/test_filter_universe.py
+++ b/tests/test_filter_universe/test_filter_universe.py
@@ -1,10 +1,29 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
-from testing_harness import TestHarness
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness, PyAPITestHarness
+import openmc
+
+
+class FilterUniverseTestHarness(PyAPITestHarness):
+    def _build_inputs(self):
+        filt = openmc.Filter(type='universe', bins=(1, 2, 3, 4))
+        tally = openmc.Tally(tally_id=1)
+        tally.add_filter(filt)
+        tally.add_score('total')
+        self._input_set.tallies = openmc.TalliesFile()
+        self._input_set.tallies.add_tally(tally)
+
+        super(FilterUniverseTestHarness, self)._build_inputs()
+
+    def _cleanup(self):
+        super(FilterUniverseTestHarness, self)._cleanup()
+        f = os.path.join(os.getcwd(), 'tallies.xml')
+        if os.path.exists(f): os.remove(f)
 
 
 if __name__ == '__main__':
-    harness = TestHarness('statepoint.10.*', True)
+    harness = FilterUniverseTestHarness('statepoint.10.*', True)
     harness.main()
diff --git a/tests/test_fixed_source/test_fixed_source.py b/tests/test_fixed_source/test_fixed_source.py
index c3bd34856d..12dbb8d769 100644
--- a/tests/test_fixed_source/test_fixed_source.py
+++ b/tests/test_fixed_source/test_fixed_source.py
@@ -3,9 +3,10 @@
 import glob
 import os
 import sys
-
-sys.path.insert(0, '..')
-from testing_harness import *
+import numpy as np
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness
+from openmc.statepoint import StatePoint
 
 
 class FixedSourceTestHarness(TestHarness):
diff --git a/tests/test_infinite_cell/test_infinite_cell.py b/tests/test_infinite_cell/test_infinite_cell.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_infinite_cell/test_infinite_cell.py
+++ b/tests/test_infinite_cell/test_infinite_cell.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_lattice/test_lattice.py b/tests/test_lattice/test_lattice.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_lattice/test_lattice.py
+++ b/tests/test_lattice/test_lattice.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_lattice_hex/test_lattice_hex.py b/tests/test_lattice_hex/test_lattice_hex.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_lattice_hex/test_lattice_hex.py
+++ b/tests/test_lattice_hex/test_lattice_hex.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_lattice_mixed/test_lattice_mixed.py b/tests/test_lattice_mixed/test_lattice_mixed.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_lattice_mixed/test_lattice_mixed.py
+++ b/tests/test_lattice_mixed/test_lattice_mixed.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_lattice_multiple/test_lattice_multiple.py b/tests/test_lattice_multiple/test_lattice_multiple.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_lattice_multiple/test_lattice_multiple.py
+++ b/tests/test_lattice_multiple/test_lattice_multiple.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_many_scores/test_many_scores.py b/tests/test_many_scores/test_many_scores.py
index 66bfe3dfa7..88c3bdfb3d 100644
--- a/tests/test_many_scores/test_many_scores.py
+++ b/tests/test_many_scores/test_many_scores.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_natural_element/test_natural_element.py b/tests/test_natural_element/test_natural_element.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_natural_element/test_natural_element.py
+++ b/tests/test_natural_element/test_natural_element.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_output/test_output.py b/tests/test_output/test_output.py
index b37b7d07b2..8e36ead808 100644
--- a/tests/test_output/test_output.py
+++ b/tests/test_output/test_output.py
@@ -3,9 +3,8 @@
 import glob
 import os
 import sys
-
-sys.path.insert(0, '..')
-from testing_harness import *
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness
 
 
 class OutputTestHarness(TestHarness):
diff --git a/tests/test_particle_restart_eigval/test_particle_restart_eigval.py b/tests/test_particle_restart_eigval/test_particle_restart_eigval.py
index a9f4563d0a..139cb2b9f5 100644
--- a/tests/test_particle_restart_eigval/test_particle_restart_eigval.py
+++ b/tests/test_particle_restart_eigval/test_particle_restart_eigval.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import ParticleRestartTestHarness
 
 
diff --git a/tests/test_particle_restart_fixed/test_particle_restart_fixed.py b/tests/test_particle_restart_fixed/test_particle_restart_fixed.py
index 385a429407..5af7454894 100644
--- a/tests/test_particle_restart_fixed/test_particle_restart_fixed.py
+++ b/tests/test_particle_restart_fixed/test_particle_restart_fixed.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import ParticleRestartTestHarness
 
 
diff --git a/tests/test_plot_background/test_plot_background.py b/tests/test_plot_background/test_plot_background.py
index 49cdacb05c..7890eca19d 100644
--- a/tests/test_plot_background/test_plot_background.py
+++ b/tests/test_plot_background/test_plot_background.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import PlotTestHarness
 
 
diff --git a/tests/test_plot_basis/test_plot_basis.py b/tests/test_plot_basis/test_plot_basis.py
index 85e30557d2..d45479e256 100644
--- a/tests/test_plot_basis/test_plot_basis.py
+++ b/tests/test_plot_basis/test_plot_basis.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import PlotTestHarness
 
 
diff --git a/tests/test_plot_colspec/test_plot_colspec.py b/tests/test_plot_colspec/test_plot_colspec.py
index 49cdacb05c..7890eca19d 100644
--- a/tests/test_plot_colspec/test_plot_colspec.py
+++ b/tests/test_plot_colspec/test_plot_colspec.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import PlotTestHarness
 
 
diff --git a/tests/test_plot_mask/test_plot_mask.py b/tests/test_plot_mask/test_plot_mask.py
index 85e30557d2..d45479e256 100644
--- a/tests/test_plot_mask/test_plot_mask.py
+++ b/tests/test_plot_mask/test_plot_mask.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import PlotTestHarness
 
 
diff --git a/tests/test_ptables_off/test_ptables_off.py b/tests/test_ptables_off/test_ptables_off.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_ptables_off/test_ptables_off.py
+++ b/tests/test_ptables_off/test_ptables_off.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_reflective_cone/test_reflective_cone.py b/tests/test_reflective_cone/test_reflective_cone.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_reflective_cone/test_reflective_cone.py
+++ b/tests/test_reflective_cone/test_reflective_cone.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_reflective_cylinder/test_reflective_cylinder.py b/tests/test_reflective_cylinder/test_reflective_cylinder.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_reflective_cylinder/test_reflective_cylinder.py
+++ b/tests/test_reflective_cylinder/test_reflective_cylinder.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_reflective_plane/test_reflective_plane.py b/tests/test_reflective_plane/test_reflective_plane.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_reflective_plane/test_reflective_plane.py
+++ b/tests/test_reflective_plane/test_reflective_plane.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_reflective_sphere/test_reflective_sphere.py b/tests/test_reflective_sphere/test_reflective_sphere.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_reflective_sphere/test_reflective_sphere.py
+++ b/tests/test_reflective_sphere/test_reflective_sphere.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_resonance_scattering/test_resonance_scattering.py b/tests/test_resonance_scattering/test_resonance_scattering.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_resonance_scattering/test_resonance_scattering.py
+++ b/tests/test_resonance_scattering/test_resonance_scattering.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_rotation/test_rotation.py b/tests/test_rotation/test_rotation.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_rotation/test_rotation.py
+++ b/tests/test_rotation/test_rotation.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_salphabeta/test_salphabeta.py b/tests/test_salphabeta/test_salphabeta.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_salphabeta/test_salphabeta.py
+++ b/tests/test_salphabeta/test_salphabeta.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_salphabeta_multiple/test_salphabeta_multiple.py b/tests/test_salphabeta_multiple/test_salphabeta_multiple.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_salphabeta_multiple/test_salphabeta_multiple.py
+++ b/tests/test_salphabeta_multiple/test_salphabeta_multiple.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_score_MT/geometry.xml b/tests/test_score_MT/geometry.xml
deleted file mode 100644
index f6f067aadd..0000000000
--- a/tests/test_score_MT/geometry.xml
+++ /dev/null
@@ -1,181 +0,0 @@
-<?xml version="1.0"?>
-<geometry>
-
-  <surface id="1" type="z-cylinder" coeffs="0. 0. 0.41" />
-  <surface id="2" type="z-cylinder" coeffs="0. 0. 0.475" />
-  <surface id="3" type="z-cylinder" coeffs="0. 0. 0.56" />
-  <surface id="4" type="z-cylinder" coeffs="0. 0. 0.62" />
-  <surface id="5" type="z-cylinder" coeffs="0. 0. 187.6" />
-  <surface id="6" type="z-cylinder" coeffs="0. 0. 209.0" />
-  <surface id="7" type="z-cylinder" coeffs="0. 0. 229.0" />
-  <surface id="8" type="z-cylinder" coeffs="0. 0. 249.0" boundary="vacuum" />
-
-  <surface id="31" type="z-plane" coeffs="-229.0" boundary="vacuum" />
-  <surface id="32" type="z-plane" coeffs="-199.0" />
-  <surface id="33" type="z-plane" coeffs="-193.0" />
-  <surface id="34" type="z-plane" coeffs="-183.0" />
-  <surface id="35" type="z-plane" coeffs="0.0" />
-  <surface id="36" type="z-plane" coeffs="183.0" />
-  <surface id="37" type="z-plane" coeffs="203.0" />
-  <surface id="38" type="z-plane" coeffs="215.0" />
-  <surface id="39" type="z-plane" coeffs="223.0" boundary="vacuum" />
-
-  <!-- All geometry on base universe -->
-  <cell id="1"  fill="200"    region="  -6 34 -35" /> <!-- Lower core -->
-  <cell id="2"  fill="201"    region="  -6 35 -36" /> <!-- Upper core -->
-  <cell id="3"  material="8"  region="  -7 31 -32" /> <!-- Lower core plate region -->
-  <cell id="4"  material="9"  region="  -5 32 -33" /> <!-- Bottom nozzle region -->
-  <cell id="5"  material="12" region="  -5 33 -34" /> <!-- Bottom FA region -->
-  <cell id="6"  material="11" region="  -5 36 -37" /> <!-- Top FA region -->
-  <cell id="7"  material="10" region="  -5 37 -38" /> <!-- Top nozzle region -->
-  <cell id="8"  material="7"  region="  -7 38 -39" /> <!-- Upper plate region -->
-  <cell id="9"  material="4"  region="6 -7 32 -38" /> <!-- Downcomer -->
-  <cell id="10" material="5"  region="7 -8 31 -39" /> <!-- RPV -->
-  <cell id="11" material="6"  region="5 -6 32 -34" /> <!-- Bottom of radial reflector -->
-  <cell id="12" material="7"  region="5 -6 36 -38" /> <!-- Top of radial reflector -->
-
-  <!-- Fuel pin, cladding, cold water -->
-  <cell id="21" universe="1" material="1" region="-1"   />
-  <cell id="22" universe="1" material="2" region="1 -2" />
-  <cell id="23" universe="1" material="3" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="24" universe="2" material="3" region="-3"   />
-  <cell id="25" universe="2" material="2" region="3 -4" />
-  <cell id="26" universe="2" material="3" region="4"    />
-
-  <!-- Fuel pin, cladding, hot water -->
-  <cell id="27" universe="3" material="1" region="-1"   />
-  <cell id="28" universe="3" material="2" region="1 -2" />
-  <cell id="29" universe="3" material="4" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="30" universe="4" material="4" region="-3"   />
-  <cell id="31" universe="4" material="2" region="3 -4" />
-  <cell id="32" universe="4" material="4" region="4"    />
-
-  <!-- cell for water assembly (cold) -->
-  <cell id="50" universe="5" material="4" region="34 -35" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="60" universe="6" fill="100"   region="34 -35" />
-
-  <!-- cell for water assembly (hot) -->
-  <cell id="70" universe="7" material="3" region="35 -36" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="80" universe="8" fill="101"   region="35 -36" />
-
-  <!-- Fuel Assembly (Lower Half) -->
-  <lattice id="100">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-    </universes>
-  </lattice>
-
-  <!-- Fuel Assembly (Upper Half) -->
-  <lattice id="101">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Lower Half) -->
-  <lattice id="200">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Upper Half) -->
-  <lattice id="201">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-    </universes>
-  </lattice>
-
-</geometry>
diff --git a/tests/test_score_MT/inputs_true.dat b/tests/test_score_MT/inputs_true.dat
new file mode 100644
index 0000000000..7b56862ea3
--- /dev/null
+++ b/tests/test_score_MT/inputs_true.dat
@@ -0,0 +1 @@
+6ba3ebe9d50584343b012b7a935a0f75b8366659600d4de050a8e4e48405f8da36682e8ab5f495f69b646fc72e176755c0a3540f235806c73d5ebc4fc67db107
\ No newline at end of file
diff --git a/tests/test_score_MT/materials.xml b/tests/test_score_MT/materials.xml
deleted file mode 100644
index 9c0b74f3f1..0000000000
--- a/tests/test_score_MT/materials.xml
+++ /dev/null
@@ -1,272 +0,0 @@
-<?xml version="1.0"?>
-<materials>
-
-  <default_xs>71c</default_xs>
-
-  <!-- Fuel composition -->
-  <material id="1">
-    <density value="10.062" units="g/cm3" />
-    <nuclide name="U-234"   ao="4.9476e-6" />
-    <nuclide name="U-235"   ao="4.8218e-4" />
-    <nuclide name="U-236"   ao="9.0402e-5" />
-    <nuclide name="U-238"   ao="2.1504e-2" />
-    <nuclide name="Np-237"  ao="7.3733e-6" />
-    <nuclide name="Pu-238"  ao="1.5148e-6" />
-    <nuclide name="Pu-239"  ao="1.3955e-4" />
-    <nuclide name="Pu-240"  ao="3.4405e-5" />
-    <nuclide name="Pu-241"  ao="2.1439e-5" />
-    <nuclide name="Pu-242"  ao="3.7422e-6" />
-    <nuclide name="Am-241"  ao="4.5041e-7" />
-    <nuclide name="Am-242m" ao="9.2301e-9" />
-    <nuclide name="Am-243"  ao="4.7878e-7" />
-    <nuclide name="Cm-242"  ao="1.0485e-7" />
-    <nuclide name="Cm-243"  ao="1.4268e-9" />
-    <nuclide name="Cm-244"  ao="8.8756e-8" />
-    <nuclide name="Cm-245"  ao="3.5285e-9" />
-    <nuclide name="Mo-95"   ao="2.6497e-5" />
-    <nuclide name="Tc-99"   ao="3.2772e-5" />
-    <nuclide name="Ru-101"  ao="3.0742e-5" />
-    <nuclide name="Ru-103"  ao="2.3505e-6" />
-    <nuclide name="Ag-109"  ao="2.0009e-6" />
-    <nuclide name="Xe-135"  ao="1.0801e-8" />
-    <nuclide name="Cs-133"  ao="3.4612e-5" />
-    <nuclide name="Nd-143"  ao="2.6078e-5" />
-    <nuclide name="Nd-145"  ao="1.9898e-5" />
-    <nuclide name="Sm-147"  ao="1.6128e-6" />
-    <nuclide name="Sm-149"  ao="1.1627e-7" />
-    <nuclide name="Sm-150"  ao="7.1727e-6" />
-    <nuclide name="Sm-151"  ao="5.4947e-7" />
-    <nuclide name="Sm-152"  ao="3.0221e-6" />
-    <nuclide name="Eu-153"  ao="2.6209e-6" />
-    <nuclide name="Gd-155"  ao="1.5369e-9" />
-    <nuclide name="O-16"    ao="4.5737e-2" />
-  </material>
-
-  <!-- Cladding composition -->
-  <material id="2">
-    <density value="5.77" units="g/cm3" />
-    <nuclide name="Zr-90" ao="0.5145" />
-    <nuclide name="Zr-91" ao="0.1122" />
-    <nuclide name="Zr-92" ao="0.1715" />
-    <nuclide name="Zr-94" ao="0.1738" />
-    <nuclide name="Zr-96" ao="0.0280" />
-  </material>
-
-  <!-- Cold borated water -->
-  <material id="3">
-    <density value="0.07416" units="atom/b-cm" />
-    <nuclide name="H-1" ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Hot borated water -->
-  <material id="4">
-    <density value="0.06614" units="atom/b-cm" />
-    <nuclide name="H-1"  ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- RPV Composition -->
-  <material id="5">
-    <density value="7.9" units="g/cm3" />
-    <nuclide name="Fe-54"  wo="0.05437098" />
-    <nuclide name="Fe-56"  wo="0.88500663" />
-    <nuclide name="Fe-57"  wo="0.0208008" />
-    <nuclide name="Fe-58"  wo="0.00282159" />
-    <nuclide name="Ni-58"  wo="0.0067198" />
-    <nuclide name="Ni-60"  wo="0.0026776" />
-    <nuclide name="Ni-61"  wo="0.0001183" />
-    <nuclide name="Ni-62"  wo="0.0003835" />
-    <nuclide name="Ni-64"  wo="0.0001008" />
-    <nuclide name="Mn-55"  wo="0.01" />
-    <nuclide name="Mo-92"  wo="0.000849" />
-    <nuclide name="Mo-94"  wo="0.0005418" />
-    <nuclide name="Mo-95"  wo="0.0009438" />
-    <nuclide name="Mo-96"  wo="0.0010002" />
-    <nuclide name="Mo-97"  wo="0.0005796" />
-    <nuclide name="Mo-98"  wo="0.0014814" />
-    <nuclide name="Mo-100" wo="0.0006042" />
-    <nuclide name="Si-28"  wo="0.00367464" />
-    <nuclide name="Si-29"  wo="0.00019336" />
-    <nuclide name="Si-30"  wo="0.000132" />
-    <nuclide name="Cr-50"  wo="0.00010435" />
-    <nuclide name="Cr-52"  wo="0.002092475" />
-    <nuclide name="Cr-53"  wo="0.00024185" />
-    <nuclide name="Cr-54"  wo="6.1325e-05" />
-    <nuclide name="C-Nat"  wo="0.0025" />
-    <nuclide name="Cu-63"  wo="0.0013696" />
-    <nuclide name="Cu-65"  wo="0.0006304" />
-  </material>
-
-  <!-- Lower radial reflector -->
-  <material id="6">
-    <density value="4.32" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0095661" />
-    <nuclide name="O-16"  wo="0.0759107" />
-    <nuclide name="B-10"  wo="3.08409e-5" />
-    <nuclide name="B-11"  wo="1.40499e-4" />
-    <nuclide name="Fe-54" wo="0.035620772088" />
-    <nuclide name="Fe-56" wo="0.579805982228" />
-    <nuclide name="Fe-57" wo="0.01362750048" />
-    <nuclide name="Fe-58" wo="0.001848545204" />
-    <nuclide name="Ni-58" wo="0.055298376566" />
-    <nuclide name="Ni-60" wo="0.022034425592" />
-    <nuclide name="Ni-61" wo="0.000973510811" />
-    <nuclide name="Ni-62" wo="0.003155886695" />
-    <nuclide name="Ni-64" wo="0.000829500336" />
-    <nuclide name="Mn-55" wo="0.0182870" />
-    <nuclide name="Si-28" wo="0.00839976771" />
-    <nuclide name="Si-29" wo="0.00044199679" />
-    <nuclide name="Si-30" wo="0.0003017355" />
-    <nuclide name="Cr-50" wo="0.007251360806" />
-    <nuclide name="Cr-52" wo="0.145407678031" />
-    <nuclide name="Cr-53" wo="0.016806340306" />
-    <nuclide name="Cr-54" wo="0.004261520857" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Upper radial reflector / Top plate region -->
-  <material id="7">
-    <density value="4.28" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0086117" />
-    <nuclide name="O-16"  wo="0.0683369" />
-    <nuclide name="B-10"  wo="2.77638e-5" />
-    <nuclide name="B-11"  wo="1.26481e-4" />
-    <nuclide name="Fe-54" wo="0.035953677186" />
-    <nuclide name="Fe-56" wo="0.585224740891" />
-    <nuclide name="Fe-57" wo="0.01375486056" />
-    <nuclide name="Fe-58" wo="0.001865821363" />
-    <nuclide name="Ni-58" wo="0.055815129186" />
-    <nuclide name="Ni-60" wo="0.022240333032" />
-    <nuclide name="Ni-61" wo="0.000982608081" />
-    <nuclide name="Ni-62" wo="0.003185377845" />
-    <nuclide name="Ni-64" wo="0.000837251856" />
-    <nuclide name="Mn-55" wo="0.0184579" />
-    <nuclide name="Si-28" wo="0.00847831314" />
-    <nuclide name="Si-29" wo="0.00044612986" />
-    <nuclide name="Si-30" wo="0.000304557" />
-    <nuclide name="Cr-50" wo="0.00731912987" />
-    <nuclide name="Cr-52" wo="0.146766614995" />
-    <nuclide name="Cr-53" wo="0.01696340737" />
-    <nuclide name="Cr-54" wo="0.004301347765" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom plate region -->
-  <material id="8">
-    <density value="7.184" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0011505" />
-    <nuclide name="O-16"  wo="0.0091296" />
-    <nuclide name="B-10"  wo="3.70915e-6" />
-    <nuclide name="B-11"  wo="1.68974e-5" />
-    <nuclide name="Fe-54" wo="0.03855611055" />
-    <nuclide name="Fe-56" wo="0.627585036425" />
-    <nuclide name="Fe-57" wo="0.014750478" />
-    <nuclide name="Fe-58" wo="0.002000875025" />
-    <nuclide name="Ni-58" wo="0.059855207342" />
-    <nuclide name="Ni-60" wo="0.023850159704" />
-    <nuclide name="Ni-61" wo="0.001053732407" />
-    <nuclide name="Ni-62" wo="0.003415945715" />
-    <nuclide name="Ni-64" wo="0.000897854832" />
-    <nuclide name="Mn-55" wo="0.0197940" />
-    <nuclide name="Si-28" wo="0.00909197802" />
-    <nuclide name="Si-29" wo="0.00047842098" />
-    <nuclide name="Si-30" wo="0.000326601" />
-    <nuclide name="Cr-50" wo="0.007848910646" />
-    <nuclide name="Cr-52" wo="0.157390026871" />
-    <nuclide name="Cr-53" wo="0.018191270146" />
-    <nuclide name="Cr-54" wo="0.004612692337" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom nozzle region -->
-  <material id="9">
-    <density value="2.53" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0245014" />
-    <nuclide name="O-16"  wo="0.1944274" />
-    <nuclide name="B-10"  wo="7.89917e-5" />
-    <nuclide name="B-11"  wo="3.59854e-4" />
-    <nuclide name="Fe-54" wo="0.030411411144" />
-    <nuclide name="Fe-56" wo="0.495012237964" />
-    <nuclide name="Fe-57" wo="0.01163454624" />
-    <nuclide name="Fe-58" wo="0.001578204652" />
-    <nuclide name="Ni-58" wo="0.047211231662" />
-    <nuclide name="Ni-60" wo="0.018811987544" />
-    <nuclide name="Ni-61" wo="0.000831139127" />
-    <nuclide name="Ni-62" wo="0.002694352115" />
-    <nuclide name="Ni-64" wo="0.000708189552" />
-    <nuclide name="Mn-55" wo="0.0156126" />
-    <nuclide name="Si-28" wo="0.007171335558" />
-    <nuclide name="Si-29" wo="0.000377356542" />
-    <nuclide name="Si-30" wo="0.0002576079" />
-    <nuclide name="Cr-50" wo="0.006190885148" />
-    <nuclide name="Cr-52" wo="0.124142524198" />
-    <nuclide name="Cr-53" wo="0.014348496148" />
-    <nuclide name="Cr-54" wo="0.003638294506" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top nozzle region -->
-  <material id="10">
-    <density value="1.746" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0358870" />
-    <nuclide name="O-16"  wo="0.2847761" />
-    <nuclide name="B-10"  wo="1.15699e-4" />
-    <nuclide name="B-11"  wo="5.27075e-4" />
-    <nuclide name="Fe-54" wo="0.02644016154" />
-    <nuclide name="Fe-56" wo="0.43037146399" />
-    <nuclide name="Fe-57" wo="0.0101152584" />
-    <nuclide name="Fe-58" wo="0.00137211607" />
-    <nuclide name="Ni-58" wo="0.04104621835" />
-    <nuclide name="Ni-60" wo="0.0163554502" />
-    <nuclide name="Ni-61" wo="0.000722605975" />
-    <nuclide name="Ni-62" wo="0.002342513875" />
-    <nuclide name="Ni-64" wo="0.0006157116" />
-    <nuclide name="Mn-55" wo="0.0135739" />
-    <nuclide name="Si-28" wo="0.006234853554" />
-    <nuclide name="Si-29" wo="0.000328078746" />
-    <nuclide name="Si-30" wo="0.0002239677" />
-    <nuclide name="Cr-50" wo="0.005382452306" />
-    <nuclide name="Cr-52" wo="0.107931450781" />
-    <nuclide name="Cr-53" wo="0.012474806806" />
-    <nuclide name="Cr-54" wo="0.003163190107" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top of Fuel Assemblies -->
-  <material id="11">
-    <density value="3.044" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0162913" />
-    <nuclide name="O-16"  wo="0.1292776" />
-    <nuclide name="B-10"  wo="5.25228e-5" />
-    <nuclide name="B-11"  wo="2.39272e-4" />
-    <nuclide name="Zr-90" wo="0.43313403903" />
-    <nuclide name="Zr-91" wo="0.09549277374" />
-    <nuclide name="Zr-92" wo="0.14759527104" />
-    <nuclide name="Zr-94" wo="0.15280552077" />
-    <nuclide name="Zr-96" wo="0.02511169542" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom of Fuel Assemblies -->
-  <material id="12">
-    <density value="1.762" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0292856" />
-    <nuclide name="O-16"  wo="0.2323919" />
-    <nuclide name="B-10"  wo="9.44159e-5" />
-    <nuclide name="B-11"  wo="4.30120e-4" />
-    <nuclide name="Zr-90" wo="0.3741373658" />
-    <nuclide name="Zr-91" wo="0.0824858164" />
-    <nuclide name="Zr-92" wo="0.1274914944" />
-    <nuclide name="Zr-94" wo="0.1319920622" />
-    <nuclide name="Zr-96" wo="0.0216912612" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-</materials>
diff --git a/tests/test_score_MT/results_true.dat b/tests/test_score_MT/results_true.dat
index 4b1c1af26c..44656963f0 100644
--- a/tests/test_score_MT/results_true.dat
+++ b/tests/test_score_MT/results_true.dat
@@ -1,5 +1,5 @@
 k-combined:
-1.005983E+00 2.248579E-02
+9.903196E-01 4.279617E-02
 tally 1:
 0.000000E+00
 0.000000E+00
@@ -9,30 +9,30 @@ tally 1:
 0.000000E+00
 0.000000E+00
 0.000000E+00
-6.261679E-03
-2.310296E-05
-6.261679E-03
-2.310296E-05
-3.434524E-01
-2.482946E-02
-1.059004E+00
-2.432555E-01
-3.828838E-04
-9.365499E-08
-3.828838E-04
-9.365499E-08
-3.226036E-02
-2.229037E-04
-1.450446E-02
-4.382852E-05
-8.650696E-08
-7.483455E-15
-8.650696E-08
-7.483455E-15
-7.312640E-05
-2.080857E-09
-6.101318E-02
-8.452067E-04
+1.538090E-03
+1.381456E-06
+1.538090E-03
+1.381456E-06
+3.974412E-01
+3.209809E-02
+1.373550E+00
+3.796357E-01
+5.252455E-06
+2.290531E-11
+5.252455E-06
+2.290531E-11
+3.359792E-02
+2.267331E-04
+2.459115E-02
+1.233078E-04
+0.000000E+00
+0.000000E+00
+0.000000E+00
+0.000000E+00
+7.004005E-05
+1.748739E-09
+8.104946E-02
+1.395618E-03
 tally 2:
 0.000000E+00
 0.000000E+00
@@ -46,16 +46,16 @@ tally 2:
 0.000000E+00
 0.000000E+00
 0.000000E+00
-3.000000E-01
-2.440000E-02
+2.000000E-01
+9.000000E-03
 0.000000E+00
 0.000000E+00
 0.000000E+00
 0.000000E+00
 0.000000E+00
 0.000000E+00
-4.000000E-02
-6.000000E-04
+2.000000E-02
+2.000000E-04
 0.000000E+00
 0.000000E+00
 0.000000E+00
@@ -75,27 +75,27 @@ tally 3:
 0.000000E+00
 0.000000E+00
 0.000000E+00
-5.724026E-03
-1.684945E-05
-5.724026E-03
-1.684945E-05
-3.250298E-01
-2.370870E-02
-1.083784E+00
-2.568556E-01
-4.449887E-05
-1.980149E-09
-4.449887E-05
-1.980149E-09
-3.526275E-02
-2.863085E-04
-1.417358E-02
-4.375519E-05
+1.408027E-03
+1.849607E-06
+1.408027E-03
+1.849607E-06
+3.946436E-01
+3.166261E-02
+1.288136E+00
+3.382059E-01
+2.179241E-05
+4.749090E-10
+2.179241E-05
+4.749090E-10
+3.146594E-02
+2.159308E-04
+4.278352E-02
+4.094478E-04
 0.000000E+00
 0.000000E+00
 0.000000E+00
 0.000000E+00
-5.106469E-05
-8.605176E-10
-6.204277E-02
-8.555398E-04
+1.736514E-04
+1.245171E-08
+7.989710E-02
+1.377742E-03
diff --git a/tests/test_score_MT/settings.xml b/tests/test_score_MT/settings.xml
deleted file mode 100644
index 517637a59f..0000000000
--- a/tests/test_score_MT/settings.xml
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0"?>
-<settings>
-
-  <eigenvalue>
-    <batches>10</batches>
-    <inactive>5</inactive>
-    <particles>100</particles>
-  </eigenvalue>
-
-  <source>
-    <space type="box">
-      <parameters>
-        -160 -160 -183
-         160  160  183
-      </parameters>
-    </space>
-  </source>
-
-</settings>
diff --git a/tests/test_score_MT/tallies.xml b/tests/test_score_MT/tallies.xml
deleted file mode 100644
index 5e66ae929e..0000000000
--- a/tests/test_score_MT/tallies.xml
+++ /dev/null
@@ -1,21 +0,0 @@
-<?xml version="1.0"?>
-<tallies>
-
-  <tally id="1">
-    <filter type="cell" bins="10 21 22 23" />
-    <scores>n2n 16 51 102</scores>
-  </tally>
-
-  <tally id="2">
-    <filter type="cell" bins="10 21 22 23" />
-    <scores>n2n 16 51 102</scores>
-    <estimator>analog</estimator>
-  </tally>
-
-  <tally id="3">
-    <filter type="cell" bins="10 21 22 23" />
-    <scores>n2n 16 51 102</scores>
-    <estimator>collision</estimator>
-  </tally>
-
-</tallies>
diff --git a/tests/test_score_MT/test_score_MT.py b/tests/test_score_MT/test_score_MT.py
index 1777db993e..dae86d418c 100644
--- a/tests/test_score_MT/test_score_MT.py
+++ b/tests/test_score_MT/test_score_MT.py
@@ -1,10 +1,35 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
-from testing_harness import TestHarness
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness, PyAPITestHarness
+import openmc
+
+
+class ScoreMTTestHarness(PyAPITestHarness):
+    def _build_inputs(self):
+        filt = openmc.Filter(type='cell', bins=(10, 21, 22, 23))
+        tallies = [openmc.Tally(tally_id=i) for i in range(1, 4)]
+        [t.add_filter(filt) for t in tallies]
+        [t.add_score('n2n') for t in tallies]
+        [t.add_score('16') for t in tallies]
+        [t.add_score('51') for t in tallies]
+        [t.add_score('102') for t in tallies]
+        tallies[0].estimator = 'tracklength'
+        tallies[1].estimator = 'analog'
+        tallies[2].estimator = 'collision'
+        self._input_set.tallies = openmc.TalliesFile()
+        [self._input_set.tallies.add_tally(t) for t in tallies]
+
+        super(ScoreMTTestHarness, self)._build_inputs()
+
+    def _cleanup(self):
+        super(ScoreMTTestHarness, self)._cleanup()
+        f = os.path.join(os.getcwd(), 'tallies.xml')
+        if os.path.exists(f): os.remove(f)
 
 
 if __name__ == '__main__':
-    harness = TestHarness('statepoint.10.*', True)
+    harness = ScoreMTTestHarness('statepoint.10.*', True)
     harness.main()
diff --git a/tests/test_score_absorption/geometry.xml b/tests/test_score_absorption/geometry.xml
deleted file mode 100644
index f6f067aadd..0000000000
--- a/tests/test_score_absorption/geometry.xml
+++ /dev/null
@@ -1,181 +0,0 @@
-<?xml version="1.0"?>
-<geometry>
-
-  <surface id="1" type="z-cylinder" coeffs="0. 0. 0.41" />
-  <surface id="2" type="z-cylinder" coeffs="0. 0. 0.475" />
-  <surface id="3" type="z-cylinder" coeffs="0. 0. 0.56" />
-  <surface id="4" type="z-cylinder" coeffs="0. 0. 0.62" />
-  <surface id="5" type="z-cylinder" coeffs="0. 0. 187.6" />
-  <surface id="6" type="z-cylinder" coeffs="0. 0. 209.0" />
-  <surface id="7" type="z-cylinder" coeffs="0. 0. 229.0" />
-  <surface id="8" type="z-cylinder" coeffs="0. 0. 249.0" boundary="vacuum" />
-
-  <surface id="31" type="z-plane" coeffs="-229.0" boundary="vacuum" />
-  <surface id="32" type="z-plane" coeffs="-199.0" />
-  <surface id="33" type="z-plane" coeffs="-193.0" />
-  <surface id="34" type="z-plane" coeffs="-183.0" />
-  <surface id="35" type="z-plane" coeffs="0.0" />
-  <surface id="36" type="z-plane" coeffs="183.0" />
-  <surface id="37" type="z-plane" coeffs="203.0" />
-  <surface id="38" type="z-plane" coeffs="215.0" />
-  <surface id="39" type="z-plane" coeffs="223.0" boundary="vacuum" />
-
-  <!-- All geometry on base universe -->
-  <cell id="1"  fill="200"    region="  -6 34 -35" /> <!-- Lower core -->
-  <cell id="2"  fill="201"    region="  -6 35 -36" /> <!-- Upper core -->
-  <cell id="3"  material="8"  region="  -7 31 -32" /> <!-- Lower core plate region -->
-  <cell id="4"  material="9"  region="  -5 32 -33" /> <!-- Bottom nozzle region -->
-  <cell id="5"  material="12" region="  -5 33 -34" /> <!-- Bottom FA region -->
-  <cell id="6"  material="11" region="  -5 36 -37" /> <!-- Top FA region -->
-  <cell id="7"  material="10" region="  -5 37 -38" /> <!-- Top nozzle region -->
-  <cell id="8"  material="7"  region="  -7 38 -39" /> <!-- Upper plate region -->
-  <cell id="9"  material="4"  region="6 -7 32 -38" /> <!-- Downcomer -->
-  <cell id="10" material="5"  region="7 -8 31 -39" /> <!-- RPV -->
-  <cell id="11" material="6"  region="5 -6 32 -34" /> <!-- Bottom of radial reflector -->
-  <cell id="12" material="7"  region="5 -6 36 -38" /> <!-- Top of radial reflector -->
-
-  <!-- Fuel pin, cladding, cold water -->
-  <cell id="21" universe="1" material="1" region="-1"   />
-  <cell id="22" universe="1" material="2" region="1 -2" />
-  <cell id="23" universe="1" material="3" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="24" universe="2" material="3" region="-3"   />
-  <cell id="25" universe="2" material="2" region="3 -4" />
-  <cell id="26" universe="2" material="3" region="4"    />
-
-  <!-- Fuel pin, cladding, hot water -->
-  <cell id="27" universe="3" material="1" region="-1"   />
-  <cell id="28" universe="3" material="2" region="1 -2" />
-  <cell id="29" universe="3" material="4" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="30" universe="4" material="4" region="-3"   />
-  <cell id="31" universe="4" material="2" region="3 -4" />
-  <cell id="32" universe="4" material="4" region="4"    />
-
-  <!-- cell for water assembly (cold) -->
-  <cell id="50" universe="5" material="4" region="34 -35" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="60" universe="6" fill="100"   region="34 -35" />
-
-  <!-- cell for water assembly (hot) -->
-  <cell id="70" universe="7" material="3" region="35 -36" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="80" universe="8" fill="101"   region="35 -36" />
-
-  <!-- Fuel Assembly (Lower Half) -->
-  <lattice id="100">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-    </universes>
-  </lattice>
-
-  <!-- Fuel Assembly (Upper Half) -->
-  <lattice id="101">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Lower Half) -->
-  <lattice id="200">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Upper Half) -->
-  <lattice id="201">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-    </universes>
-  </lattice>
-
-</geometry>
diff --git a/tests/test_score_absorption/inputs_true.dat b/tests/test_score_absorption/inputs_true.dat
new file mode 100644
index 0000000000..ad2d1f40ea
--- /dev/null
+++ b/tests/test_score_absorption/inputs_true.dat
@@ -0,0 +1 @@
+a2be808e033014c9d748a0ec503ab6ad498f6b70250c8136bfcb9dc8f5580e69fc0bc1c6acab428c139edf64f51237ba07495b0275a19f509bf3bd20fa298e4e
\ No newline at end of file
diff --git a/tests/test_score_absorption/materials.xml b/tests/test_score_absorption/materials.xml
deleted file mode 100644
index 9c0b74f3f1..0000000000
--- a/tests/test_score_absorption/materials.xml
+++ /dev/null
@@ -1,272 +0,0 @@
-<?xml version="1.0"?>
-<materials>
-
-  <default_xs>71c</default_xs>
-
-  <!-- Fuel composition -->
-  <material id="1">
-    <density value="10.062" units="g/cm3" />
-    <nuclide name="U-234"   ao="4.9476e-6" />
-    <nuclide name="U-235"   ao="4.8218e-4" />
-    <nuclide name="U-236"   ao="9.0402e-5" />
-    <nuclide name="U-238"   ao="2.1504e-2" />
-    <nuclide name="Np-237"  ao="7.3733e-6" />
-    <nuclide name="Pu-238"  ao="1.5148e-6" />
-    <nuclide name="Pu-239"  ao="1.3955e-4" />
-    <nuclide name="Pu-240"  ao="3.4405e-5" />
-    <nuclide name="Pu-241"  ao="2.1439e-5" />
-    <nuclide name="Pu-242"  ao="3.7422e-6" />
-    <nuclide name="Am-241"  ao="4.5041e-7" />
-    <nuclide name="Am-242m" ao="9.2301e-9" />
-    <nuclide name="Am-243"  ao="4.7878e-7" />
-    <nuclide name="Cm-242"  ao="1.0485e-7" />
-    <nuclide name="Cm-243"  ao="1.4268e-9" />
-    <nuclide name="Cm-244"  ao="8.8756e-8" />
-    <nuclide name="Cm-245"  ao="3.5285e-9" />
-    <nuclide name="Mo-95"   ao="2.6497e-5" />
-    <nuclide name="Tc-99"   ao="3.2772e-5" />
-    <nuclide name="Ru-101"  ao="3.0742e-5" />
-    <nuclide name="Ru-103"  ao="2.3505e-6" />
-    <nuclide name="Ag-109"  ao="2.0009e-6" />
-    <nuclide name="Xe-135"  ao="1.0801e-8" />
-    <nuclide name="Cs-133"  ao="3.4612e-5" />
-    <nuclide name="Nd-143"  ao="2.6078e-5" />
-    <nuclide name="Nd-145"  ao="1.9898e-5" />
-    <nuclide name="Sm-147"  ao="1.6128e-6" />
-    <nuclide name="Sm-149"  ao="1.1627e-7" />
-    <nuclide name="Sm-150"  ao="7.1727e-6" />
-    <nuclide name="Sm-151"  ao="5.4947e-7" />
-    <nuclide name="Sm-152"  ao="3.0221e-6" />
-    <nuclide name="Eu-153"  ao="2.6209e-6" />
-    <nuclide name="Gd-155"  ao="1.5369e-9" />
-    <nuclide name="O-16"    ao="4.5737e-2" />
-  </material>
-
-  <!-- Cladding composition -->
-  <material id="2">
-    <density value="5.77" units="g/cm3" />
-    <nuclide name="Zr-90" ao="0.5145" />
-    <nuclide name="Zr-91" ao="0.1122" />
-    <nuclide name="Zr-92" ao="0.1715" />
-    <nuclide name="Zr-94" ao="0.1738" />
-    <nuclide name="Zr-96" ao="0.0280" />
-  </material>
-
-  <!-- Cold borated water -->
-  <material id="3">
-    <density value="0.07416" units="atom/b-cm" />
-    <nuclide name="H-1" ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Hot borated water -->
-  <material id="4">
-    <density value="0.06614" units="atom/b-cm" />
-    <nuclide name="H-1"  ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- RPV Composition -->
-  <material id="5">
-    <density value="7.9" units="g/cm3" />
-    <nuclide name="Fe-54"  wo="0.05437098" />
-    <nuclide name="Fe-56"  wo="0.88500663" />
-    <nuclide name="Fe-57"  wo="0.0208008" />
-    <nuclide name="Fe-58"  wo="0.00282159" />
-    <nuclide name="Ni-58"  wo="0.0067198" />
-    <nuclide name="Ni-60"  wo="0.0026776" />
-    <nuclide name="Ni-61"  wo="0.0001183" />
-    <nuclide name="Ni-62"  wo="0.0003835" />
-    <nuclide name="Ni-64"  wo="0.0001008" />
-    <nuclide name="Mn-55"  wo="0.01" />
-    <nuclide name="Mo-92"  wo="0.000849" />
-    <nuclide name="Mo-94"  wo="0.0005418" />
-    <nuclide name="Mo-95"  wo="0.0009438" />
-    <nuclide name="Mo-96"  wo="0.0010002" />
-    <nuclide name="Mo-97"  wo="0.0005796" />
-    <nuclide name="Mo-98"  wo="0.0014814" />
-    <nuclide name="Mo-100" wo="0.0006042" />
-    <nuclide name="Si-28"  wo="0.00367464" />
-    <nuclide name="Si-29"  wo="0.00019336" />
-    <nuclide name="Si-30"  wo="0.000132" />
-    <nuclide name="Cr-50"  wo="0.00010435" />
-    <nuclide name="Cr-52"  wo="0.002092475" />
-    <nuclide name="Cr-53"  wo="0.00024185" />
-    <nuclide name="Cr-54"  wo="6.1325e-05" />
-    <nuclide name="C-Nat"  wo="0.0025" />
-    <nuclide name="Cu-63"  wo="0.0013696" />
-    <nuclide name="Cu-65"  wo="0.0006304" />
-  </material>
-
-  <!-- Lower radial reflector -->
-  <material id="6">
-    <density value="4.32" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0095661" />
-    <nuclide name="O-16"  wo="0.0759107" />
-    <nuclide name="B-10"  wo="3.08409e-5" />
-    <nuclide name="B-11"  wo="1.40499e-4" />
-    <nuclide name="Fe-54" wo="0.035620772088" />
-    <nuclide name="Fe-56" wo="0.579805982228" />
-    <nuclide name="Fe-57" wo="0.01362750048" />
-    <nuclide name="Fe-58" wo="0.001848545204" />
-    <nuclide name="Ni-58" wo="0.055298376566" />
-    <nuclide name="Ni-60" wo="0.022034425592" />
-    <nuclide name="Ni-61" wo="0.000973510811" />
-    <nuclide name="Ni-62" wo="0.003155886695" />
-    <nuclide name="Ni-64" wo="0.000829500336" />
-    <nuclide name="Mn-55" wo="0.0182870" />
-    <nuclide name="Si-28" wo="0.00839976771" />
-    <nuclide name="Si-29" wo="0.00044199679" />
-    <nuclide name="Si-30" wo="0.0003017355" />
-    <nuclide name="Cr-50" wo="0.007251360806" />
-    <nuclide name="Cr-52" wo="0.145407678031" />
-    <nuclide name="Cr-53" wo="0.016806340306" />
-    <nuclide name="Cr-54" wo="0.004261520857" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Upper radial reflector / Top plate region -->
-  <material id="7">
-    <density value="4.28" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0086117" />
-    <nuclide name="O-16"  wo="0.0683369" />
-    <nuclide name="B-10"  wo="2.77638e-5" />
-    <nuclide name="B-11"  wo="1.26481e-4" />
-    <nuclide name="Fe-54" wo="0.035953677186" />
-    <nuclide name="Fe-56" wo="0.585224740891" />
-    <nuclide name="Fe-57" wo="0.01375486056" />
-    <nuclide name="Fe-58" wo="0.001865821363" />
-    <nuclide name="Ni-58" wo="0.055815129186" />
-    <nuclide name="Ni-60" wo="0.022240333032" />
-    <nuclide name="Ni-61" wo="0.000982608081" />
-    <nuclide name="Ni-62" wo="0.003185377845" />
-    <nuclide name="Ni-64" wo="0.000837251856" />
-    <nuclide name="Mn-55" wo="0.0184579" />
-    <nuclide name="Si-28" wo="0.00847831314" />
-    <nuclide name="Si-29" wo="0.00044612986" />
-    <nuclide name="Si-30" wo="0.000304557" />
-    <nuclide name="Cr-50" wo="0.00731912987" />
-    <nuclide name="Cr-52" wo="0.146766614995" />
-    <nuclide name="Cr-53" wo="0.01696340737" />
-    <nuclide name="Cr-54" wo="0.004301347765" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom plate region -->
-  <material id="8">
-    <density value="7.184" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0011505" />
-    <nuclide name="O-16"  wo="0.0091296" />
-    <nuclide name="B-10"  wo="3.70915e-6" />
-    <nuclide name="B-11"  wo="1.68974e-5" />
-    <nuclide name="Fe-54" wo="0.03855611055" />
-    <nuclide name="Fe-56" wo="0.627585036425" />
-    <nuclide name="Fe-57" wo="0.014750478" />
-    <nuclide name="Fe-58" wo="0.002000875025" />
-    <nuclide name="Ni-58" wo="0.059855207342" />
-    <nuclide name="Ni-60" wo="0.023850159704" />
-    <nuclide name="Ni-61" wo="0.001053732407" />
-    <nuclide name="Ni-62" wo="0.003415945715" />
-    <nuclide name="Ni-64" wo="0.000897854832" />
-    <nuclide name="Mn-55" wo="0.0197940" />
-    <nuclide name="Si-28" wo="0.00909197802" />
-    <nuclide name="Si-29" wo="0.00047842098" />
-    <nuclide name="Si-30" wo="0.000326601" />
-    <nuclide name="Cr-50" wo="0.007848910646" />
-    <nuclide name="Cr-52" wo="0.157390026871" />
-    <nuclide name="Cr-53" wo="0.018191270146" />
-    <nuclide name="Cr-54" wo="0.004612692337" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom nozzle region -->
-  <material id="9">
-    <density value="2.53" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0245014" />
-    <nuclide name="O-16"  wo="0.1944274" />
-    <nuclide name="B-10"  wo="7.89917e-5" />
-    <nuclide name="B-11"  wo="3.59854e-4" />
-    <nuclide name="Fe-54" wo="0.030411411144" />
-    <nuclide name="Fe-56" wo="0.495012237964" />
-    <nuclide name="Fe-57" wo="0.01163454624" />
-    <nuclide name="Fe-58" wo="0.001578204652" />
-    <nuclide name="Ni-58" wo="0.047211231662" />
-    <nuclide name="Ni-60" wo="0.018811987544" />
-    <nuclide name="Ni-61" wo="0.000831139127" />
-    <nuclide name="Ni-62" wo="0.002694352115" />
-    <nuclide name="Ni-64" wo="0.000708189552" />
-    <nuclide name="Mn-55" wo="0.0156126" />
-    <nuclide name="Si-28" wo="0.007171335558" />
-    <nuclide name="Si-29" wo="0.000377356542" />
-    <nuclide name="Si-30" wo="0.0002576079" />
-    <nuclide name="Cr-50" wo="0.006190885148" />
-    <nuclide name="Cr-52" wo="0.124142524198" />
-    <nuclide name="Cr-53" wo="0.014348496148" />
-    <nuclide name="Cr-54" wo="0.003638294506" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top nozzle region -->
-  <material id="10">
-    <density value="1.746" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0358870" />
-    <nuclide name="O-16"  wo="0.2847761" />
-    <nuclide name="B-10"  wo="1.15699e-4" />
-    <nuclide name="B-11"  wo="5.27075e-4" />
-    <nuclide name="Fe-54" wo="0.02644016154" />
-    <nuclide name="Fe-56" wo="0.43037146399" />
-    <nuclide name="Fe-57" wo="0.0101152584" />
-    <nuclide name="Fe-58" wo="0.00137211607" />
-    <nuclide name="Ni-58" wo="0.04104621835" />
-    <nuclide name="Ni-60" wo="0.0163554502" />
-    <nuclide name="Ni-61" wo="0.000722605975" />
-    <nuclide name="Ni-62" wo="0.002342513875" />
-    <nuclide name="Ni-64" wo="0.0006157116" />
-    <nuclide name="Mn-55" wo="0.0135739" />
-    <nuclide name="Si-28" wo="0.006234853554" />
-    <nuclide name="Si-29" wo="0.000328078746" />
-    <nuclide name="Si-30" wo="0.0002239677" />
-    <nuclide name="Cr-50" wo="0.005382452306" />
-    <nuclide name="Cr-52" wo="0.107931450781" />
-    <nuclide name="Cr-53" wo="0.012474806806" />
-    <nuclide name="Cr-54" wo="0.003163190107" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top of Fuel Assemblies -->
-  <material id="11">
-    <density value="3.044" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0162913" />
-    <nuclide name="O-16"  wo="0.1292776" />
-    <nuclide name="B-10"  wo="5.25228e-5" />
-    <nuclide name="B-11"  wo="2.39272e-4" />
-    <nuclide name="Zr-90" wo="0.43313403903" />
-    <nuclide name="Zr-91" wo="0.09549277374" />
-    <nuclide name="Zr-92" wo="0.14759527104" />
-    <nuclide name="Zr-94" wo="0.15280552077" />
-    <nuclide name="Zr-96" wo="0.02511169542" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom of Fuel Assemblies -->
-  <material id="12">
-    <density value="1.762" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0292856" />
-    <nuclide name="O-16"  wo="0.2323919" />
-    <nuclide name="B-10"  wo="9.44159e-5" />
-    <nuclide name="B-11"  wo="4.30120e-4" />
-    <nuclide name="Zr-90" wo="0.3741373658" />
-    <nuclide name="Zr-91" wo="0.0824858164" />
-    <nuclide name="Zr-92" wo="0.1274914944" />
-    <nuclide name="Zr-94" wo="0.1319920622" />
-    <nuclide name="Zr-96" wo="0.0216912612" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-</materials>
diff --git a/tests/test_score_absorption/results_true.dat b/tests/test_score_absorption/results_true.dat
index 9370a146f5..72661f77f4 100644
--- a/tests/test_score_absorption/results_true.dat
+++ b/tests/test_score_absorption/results_true.dat
@@ -1,29 +1,29 @@
 k-combined:
-1.005983E+00 2.248579E-02
+9.903196E-01 4.279617E-02
 tally 1:
 0.000000E+00
 0.000000E+00
-2.006479E+00
-8.808050E-01
-1.444838E-02
-4.349668E-05
-2.926865E-01
-1.944083E-02
+2.533174E+00
+1.298118E+00
+2.453769E-02
+1.227715E-04
+3.869051E-01
+3.180828E-02
 tally 2:
 0.000000E+00
 0.000000E+00
-2.030000E+00
-8.879000E-01
-0.000000E+00
-0.000000E+00
+2.540000E+00
+1.293400E+00
+4.000000E-02
+6.000000E-04
 4.000000E-01
-4.240000E-02
+3.600000E-02
 tally 3:
 0.000000E+00
 0.000000E+00
-1.990713E+00
-8.557870E-01
-1.427399E-02
-4.420707E-05
-2.968053E-01
-1.960663E-02
+2.422314E+00
+1.193460E+00
+4.285618E-02
+4.109734E-04
+3.832282E-01
+3.169516E-02
diff --git a/tests/test_score_absorption/settings.xml b/tests/test_score_absorption/settings.xml
deleted file mode 100644
index 517637a59f..0000000000
--- a/tests/test_score_absorption/settings.xml
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0"?>
-<settings>
-
-  <eigenvalue>
-    <batches>10</batches>
-    <inactive>5</inactive>
-    <particles>100</particles>
-  </eigenvalue>
-
-  <source>
-    <space type="box">
-      <parameters>
-        -160 -160 -183
-         160  160  183
-      </parameters>
-    </space>
-  </source>
-
-</settings>
diff --git a/tests/test_score_absorption/tallies.xml b/tests/test_score_absorption/tallies.xml
deleted file mode 100644
index 8b2dc29314..0000000000
--- a/tests/test_score_absorption/tallies.xml
+++ /dev/null
@@ -1,21 +0,0 @@
-<?xml version="1.0"?>
-<tallies>
-
-  <tally id="1">
-    <filter type="cell" bins="10 21 22 23" />
-    <scores>absorption</scores>
-  </tally>
-
-  <tally id="2">
-    <filter type="cell" bins="10 21 22 23" />
-    <estimator>analog</estimator>
-    <scores>absorption</scores>
-  </tally>
-
-  <tally id="3">
-    <filter type="cell" bins="10 21 22 23" />
-    <estimator>collision</estimator>
-    <scores>absorption</scores>
-  </tally>
-
-</tallies>
diff --git a/tests/test_score_absorption/test_score_absorption.py b/tests/test_score_absorption/test_score_absorption.py
index 1777db993e..c7e3e130df 100644
--- a/tests/test_score_absorption/test_score_absorption.py
+++ b/tests/test_score_absorption/test_score_absorption.py
@@ -1,10 +1,32 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
-from testing_harness import TestHarness
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness, PyAPITestHarness
+import openmc
+
+
+class ScoreAbsorptionTestHarness(PyAPITestHarness):
+    def _build_inputs(self):
+        filt = openmc.Filter(type='cell', bins=(10, 21, 22, 23))
+        tallies = [openmc.Tally(tally_id=i) for i in range(1, 4)]
+        [t.add_filter(filt) for t in tallies]
+        [t.add_score('absorption') for t in tallies]
+        tallies[0].estimator = 'tracklength'
+        tallies[1].estimator = 'analog'
+        tallies[2].estimator = 'collision'
+        self._input_set.tallies = openmc.TalliesFile()
+        [self._input_set.tallies.add_tally(t) for t in tallies]
+
+        super(ScoreAbsorptionTestHarness, self)._build_inputs()
+
+    def _cleanup(self):
+        super(ScoreAbsorptionTestHarness, self)._cleanup()
+        f = os.path.join(os.getcwd(), 'tallies.xml')
+        if os.path.exists(f): os.remove(f)
 
 
 if __name__ == '__main__':
-    harness = TestHarness('statepoint.10.*', True)
+    harness = ScoreAbsorptionTestHarness('statepoint.10.*', True)
     harness.main()
diff --git a/tests/test_score_current/test_score_current.py b/tests/test_score_current/test_score_current.py
index 64f640b96c..99c2981c2a 100644
--- a/tests/test_score_current/test_score_current.py
+++ b/tests/test_score_current/test_score_current.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import HashedTestHarness
 
 
diff --git a/tests/test_score_events/geometry.xml b/tests/test_score_events/geometry.xml
deleted file mode 100644
index f6f067aadd..0000000000
--- a/tests/test_score_events/geometry.xml
+++ /dev/null
@@ -1,181 +0,0 @@
-<?xml version="1.0"?>
-<geometry>
-
-  <surface id="1" type="z-cylinder" coeffs="0. 0. 0.41" />
-  <surface id="2" type="z-cylinder" coeffs="0. 0. 0.475" />
-  <surface id="3" type="z-cylinder" coeffs="0. 0. 0.56" />
-  <surface id="4" type="z-cylinder" coeffs="0. 0. 0.62" />
-  <surface id="5" type="z-cylinder" coeffs="0. 0. 187.6" />
-  <surface id="6" type="z-cylinder" coeffs="0. 0. 209.0" />
-  <surface id="7" type="z-cylinder" coeffs="0. 0. 229.0" />
-  <surface id="8" type="z-cylinder" coeffs="0. 0. 249.0" boundary="vacuum" />
-
-  <surface id="31" type="z-plane" coeffs="-229.0" boundary="vacuum" />
-  <surface id="32" type="z-plane" coeffs="-199.0" />
-  <surface id="33" type="z-plane" coeffs="-193.0" />
-  <surface id="34" type="z-plane" coeffs="-183.0" />
-  <surface id="35" type="z-plane" coeffs="0.0" />
-  <surface id="36" type="z-plane" coeffs="183.0" />
-  <surface id="37" type="z-plane" coeffs="203.0" />
-  <surface id="38" type="z-plane" coeffs="215.0" />
-  <surface id="39" type="z-plane" coeffs="223.0" boundary="vacuum" />
-
-  <!-- All geometry on base universe -->
-  <cell id="1"  fill="200"    region="  -6 34 -35" /> <!-- Lower core -->
-  <cell id="2"  fill="201"    region="  -6 35 -36" /> <!-- Upper core -->
-  <cell id="3"  material="8"  region="  -7 31 -32" /> <!-- Lower core plate region -->
-  <cell id="4"  material="9"  region="  -5 32 -33" /> <!-- Bottom nozzle region -->
-  <cell id="5"  material="12" region="  -5 33 -34" /> <!-- Bottom FA region -->
-  <cell id="6"  material="11" region="  -5 36 -37" /> <!-- Top FA region -->
-  <cell id="7"  material="10" region="  -5 37 -38" /> <!-- Top nozzle region -->
-  <cell id="8"  material="7"  region="  -7 38 -39" /> <!-- Upper plate region -->
-  <cell id="9"  material="4"  region="6 -7 32 -38" /> <!-- Downcomer -->
-  <cell id="10" material="5"  region="7 -8 31 -39" /> <!-- RPV -->
-  <cell id="11" material="6"  region="5 -6 32 -34" /> <!-- Bottom of radial reflector -->
-  <cell id="12" material="7"  region="5 -6 36 -38" /> <!-- Top of radial reflector -->
-
-  <!-- Fuel pin, cladding, cold water -->
-  <cell id="21" universe="1" material="1" region="-1"   />
-  <cell id="22" universe="1" material="2" region="1 -2" />
-  <cell id="23" universe="1" material="3" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="24" universe="2" material="3" region="-3"   />
-  <cell id="25" universe="2" material="2" region="3 -4" />
-  <cell id="26" universe="2" material="3" region="4"    />
-
-  <!-- Fuel pin, cladding, hot water -->
-  <cell id="27" universe="3" material="1" region="-1"   />
-  <cell id="28" universe="3" material="2" region="1 -2" />
-  <cell id="29" universe="3" material="4" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="30" universe="4" material="4" region="-3"   />
-  <cell id="31" universe="4" material="2" region="3 -4" />
-  <cell id="32" universe="4" material="4" region="4"    />
-
-  <!-- cell for water assembly (cold) -->
-  <cell id="50" universe="5" material="4" region="34 -35" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="60" universe="6" fill="100"   region="34 -35" />
-
-  <!-- cell for water assembly (hot) -->
-  <cell id="70" universe="7" material="3" region="35 -36" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="80" universe="8" fill="101"   region="35 -36" />
-
-  <!-- Fuel Assembly (Lower Half) -->
-  <lattice id="100">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-    </universes>
-  </lattice>
-
-  <!-- Fuel Assembly (Upper Half) -->
-  <lattice id="101">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Lower Half) -->
-  <lattice id="200">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Upper Half) -->
-  <lattice id="201">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-    </universes>
-  </lattice>
-
-</geometry>
diff --git a/tests/test_score_events/inputs_true.dat b/tests/test_score_events/inputs_true.dat
new file mode 100644
index 0000000000..1d2c8447cd
--- /dev/null
+++ b/tests/test_score_events/inputs_true.dat
@@ -0,0 +1 @@
+493830fe4598d5a2e31d4b79aceb79390bfa0bd7e08681ef36d5978a72de3cd7bcdbc06147061664614ed8e069be82d01e880e8e8cb629d3bd7aa1223850c8e6
\ No newline at end of file
diff --git a/tests/test_score_events/materials.xml b/tests/test_score_events/materials.xml
deleted file mode 100644
index 9c0b74f3f1..0000000000
--- a/tests/test_score_events/materials.xml
+++ /dev/null
@@ -1,272 +0,0 @@
-<?xml version="1.0"?>
-<materials>
-
-  <default_xs>71c</default_xs>
-
-  <!-- Fuel composition -->
-  <material id="1">
-    <density value="10.062" units="g/cm3" />
-    <nuclide name="U-234"   ao="4.9476e-6" />
-    <nuclide name="U-235"   ao="4.8218e-4" />
-    <nuclide name="U-236"   ao="9.0402e-5" />
-    <nuclide name="U-238"   ao="2.1504e-2" />
-    <nuclide name="Np-237"  ao="7.3733e-6" />
-    <nuclide name="Pu-238"  ao="1.5148e-6" />
-    <nuclide name="Pu-239"  ao="1.3955e-4" />
-    <nuclide name="Pu-240"  ao="3.4405e-5" />
-    <nuclide name="Pu-241"  ao="2.1439e-5" />
-    <nuclide name="Pu-242"  ao="3.7422e-6" />
-    <nuclide name="Am-241"  ao="4.5041e-7" />
-    <nuclide name="Am-242m" ao="9.2301e-9" />
-    <nuclide name="Am-243"  ao="4.7878e-7" />
-    <nuclide name="Cm-242"  ao="1.0485e-7" />
-    <nuclide name="Cm-243"  ao="1.4268e-9" />
-    <nuclide name="Cm-244"  ao="8.8756e-8" />
-    <nuclide name="Cm-245"  ao="3.5285e-9" />
-    <nuclide name="Mo-95"   ao="2.6497e-5" />
-    <nuclide name="Tc-99"   ao="3.2772e-5" />
-    <nuclide name="Ru-101"  ao="3.0742e-5" />
-    <nuclide name="Ru-103"  ao="2.3505e-6" />
-    <nuclide name="Ag-109"  ao="2.0009e-6" />
-    <nuclide name="Xe-135"  ao="1.0801e-8" />
-    <nuclide name="Cs-133"  ao="3.4612e-5" />
-    <nuclide name="Nd-143"  ao="2.6078e-5" />
-    <nuclide name="Nd-145"  ao="1.9898e-5" />
-    <nuclide name="Sm-147"  ao="1.6128e-6" />
-    <nuclide name="Sm-149"  ao="1.1627e-7" />
-    <nuclide name="Sm-150"  ao="7.1727e-6" />
-    <nuclide name="Sm-151"  ao="5.4947e-7" />
-    <nuclide name="Sm-152"  ao="3.0221e-6" />
-    <nuclide name="Eu-153"  ao="2.6209e-6" />
-    <nuclide name="Gd-155"  ao="1.5369e-9" />
-    <nuclide name="O-16"    ao="4.5737e-2" />
-  </material>
-
-  <!-- Cladding composition -->
-  <material id="2">
-    <density value="5.77" units="g/cm3" />
-    <nuclide name="Zr-90" ao="0.5145" />
-    <nuclide name="Zr-91" ao="0.1122" />
-    <nuclide name="Zr-92" ao="0.1715" />
-    <nuclide name="Zr-94" ao="0.1738" />
-    <nuclide name="Zr-96" ao="0.0280" />
-  </material>
-
-  <!-- Cold borated water -->
-  <material id="3">
-    <density value="0.07416" units="atom/b-cm" />
-    <nuclide name="H-1" ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Hot borated water -->
-  <material id="4">
-    <density value="0.06614" units="atom/b-cm" />
-    <nuclide name="H-1"  ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- RPV Composition -->
-  <material id="5">
-    <density value="7.9" units="g/cm3" />
-    <nuclide name="Fe-54"  wo="0.05437098" />
-    <nuclide name="Fe-56"  wo="0.88500663" />
-    <nuclide name="Fe-57"  wo="0.0208008" />
-    <nuclide name="Fe-58"  wo="0.00282159" />
-    <nuclide name="Ni-58"  wo="0.0067198" />
-    <nuclide name="Ni-60"  wo="0.0026776" />
-    <nuclide name="Ni-61"  wo="0.0001183" />
-    <nuclide name="Ni-62"  wo="0.0003835" />
-    <nuclide name="Ni-64"  wo="0.0001008" />
-    <nuclide name="Mn-55"  wo="0.01" />
-    <nuclide name="Mo-92"  wo="0.000849" />
-    <nuclide name="Mo-94"  wo="0.0005418" />
-    <nuclide name="Mo-95"  wo="0.0009438" />
-    <nuclide name="Mo-96"  wo="0.0010002" />
-    <nuclide name="Mo-97"  wo="0.0005796" />
-    <nuclide name="Mo-98"  wo="0.0014814" />
-    <nuclide name="Mo-100" wo="0.0006042" />
-    <nuclide name="Si-28"  wo="0.00367464" />
-    <nuclide name="Si-29"  wo="0.00019336" />
-    <nuclide name="Si-30"  wo="0.000132" />
-    <nuclide name="Cr-50"  wo="0.00010435" />
-    <nuclide name="Cr-52"  wo="0.002092475" />
-    <nuclide name="Cr-53"  wo="0.00024185" />
-    <nuclide name="Cr-54"  wo="6.1325e-05" />
-    <nuclide name="C-Nat"  wo="0.0025" />
-    <nuclide name="Cu-63"  wo="0.0013696" />
-    <nuclide name="Cu-65"  wo="0.0006304" />
-  </material>
-
-  <!-- Lower radial reflector -->
-  <material id="6">
-    <density value="4.32" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0095661" />
-    <nuclide name="O-16"  wo="0.0759107" />
-    <nuclide name="B-10"  wo="3.08409e-5" />
-    <nuclide name="B-11"  wo="1.40499e-4" />
-    <nuclide name="Fe-54" wo="0.035620772088" />
-    <nuclide name="Fe-56" wo="0.579805982228" />
-    <nuclide name="Fe-57" wo="0.01362750048" />
-    <nuclide name="Fe-58" wo="0.001848545204" />
-    <nuclide name="Ni-58" wo="0.055298376566" />
-    <nuclide name="Ni-60" wo="0.022034425592" />
-    <nuclide name="Ni-61" wo="0.000973510811" />
-    <nuclide name="Ni-62" wo="0.003155886695" />
-    <nuclide name="Ni-64" wo="0.000829500336" />
-    <nuclide name="Mn-55" wo="0.0182870" />
-    <nuclide name="Si-28" wo="0.00839976771" />
-    <nuclide name="Si-29" wo="0.00044199679" />
-    <nuclide name="Si-30" wo="0.0003017355" />
-    <nuclide name="Cr-50" wo="0.007251360806" />
-    <nuclide name="Cr-52" wo="0.145407678031" />
-    <nuclide name="Cr-53" wo="0.016806340306" />
-    <nuclide name="Cr-54" wo="0.004261520857" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Upper radial reflector / Top plate region -->
-  <material id="7">
-    <density value="4.28" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0086117" />
-    <nuclide name="O-16"  wo="0.0683369" />
-    <nuclide name="B-10"  wo="2.77638e-5" />
-    <nuclide name="B-11"  wo="1.26481e-4" />
-    <nuclide name="Fe-54" wo="0.035953677186" />
-    <nuclide name="Fe-56" wo="0.585224740891" />
-    <nuclide name="Fe-57" wo="0.01375486056" />
-    <nuclide name="Fe-58" wo="0.001865821363" />
-    <nuclide name="Ni-58" wo="0.055815129186" />
-    <nuclide name="Ni-60" wo="0.022240333032" />
-    <nuclide name="Ni-61" wo="0.000982608081" />
-    <nuclide name="Ni-62" wo="0.003185377845" />
-    <nuclide name="Ni-64" wo="0.000837251856" />
-    <nuclide name="Mn-55" wo="0.0184579" />
-    <nuclide name="Si-28" wo="0.00847831314" />
-    <nuclide name="Si-29" wo="0.00044612986" />
-    <nuclide name="Si-30" wo="0.000304557" />
-    <nuclide name="Cr-50" wo="0.00731912987" />
-    <nuclide name="Cr-52" wo="0.146766614995" />
-    <nuclide name="Cr-53" wo="0.01696340737" />
-    <nuclide name="Cr-54" wo="0.004301347765" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom plate region -->
-  <material id="8">
-    <density value="7.184" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0011505" />
-    <nuclide name="O-16"  wo="0.0091296" />
-    <nuclide name="B-10"  wo="3.70915e-6" />
-    <nuclide name="B-11"  wo="1.68974e-5" />
-    <nuclide name="Fe-54" wo="0.03855611055" />
-    <nuclide name="Fe-56" wo="0.627585036425" />
-    <nuclide name="Fe-57" wo="0.014750478" />
-    <nuclide name="Fe-58" wo="0.002000875025" />
-    <nuclide name="Ni-58" wo="0.059855207342" />
-    <nuclide name="Ni-60" wo="0.023850159704" />
-    <nuclide name="Ni-61" wo="0.001053732407" />
-    <nuclide name="Ni-62" wo="0.003415945715" />
-    <nuclide name="Ni-64" wo="0.000897854832" />
-    <nuclide name="Mn-55" wo="0.0197940" />
-    <nuclide name="Si-28" wo="0.00909197802" />
-    <nuclide name="Si-29" wo="0.00047842098" />
-    <nuclide name="Si-30" wo="0.000326601" />
-    <nuclide name="Cr-50" wo="0.007848910646" />
-    <nuclide name="Cr-52" wo="0.157390026871" />
-    <nuclide name="Cr-53" wo="0.018191270146" />
-    <nuclide name="Cr-54" wo="0.004612692337" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom nozzle region -->
-  <material id="9">
-    <density value="2.53" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0245014" />
-    <nuclide name="O-16"  wo="0.1944274" />
-    <nuclide name="B-10"  wo="7.89917e-5" />
-    <nuclide name="B-11"  wo="3.59854e-4" />
-    <nuclide name="Fe-54" wo="0.030411411144" />
-    <nuclide name="Fe-56" wo="0.495012237964" />
-    <nuclide name="Fe-57" wo="0.01163454624" />
-    <nuclide name="Fe-58" wo="0.001578204652" />
-    <nuclide name="Ni-58" wo="0.047211231662" />
-    <nuclide name="Ni-60" wo="0.018811987544" />
-    <nuclide name="Ni-61" wo="0.000831139127" />
-    <nuclide name="Ni-62" wo="0.002694352115" />
-    <nuclide name="Ni-64" wo="0.000708189552" />
-    <nuclide name="Mn-55" wo="0.0156126" />
-    <nuclide name="Si-28" wo="0.007171335558" />
-    <nuclide name="Si-29" wo="0.000377356542" />
-    <nuclide name="Si-30" wo="0.0002576079" />
-    <nuclide name="Cr-50" wo="0.006190885148" />
-    <nuclide name="Cr-52" wo="0.124142524198" />
-    <nuclide name="Cr-53" wo="0.014348496148" />
-    <nuclide name="Cr-54" wo="0.003638294506" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top nozzle region -->
-  <material id="10">
-    <density value="1.746" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0358870" />
-    <nuclide name="O-16"  wo="0.2847761" />
-    <nuclide name="B-10"  wo="1.15699e-4" />
-    <nuclide name="B-11"  wo="5.27075e-4" />
-    <nuclide name="Fe-54" wo="0.02644016154" />
-    <nuclide name="Fe-56" wo="0.43037146399" />
-    <nuclide name="Fe-57" wo="0.0101152584" />
-    <nuclide name="Fe-58" wo="0.00137211607" />
-    <nuclide name="Ni-58" wo="0.04104621835" />
-    <nuclide name="Ni-60" wo="0.0163554502" />
-    <nuclide name="Ni-61" wo="0.000722605975" />
-    <nuclide name="Ni-62" wo="0.002342513875" />
-    <nuclide name="Ni-64" wo="0.0006157116" />
-    <nuclide name="Mn-55" wo="0.0135739" />
-    <nuclide name="Si-28" wo="0.006234853554" />
-    <nuclide name="Si-29" wo="0.000328078746" />
-    <nuclide name="Si-30" wo="0.0002239677" />
-    <nuclide name="Cr-50" wo="0.005382452306" />
-    <nuclide name="Cr-52" wo="0.107931450781" />
-    <nuclide name="Cr-53" wo="0.012474806806" />
-    <nuclide name="Cr-54" wo="0.003163190107" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top of Fuel Assemblies -->
-  <material id="11">
-    <density value="3.044" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0162913" />
-    <nuclide name="O-16"  wo="0.1292776" />
-    <nuclide name="B-10"  wo="5.25228e-5" />
-    <nuclide name="B-11"  wo="2.39272e-4" />
-    <nuclide name="Zr-90" wo="0.43313403903" />
-    <nuclide name="Zr-91" wo="0.09549277374" />
-    <nuclide name="Zr-92" wo="0.14759527104" />
-    <nuclide name="Zr-94" wo="0.15280552077" />
-    <nuclide name="Zr-96" wo="0.02511169542" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom of Fuel Assemblies -->
-  <material id="12">
-    <density value="1.762" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0292856" />
-    <nuclide name="O-16"  wo="0.2323919" />
-    <nuclide name="B-10"  wo="9.44159e-5" />
-    <nuclide name="B-11"  wo="4.30120e-4" />
-    <nuclide name="Zr-90" wo="0.3741373658" />
-    <nuclide name="Zr-91" wo="0.0824858164" />
-    <nuclide name="Zr-92" wo="0.1274914944" />
-    <nuclide name="Zr-94" wo="0.1319920622" />
-    <nuclide name="Zr-96" wo="0.0216912612" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-</materials>
diff --git a/tests/test_score_events/results_true.dat b/tests/test_score_events/results_true.dat
index 35ae33eb86..34b114fbcb 100644
--- a/tests/test_score_events/results_true.dat
+++ b/tests/test_score_events/results_true.dat
@@ -1,12 +1,12 @@
 k-combined:
-1.005983E+00 2.248579E-02
+9.903196E-01 4.279617E-02
 tally 1:
-5.328000E+01
-6.082750E+02
-5.594000E+01
-6.836068E+02
+6.520000E+01
+8.551888E+02
+4.035000E+01
+3.351119E+02
 tally 2:
-1.372000E+01
-4.018980E+01
-1.474000E+01
-4.802520E+01
+1.739000E+01
+6.083290E+01
+1.104000E+01
+2.498260E+01
diff --git a/tests/test_score_events/settings.xml b/tests/test_score_events/settings.xml
deleted file mode 100644
index 517637a59f..0000000000
--- a/tests/test_score_events/settings.xml
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0"?>
-<settings>
-
-  <eigenvalue>
-    <batches>10</batches>
-    <inactive>5</inactive>
-    <particles>100</particles>
-  </eigenvalue>
-
-  <source>
-    <space type="box">
-      <parameters>
-        -160 -160 -183
-         160  160  183
-      </parameters>
-    </space>
-  </source>
-
-</settings>
diff --git a/tests/test_score_events/tallies.xml b/tests/test_score_events/tallies.xml
deleted file mode 100644
index ac47f9ec86..0000000000
--- a/tests/test_score_events/tallies.xml
+++ /dev/null
@@ -1,17 +0,0 @@
-<?xml version="1.0"?>
-<tallies>
-
-  <!-- Number of tracks in fuel -->
-  <tally id="1">
-    <filter type="cell" bins="21 27" />
-    <scores>events</scores>
-  </tally>
-
-  <!-- Number of collisions in fuel -->
-  <tally id="2">
-    <filter type="cell" bins="21 27" />
-    <estimator>analog</estimator>
-    <scores>events</scores>
-  </tally>
-
-</tallies>
\ No newline at end of file
diff --git a/tests/test_score_events/test_score_events.py b/tests/test_score_events/test_score_events.py
index 1777db993e..dce944592e 100644
--- a/tests/test_score_events/test_score_events.py
+++ b/tests/test_score_events/test_score_events.py
@@ -1,10 +1,31 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
-from testing_harness import TestHarness
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness, PyAPITestHarness
+import openmc
+
+
+class ScoreEventsTestHarness(PyAPITestHarness):
+    def _build_inputs(self):
+        filt = openmc.Filter(type='cell', bins=(21, 27))
+        tallies = [openmc.Tally(tally_id=i) for i in range(1, 3)]
+        [t.add_filter(filt) for t in tallies]
+        [t.add_score('events') for t in tallies]
+        tallies[0].estimator = 'tracklength'
+        tallies[1].estimator = 'analog'
+        self._input_set.tallies = openmc.TalliesFile()
+        [self._input_set.tallies.add_tally(t) for t in tallies]
+
+        super(ScoreEventsTestHarness, self)._build_inputs()
+
+    def _cleanup(self):
+        super(ScoreEventsTestHarness, self)._cleanup()
+        f = os.path.join(os.getcwd(), 'tallies.xml')
+        if os.path.exists(f): os.remove(f)
 
 
 if __name__ == '__main__':
-    harness = TestHarness('statepoint.10.*', True)
+    harness = ScoreEventsTestHarness('statepoint.10.*', True)
     harness.main()
diff --git a/tests/test_score_fission/geometry.xml b/tests/test_score_fission/geometry.xml
deleted file mode 100644
index f6f067aadd..0000000000
--- a/tests/test_score_fission/geometry.xml
+++ /dev/null
@@ -1,181 +0,0 @@
-<?xml version="1.0"?>
-<geometry>
-
-  <surface id="1" type="z-cylinder" coeffs="0. 0. 0.41" />
-  <surface id="2" type="z-cylinder" coeffs="0. 0. 0.475" />
-  <surface id="3" type="z-cylinder" coeffs="0. 0. 0.56" />
-  <surface id="4" type="z-cylinder" coeffs="0. 0. 0.62" />
-  <surface id="5" type="z-cylinder" coeffs="0. 0. 187.6" />
-  <surface id="6" type="z-cylinder" coeffs="0. 0. 209.0" />
-  <surface id="7" type="z-cylinder" coeffs="0. 0. 229.0" />
-  <surface id="8" type="z-cylinder" coeffs="0. 0. 249.0" boundary="vacuum" />
-
-  <surface id="31" type="z-plane" coeffs="-229.0" boundary="vacuum" />
-  <surface id="32" type="z-plane" coeffs="-199.0" />
-  <surface id="33" type="z-plane" coeffs="-193.0" />
-  <surface id="34" type="z-plane" coeffs="-183.0" />
-  <surface id="35" type="z-plane" coeffs="0.0" />
-  <surface id="36" type="z-plane" coeffs="183.0" />
-  <surface id="37" type="z-plane" coeffs="203.0" />
-  <surface id="38" type="z-plane" coeffs="215.0" />
-  <surface id="39" type="z-plane" coeffs="223.0" boundary="vacuum" />
-
-  <!-- All geometry on base universe -->
-  <cell id="1"  fill="200"    region="  -6 34 -35" /> <!-- Lower core -->
-  <cell id="2"  fill="201"    region="  -6 35 -36" /> <!-- Upper core -->
-  <cell id="3"  material="8"  region="  -7 31 -32" /> <!-- Lower core plate region -->
-  <cell id="4"  material="9"  region="  -5 32 -33" /> <!-- Bottom nozzle region -->
-  <cell id="5"  material="12" region="  -5 33 -34" /> <!-- Bottom FA region -->
-  <cell id="6"  material="11" region="  -5 36 -37" /> <!-- Top FA region -->
-  <cell id="7"  material="10" region="  -5 37 -38" /> <!-- Top nozzle region -->
-  <cell id="8"  material="7"  region="  -7 38 -39" /> <!-- Upper plate region -->
-  <cell id="9"  material="4"  region="6 -7 32 -38" /> <!-- Downcomer -->
-  <cell id="10" material="5"  region="7 -8 31 -39" /> <!-- RPV -->
-  <cell id="11" material="6"  region="5 -6 32 -34" /> <!-- Bottom of radial reflector -->
-  <cell id="12" material="7"  region="5 -6 36 -38" /> <!-- Top of radial reflector -->
-
-  <!-- Fuel pin, cladding, cold water -->
-  <cell id="21" universe="1" material="1" region="-1"   />
-  <cell id="22" universe="1" material="2" region="1 -2" />
-  <cell id="23" universe="1" material="3" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="24" universe="2" material="3" region="-3"   />
-  <cell id="25" universe="2" material="2" region="3 -4" />
-  <cell id="26" universe="2" material="3" region="4"    />
-
-  <!-- Fuel pin, cladding, hot water -->
-  <cell id="27" universe="3" material="1" region="-1"   />
-  <cell id="28" universe="3" material="2" region="1 -2" />
-  <cell id="29" universe="3" material="4" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="30" universe="4" material="4" region="-3"   />
-  <cell id="31" universe="4" material="2" region="3 -4" />
-  <cell id="32" universe="4" material="4" region="4"    />
-
-  <!-- cell for water assembly (cold) -->
-  <cell id="50" universe="5" material="4" region="34 -35" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="60" universe="6" fill="100"   region="34 -35" />
-
-  <!-- cell for water assembly (hot) -->
-  <cell id="70" universe="7" material="3" region="35 -36" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="80" universe="8" fill="101"   region="35 -36" />
-
-  <!-- Fuel Assembly (Lower Half) -->
-  <lattice id="100">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-    </universes>
-  </lattice>
-
-  <!-- Fuel Assembly (Upper Half) -->
-  <lattice id="101">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Lower Half) -->
-  <lattice id="200">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Upper Half) -->
-  <lattice id="201">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-    </universes>
-  </lattice>
-
-</geometry>
diff --git a/tests/test_score_fission/inputs_true.dat b/tests/test_score_fission/inputs_true.dat
new file mode 100644
index 0000000000..0abc63556a
--- /dev/null
+++ b/tests/test_score_fission/inputs_true.dat
@@ -0,0 +1 @@
+e94e6338c6aadaebd6f3cdad768b53908e470dc6d650a170703b21bf0140313559ce2af78f6b8bd13498dc5019ce02603ec6ba7c68731dfa05ca4a540f159625
\ No newline at end of file
diff --git a/tests/test_score_fission/materials.xml b/tests/test_score_fission/materials.xml
deleted file mode 100644
index 9c0b74f3f1..0000000000
--- a/tests/test_score_fission/materials.xml
+++ /dev/null
@@ -1,272 +0,0 @@
-<?xml version="1.0"?>
-<materials>
-
-  <default_xs>71c</default_xs>
-
-  <!-- Fuel composition -->
-  <material id="1">
-    <density value="10.062" units="g/cm3" />
-    <nuclide name="U-234"   ao="4.9476e-6" />
-    <nuclide name="U-235"   ao="4.8218e-4" />
-    <nuclide name="U-236"   ao="9.0402e-5" />
-    <nuclide name="U-238"   ao="2.1504e-2" />
-    <nuclide name="Np-237"  ao="7.3733e-6" />
-    <nuclide name="Pu-238"  ao="1.5148e-6" />
-    <nuclide name="Pu-239"  ao="1.3955e-4" />
-    <nuclide name="Pu-240"  ao="3.4405e-5" />
-    <nuclide name="Pu-241"  ao="2.1439e-5" />
-    <nuclide name="Pu-242"  ao="3.7422e-6" />
-    <nuclide name="Am-241"  ao="4.5041e-7" />
-    <nuclide name="Am-242m" ao="9.2301e-9" />
-    <nuclide name="Am-243"  ao="4.7878e-7" />
-    <nuclide name="Cm-242"  ao="1.0485e-7" />
-    <nuclide name="Cm-243"  ao="1.4268e-9" />
-    <nuclide name="Cm-244"  ao="8.8756e-8" />
-    <nuclide name="Cm-245"  ao="3.5285e-9" />
-    <nuclide name="Mo-95"   ao="2.6497e-5" />
-    <nuclide name="Tc-99"   ao="3.2772e-5" />
-    <nuclide name="Ru-101"  ao="3.0742e-5" />
-    <nuclide name="Ru-103"  ao="2.3505e-6" />
-    <nuclide name="Ag-109"  ao="2.0009e-6" />
-    <nuclide name="Xe-135"  ao="1.0801e-8" />
-    <nuclide name="Cs-133"  ao="3.4612e-5" />
-    <nuclide name="Nd-143"  ao="2.6078e-5" />
-    <nuclide name="Nd-145"  ao="1.9898e-5" />
-    <nuclide name="Sm-147"  ao="1.6128e-6" />
-    <nuclide name="Sm-149"  ao="1.1627e-7" />
-    <nuclide name="Sm-150"  ao="7.1727e-6" />
-    <nuclide name="Sm-151"  ao="5.4947e-7" />
-    <nuclide name="Sm-152"  ao="3.0221e-6" />
-    <nuclide name="Eu-153"  ao="2.6209e-6" />
-    <nuclide name="Gd-155"  ao="1.5369e-9" />
-    <nuclide name="O-16"    ao="4.5737e-2" />
-  </material>
-
-  <!-- Cladding composition -->
-  <material id="2">
-    <density value="5.77" units="g/cm3" />
-    <nuclide name="Zr-90" ao="0.5145" />
-    <nuclide name="Zr-91" ao="0.1122" />
-    <nuclide name="Zr-92" ao="0.1715" />
-    <nuclide name="Zr-94" ao="0.1738" />
-    <nuclide name="Zr-96" ao="0.0280" />
-  </material>
-
-  <!-- Cold borated water -->
-  <material id="3">
-    <density value="0.07416" units="atom/b-cm" />
-    <nuclide name="H-1" ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Hot borated water -->
-  <material id="4">
-    <density value="0.06614" units="atom/b-cm" />
-    <nuclide name="H-1"  ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- RPV Composition -->
-  <material id="5">
-    <density value="7.9" units="g/cm3" />
-    <nuclide name="Fe-54"  wo="0.05437098" />
-    <nuclide name="Fe-56"  wo="0.88500663" />
-    <nuclide name="Fe-57"  wo="0.0208008" />
-    <nuclide name="Fe-58"  wo="0.00282159" />
-    <nuclide name="Ni-58"  wo="0.0067198" />
-    <nuclide name="Ni-60"  wo="0.0026776" />
-    <nuclide name="Ni-61"  wo="0.0001183" />
-    <nuclide name="Ni-62"  wo="0.0003835" />
-    <nuclide name="Ni-64"  wo="0.0001008" />
-    <nuclide name="Mn-55"  wo="0.01" />
-    <nuclide name="Mo-92"  wo="0.000849" />
-    <nuclide name="Mo-94"  wo="0.0005418" />
-    <nuclide name="Mo-95"  wo="0.0009438" />
-    <nuclide name="Mo-96"  wo="0.0010002" />
-    <nuclide name="Mo-97"  wo="0.0005796" />
-    <nuclide name="Mo-98"  wo="0.0014814" />
-    <nuclide name="Mo-100" wo="0.0006042" />
-    <nuclide name="Si-28"  wo="0.00367464" />
-    <nuclide name="Si-29"  wo="0.00019336" />
-    <nuclide name="Si-30"  wo="0.000132" />
-    <nuclide name="Cr-50"  wo="0.00010435" />
-    <nuclide name="Cr-52"  wo="0.002092475" />
-    <nuclide name="Cr-53"  wo="0.00024185" />
-    <nuclide name="Cr-54"  wo="6.1325e-05" />
-    <nuclide name="C-Nat"  wo="0.0025" />
-    <nuclide name="Cu-63"  wo="0.0013696" />
-    <nuclide name="Cu-65"  wo="0.0006304" />
-  </material>
-
-  <!-- Lower radial reflector -->
-  <material id="6">
-    <density value="4.32" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0095661" />
-    <nuclide name="O-16"  wo="0.0759107" />
-    <nuclide name="B-10"  wo="3.08409e-5" />
-    <nuclide name="B-11"  wo="1.40499e-4" />
-    <nuclide name="Fe-54" wo="0.035620772088" />
-    <nuclide name="Fe-56" wo="0.579805982228" />
-    <nuclide name="Fe-57" wo="0.01362750048" />
-    <nuclide name="Fe-58" wo="0.001848545204" />
-    <nuclide name="Ni-58" wo="0.055298376566" />
-    <nuclide name="Ni-60" wo="0.022034425592" />
-    <nuclide name="Ni-61" wo="0.000973510811" />
-    <nuclide name="Ni-62" wo="0.003155886695" />
-    <nuclide name="Ni-64" wo="0.000829500336" />
-    <nuclide name="Mn-55" wo="0.0182870" />
-    <nuclide name="Si-28" wo="0.00839976771" />
-    <nuclide name="Si-29" wo="0.00044199679" />
-    <nuclide name="Si-30" wo="0.0003017355" />
-    <nuclide name="Cr-50" wo="0.007251360806" />
-    <nuclide name="Cr-52" wo="0.145407678031" />
-    <nuclide name="Cr-53" wo="0.016806340306" />
-    <nuclide name="Cr-54" wo="0.004261520857" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Upper radial reflector / Top plate region -->
-  <material id="7">
-    <density value="4.28" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0086117" />
-    <nuclide name="O-16"  wo="0.0683369" />
-    <nuclide name="B-10"  wo="2.77638e-5" />
-    <nuclide name="B-11"  wo="1.26481e-4" />
-    <nuclide name="Fe-54" wo="0.035953677186" />
-    <nuclide name="Fe-56" wo="0.585224740891" />
-    <nuclide name="Fe-57" wo="0.01375486056" />
-    <nuclide name="Fe-58" wo="0.001865821363" />
-    <nuclide name="Ni-58" wo="0.055815129186" />
-    <nuclide name="Ni-60" wo="0.022240333032" />
-    <nuclide name="Ni-61" wo="0.000982608081" />
-    <nuclide name="Ni-62" wo="0.003185377845" />
-    <nuclide name="Ni-64" wo="0.000837251856" />
-    <nuclide name="Mn-55" wo="0.0184579" />
-    <nuclide name="Si-28" wo="0.00847831314" />
-    <nuclide name="Si-29" wo="0.00044612986" />
-    <nuclide name="Si-30" wo="0.000304557" />
-    <nuclide name="Cr-50" wo="0.00731912987" />
-    <nuclide name="Cr-52" wo="0.146766614995" />
-    <nuclide name="Cr-53" wo="0.01696340737" />
-    <nuclide name="Cr-54" wo="0.004301347765" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom plate region -->
-  <material id="8">
-    <density value="7.184" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0011505" />
-    <nuclide name="O-16"  wo="0.0091296" />
-    <nuclide name="B-10"  wo="3.70915e-6" />
-    <nuclide name="B-11"  wo="1.68974e-5" />
-    <nuclide name="Fe-54" wo="0.03855611055" />
-    <nuclide name="Fe-56" wo="0.627585036425" />
-    <nuclide name="Fe-57" wo="0.014750478" />
-    <nuclide name="Fe-58" wo="0.002000875025" />
-    <nuclide name="Ni-58" wo="0.059855207342" />
-    <nuclide name="Ni-60" wo="0.023850159704" />
-    <nuclide name="Ni-61" wo="0.001053732407" />
-    <nuclide name="Ni-62" wo="0.003415945715" />
-    <nuclide name="Ni-64" wo="0.000897854832" />
-    <nuclide name="Mn-55" wo="0.0197940" />
-    <nuclide name="Si-28" wo="0.00909197802" />
-    <nuclide name="Si-29" wo="0.00047842098" />
-    <nuclide name="Si-30" wo="0.000326601" />
-    <nuclide name="Cr-50" wo="0.007848910646" />
-    <nuclide name="Cr-52" wo="0.157390026871" />
-    <nuclide name="Cr-53" wo="0.018191270146" />
-    <nuclide name="Cr-54" wo="0.004612692337" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom nozzle region -->
-  <material id="9">
-    <density value="2.53" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0245014" />
-    <nuclide name="O-16"  wo="0.1944274" />
-    <nuclide name="B-10"  wo="7.89917e-5" />
-    <nuclide name="B-11"  wo="3.59854e-4" />
-    <nuclide name="Fe-54" wo="0.030411411144" />
-    <nuclide name="Fe-56" wo="0.495012237964" />
-    <nuclide name="Fe-57" wo="0.01163454624" />
-    <nuclide name="Fe-58" wo="0.001578204652" />
-    <nuclide name="Ni-58" wo="0.047211231662" />
-    <nuclide name="Ni-60" wo="0.018811987544" />
-    <nuclide name="Ni-61" wo="0.000831139127" />
-    <nuclide name="Ni-62" wo="0.002694352115" />
-    <nuclide name="Ni-64" wo="0.000708189552" />
-    <nuclide name="Mn-55" wo="0.0156126" />
-    <nuclide name="Si-28" wo="0.007171335558" />
-    <nuclide name="Si-29" wo="0.000377356542" />
-    <nuclide name="Si-30" wo="0.0002576079" />
-    <nuclide name="Cr-50" wo="0.006190885148" />
-    <nuclide name="Cr-52" wo="0.124142524198" />
-    <nuclide name="Cr-53" wo="0.014348496148" />
-    <nuclide name="Cr-54" wo="0.003638294506" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top nozzle region -->
-  <material id="10">
-    <density value="1.746" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0358870" />
-    <nuclide name="O-16"  wo="0.2847761" />
-    <nuclide name="B-10"  wo="1.15699e-4" />
-    <nuclide name="B-11"  wo="5.27075e-4" />
-    <nuclide name="Fe-54" wo="0.02644016154" />
-    <nuclide name="Fe-56" wo="0.43037146399" />
-    <nuclide name="Fe-57" wo="0.0101152584" />
-    <nuclide name="Fe-58" wo="0.00137211607" />
-    <nuclide name="Ni-58" wo="0.04104621835" />
-    <nuclide name="Ni-60" wo="0.0163554502" />
-    <nuclide name="Ni-61" wo="0.000722605975" />
-    <nuclide name="Ni-62" wo="0.002342513875" />
-    <nuclide name="Ni-64" wo="0.0006157116" />
-    <nuclide name="Mn-55" wo="0.0135739" />
-    <nuclide name="Si-28" wo="0.006234853554" />
-    <nuclide name="Si-29" wo="0.000328078746" />
-    <nuclide name="Si-30" wo="0.0002239677" />
-    <nuclide name="Cr-50" wo="0.005382452306" />
-    <nuclide name="Cr-52" wo="0.107931450781" />
-    <nuclide name="Cr-53" wo="0.012474806806" />
-    <nuclide name="Cr-54" wo="0.003163190107" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top of Fuel Assemblies -->
-  <material id="11">
-    <density value="3.044" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0162913" />
-    <nuclide name="O-16"  wo="0.1292776" />
-    <nuclide name="B-10"  wo="5.25228e-5" />
-    <nuclide name="B-11"  wo="2.39272e-4" />
-    <nuclide name="Zr-90" wo="0.43313403903" />
-    <nuclide name="Zr-91" wo="0.09549277374" />
-    <nuclide name="Zr-92" wo="0.14759527104" />
-    <nuclide name="Zr-94" wo="0.15280552077" />
-    <nuclide name="Zr-96" wo="0.02511169542" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom of Fuel Assemblies -->
-  <material id="12">
-    <density value="1.762" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0292856" />
-    <nuclide name="O-16"  wo="0.2323919" />
-    <nuclide name="B-10"  wo="9.44159e-5" />
-    <nuclide name="B-11"  wo="4.30120e-4" />
-    <nuclide name="Zr-90" wo="0.3741373658" />
-    <nuclide name="Zr-91" wo="0.0824858164" />
-    <nuclide name="Zr-92" wo="0.1274914944" />
-    <nuclide name="Zr-94" wo="0.1319920622" />
-    <nuclide name="Zr-96" wo="0.0216912612" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-</materials>
diff --git a/tests/test_score_fission/results_true.dat b/tests/test_score_fission/results_true.dat
index 86b31aaafd..2b28cc825c 100644
--- a/tests/test_score_fission/results_true.dat
+++ b/tests/test_score_fission/results_true.dat
@@ -1,29 +1,29 @@
 k-combined:
-1.005983E+00 2.248579E-02
+9.903196E-01 4.279617E-02
 tally 1:
-9.432574E-01
-1.970463E-01
+1.156315E+00
+2.733527E-01
 0.000000E+00
 0.000000E+00
 0.000000E+00
 0.000000E+00
-1.039280E+00
-2.345809E-01
+6.971594E-01
+1.004973E-01
 tally 2:
-8.953531E-01
-1.798609E-01
+1.225263E+00
+3.054971E-01
 0.000000E+00
 0.000000E+00
 0.000000E+00
 0.000000E+00
-9.923196E-01
-2.067216E-01
+6.475958E-01
+8.567154E-02
 tally 3:
-9.036254E-01
-1.746552E-01
+1.131528E+00
+2.612886E-01
 0.000000E+00
 0.000000E+00
 0.000000E+00
 0.000000E+00
-9.912744E-01
-2.192705E-01
+7.021712E-01
+1.008605E-01
diff --git a/tests/test_score_fission/settings.xml b/tests/test_score_fission/settings.xml
deleted file mode 100644
index 517637a59f..0000000000
--- a/tests/test_score_fission/settings.xml
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0"?>
-<settings>
-
-  <eigenvalue>
-    <batches>10</batches>
-    <inactive>5</inactive>
-    <particles>100</particles>
-  </eigenvalue>
-
-  <source>
-    <space type="box">
-      <parameters>
-        -160 -160 -183
-         160  160  183
-      </parameters>
-    </space>
-  </source>
-
-</settings>
diff --git a/tests/test_score_fission/tallies.xml b/tests/test_score_fission/tallies.xml
deleted file mode 100644
index a8b57f9116..0000000000
--- a/tests/test_score_fission/tallies.xml
+++ /dev/null
@@ -1,21 +0,0 @@
-<?xml version="1.0"?>
-<tallies>
-
-  <tally id="1">
-    <filter type="cell" bins="21 22 23 27" />
-    <scores>fission</scores>
-  </tally>
-
-  <tally id="2">
-    <filter type="cell" bins="21 22 23 27" />
-    <estimator>analog</estimator>
-    <scores>fission</scores>
-  </tally>
-
-  <tally id="3">
-    <filter type="cell" bins="21 22 23 27" />
-    <estimator>collision</estimator>
-    <scores>fission</scores>
-  </tally>
-
-</tallies>
diff --git a/tests/test_score_fission/test_score_fission.py b/tests/test_score_fission/test_score_fission.py
index 1777db993e..4026c0cabf 100644
--- a/tests/test_score_fission/test_score_fission.py
+++ b/tests/test_score_fission/test_score_fission.py
@@ -1,10 +1,32 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
-from testing_harness import TestHarness
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness, PyAPITestHarness
+import openmc
+
+
+class ScoreFissionTestHarness(PyAPITestHarness):
+    def _build_inputs(self):
+        filt = openmc.Filter(type='cell', bins=(21, 22, 23, 27))
+        tallies = [openmc.Tally(tally_id=i) for i in range(1, 4)]
+        [t.add_filter(filt) for t in tallies]
+        [t.add_score('fission') for t in tallies]
+        tallies[0].estimator = 'tracklength'
+        tallies[1].estimator = 'analog'
+        tallies[2].estimator = 'collision'
+        self._input_set.tallies = openmc.TalliesFile()
+        [self._input_set.tallies.add_tally(t) for t in tallies]
+
+        super(ScoreFissionTestHarness, self)._build_inputs()
+
+    def _cleanup(self):
+        super(ScoreFissionTestHarness, self)._cleanup()
+        f = os.path.join(os.getcwd(), 'tallies.xml')
+        if os.path.exists(f): os.remove(f)
 
 
 if __name__ == '__main__':
-    harness = TestHarness('statepoint.10.*', True)
+    harness = ScoreFissionTestHarness('statepoint.10.*', True)
     harness.main()
diff --git a/tests/test_score_flux/geometry.xml b/tests/test_score_flux/geometry.xml
deleted file mode 100644
index f6f067aadd..0000000000
--- a/tests/test_score_flux/geometry.xml
+++ /dev/null
@@ -1,181 +0,0 @@
-<?xml version="1.0"?>
-<geometry>
-
-  <surface id="1" type="z-cylinder" coeffs="0. 0. 0.41" />
-  <surface id="2" type="z-cylinder" coeffs="0. 0. 0.475" />
-  <surface id="3" type="z-cylinder" coeffs="0. 0. 0.56" />
-  <surface id="4" type="z-cylinder" coeffs="0. 0. 0.62" />
-  <surface id="5" type="z-cylinder" coeffs="0. 0. 187.6" />
-  <surface id="6" type="z-cylinder" coeffs="0. 0. 209.0" />
-  <surface id="7" type="z-cylinder" coeffs="0. 0. 229.0" />
-  <surface id="8" type="z-cylinder" coeffs="0. 0. 249.0" boundary="vacuum" />
-
-  <surface id="31" type="z-plane" coeffs="-229.0" boundary="vacuum" />
-  <surface id="32" type="z-plane" coeffs="-199.0" />
-  <surface id="33" type="z-plane" coeffs="-193.0" />
-  <surface id="34" type="z-plane" coeffs="-183.0" />
-  <surface id="35" type="z-plane" coeffs="0.0" />
-  <surface id="36" type="z-plane" coeffs="183.0" />
-  <surface id="37" type="z-plane" coeffs="203.0" />
-  <surface id="38" type="z-plane" coeffs="215.0" />
-  <surface id="39" type="z-plane" coeffs="223.0" boundary="vacuum" />
-
-  <!-- All geometry on base universe -->
-  <cell id="1"  fill="200"    region="  -6 34 -35" /> <!-- Lower core -->
-  <cell id="2"  fill="201"    region="  -6 35 -36" /> <!-- Upper core -->
-  <cell id="3"  material="8"  region="  -7 31 -32" /> <!-- Lower core plate region -->
-  <cell id="4"  material="9"  region="  -5 32 -33" /> <!-- Bottom nozzle region -->
-  <cell id="5"  material="12" region="  -5 33 -34" /> <!-- Bottom FA region -->
-  <cell id="6"  material="11" region="  -5 36 -37" /> <!-- Top FA region -->
-  <cell id="7"  material="10" region="  -5 37 -38" /> <!-- Top nozzle region -->
-  <cell id="8"  material="7"  region="  -7 38 -39" /> <!-- Upper plate region -->
-  <cell id="9"  material="4"  region="6 -7 32 -38" /> <!-- Downcomer -->
-  <cell id="10" material="5"  region="7 -8 31 -39" /> <!-- RPV -->
-  <cell id="11" material="6"  region="5 -6 32 -34" /> <!-- Bottom of radial reflector -->
-  <cell id="12" material="7"  region="5 -6 36 -38" /> <!-- Top of radial reflector -->
-
-  <!-- Fuel pin, cladding, cold water -->
-  <cell id="21" universe="1" material="1" region="-1"   />
-  <cell id="22" universe="1" material="2" region="1 -2" />
-  <cell id="23" universe="1" material="3" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="24" universe="2" material="3" region="-3"   />
-  <cell id="25" universe="2" material="2" region="3 -4" />
-  <cell id="26" universe="2" material="3" region="4"    />
-
-  <!-- Fuel pin, cladding, hot water -->
-  <cell id="27" universe="3" material="1" region="-1"   />
-  <cell id="28" universe="3" material="2" region="1 -2" />
-  <cell id="29" universe="3" material="4" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="30" universe="4" material="4" region="-3"   />
-  <cell id="31" universe="4" material="2" region="3 -4" />
-  <cell id="32" universe="4" material="4" region="4"    />
-
-  <!-- cell for water assembly (cold) -->
-  <cell id="50" universe="5" material="4" region="34 -35" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="60" universe="6" fill="100"   region="34 -35" />
-
-  <!-- cell for water assembly (hot) -->
-  <cell id="70" universe="7" material="3" region="35 -36" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="80" universe="8" fill="101"   region="35 -36" />
-
-  <!-- Fuel Assembly (Lower Half) -->
-  <lattice id="100">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-    </universes>
-  </lattice>
-
-  <!-- Fuel Assembly (Upper Half) -->
-  <lattice id="101">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Lower Half) -->
-  <lattice id="200">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Upper Half) -->
-  <lattice id="201">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-    </universes>
-  </lattice>
-
-</geometry>
diff --git a/tests/test_score_flux/inputs_true.dat b/tests/test_score_flux/inputs_true.dat
new file mode 100644
index 0000000000..fe2b65dfe1
--- /dev/null
+++ b/tests/test_score_flux/inputs_true.dat
@@ -0,0 +1 @@
+23454cbb568dd5f8569f228b3d0e6d180144279005521ad009d6a99384db79330b274edc431133f5e304a6750bef2b85bfc5af46258a75ce3f0673dd0ec0c54c
\ No newline at end of file
diff --git a/tests/test_score_flux/materials.xml b/tests/test_score_flux/materials.xml
deleted file mode 100644
index 9c0b74f3f1..0000000000
--- a/tests/test_score_flux/materials.xml
+++ /dev/null
@@ -1,272 +0,0 @@
-<?xml version="1.0"?>
-<materials>
-
-  <default_xs>71c</default_xs>
-
-  <!-- Fuel composition -->
-  <material id="1">
-    <density value="10.062" units="g/cm3" />
-    <nuclide name="U-234"   ao="4.9476e-6" />
-    <nuclide name="U-235"   ao="4.8218e-4" />
-    <nuclide name="U-236"   ao="9.0402e-5" />
-    <nuclide name="U-238"   ao="2.1504e-2" />
-    <nuclide name="Np-237"  ao="7.3733e-6" />
-    <nuclide name="Pu-238"  ao="1.5148e-6" />
-    <nuclide name="Pu-239"  ao="1.3955e-4" />
-    <nuclide name="Pu-240"  ao="3.4405e-5" />
-    <nuclide name="Pu-241"  ao="2.1439e-5" />
-    <nuclide name="Pu-242"  ao="3.7422e-6" />
-    <nuclide name="Am-241"  ao="4.5041e-7" />
-    <nuclide name="Am-242m" ao="9.2301e-9" />
-    <nuclide name="Am-243"  ao="4.7878e-7" />
-    <nuclide name="Cm-242"  ao="1.0485e-7" />
-    <nuclide name="Cm-243"  ao="1.4268e-9" />
-    <nuclide name="Cm-244"  ao="8.8756e-8" />
-    <nuclide name="Cm-245"  ao="3.5285e-9" />
-    <nuclide name="Mo-95"   ao="2.6497e-5" />
-    <nuclide name="Tc-99"   ao="3.2772e-5" />
-    <nuclide name="Ru-101"  ao="3.0742e-5" />
-    <nuclide name="Ru-103"  ao="2.3505e-6" />
-    <nuclide name="Ag-109"  ao="2.0009e-6" />
-    <nuclide name="Xe-135"  ao="1.0801e-8" />
-    <nuclide name="Cs-133"  ao="3.4612e-5" />
-    <nuclide name="Nd-143"  ao="2.6078e-5" />
-    <nuclide name="Nd-145"  ao="1.9898e-5" />
-    <nuclide name="Sm-147"  ao="1.6128e-6" />
-    <nuclide name="Sm-149"  ao="1.1627e-7" />
-    <nuclide name="Sm-150"  ao="7.1727e-6" />
-    <nuclide name="Sm-151"  ao="5.4947e-7" />
-    <nuclide name="Sm-152"  ao="3.0221e-6" />
-    <nuclide name="Eu-153"  ao="2.6209e-6" />
-    <nuclide name="Gd-155"  ao="1.5369e-9" />
-    <nuclide name="O-16"    ao="4.5737e-2" />
-  </material>
-
-  <!-- Cladding composition -->
-  <material id="2">
-    <density value="5.77" units="g/cm3" />
-    <nuclide name="Zr-90" ao="0.5145" />
-    <nuclide name="Zr-91" ao="0.1122" />
-    <nuclide name="Zr-92" ao="0.1715" />
-    <nuclide name="Zr-94" ao="0.1738" />
-    <nuclide name="Zr-96" ao="0.0280" />
-  </material>
-
-  <!-- Cold borated water -->
-  <material id="3">
-    <density value="0.07416" units="atom/b-cm" />
-    <nuclide name="H-1" ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Hot borated water -->
-  <material id="4">
-    <density value="0.06614" units="atom/b-cm" />
-    <nuclide name="H-1"  ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- RPV Composition -->
-  <material id="5">
-    <density value="7.9" units="g/cm3" />
-    <nuclide name="Fe-54"  wo="0.05437098" />
-    <nuclide name="Fe-56"  wo="0.88500663" />
-    <nuclide name="Fe-57"  wo="0.0208008" />
-    <nuclide name="Fe-58"  wo="0.00282159" />
-    <nuclide name="Ni-58"  wo="0.0067198" />
-    <nuclide name="Ni-60"  wo="0.0026776" />
-    <nuclide name="Ni-61"  wo="0.0001183" />
-    <nuclide name="Ni-62"  wo="0.0003835" />
-    <nuclide name="Ni-64"  wo="0.0001008" />
-    <nuclide name="Mn-55"  wo="0.01" />
-    <nuclide name="Mo-92"  wo="0.000849" />
-    <nuclide name="Mo-94"  wo="0.0005418" />
-    <nuclide name="Mo-95"  wo="0.0009438" />
-    <nuclide name="Mo-96"  wo="0.0010002" />
-    <nuclide name="Mo-97"  wo="0.0005796" />
-    <nuclide name="Mo-98"  wo="0.0014814" />
-    <nuclide name="Mo-100" wo="0.0006042" />
-    <nuclide name="Si-28"  wo="0.00367464" />
-    <nuclide name="Si-29"  wo="0.00019336" />
-    <nuclide name="Si-30"  wo="0.000132" />
-    <nuclide name="Cr-50"  wo="0.00010435" />
-    <nuclide name="Cr-52"  wo="0.002092475" />
-    <nuclide name="Cr-53"  wo="0.00024185" />
-    <nuclide name="Cr-54"  wo="6.1325e-05" />
-    <nuclide name="C-Nat"  wo="0.0025" />
-    <nuclide name="Cu-63"  wo="0.0013696" />
-    <nuclide name="Cu-65"  wo="0.0006304" />
-  </material>
-
-  <!-- Lower radial reflector -->
-  <material id="6">
-    <density value="4.32" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0095661" />
-    <nuclide name="O-16"  wo="0.0759107" />
-    <nuclide name="B-10"  wo="3.08409e-5" />
-    <nuclide name="B-11"  wo="1.40499e-4" />
-    <nuclide name="Fe-54" wo="0.035620772088" />
-    <nuclide name="Fe-56" wo="0.579805982228" />
-    <nuclide name="Fe-57" wo="0.01362750048" />
-    <nuclide name="Fe-58" wo="0.001848545204" />
-    <nuclide name="Ni-58" wo="0.055298376566" />
-    <nuclide name="Ni-60" wo="0.022034425592" />
-    <nuclide name="Ni-61" wo="0.000973510811" />
-    <nuclide name="Ni-62" wo="0.003155886695" />
-    <nuclide name="Ni-64" wo="0.000829500336" />
-    <nuclide name="Mn-55" wo="0.0182870" />
-    <nuclide name="Si-28" wo="0.00839976771" />
-    <nuclide name="Si-29" wo="0.00044199679" />
-    <nuclide name="Si-30" wo="0.0003017355" />
-    <nuclide name="Cr-50" wo="0.007251360806" />
-    <nuclide name="Cr-52" wo="0.145407678031" />
-    <nuclide name="Cr-53" wo="0.016806340306" />
-    <nuclide name="Cr-54" wo="0.004261520857" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Upper radial reflector / Top plate region -->
-  <material id="7">
-    <density value="4.28" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0086117" />
-    <nuclide name="O-16"  wo="0.0683369" />
-    <nuclide name="B-10"  wo="2.77638e-5" />
-    <nuclide name="B-11"  wo="1.26481e-4" />
-    <nuclide name="Fe-54" wo="0.035953677186" />
-    <nuclide name="Fe-56" wo="0.585224740891" />
-    <nuclide name="Fe-57" wo="0.01375486056" />
-    <nuclide name="Fe-58" wo="0.001865821363" />
-    <nuclide name="Ni-58" wo="0.055815129186" />
-    <nuclide name="Ni-60" wo="0.022240333032" />
-    <nuclide name="Ni-61" wo="0.000982608081" />
-    <nuclide name="Ni-62" wo="0.003185377845" />
-    <nuclide name="Ni-64" wo="0.000837251856" />
-    <nuclide name="Mn-55" wo="0.0184579" />
-    <nuclide name="Si-28" wo="0.00847831314" />
-    <nuclide name="Si-29" wo="0.00044612986" />
-    <nuclide name="Si-30" wo="0.000304557" />
-    <nuclide name="Cr-50" wo="0.00731912987" />
-    <nuclide name="Cr-52" wo="0.146766614995" />
-    <nuclide name="Cr-53" wo="0.01696340737" />
-    <nuclide name="Cr-54" wo="0.004301347765" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom plate region -->
-  <material id="8">
-    <density value="7.184" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0011505" />
-    <nuclide name="O-16"  wo="0.0091296" />
-    <nuclide name="B-10"  wo="3.70915e-6" />
-    <nuclide name="B-11"  wo="1.68974e-5" />
-    <nuclide name="Fe-54" wo="0.03855611055" />
-    <nuclide name="Fe-56" wo="0.627585036425" />
-    <nuclide name="Fe-57" wo="0.014750478" />
-    <nuclide name="Fe-58" wo="0.002000875025" />
-    <nuclide name="Ni-58" wo="0.059855207342" />
-    <nuclide name="Ni-60" wo="0.023850159704" />
-    <nuclide name="Ni-61" wo="0.001053732407" />
-    <nuclide name="Ni-62" wo="0.003415945715" />
-    <nuclide name="Ni-64" wo="0.000897854832" />
-    <nuclide name="Mn-55" wo="0.0197940" />
-    <nuclide name="Si-28" wo="0.00909197802" />
-    <nuclide name="Si-29" wo="0.00047842098" />
-    <nuclide name="Si-30" wo="0.000326601" />
-    <nuclide name="Cr-50" wo="0.007848910646" />
-    <nuclide name="Cr-52" wo="0.157390026871" />
-    <nuclide name="Cr-53" wo="0.018191270146" />
-    <nuclide name="Cr-54" wo="0.004612692337" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom nozzle region -->
-  <material id="9">
-    <density value="2.53" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0245014" />
-    <nuclide name="O-16"  wo="0.1944274" />
-    <nuclide name="B-10"  wo="7.89917e-5" />
-    <nuclide name="B-11"  wo="3.59854e-4" />
-    <nuclide name="Fe-54" wo="0.030411411144" />
-    <nuclide name="Fe-56" wo="0.495012237964" />
-    <nuclide name="Fe-57" wo="0.01163454624" />
-    <nuclide name="Fe-58" wo="0.001578204652" />
-    <nuclide name="Ni-58" wo="0.047211231662" />
-    <nuclide name="Ni-60" wo="0.018811987544" />
-    <nuclide name="Ni-61" wo="0.000831139127" />
-    <nuclide name="Ni-62" wo="0.002694352115" />
-    <nuclide name="Ni-64" wo="0.000708189552" />
-    <nuclide name="Mn-55" wo="0.0156126" />
-    <nuclide name="Si-28" wo="0.007171335558" />
-    <nuclide name="Si-29" wo="0.000377356542" />
-    <nuclide name="Si-30" wo="0.0002576079" />
-    <nuclide name="Cr-50" wo="0.006190885148" />
-    <nuclide name="Cr-52" wo="0.124142524198" />
-    <nuclide name="Cr-53" wo="0.014348496148" />
-    <nuclide name="Cr-54" wo="0.003638294506" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top nozzle region -->
-  <material id="10">
-    <density value="1.746" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0358870" />
-    <nuclide name="O-16"  wo="0.2847761" />
-    <nuclide name="B-10"  wo="1.15699e-4" />
-    <nuclide name="B-11"  wo="5.27075e-4" />
-    <nuclide name="Fe-54" wo="0.02644016154" />
-    <nuclide name="Fe-56" wo="0.43037146399" />
-    <nuclide name="Fe-57" wo="0.0101152584" />
-    <nuclide name="Fe-58" wo="0.00137211607" />
-    <nuclide name="Ni-58" wo="0.04104621835" />
-    <nuclide name="Ni-60" wo="0.0163554502" />
-    <nuclide name="Ni-61" wo="0.000722605975" />
-    <nuclide name="Ni-62" wo="0.002342513875" />
-    <nuclide name="Ni-64" wo="0.0006157116" />
-    <nuclide name="Mn-55" wo="0.0135739" />
-    <nuclide name="Si-28" wo="0.006234853554" />
-    <nuclide name="Si-29" wo="0.000328078746" />
-    <nuclide name="Si-30" wo="0.0002239677" />
-    <nuclide name="Cr-50" wo="0.005382452306" />
-    <nuclide name="Cr-52" wo="0.107931450781" />
-    <nuclide name="Cr-53" wo="0.012474806806" />
-    <nuclide name="Cr-54" wo="0.003163190107" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top of Fuel Assemblies -->
-  <material id="11">
-    <density value="3.044" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0162913" />
-    <nuclide name="O-16"  wo="0.1292776" />
-    <nuclide name="B-10"  wo="5.25228e-5" />
-    <nuclide name="B-11"  wo="2.39272e-4" />
-    <nuclide name="Zr-90" wo="0.43313403903" />
-    <nuclide name="Zr-91" wo="0.09549277374" />
-    <nuclide name="Zr-92" wo="0.14759527104" />
-    <nuclide name="Zr-94" wo="0.15280552077" />
-    <nuclide name="Zr-96" wo="0.02511169542" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom of Fuel Assemblies -->
-  <material id="12">
-    <density value="1.762" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0292856" />
-    <nuclide name="O-16"  wo="0.2323919" />
-    <nuclide name="B-10"  wo="9.44159e-5" />
-    <nuclide name="B-11"  wo="4.30120e-4" />
-    <nuclide name="Zr-90" wo="0.3741373658" />
-    <nuclide name="Zr-91" wo="0.0824858164" />
-    <nuclide name="Zr-92" wo="0.1274914944" />
-    <nuclide name="Zr-94" wo="0.1319920622" />
-    <nuclide name="Zr-96" wo="0.0216912612" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-</materials>
diff --git a/tests/test_score_flux/results_true.dat b/tests/test_score_flux/results_true.dat
index 31ca238d48..5c366ea8c7 100644
--- a/tests/test_score_flux/results_true.dat
+++ b/tests/test_score_flux/results_true.dat
@@ -1,41 +1,41 @@
 k-combined:
-1.005983E+00 2.248579E-02
+9.903196E-01 4.279617E-02
 tally 1:
-3.224218E+01
-2.217821E+02
-1.079687E+01
-2.494701E+01
-5.252579E+01
-5.951604E+02
-3.325822E+01
-2.414028E+02
-1.145800E+01
-2.880575E+01
-5.605671E+01
-6.804062E+02
+3.890713E+01
+3.046363E+02
+1.366220E+01
+3.758161E+01
+6.561669E+01
+8.680729E+02
+2.382728E+01
+1.170590E+02
+8.047875E+00
+1.334796E+01
+4.056568E+01
+3.389623E+02
 tally 2:
-3.077754E+01
-2.017424E+02
-1.172238E+01
-3.139127E+01
-5.231699E+01
-5.870469E+02
-3.259142E+01
-2.336719E+02
-1.040924E+01
-2.432332E+01
-5.709679E+01
-6.978668E+02
+3.862543E+01
+2.993190E+02
+1.438678E+01
+4.193571E+01
+6.400634E+01
+8.298077E+02
+2.426423E+01
+1.215124E+02
+7.600812E+00
+1.199814E+01
+4.104875E+01
+3.455300E+02
 tally 3:
-3.077754E+01
-2.017424E+02
-1.172238E+01
-3.139127E+01
-5.231699E+01
-5.870469E+02
-3.259142E+01
-2.336719E+02
-1.040924E+01
-2.432332E+01
-5.709679E+01
-6.978668E+02
+3.862543E+01
+2.993190E+02
+1.438678E+01
+4.193571E+01
+6.400634E+01
+8.298077E+02
+2.426423E+01
+1.215124E+02
+7.600812E+00
+1.199814E+01
+4.104875E+01
+3.455300E+02
diff --git a/tests/test_score_flux/settings.xml b/tests/test_score_flux/settings.xml
deleted file mode 100644
index 517637a59f..0000000000
--- a/tests/test_score_flux/settings.xml
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0"?>
-<settings>
-
-  <eigenvalue>
-    <batches>10</batches>
-    <inactive>5</inactive>
-    <particles>100</particles>
-  </eigenvalue>
-
-  <source>
-    <space type="box">
-      <parameters>
-        -160 -160 -183
-         160  160  183
-      </parameters>
-    </space>
-  </source>
-
-</settings>
diff --git a/tests/test_score_flux/tallies.xml b/tests/test_score_flux/tallies.xml
deleted file mode 100644
index bcde40c75d..0000000000
--- a/tests/test_score_flux/tallies.xml
+++ /dev/null
@@ -1,21 +0,0 @@
-<?xml version="1.0"?>
-<tallies>
-
-  <tally id="1">
-    <filter type="cell" bins="21 22 23 27 28 29" />
-    <scores>flux</scores>
-  </tally>
-
-  <tally id="2">
-    <filter type="cell" bins="21 22 23 27 28 29" />
-    <scores>flux</scores>
-    <estimator>analog</estimator>
-  </tally>
-
-  <tally id="3">
-    <filter type="cell" bins="21 22 23 27 28 29" />
-    <scores>flux</scores>
-    <estimator>collision</estimator>
-  </tally>
-
-</tallies>
diff --git a/tests/test_score_flux/test_score_flux.py b/tests/test_score_flux/test_score_flux.py
index 1777db993e..1eea55f45f 100644
--- a/tests/test_score_flux/test_score_flux.py
+++ b/tests/test_score_flux/test_score_flux.py
@@ -1,10 +1,32 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
-from testing_harness import TestHarness
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness, PyAPITestHarness
+import openmc
+
+
+class ScoreFluxTestHarness(PyAPITestHarness):
+    def _build_inputs(self):
+        filt = openmc.Filter(type='cell', bins=(21, 22, 23, 27, 28, 29))
+        tallies = [openmc.Tally(tally_id=i) for i in range(1, 4)]
+        [t.add_filter(filt) for t in tallies]
+        [t.add_score('flux') for t in tallies]
+        tallies[0].estimator = 'tracklength'
+        tallies[1].estimator = 'analog'
+        tallies[2].estimator = 'collision'
+        self._input_set.tallies = openmc.TalliesFile()
+        [self._input_set.tallies.add_tally(t) for t in tallies]
+
+        super(ScoreFluxTestHarness, self)._build_inputs()
+
+    def _cleanup(self):
+        super(ScoreFluxTestHarness, self)._cleanup()
+        f = os.path.join(os.getcwd(), 'tallies.xml')
+        if os.path.exists(f): os.remove(f)
 
 
 if __name__ == '__main__':
-    harness = TestHarness('statepoint.10.*', True)
+    harness = ScoreFluxTestHarness('statepoint.10.*', True)
     harness.main()
diff --git a/tests/test_score_flux_yn/geometry.xml b/tests/test_score_flux_yn/geometry.xml
deleted file mode 100644
index f6f067aadd..0000000000
--- a/tests/test_score_flux_yn/geometry.xml
+++ /dev/null
@@ -1,181 +0,0 @@
-<?xml version="1.0"?>
-<geometry>
-
-  <surface id="1" type="z-cylinder" coeffs="0. 0. 0.41" />
-  <surface id="2" type="z-cylinder" coeffs="0. 0. 0.475" />
-  <surface id="3" type="z-cylinder" coeffs="0. 0. 0.56" />
-  <surface id="4" type="z-cylinder" coeffs="0. 0. 0.62" />
-  <surface id="5" type="z-cylinder" coeffs="0. 0. 187.6" />
-  <surface id="6" type="z-cylinder" coeffs="0. 0. 209.0" />
-  <surface id="7" type="z-cylinder" coeffs="0. 0. 229.0" />
-  <surface id="8" type="z-cylinder" coeffs="0. 0. 249.0" boundary="vacuum" />
-
-  <surface id="31" type="z-plane" coeffs="-229.0" boundary="vacuum" />
-  <surface id="32" type="z-plane" coeffs="-199.0" />
-  <surface id="33" type="z-plane" coeffs="-193.0" />
-  <surface id="34" type="z-plane" coeffs="-183.0" />
-  <surface id="35" type="z-plane" coeffs="0.0" />
-  <surface id="36" type="z-plane" coeffs="183.0" />
-  <surface id="37" type="z-plane" coeffs="203.0" />
-  <surface id="38" type="z-plane" coeffs="215.0" />
-  <surface id="39" type="z-plane" coeffs="223.0" boundary="vacuum" />
-
-  <!-- All geometry on base universe -->
-  <cell id="1"  fill="200"    region="  -6 34 -35" /> <!-- Lower core -->
-  <cell id="2"  fill="201"    region="  -6 35 -36" /> <!-- Upper core -->
-  <cell id="3"  material="8"  region="  -7 31 -32" /> <!-- Lower core plate region -->
-  <cell id="4"  material="9"  region="  -5 32 -33" /> <!-- Bottom nozzle region -->
-  <cell id="5"  material="12" region="  -5 33 -34" /> <!-- Bottom FA region -->
-  <cell id="6"  material="11" region="  -5 36 -37" /> <!-- Top FA region -->
-  <cell id="7"  material="10" region="  -5 37 -38" /> <!-- Top nozzle region -->
-  <cell id="8"  material="7"  region="  -7 38 -39" /> <!-- Upper plate region -->
-  <cell id="9"  material="4"  region="6 -7 32 -38" /> <!-- Downcomer -->
-  <cell id="10" material="5"  region="7 -8 31 -39" /> <!-- RPV -->
-  <cell id="11" material="6"  region="5 -6 32 -34" /> <!-- Bottom of radial reflector -->
-  <cell id="12" material="7"  region="5 -6 36 -38" /> <!-- Top of radial reflector -->
-
-  <!-- Fuel pin, cladding, cold water -->
-  <cell id="21" universe="1" material="1" region="-1"   />
-  <cell id="22" universe="1" material="2" region="1 -2" />
-  <cell id="23" universe="1" material="3" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="24" universe="2" material="3" region="-3"   />
-  <cell id="25" universe="2" material="2" region="3 -4" />
-  <cell id="26" universe="2" material="3" region="4"    />
-
-  <!-- Fuel pin, cladding, hot water -->
-  <cell id="27" universe="3" material="1" region="-1"   />
-  <cell id="28" universe="3" material="2" region="1 -2" />
-  <cell id="29" universe="3" material="4" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="30" universe="4" material="4" region="-3"   />
-  <cell id="31" universe="4" material="2" region="3 -4" />
-  <cell id="32" universe="4" material="4" region="4"    />
-
-  <!-- cell for water assembly (cold) -->
-  <cell id="50" universe="5" material="4" region="34 -35" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="60" universe="6" fill="100"   region="34 -35" />
-
-  <!-- cell for water assembly (hot) -->
-  <cell id="70" universe="7" material="3" region="35 -36" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="80" universe="8" fill="101"   region="35 -36" />
-
-  <!-- Fuel Assembly (Lower Half) -->
-  <lattice id="100">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-    </universes>
-  </lattice>
-
-  <!-- Fuel Assembly (Upper Half) -->
-  <lattice id="101">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Lower Half) -->
-  <lattice id="200">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Upper Half) -->
-  <lattice id="201">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-    </universes>
-  </lattice>
-
-</geometry>
diff --git a/tests/test_score_flux_yn/inputs_true.dat b/tests/test_score_flux_yn/inputs_true.dat
new file mode 100644
index 0000000000..9b9313a6ab
--- /dev/null
+++ b/tests/test_score_flux_yn/inputs_true.dat
@@ -0,0 +1 @@
+977c9d76d335d79fa561f9eab8a575a118f900818759b96b6fbdbf8d06a012a44d5892bbb22292f9b730745d86859ffcba6b16b59096eff587fca2a5d6629cf5
\ No newline at end of file
diff --git a/tests/test_score_flux_yn/materials.xml b/tests/test_score_flux_yn/materials.xml
deleted file mode 100644
index 9c0b74f3f1..0000000000
--- a/tests/test_score_flux_yn/materials.xml
+++ /dev/null
@@ -1,272 +0,0 @@
-<?xml version="1.0"?>
-<materials>
-
-  <default_xs>71c</default_xs>
-
-  <!-- Fuel composition -->
-  <material id="1">
-    <density value="10.062" units="g/cm3" />
-    <nuclide name="U-234"   ao="4.9476e-6" />
-    <nuclide name="U-235"   ao="4.8218e-4" />
-    <nuclide name="U-236"   ao="9.0402e-5" />
-    <nuclide name="U-238"   ao="2.1504e-2" />
-    <nuclide name="Np-237"  ao="7.3733e-6" />
-    <nuclide name="Pu-238"  ao="1.5148e-6" />
-    <nuclide name="Pu-239"  ao="1.3955e-4" />
-    <nuclide name="Pu-240"  ao="3.4405e-5" />
-    <nuclide name="Pu-241"  ao="2.1439e-5" />
-    <nuclide name="Pu-242"  ao="3.7422e-6" />
-    <nuclide name="Am-241"  ao="4.5041e-7" />
-    <nuclide name="Am-242m" ao="9.2301e-9" />
-    <nuclide name="Am-243"  ao="4.7878e-7" />
-    <nuclide name="Cm-242"  ao="1.0485e-7" />
-    <nuclide name="Cm-243"  ao="1.4268e-9" />
-    <nuclide name="Cm-244"  ao="8.8756e-8" />
-    <nuclide name="Cm-245"  ao="3.5285e-9" />
-    <nuclide name="Mo-95"   ao="2.6497e-5" />
-    <nuclide name="Tc-99"   ao="3.2772e-5" />
-    <nuclide name="Ru-101"  ao="3.0742e-5" />
-    <nuclide name="Ru-103"  ao="2.3505e-6" />
-    <nuclide name="Ag-109"  ao="2.0009e-6" />
-    <nuclide name="Xe-135"  ao="1.0801e-8" />
-    <nuclide name="Cs-133"  ao="3.4612e-5" />
-    <nuclide name="Nd-143"  ao="2.6078e-5" />
-    <nuclide name="Nd-145"  ao="1.9898e-5" />
-    <nuclide name="Sm-147"  ao="1.6128e-6" />
-    <nuclide name="Sm-149"  ao="1.1627e-7" />
-    <nuclide name="Sm-150"  ao="7.1727e-6" />
-    <nuclide name="Sm-151"  ao="5.4947e-7" />
-    <nuclide name="Sm-152"  ao="3.0221e-6" />
-    <nuclide name="Eu-153"  ao="2.6209e-6" />
-    <nuclide name="Gd-155"  ao="1.5369e-9" />
-    <nuclide name="O-16"    ao="4.5737e-2" />
-  </material>
-
-  <!-- Cladding composition -->
-  <material id="2">
-    <density value="5.77" units="g/cm3" />
-    <nuclide name="Zr-90" ao="0.5145" />
-    <nuclide name="Zr-91" ao="0.1122" />
-    <nuclide name="Zr-92" ao="0.1715" />
-    <nuclide name="Zr-94" ao="0.1738" />
-    <nuclide name="Zr-96" ao="0.0280" />
-  </material>
-
-  <!-- Cold borated water -->
-  <material id="3">
-    <density value="0.07416" units="atom/b-cm" />
-    <nuclide name="H-1" ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Hot borated water -->
-  <material id="4">
-    <density value="0.06614" units="atom/b-cm" />
-    <nuclide name="H-1"  ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- RPV Composition -->
-  <material id="5">
-    <density value="7.9" units="g/cm3" />
-    <nuclide name="Fe-54"  wo="0.05437098" />
-    <nuclide name="Fe-56"  wo="0.88500663" />
-    <nuclide name="Fe-57"  wo="0.0208008" />
-    <nuclide name="Fe-58"  wo="0.00282159" />
-    <nuclide name="Ni-58"  wo="0.0067198" />
-    <nuclide name="Ni-60"  wo="0.0026776" />
-    <nuclide name="Ni-61"  wo="0.0001183" />
-    <nuclide name="Ni-62"  wo="0.0003835" />
-    <nuclide name="Ni-64"  wo="0.0001008" />
-    <nuclide name="Mn-55"  wo="0.01" />
-    <nuclide name="Mo-92"  wo="0.000849" />
-    <nuclide name="Mo-94"  wo="0.0005418" />
-    <nuclide name="Mo-95"  wo="0.0009438" />
-    <nuclide name="Mo-96"  wo="0.0010002" />
-    <nuclide name="Mo-97"  wo="0.0005796" />
-    <nuclide name="Mo-98"  wo="0.0014814" />
-    <nuclide name="Mo-100" wo="0.0006042" />
-    <nuclide name="Si-28"  wo="0.00367464" />
-    <nuclide name="Si-29"  wo="0.00019336" />
-    <nuclide name="Si-30"  wo="0.000132" />
-    <nuclide name="Cr-50"  wo="0.00010435" />
-    <nuclide name="Cr-52"  wo="0.002092475" />
-    <nuclide name="Cr-53"  wo="0.00024185" />
-    <nuclide name="Cr-54"  wo="6.1325e-05" />
-    <nuclide name="C-Nat"  wo="0.0025" />
-    <nuclide name="Cu-63"  wo="0.0013696" />
-    <nuclide name="Cu-65"  wo="0.0006304" />
-  </material>
-
-  <!-- Lower radial reflector -->
-  <material id="6">
-    <density value="4.32" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0095661" />
-    <nuclide name="O-16"  wo="0.0759107" />
-    <nuclide name="B-10"  wo="3.08409e-5" />
-    <nuclide name="B-11"  wo="1.40499e-4" />
-    <nuclide name="Fe-54" wo="0.035620772088" />
-    <nuclide name="Fe-56" wo="0.579805982228" />
-    <nuclide name="Fe-57" wo="0.01362750048" />
-    <nuclide name="Fe-58" wo="0.001848545204" />
-    <nuclide name="Ni-58" wo="0.055298376566" />
-    <nuclide name="Ni-60" wo="0.022034425592" />
-    <nuclide name="Ni-61" wo="0.000973510811" />
-    <nuclide name="Ni-62" wo="0.003155886695" />
-    <nuclide name="Ni-64" wo="0.000829500336" />
-    <nuclide name="Mn-55" wo="0.0182870" />
-    <nuclide name="Si-28" wo="0.00839976771" />
-    <nuclide name="Si-29" wo="0.00044199679" />
-    <nuclide name="Si-30" wo="0.0003017355" />
-    <nuclide name="Cr-50" wo="0.007251360806" />
-    <nuclide name="Cr-52" wo="0.145407678031" />
-    <nuclide name="Cr-53" wo="0.016806340306" />
-    <nuclide name="Cr-54" wo="0.004261520857" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Upper radial reflector / Top plate region -->
-  <material id="7">
-    <density value="4.28" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0086117" />
-    <nuclide name="O-16"  wo="0.0683369" />
-    <nuclide name="B-10"  wo="2.77638e-5" />
-    <nuclide name="B-11"  wo="1.26481e-4" />
-    <nuclide name="Fe-54" wo="0.035953677186" />
-    <nuclide name="Fe-56" wo="0.585224740891" />
-    <nuclide name="Fe-57" wo="0.01375486056" />
-    <nuclide name="Fe-58" wo="0.001865821363" />
-    <nuclide name="Ni-58" wo="0.055815129186" />
-    <nuclide name="Ni-60" wo="0.022240333032" />
-    <nuclide name="Ni-61" wo="0.000982608081" />
-    <nuclide name="Ni-62" wo="0.003185377845" />
-    <nuclide name="Ni-64" wo="0.000837251856" />
-    <nuclide name="Mn-55" wo="0.0184579" />
-    <nuclide name="Si-28" wo="0.00847831314" />
-    <nuclide name="Si-29" wo="0.00044612986" />
-    <nuclide name="Si-30" wo="0.000304557" />
-    <nuclide name="Cr-50" wo="0.00731912987" />
-    <nuclide name="Cr-52" wo="0.146766614995" />
-    <nuclide name="Cr-53" wo="0.01696340737" />
-    <nuclide name="Cr-54" wo="0.004301347765" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom plate region -->
-  <material id="8">
-    <density value="7.184" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0011505" />
-    <nuclide name="O-16"  wo="0.0091296" />
-    <nuclide name="B-10"  wo="3.70915e-6" />
-    <nuclide name="B-11"  wo="1.68974e-5" />
-    <nuclide name="Fe-54" wo="0.03855611055" />
-    <nuclide name="Fe-56" wo="0.627585036425" />
-    <nuclide name="Fe-57" wo="0.014750478" />
-    <nuclide name="Fe-58" wo="0.002000875025" />
-    <nuclide name="Ni-58" wo="0.059855207342" />
-    <nuclide name="Ni-60" wo="0.023850159704" />
-    <nuclide name="Ni-61" wo="0.001053732407" />
-    <nuclide name="Ni-62" wo="0.003415945715" />
-    <nuclide name="Ni-64" wo="0.000897854832" />
-    <nuclide name="Mn-55" wo="0.0197940" />
-    <nuclide name="Si-28" wo="0.00909197802" />
-    <nuclide name="Si-29" wo="0.00047842098" />
-    <nuclide name="Si-30" wo="0.000326601" />
-    <nuclide name="Cr-50" wo="0.007848910646" />
-    <nuclide name="Cr-52" wo="0.157390026871" />
-    <nuclide name="Cr-53" wo="0.018191270146" />
-    <nuclide name="Cr-54" wo="0.004612692337" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom nozzle region -->
-  <material id="9">
-    <density value="2.53" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0245014" />
-    <nuclide name="O-16"  wo="0.1944274" />
-    <nuclide name="B-10"  wo="7.89917e-5" />
-    <nuclide name="B-11"  wo="3.59854e-4" />
-    <nuclide name="Fe-54" wo="0.030411411144" />
-    <nuclide name="Fe-56" wo="0.495012237964" />
-    <nuclide name="Fe-57" wo="0.01163454624" />
-    <nuclide name="Fe-58" wo="0.001578204652" />
-    <nuclide name="Ni-58" wo="0.047211231662" />
-    <nuclide name="Ni-60" wo="0.018811987544" />
-    <nuclide name="Ni-61" wo="0.000831139127" />
-    <nuclide name="Ni-62" wo="0.002694352115" />
-    <nuclide name="Ni-64" wo="0.000708189552" />
-    <nuclide name="Mn-55" wo="0.0156126" />
-    <nuclide name="Si-28" wo="0.007171335558" />
-    <nuclide name="Si-29" wo="0.000377356542" />
-    <nuclide name="Si-30" wo="0.0002576079" />
-    <nuclide name="Cr-50" wo="0.006190885148" />
-    <nuclide name="Cr-52" wo="0.124142524198" />
-    <nuclide name="Cr-53" wo="0.014348496148" />
-    <nuclide name="Cr-54" wo="0.003638294506" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top nozzle region -->
-  <material id="10">
-    <density value="1.746" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0358870" />
-    <nuclide name="O-16"  wo="0.2847761" />
-    <nuclide name="B-10"  wo="1.15699e-4" />
-    <nuclide name="B-11"  wo="5.27075e-4" />
-    <nuclide name="Fe-54" wo="0.02644016154" />
-    <nuclide name="Fe-56" wo="0.43037146399" />
-    <nuclide name="Fe-57" wo="0.0101152584" />
-    <nuclide name="Fe-58" wo="0.00137211607" />
-    <nuclide name="Ni-58" wo="0.04104621835" />
-    <nuclide name="Ni-60" wo="0.0163554502" />
-    <nuclide name="Ni-61" wo="0.000722605975" />
-    <nuclide name="Ni-62" wo="0.002342513875" />
-    <nuclide name="Ni-64" wo="0.0006157116" />
-    <nuclide name="Mn-55" wo="0.0135739" />
-    <nuclide name="Si-28" wo="0.006234853554" />
-    <nuclide name="Si-29" wo="0.000328078746" />
-    <nuclide name="Si-30" wo="0.0002239677" />
-    <nuclide name="Cr-50" wo="0.005382452306" />
-    <nuclide name="Cr-52" wo="0.107931450781" />
-    <nuclide name="Cr-53" wo="0.012474806806" />
-    <nuclide name="Cr-54" wo="0.003163190107" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top of Fuel Assemblies -->
-  <material id="11">
-    <density value="3.044" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0162913" />
-    <nuclide name="O-16"  wo="0.1292776" />
-    <nuclide name="B-10"  wo="5.25228e-5" />
-    <nuclide name="B-11"  wo="2.39272e-4" />
-    <nuclide name="Zr-90" wo="0.43313403903" />
-    <nuclide name="Zr-91" wo="0.09549277374" />
-    <nuclide name="Zr-92" wo="0.14759527104" />
-    <nuclide name="Zr-94" wo="0.15280552077" />
-    <nuclide name="Zr-96" wo="0.02511169542" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom of Fuel Assemblies -->
-  <material id="12">
-    <density value="1.762" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0292856" />
-    <nuclide name="O-16"  wo="0.2323919" />
-    <nuclide name="B-10"  wo="9.44159e-5" />
-    <nuclide name="B-11"  wo="4.30120e-4" />
-    <nuclide name="Zr-90" wo="0.3741373658" />
-    <nuclide name="Zr-91" wo="0.0824858164" />
-    <nuclide name="Zr-92" wo="0.1274914944" />
-    <nuclide name="Zr-94" wo="0.1319920622" />
-    <nuclide name="Zr-96" wo="0.0216912612" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-</materials>
diff --git a/tests/test_score_flux_yn/results_true.dat b/tests/test_score_flux_yn/results_true.dat
index 937f810ea6..fecff843d9 100644
--- a/tests/test_score_flux_yn/results_true.dat
+++ b/tests/test_score_flux_yn/results_true.dat
@@ -1,1314 +1,1314 @@
 k-combined:
-1.005983E+00 2.248579E-02
+9.903196E-01 4.279617E-02
 tally 1:
-3.224218E+01
-2.217821E+02
-1.079687E+01
-2.494701E+01
-5.252579E+01
-5.951604E+02
-3.325822E+01
-2.414028E+02
-1.145800E+01
-2.880575E+01
-5.605671E+01
-6.804062E+02
+3.890713E+01
+3.046363E+02
+1.366220E+01
+3.758161E+01
+6.561669E+01
+8.680729E+02
+2.382728E+01
+1.170590E+02
+8.047875E+00
+1.334796E+01
+4.056568E+01
+3.389623E+02
 tally 2:
-3.224218E+01
-2.217821E+02
--4.524803E-01
-1.326110E-01
--2.725152E-01
-4.845463E-01
--4.030063E-01
-1.825349E-01
--2.145346E-01
-7.197305E-02
-2.488985E-01
-4.295894E-02
--6.797085E-01
-2.125889E-01
-1.698034E-01
-3.750580E-02
--6.596628E-02
-6.507545E-02
-4.519597E-02
-1.432412E-02
-6.227959E-01
-1.066624E-01
-2.328135E-01
-8.583522E-02
--8.899482E-01
-1.982834E-01
-3.269468E-01
-5.392549E-02
-1.684792E-01
-1.461138E-01
--2.026161E-01
-1.992812E-01
-2.599678E-01
-7.704699E-02
--3.329837E-01
-8.761827E-02
--5.287177E-01
-9.089410E-02
-3.666982E-01
-4.451200E-02
-2.096594E-01
-4.539545E-02
-2.091762E-01
-4.861771E-02
-1.476292E-01
-2.837569E-02
--4.091772E-01
-1.141307E-01
--1.652694E-01
-5.552090E-02
-8.207679E-02
-1.659512E-02
--1.203575E-01
-6.408952E-02
--8.219791E-03
-9.915873E-02
--3.768675E-02
-8.535079E-02
-1.305167E-01
-1.917693E-02
-1.823050E-01
-1.945159E-02
-2.999655E-01
-4.587948E-02
-3.687435E-01
-1.382795E-01
-1.220376E-01
-6.297901E-02
-3.899923E-01
-5.894393E-02
--1.878957E-02
-1.159448E-01
-1.079687E+01
-2.494701E+01
--1.067271E-01
-9.075462E-03
--2.571244E-02
-4.402172E-02
--3.646387E-02
-2.948533E-02
--1.043828E-01
-1.600528E-02
-4.361032E-02
-3.875958E-03
--3.096545E-01
-3.184604E-02
-8.723730E-02
-4.599654E-03
-6.541966E-03
-9.605866E-03
-5.837907E-02
-3.026784E-03
-1.523399E-01
-7.846764E-03
-2.778305E-02
-8.106935E-03
--2.895648E-01
-1.983532E-02
-4.866247E-02
-1.048055E-02
-2.600097E-02
-1.465465E-02
--6.958338E-02
-3.287519E-02
-1.690742E-01
-1.204714E-02
--1.127534E-01
-7.881362E-03
--1.662306E-01
-9.412057E-03
-1.674047E-01
-6.690449E-03
--4.370664E-02
-5.828314E-03
-9.323095E-02
-4.400433E-03
-1.353164E-02
-1.389416E-03
--1.062009E-01
-1.297730E-02
--5.331064E-02
-5.321055E-03
-7.698466E-02
-3.247975E-03
--2.095250E-02
-4.788058E-03
--8.861817E-03
-7.657174E-03
-1.769365E-02
-1.144058E-03
-1.788678E-02
-2.746804E-03
-4.403056E-03
-6.918351E-04
-1.059091E-01
-1.394217E-02
-1.442934E-01
-1.318500E-02
-2.199047E-02
-5.838245E-03
-8.175546E-02
-3.242012E-03
-7.359786E-03
-1.673277E-02
-5.252579E+01
-5.951604E+02
--8.293789E-01
-2.900775E-01
-6.285324E-01
-1.487344E+00
--4.765860E-01
-8.058451E-01
--3.101266E-01
-1.597231E-01
-3.333449E-01
-1.162003E-01
--1.314742E+00
-4.565068E-01
-4.726655E-01
-1.161194E-01
-2.824987E-01
-8.732802E-02
-1.025468E-01
-4.935830E-02
-4.216767E-01
-1.225700E-01
--4.022783E-02
-1.178843E-01
--7.967853E-01
-2.698001E-01
-3.741686E-01
-2.849501E-01
-3.377745E-01
-3.722806E-01
-9.234355E-02
-4.498496E-01
-8.019475E-01
-3.404218E-01
--3.086622E-01
-1.857604E-01
--8.474654E-01
-1.733363E-01
-8.124627E-01
-1.415201E-01
--3.075481E-01
-3.345921E-02
-7.126178E-01
-2.478330E-01
-2.983972E-01
-2.913106E-02
--6.759256E-01
-4.245338E-01
--3.491214E-01
-1.017784E-01
-1.637602E-01
-7.414687E-02
--3.344942E-01
-1.165491E-01
--6.038784E-02
-1.791698E-01
-2.645086E-01
-8.129446E-02
--2.738265E-01
-6.616303E-02
-1.135151E-02
-4.140154E-02
-4.679883E-01
-1.914750E-01
-2.876984E-01
-1.355086E-01
--2.741613E-01
-1.060457E-01
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-2.144153E-01
--9.215131E-02
-4.815135E-01
-3.325822E+01
-2.414028E+02
--3.072951E-02
-3.385901E-01
-9.729550E-01
-3.745599E-01
--5.237870E-01
-3.101477E-01
--5.994810E-01
-1.696123E-01
--3.402784E-01
-1.910685E-01
--3.779571E-01
-2.598004E-01
--4.804007E-01
-1.417261E-01
--5.444032E-01
-1.756801E-01
--9.921809E-02
-6.889191E-02
--3.768065E-01
-8.931168E-02
-5.814513E-02
-1.660714E-02
--1.263664E-01
-2.650287E-01
-1.951860E-01
-2.090892E-01
-3.576168E-01
-2.511782E-01
--9.547988E-02
-7.900044E-03
-5.460746E-01
-1.319868E-01
--1.577655E-01
-8.575762E-02
-2.938792E-02
-7.941653E-02
--7.505627E-01
-2.530444E-01
--2.399786E-01
-1.105633E-01
-2.035740E-01
-2.442135E-02
-1.190368E-01
-8.652216E-02
-5.753449E-01
-9.353813E-02
-4.911025E-01
-6.795258E-02
--2.967023E-03
-7.063512E-03
--2.158307E-01
-4.680921E-02
--1.811238E-01
-7.008450E-02
-1.809785E-01
-3.414843E-02
--1.380825E-01
-3.469381E-02
-3.722241E-01
-3.956589E-02
-2.064516E-01
-2.676312E-02
--3.889056E-01
-6.737109E-02
-1.625815E-01
-1.356347E-02
--5.278455E-01
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--1.269304E-02
-1.253029E-02
-1.145800E+01
-2.880575E+01
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-2.694694E-01
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--1.173739E-01
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--1.785056E-01
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--4.744392E-02
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--1.927536E-01
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--1.800560E-01
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--1.136912E-01
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--1.104415E-01
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--8.343502E-02
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--3.064437E-02
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--1.158397E-01
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--1.136796E-01
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--1.722931E-02
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-1.776223E-01
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-9.719314E-03
-9.088118E-03
-1.681557E-03
--6.298727E-02
-5.287397E-03
-5.793395E-03
-6.397495E-03
--1.835123E-02
-4.506573E-03
--7.558061E-02
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-3.136371E-02
-3.181332E-03
--2.787527E-02
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--9.878307E-02
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--1.043523E-01
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--1.317515E+00
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--9.470910E-01
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--4.107012E-01
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--1.834202E-01
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--4.005049E-01
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diff --git a/tests/test_score_flux_yn/settings.xml b/tests/test_score_flux_yn/settings.xml
deleted file mode 100644
index 517637a59f..0000000000
--- a/tests/test_score_flux_yn/settings.xml
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0"?>
-<settings>
-
-  <eigenvalue>
-    <batches>10</batches>
-    <inactive>5</inactive>
-    <particles>100</particles>
-  </eigenvalue>
-
-  <source>
-    <space type="box">
-      <parameters>
-        -160 -160 -183
-         160  160  183
-      </parameters>
-    </space>
-  </source>
-
-</settings>
diff --git a/tests/test_score_flux_yn/tallies.xml b/tests/test_score_flux_yn/tallies.xml
deleted file mode 100644
index e9f08bd4e6..0000000000
--- a/tests/test_score_flux_yn/tallies.xml
+++ /dev/null
@@ -1,26 +0,0 @@
-<?xml version="1.0"?>
-<tallies>
-
-  <tally id="1">
-    <filter type="cell" bins="21 22 23 27 28 29" />
-    <scores>flux</scores>
-  </tally>
-  
-  <tally id="2">
-    <filter type="cell" bins="21 22 23 27 28 29" />
-    <scores>flux-y5</scores>
-  </tally>
-  
-  <tally id="3">
-    <filter type="cell" bins="21 22 23 27 28 29" />
-    <scores>flux-y5</scores>
-    <estimator>analog</estimator>
-  </tally>
-  
-  <tally id="4">
-    <filter type="cell" bins="21 22 23 27 28 29" />
-    <scores>flux-y5</scores>
-    <estimator>collision</estimator>
-  </tally>
-
-</tallies>
diff --git a/tests/test_score_flux_yn/test_score_flux_yn.py b/tests/test_score_flux_yn/test_score_flux_yn.py
index 1777db993e..254069226c 100755
--- a/tests/test_score_flux_yn/test_score_flux_yn.py
+++ b/tests/test_score_flux_yn/test_score_flux_yn.py
@@ -1,10 +1,33 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
-from testing_harness import TestHarness
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness, PyAPITestHarness
+import openmc
+
+
+class ScoreFluxYnTestHarness(PyAPITestHarness):
+    def _build_inputs(self):
+        filt = openmc.Filter(type='cell', bins=(21, 22, 23, 27, 28, 29))
+        tallies = [openmc.Tally(tally_id=i) for i in range(1, 5)]
+        [t.add_filter(filt) for t in tallies]
+        tallies[0].add_score('flux')
+        [t.add_score('flux-y5') for t in tallies[1:]]
+        tallies[1].estimator = 'tracklength'
+        tallies[2].estimator = 'analog'
+        tallies[3].estimator = 'collision'
+        self._input_set.tallies = openmc.TalliesFile()
+        [self._input_set.tallies.add_tally(t) for t in tallies]
+
+        super(ScoreFluxYnTestHarness, self)._build_inputs()
+
+    def _cleanup(self):
+        super(ScoreFluxYnTestHarness, self)._cleanup()
+        f = os.path.join(os.getcwd(), 'tallies.xml')
+        if os.path.exists(f): os.remove(f)
 
 
 if __name__ == '__main__':
-    harness = TestHarness('statepoint.10.*', True)
+    harness = ScoreFluxYnTestHarness('statepoint.10.*', True)
     harness.main()
diff --git a/tests/test_score_kappafission/geometry.xml b/tests/test_score_kappafission/geometry.xml
deleted file mode 100644
index f6f067aadd..0000000000
--- a/tests/test_score_kappafission/geometry.xml
+++ /dev/null
@@ -1,181 +0,0 @@
-<?xml version="1.0"?>
-<geometry>
-
-  <surface id="1" type="z-cylinder" coeffs="0. 0. 0.41" />
-  <surface id="2" type="z-cylinder" coeffs="0. 0. 0.475" />
-  <surface id="3" type="z-cylinder" coeffs="0. 0. 0.56" />
-  <surface id="4" type="z-cylinder" coeffs="0. 0. 0.62" />
-  <surface id="5" type="z-cylinder" coeffs="0. 0. 187.6" />
-  <surface id="6" type="z-cylinder" coeffs="0. 0. 209.0" />
-  <surface id="7" type="z-cylinder" coeffs="0. 0. 229.0" />
-  <surface id="8" type="z-cylinder" coeffs="0. 0. 249.0" boundary="vacuum" />
-
-  <surface id="31" type="z-plane" coeffs="-229.0" boundary="vacuum" />
-  <surface id="32" type="z-plane" coeffs="-199.0" />
-  <surface id="33" type="z-plane" coeffs="-193.0" />
-  <surface id="34" type="z-plane" coeffs="-183.0" />
-  <surface id="35" type="z-plane" coeffs="0.0" />
-  <surface id="36" type="z-plane" coeffs="183.0" />
-  <surface id="37" type="z-plane" coeffs="203.0" />
-  <surface id="38" type="z-plane" coeffs="215.0" />
-  <surface id="39" type="z-plane" coeffs="223.0" boundary="vacuum" />
-
-  <!-- All geometry on base universe -->
-  <cell id="1"  fill="200"    region="  -6 34 -35" /> <!-- Lower core -->
-  <cell id="2"  fill="201"    region="  -6 35 -36" /> <!-- Upper core -->
-  <cell id="3"  material="8"  region="  -7 31 -32" /> <!-- Lower core plate region -->
-  <cell id="4"  material="9"  region="  -5 32 -33" /> <!-- Bottom nozzle region -->
-  <cell id="5"  material="12" region="  -5 33 -34" /> <!-- Bottom FA region -->
-  <cell id="6"  material="11" region="  -5 36 -37" /> <!-- Top FA region -->
-  <cell id="7"  material="10" region="  -5 37 -38" /> <!-- Top nozzle region -->
-  <cell id="8"  material="7"  region="  -7 38 -39" /> <!-- Upper plate region -->
-  <cell id="9"  material="4"  region="6 -7 32 -38" /> <!-- Downcomer -->
-  <cell id="10" material="5"  region="7 -8 31 -39" /> <!-- RPV -->
-  <cell id="11" material="6"  region="5 -6 32 -34" /> <!-- Bottom of radial reflector -->
-  <cell id="12" material="7"  region="5 -6 36 -38" /> <!-- Top of radial reflector -->
-
-  <!-- Fuel pin, cladding, cold water -->
-  <cell id="21" universe="1" material="1" region="-1"   />
-  <cell id="22" universe="1" material="2" region="1 -2" />
-  <cell id="23" universe="1" material="3" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="24" universe="2" material="3" region="-3"   />
-  <cell id="25" universe="2" material="2" region="3 -4" />
-  <cell id="26" universe="2" material="3" region="4"    />
-
-  <!-- Fuel pin, cladding, hot water -->
-  <cell id="27" universe="3" material="1" region="-1"   />
-  <cell id="28" universe="3" material="2" region="1 -2" />
-  <cell id="29" universe="3" material="4" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="30" universe="4" material="4" region="-3"   />
-  <cell id="31" universe="4" material="2" region="3 -4" />
-  <cell id="32" universe="4" material="4" region="4"    />
-
-  <!-- cell for water assembly (cold) -->
-  <cell id="50" universe="5" material="4" region="34 -35" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="60" universe="6" fill="100"   region="34 -35" />
-
-  <!-- cell for water assembly (hot) -->
-  <cell id="70" universe="7" material="3" region="35 -36" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="80" universe="8" fill="101"   region="35 -36" />
-
-  <!-- Fuel Assembly (Lower Half) -->
-  <lattice id="100">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-    </universes>
-  </lattice>
-
-  <!-- Fuel Assembly (Upper Half) -->
-  <lattice id="101">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Lower Half) -->
-  <lattice id="200">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Upper Half) -->
-  <lattice id="201">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-    </universes>
-  </lattice>
-
-</geometry>
diff --git a/tests/test_score_kappafission/inputs_true.dat b/tests/test_score_kappafission/inputs_true.dat
new file mode 100644
index 0000000000..86939274b8
--- /dev/null
+++ b/tests/test_score_kappafission/inputs_true.dat
@@ -0,0 +1 @@
+8dd415b571ad51a62f2394d149f6c417d63babd4e85a1ff6f1cac267c4f4bcd0642ba0b24da39ff926bee4aea7dbbe0371face03d2009d8d74e7ac31c7c45000
\ No newline at end of file
diff --git a/tests/test_score_kappafission/materials.xml b/tests/test_score_kappafission/materials.xml
deleted file mode 100644
index 9c0b74f3f1..0000000000
--- a/tests/test_score_kappafission/materials.xml
+++ /dev/null
@@ -1,272 +0,0 @@
-<?xml version="1.0"?>
-<materials>
-
-  <default_xs>71c</default_xs>
-
-  <!-- Fuel composition -->
-  <material id="1">
-    <density value="10.062" units="g/cm3" />
-    <nuclide name="U-234"   ao="4.9476e-6" />
-    <nuclide name="U-235"   ao="4.8218e-4" />
-    <nuclide name="U-236"   ao="9.0402e-5" />
-    <nuclide name="U-238"   ao="2.1504e-2" />
-    <nuclide name="Np-237"  ao="7.3733e-6" />
-    <nuclide name="Pu-238"  ao="1.5148e-6" />
-    <nuclide name="Pu-239"  ao="1.3955e-4" />
-    <nuclide name="Pu-240"  ao="3.4405e-5" />
-    <nuclide name="Pu-241"  ao="2.1439e-5" />
-    <nuclide name="Pu-242"  ao="3.7422e-6" />
-    <nuclide name="Am-241"  ao="4.5041e-7" />
-    <nuclide name="Am-242m" ao="9.2301e-9" />
-    <nuclide name="Am-243"  ao="4.7878e-7" />
-    <nuclide name="Cm-242"  ao="1.0485e-7" />
-    <nuclide name="Cm-243"  ao="1.4268e-9" />
-    <nuclide name="Cm-244"  ao="8.8756e-8" />
-    <nuclide name="Cm-245"  ao="3.5285e-9" />
-    <nuclide name="Mo-95"   ao="2.6497e-5" />
-    <nuclide name="Tc-99"   ao="3.2772e-5" />
-    <nuclide name="Ru-101"  ao="3.0742e-5" />
-    <nuclide name="Ru-103"  ao="2.3505e-6" />
-    <nuclide name="Ag-109"  ao="2.0009e-6" />
-    <nuclide name="Xe-135"  ao="1.0801e-8" />
-    <nuclide name="Cs-133"  ao="3.4612e-5" />
-    <nuclide name="Nd-143"  ao="2.6078e-5" />
-    <nuclide name="Nd-145"  ao="1.9898e-5" />
-    <nuclide name="Sm-147"  ao="1.6128e-6" />
-    <nuclide name="Sm-149"  ao="1.1627e-7" />
-    <nuclide name="Sm-150"  ao="7.1727e-6" />
-    <nuclide name="Sm-151"  ao="5.4947e-7" />
-    <nuclide name="Sm-152"  ao="3.0221e-6" />
-    <nuclide name="Eu-153"  ao="2.6209e-6" />
-    <nuclide name="Gd-155"  ao="1.5369e-9" />
-    <nuclide name="O-16"    ao="4.5737e-2" />
-  </material>
-
-  <!-- Cladding composition -->
-  <material id="2">
-    <density value="5.77" units="g/cm3" />
-    <nuclide name="Zr-90" ao="0.5145" />
-    <nuclide name="Zr-91" ao="0.1122" />
-    <nuclide name="Zr-92" ao="0.1715" />
-    <nuclide name="Zr-94" ao="0.1738" />
-    <nuclide name="Zr-96" ao="0.0280" />
-  </material>
-
-  <!-- Cold borated water -->
-  <material id="3">
-    <density value="0.07416" units="atom/b-cm" />
-    <nuclide name="H-1" ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Hot borated water -->
-  <material id="4">
-    <density value="0.06614" units="atom/b-cm" />
-    <nuclide name="H-1"  ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- RPV Composition -->
-  <material id="5">
-    <density value="7.9" units="g/cm3" />
-    <nuclide name="Fe-54"  wo="0.05437098" />
-    <nuclide name="Fe-56"  wo="0.88500663" />
-    <nuclide name="Fe-57"  wo="0.0208008" />
-    <nuclide name="Fe-58"  wo="0.00282159" />
-    <nuclide name="Ni-58"  wo="0.0067198" />
-    <nuclide name="Ni-60"  wo="0.0026776" />
-    <nuclide name="Ni-61"  wo="0.0001183" />
-    <nuclide name="Ni-62"  wo="0.0003835" />
-    <nuclide name="Ni-64"  wo="0.0001008" />
-    <nuclide name="Mn-55"  wo="0.01" />
-    <nuclide name="Mo-92"  wo="0.000849" />
-    <nuclide name="Mo-94"  wo="0.0005418" />
-    <nuclide name="Mo-95"  wo="0.0009438" />
-    <nuclide name="Mo-96"  wo="0.0010002" />
-    <nuclide name="Mo-97"  wo="0.0005796" />
-    <nuclide name="Mo-98"  wo="0.0014814" />
-    <nuclide name="Mo-100" wo="0.0006042" />
-    <nuclide name="Si-28"  wo="0.00367464" />
-    <nuclide name="Si-29"  wo="0.00019336" />
-    <nuclide name="Si-30"  wo="0.000132" />
-    <nuclide name="Cr-50"  wo="0.00010435" />
-    <nuclide name="Cr-52"  wo="0.002092475" />
-    <nuclide name="Cr-53"  wo="0.00024185" />
-    <nuclide name="Cr-54"  wo="6.1325e-05" />
-    <nuclide name="C-Nat"  wo="0.0025" />
-    <nuclide name="Cu-63"  wo="0.0013696" />
-    <nuclide name="Cu-65"  wo="0.0006304" />
-  </material>
-
-  <!-- Lower radial reflector -->
-  <material id="6">
-    <density value="4.32" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0095661" />
-    <nuclide name="O-16"  wo="0.0759107" />
-    <nuclide name="B-10"  wo="3.08409e-5" />
-    <nuclide name="B-11"  wo="1.40499e-4" />
-    <nuclide name="Fe-54" wo="0.035620772088" />
-    <nuclide name="Fe-56" wo="0.579805982228" />
-    <nuclide name="Fe-57" wo="0.01362750048" />
-    <nuclide name="Fe-58" wo="0.001848545204" />
-    <nuclide name="Ni-58" wo="0.055298376566" />
-    <nuclide name="Ni-60" wo="0.022034425592" />
-    <nuclide name="Ni-61" wo="0.000973510811" />
-    <nuclide name="Ni-62" wo="0.003155886695" />
-    <nuclide name="Ni-64" wo="0.000829500336" />
-    <nuclide name="Mn-55" wo="0.0182870" />
-    <nuclide name="Si-28" wo="0.00839976771" />
-    <nuclide name="Si-29" wo="0.00044199679" />
-    <nuclide name="Si-30" wo="0.0003017355" />
-    <nuclide name="Cr-50" wo="0.007251360806" />
-    <nuclide name="Cr-52" wo="0.145407678031" />
-    <nuclide name="Cr-53" wo="0.016806340306" />
-    <nuclide name="Cr-54" wo="0.004261520857" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Upper radial reflector / Top plate region -->
-  <material id="7">
-    <density value="4.28" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0086117" />
-    <nuclide name="O-16"  wo="0.0683369" />
-    <nuclide name="B-10"  wo="2.77638e-5" />
-    <nuclide name="B-11"  wo="1.26481e-4" />
-    <nuclide name="Fe-54" wo="0.035953677186" />
-    <nuclide name="Fe-56" wo="0.585224740891" />
-    <nuclide name="Fe-57" wo="0.01375486056" />
-    <nuclide name="Fe-58" wo="0.001865821363" />
-    <nuclide name="Ni-58" wo="0.055815129186" />
-    <nuclide name="Ni-60" wo="0.022240333032" />
-    <nuclide name="Ni-61" wo="0.000982608081" />
-    <nuclide name="Ni-62" wo="0.003185377845" />
-    <nuclide name="Ni-64" wo="0.000837251856" />
-    <nuclide name="Mn-55" wo="0.0184579" />
-    <nuclide name="Si-28" wo="0.00847831314" />
-    <nuclide name="Si-29" wo="0.00044612986" />
-    <nuclide name="Si-30" wo="0.000304557" />
-    <nuclide name="Cr-50" wo="0.00731912987" />
-    <nuclide name="Cr-52" wo="0.146766614995" />
-    <nuclide name="Cr-53" wo="0.01696340737" />
-    <nuclide name="Cr-54" wo="0.004301347765" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom plate region -->
-  <material id="8">
-    <density value="7.184" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0011505" />
-    <nuclide name="O-16"  wo="0.0091296" />
-    <nuclide name="B-10"  wo="3.70915e-6" />
-    <nuclide name="B-11"  wo="1.68974e-5" />
-    <nuclide name="Fe-54" wo="0.03855611055" />
-    <nuclide name="Fe-56" wo="0.627585036425" />
-    <nuclide name="Fe-57" wo="0.014750478" />
-    <nuclide name="Fe-58" wo="0.002000875025" />
-    <nuclide name="Ni-58" wo="0.059855207342" />
-    <nuclide name="Ni-60" wo="0.023850159704" />
-    <nuclide name="Ni-61" wo="0.001053732407" />
-    <nuclide name="Ni-62" wo="0.003415945715" />
-    <nuclide name="Ni-64" wo="0.000897854832" />
-    <nuclide name="Mn-55" wo="0.0197940" />
-    <nuclide name="Si-28" wo="0.00909197802" />
-    <nuclide name="Si-29" wo="0.00047842098" />
-    <nuclide name="Si-30" wo="0.000326601" />
-    <nuclide name="Cr-50" wo="0.007848910646" />
-    <nuclide name="Cr-52" wo="0.157390026871" />
-    <nuclide name="Cr-53" wo="0.018191270146" />
-    <nuclide name="Cr-54" wo="0.004612692337" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom nozzle region -->
-  <material id="9">
-    <density value="2.53" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0245014" />
-    <nuclide name="O-16"  wo="0.1944274" />
-    <nuclide name="B-10"  wo="7.89917e-5" />
-    <nuclide name="B-11"  wo="3.59854e-4" />
-    <nuclide name="Fe-54" wo="0.030411411144" />
-    <nuclide name="Fe-56" wo="0.495012237964" />
-    <nuclide name="Fe-57" wo="0.01163454624" />
-    <nuclide name="Fe-58" wo="0.001578204652" />
-    <nuclide name="Ni-58" wo="0.047211231662" />
-    <nuclide name="Ni-60" wo="0.018811987544" />
-    <nuclide name="Ni-61" wo="0.000831139127" />
-    <nuclide name="Ni-62" wo="0.002694352115" />
-    <nuclide name="Ni-64" wo="0.000708189552" />
-    <nuclide name="Mn-55" wo="0.0156126" />
-    <nuclide name="Si-28" wo="0.007171335558" />
-    <nuclide name="Si-29" wo="0.000377356542" />
-    <nuclide name="Si-30" wo="0.0002576079" />
-    <nuclide name="Cr-50" wo="0.006190885148" />
-    <nuclide name="Cr-52" wo="0.124142524198" />
-    <nuclide name="Cr-53" wo="0.014348496148" />
-    <nuclide name="Cr-54" wo="0.003638294506" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top nozzle region -->
-  <material id="10">
-    <density value="1.746" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0358870" />
-    <nuclide name="O-16"  wo="0.2847761" />
-    <nuclide name="B-10"  wo="1.15699e-4" />
-    <nuclide name="B-11"  wo="5.27075e-4" />
-    <nuclide name="Fe-54" wo="0.02644016154" />
-    <nuclide name="Fe-56" wo="0.43037146399" />
-    <nuclide name="Fe-57" wo="0.0101152584" />
-    <nuclide name="Fe-58" wo="0.00137211607" />
-    <nuclide name="Ni-58" wo="0.04104621835" />
-    <nuclide name="Ni-60" wo="0.0163554502" />
-    <nuclide name="Ni-61" wo="0.000722605975" />
-    <nuclide name="Ni-62" wo="0.002342513875" />
-    <nuclide name="Ni-64" wo="0.0006157116" />
-    <nuclide name="Mn-55" wo="0.0135739" />
-    <nuclide name="Si-28" wo="0.006234853554" />
-    <nuclide name="Si-29" wo="0.000328078746" />
-    <nuclide name="Si-30" wo="0.0002239677" />
-    <nuclide name="Cr-50" wo="0.005382452306" />
-    <nuclide name="Cr-52" wo="0.107931450781" />
-    <nuclide name="Cr-53" wo="0.012474806806" />
-    <nuclide name="Cr-54" wo="0.003163190107" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top of Fuel Assemblies -->
-  <material id="11">
-    <density value="3.044" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0162913" />
-    <nuclide name="O-16"  wo="0.1292776" />
-    <nuclide name="B-10"  wo="5.25228e-5" />
-    <nuclide name="B-11"  wo="2.39272e-4" />
-    <nuclide name="Zr-90" wo="0.43313403903" />
-    <nuclide name="Zr-91" wo="0.09549277374" />
-    <nuclide name="Zr-92" wo="0.14759527104" />
-    <nuclide name="Zr-94" wo="0.15280552077" />
-    <nuclide name="Zr-96" wo="0.02511169542" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom of Fuel Assemblies -->
-  <material id="12">
-    <density value="1.762" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0292856" />
-    <nuclide name="O-16"  wo="0.2323919" />
-    <nuclide name="B-10"  wo="9.44159e-5" />
-    <nuclide name="B-11"  wo="4.30120e-4" />
-    <nuclide name="Zr-90" wo="0.3741373658" />
-    <nuclide name="Zr-91" wo="0.0824858164" />
-    <nuclide name="Zr-92" wo="0.1274914944" />
-    <nuclide name="Zr-94" wo="0.1319920622" />
-    <nuclide name="Zr-96" wo="0.0216912612" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-</materials>
diff --git a/tests/test_score_kappafission/results_true.dat b/tests/test_score_kappafission/results_true.dat
index e992b4b682..75d37cd87e 100644
--- a/tests/test_score_kappafission/results_true.dat
+++ b/tests/test_score_kappafission/results_true.dat
@@ -1,29 +1,29 @@
 k-combined:
-1.005983E+00 2.248579E-02
+9.903196E-01 4.279617E-02
 tally 1:
-1.848110E+02
-7.563211E+03
+2.266048E+02
+1.049833E+04
 0.000000E+00
 0.000000E+00
 0.000000E+00
 0.000000E+00
-2.035912E+02
-8.999693E+03
+1.366139E+02
+3.859561E+03
 tally 2:
-1.765331E+02
-6.974050E+03
+2.402814E+02
+1.174003E+04
 0.000000E+00
 0.000000E+00
 0.000000E+00
 0.000000E+00
-1.938441E+02
-7.888708E+03
+1.270420E+02
+3.297537E+03
 tally 3:
-1.770125E+02
-6.702714E+03
+2.217075E+02
+1.003168E+04
 0.000000E+00
 0.000000E+00
 0.000000E+00
 0.000000E+00
-1.942246E+02
-8.416720E+03
+1.375693E+02
+3.872389E+03
diff --git a/tests/test_score_kappafission/settings.xml b/tests/test_score_kappafission/settings.xml
deleted file mode 100644
index 517637a59f..0000000000
--- a/tests/test_score_kappafission/settings.xml
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0"?>
-<settings>
-
-  <eigenvalue>
-    <batches>10</batches>
-    <inactive>5</inactive>
-    <particles>100</particles>
-  </eigenvalue>
-
-  <source>
-    <space type="box">
-      <parameters>
-        -160 -160 -183
-         160  160  183
-      </parameters>
-    </space>
-  </source>
-
-</settings>
diff --git a/tests/test_score_kappafission/tallies.xml b/tests/test_score_kappafission/tallies.xml
deleted file mode 100644
index 8fe5d5c842..0000000000
--- a/tests/test_score_kappafission/tallies.xml
+++ /dev/null
@@ -1,21 +0,0 @@
-<?xml version="1.0"?>
-<tallies>
-
-  <tally id="1">
-    <filter type="cell" bins="21 22 23 27" />
-    <scores>kappa-fission</scores>
-  </tally>
-
-  <tally id="2">
-    <filter type="cell" bins="21 22 23 27" />
-    <scores>kappa-fission</scores>
-    <estimator>analog</estimator>
-  </tally>
-
-  <tally id="3">
-    <filter type="cell" bins="21 22 23 27" />
-    <scores>kappa-fission</scores>
-    <estimator>collision</estimator>
-  </tally>
-
-</tallies>
diff --git a/tests/test_score_kappafission/test_score_kappafission.py b/tests/test_score_kappafission/test_score_kappafission.py
index 1777db993e..2e93b51c46 100644
--- a/tests/test_score_kappafission/test_score_kappafission.py
+++ b/tests/test_score_kappafission/test_score_kappafission.py
@@ -1,10 +1,32 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
-from testing_harness import TestHarness
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness, PyAPITestHarness
+import openmc
+
+
+class ScoreKappaFissionTestHarness(PyAPITestHarness):
+    def _build_inputs(self):
+        filt = openmc.Filter(type='cell', bins=(21, 22, 23, 27))
+        tallies = [openmc.Tally(tally_id=i) for i in range(1, 4)]
+        [t.add_filter(filt) for t in tallies]
+        [t.add_score('kappa-fission') for t in tallies]
+        tallies[0].estimator = 'tracklength'
+        tallies[1].estimator = 'analog'
+        tallies[2].estimator = 'collision'
+        self._input_set.tallies = openmc.TalliesFile()
+        [self._input_set.tallies.add_tally(t) for t in tallies]
+
+        super(ScoreKappaFissionTestHarness, self)._build_inputs()
+
+    def _cleanup(self):
+        super(ScoreKappaFissionTestHarness, self)._cleanup()
+        f = os.path.join(os.getcwd(), 'tallies.xml')
+        if os.path.exists(f): os.remove(f)
 
 
 if __name__ == '__main__':
-    harness = TestHarness('statepoint.10.*', True)
+    harness = ScoreKappaFissionTestHarness('statepoint.10.*', True)
     harness.main()
diff --git a/tests/test_score_nufission/geometry.xml b/tests/test_score_nufission/geometry.xml
deleted file mode 100644
index f6f067aadd..0000000000
--- a/tests/test_score_nufission/geometry.xml
+++ /dev/null
@@ -1,181 +0,0 @@
-<?xml version="1.0"?>
-<geometry>
-
-  <surface id="1" type="z-cylinder" coeffs="0. 0. 0.41" />
-  <surface id="2" type="z-cylinder" coeffs="0. 0. 0.475" />
-  <surface id="3" type="z-cylinder" coeffs="0. 0. 0.56" />
-  <surface id="4" type="z-cylinder" coeffs="0. 0. 0.62" />
-  <surface id="5" type="z-cylinder" coeffs="0. 0. 187.6" />
-  <surface id="6" type="z-cylinder" coeffs="0. 0. 209.0" />
-  <surface id="7" type="z-cylinder" coeffs="0. 0. 229.0" />
-  <surface id="8" type="z-cylinder" coeffs="0. 0. 249.0" boundary="vacuum" />
-
-  <surface id="31" type="z-plane" coeffs="-229.0" boundary="vacuum" />
-  <surface id="32" type="z-plane" coeffs="-199.0" />
-  <surface id="33" type="z-plane" coeffs="-193.0" />
-  <surface id="34" type="z-plane" coeffs="-183.0" />
-  <surface id="35" type="z-plane" coeffs="0.0" />
-  <surface id="36" type="z-plane" coeffs="183.0" />
-  <surface id="37" type="z-plane" coeffs="203.0" />
-  <surface id="38" type="z-plane" coeffs="215.0" />
-  <surface id="39" type="z-plane" coeffs="223.0" boundary="vacuum" />
-
-  <!-- All geometry on base universe -->
-  <cell id="1"  fill="200"    region="  -6 34 -35" /> <!-- Lower core -->
-  <cell id="2"  fill="201"    region="  -6 35 -36" /> <!-- Upper core -->
-  <cell id="3"  material="8"  region="  -7 31 -32" /> <!-- Lower core plate region -->
-  <cell id="4"  material="9"  region="  -5 32 -33" /> <!-- Bottom nozzle region -->
-  <cell id="5"  material="12" region="  -5 33 -34" /> <!-- Bottom FA region -->
-  <cell id="6"  material="11" region="  -5 36 -37" /> <!-- Top FA region -->
-  <cell id="7"  material="10" region="  -5 37 -38" /> <!-- Top nozzle region -->
-  <cell id="8"  material="7"  region="  -7 38 -39" /> <!-- Upper plate region -->
-  <cell id="9"  material="4"  region="6 -7 32 -38" /> <!-- Downcomer -->
-  <cell id="10" material="5"  region="7 -8 31 -39" /> <!-- RPV -->
-  <cell id="11" material="6"  region="5 -6 32 -34" /> <!-- Bottom of radial reflector -->
-  <cell id="12" material="7"  region="5 -6 36 -38" /> <!-- Top of radial reflector -->
-
-  <!-- Fuel pin, cladding, cold water -->
-  <cell id="21" universe="1" material="1" region="-1"   />
-  <cell id="22" universe="1" material="2" region="1 -2" />
-  <cell id="23" universe="1" material="3" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="24" universe="2" material="3" region="-3"   />
-  <cell id="25" universe="2" material="2" region="3 -4" />
-  <cell id="26" universe="2" material="3" region="4"    />
-
-  <!-- Fuel pin, cladding, hot water -->
-  <cell id="27" universe="3" material="1" region="-1"   />
-  <cell id="28" universe="3" material="2" region="1 -2" />
-  <cell id="29" universe="3" material="4" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="30" universe="4" material="4" region="-3"   />
-  <cell id="31" universe="4" material="2" region="3 -4" />
-  <cell id="32" universe="4" material="4" region="4"    />
-
-  <!-- cell for water assembly (cold) -->
-  <cell id="50" universe="5" material="4" region="34 -35" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="60" universe="6" fill="100"   region="34 -35" />
-
-  <!-- cell for water assembly (hot) -->
-  <cell id="70" universe="7" material="3" region="35 -36" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="80" universe="8" fill="101"   region="35 -36" />
-
-  <!-- Fuel Assembly (Lower Half) -->
-  <lattice id="100">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-    </universes>
-  </lattice>
-
-  <!-- Fuel Assembly (Upper Half) -->
-  <lattice id="101">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Lower Half) -->
-  <lattice id="200">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Upper Half) -->
-  <lattice id="201">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-    </universes>
-  </lattice>
-
-</geometry>
diff --git a/tests/test_score_nufission/inputs_true.dat b/tests/test_score_nufission/inputs_true.dat
new file mode 100644
index 0000000000..4e6018f99c
--- /dev/null
+++ b/tests/test_score_nufission/inputs_true.dat
@@ -0,0 +1 @@
+0e60125f41bbc362703886097b2bc7297ff0aae6365d4653771b86b1aab2de43a924d81b3d73afb781733b2919f30089373f74da4a96f94f988eb04ddf482e85
\ No newline at end of file
diff --git a/tests/test_score_nufission/materials.xml b/tests/test_score_nufission/materials.xml
deleted file mode 100644
index 9c0b74f3f1..0000000000
--- a/tests/test_score_nufission/materials.xml
+++ /dev/null
@@ -1,272 +0,0 @@
-<?xml version="1.0"?>
-<materials>
-
-  <default_xs>71c</default_xs>
-
-  <!-- Fuel composition -->
-  <material id="1">
-    <density value="10.062" units="g/cm3" />
-    <nuclide name="U-234"   ao="4.9476e-6" />
-    <nuclide name="U-235"   ao="4.8218e-4" />
-    <nuclide name="U-236"   ao="9.0402e-5" />
-    <nuclide name="U-238"   ao="2.1504e-2" />
-    <nuclide name="Np-237"  ao="7.3733e-6" />
-    <nuclide name="Pu-238"  ao="1.5148e-6" />
-    <nuclide name="Pu-239"  ao="1.3955e-4" />
-    <nuclide name="Pu-240"  ao="3.4405e-5" />
-    <nuclide name="Pu-241"  ao="2.1439e-5" />
-    <nuclide name="Pu-242"  ao="3.7422e-6" />
-    <nuclide name="Am-241"  ao="4.5041e-7" />
-    <nuclide name="Am-242m" ao="9.2301e-9" />
-    <nuclide name="Am-243"  ao="4.7878e-7" />
-    <nuclide name="Cm-242"  ao="1.0485e-7" />
-    <nuclide name="Cm-243"  ao="1.4268e-9" />
-    <nuclide name="Cm-244"  ao="8.8756e-8" />
-    <nuclide name="Cm-245"  ao="3.5285e-9" />
-    <nuclide name="Mo-95"   ao="2.6497e-5" />
-    <nuclide name="Tc-99"   ao="3.2772e-5" />
-    <nuclide name="Ru-101"  ao="3.0742e-5" />
-    <nuclide name="Ru-103"  ao="2.3505e-6" />
-    <nuclide name="Ag-109"  ao="2.0009e-6" />
-    <nuclide name="Xe-135"  ao="1.0801e-8" />
-    <nuclide name="Cs-133"  ao="3.4612e-5" />
-    <nuclide name="Nd-143"  ao="2.6078e-5" />
-    <nuclide name="Nd-145"  ao="1.9898e-5" />
-    <nuclide name="Sm-147"  ao="1.6128e-6" />
-    <nuclide name="Sm-149"  ao="1.1627e-7" />
-    <nuclide name="Sm-150"  ao="7.1727e-6" />
-    <nuclide name="Sm-151"  ao="5.4947e-7" />
-    <nuclide name="Sm-152"  ao="3.0221e-6" />
-    <nuclide name="Eu-153"  ao="2.6209e-6" />
-    <nuclide name="Gd-155"  ao="1.5369e-9" />
-    <nuclide name="O-16"    ao="4.5737e-2" />
-  </material>
-
-  <!-- Cladding composition -->
-  <material id="2">
-    <density value="5.77" units="g/cm3" />
-    <nuclide name="Zr-90" ao="0.5145" />
-    <nuclide name="Zr-91" ao="0.1122" />
-    <nuclide name="Zr-92" ao="0.1715" />
-    <nuclide name="Zr-94" ao="0.1738" />
-    <nuclide name="Zr-96" ao="0.0280" />
-  </material>
-
-  <!-- Cold borated water -->
-  <material id="3">
-    <density value="0.07416" units="atom/b-cm" />
-    <nuclide name="H-1" ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Hot borated water -->
-  <material id="4">
-    <density value="0.06614" units="atom/b-cm" />
-    <nuclide name="H-1"  ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- RPV Composition -->
-  <material id="5">
-    <density value="7.9" units="g/cm3" />
-    <nuclide name="Fe-54"  wo="0.05437098" />
-    <nuclide name="Fe-56"  wo="0.88500663" />
-    <nuclide name="Fe-57"  wo="0.0208008" />
-    <nuclide name="Fe-58"  wo="0.00282159" />
-    <nuclide name="Ni-58"  wo="0.0067198" />
-    <nuclide name="Ni-60"  wo="0.0026776" />
-    <nuclide name="Ni-61"  wo="0.0001183" />
-    <nuclide name="Ni-62"  wo="0.0003835" />
-    <nuclide name="Ni-64"  wo="0.0001008" />
-    <nuclide name="Mn-55"  wo="0.01" />
-    <nuclide name="Mo-92"  wo="0.000849" />
-    <nuclide name="Mo-94"  wo="0.0005418" />
-    <nuclide name="Mo-95"  wo="0.0009438" />
-    <nuclide name="Mo-96"  wo="0.0010002" />
-    <nuclide name="Mo-97"  wo="0.0005796" />
-    <nuclide name="Mo-98"  wo="0.0014814" />
-    <nuclide name="Mo-100" wo="0.0006042" />
-    <nuclide name="Si-28"  wo="0.00367464" />
-    <nuclide name="Si-29"  wo="0.00019336" />
-    <nuclide name="Si-30"  wo="0.000132" />
-    <nuclide name="Cr-50"  wo="0.00010435" />
-    <nuclide name="Cr-52"  wo="0.002092475" />
-    <nuclide name="Cr-53"  wo="0.00024185" />
-    <nuclide name="Cr-54"  wo="6.1325e-05" />
-    <nuclide name="C-Nat"  wo="0.0025" />
-    <nuclide name="Cu-63"  wo="0.0013696" />
-    <nuclide name="Cu-65"  wo="0.0006304" />
-  </material>
-
-  <!-- Lower radial reflector -->
-  <material id="6">
-    <density value="4.32" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0095661" />
-    <nuclide name="O-16"  wo="0.0759107" />
-    <nuclide name="B-10"  wo="3.08409e-5" />
-    <nuclide name="B-11"  wo="1.40499e-4" />
-    <nuclide name="Fe-54" wo="0.035620772088" />
-    <nuclide name="Fe-56" wo="0.579805982228" />
-    <nuclide name="Fe-57" wo="0.01362750048" />
-    <nuclide name="Fe-58" wo="0.001848545204" />
-    <nuclide name="Ni-58" wo="0.055298376566" />
-    <nuclide name="Ni-60" wo="0.022034425592" />
-    <nuclide name="Ni-61" wo="0.000973510811" />
-    <nuclide name="Ni-62" wo="0.003155886695" />
-    <nuclide name="Ni-64" wo="0.000829500336" />
-    <nuclide name="Mn-55" wo="0.0182870" />
-    <nuclide name="Si-28" wo="0.00839976771" />
-    <nuclide name="Si-29" wo="0.00044199679" />
-    <nuclide name="Si-30" wo="0.0003017355" />
-    <nuclide name="Cr-50" wo="0.007251360806" />
-    <nuclide name="Cr-52" wo="0.145407678031" />
-    <nuclide name="Cr-53" wo="0.016806340306" />
-    <nuclide name="Cr-54" wo="0.004261520857" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Upper radial reflector / Top plate region -->
-  <material id="7">
-    <density value="4.28" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0086117" />
-    <nuclide name="O-16"  wo="0.0683369" />
-    <nuclide name="B-10"  wo="2.77638e-5" />
-    <nuclide name="B-11"  wo="1.26481e-4" />
-    <nuclide name="Fe-54" wo="0.035953677186" />
-    <nuclide name="Fe-56" wo="0.585224740891" />
-    <nuclide name="Fe-57" wo="0.01375486056" />
-    <nuclide name="Fe-58" wo="0.001865821363" />
-    <nuclide name="Ni-58" wo="0.055815129186" />
-    <nuclide name="Ni-60" wo="0.022240333032" />
-    <nuclide name="Ni-61" wo="0.000982608081" />
-    <nuclide name="Ni-62" wo="0.003185377845" />
-    <nuclide name="Ni-64" wo="0.000837251856" />
-    <nuclide name="Mn-55" wo="0.0184579" />
-    <nuclide name="Si-28" wo="0.00847831314" />
-    <nuclide name="Si-29" wo="0.00044612986" />
-    <nuclide name="Si-30" wo="0.000304557" />
-    <nuclide name="Cr-50" wo="0.00731912987" />
-    <nuclide name="Cr-52" wo="0.146766614995" />
-    <nuclide name="Cr-53" wo="0.01696340737" />
-    <nuclide name="Cr-54" wo="0.004301347765" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom plate region -->
-  <material id="8">
-    <density value="7.184" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0011505" />
-    <nuclide name="O-16"  wo="0.0091296" />
-    <nuclide name="B-10"  wo="3.70915e-6" />
-    <nuclide name="B-11"  wo="1.68974e-5" />
-    <nuclide name="Fe-54" wo="0.03855611055" />
-    <nuclide name="Fe-56" wo="0.627585036425" />
-    <nuclide name="Fe-57" wo="0.014750478" />
-    <nuclide name="Fe-58" wo="0.002000875025" />
-    <nuclide name="Ni-58" wo="0.059855207342" />
-    <nuclide name="Ni-60" wo="0.023850159704" />
-    <nuclide name="Ni-61" wo="0.001053732407" />
-    <nuclide name="Ni-62" wo="0.003415945715" />
-    <nuclide name="Ni-64" wo="0.000897854832" />
-    <nuclide name="Mn-55" wo="0.0197940" />
-    <nuclide name="Si-28" wo="0.00909197802" />
-    <nuclide name="Si-29" wo="0.00047842098" />
-    <nuclide name="Si-30" wo="0.000326601" />
-    <nuclide name="Cr-50" wo="0.007848910646" />
-    <nuclide name="Cr-52" wo="0.157390026871" />
-    <nuclide name="Cr-53" wo="0.018191270146" />
-    <nuclide name="Cr-54" wo="0.004612692337" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom nozzle region -->
-  <material id="9">
-    <density value="2.53" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0245014" />
-    <nuclide name="O-16"  wo="0.1944274" />
-    <nuclide name="B-10"  wo="7.89917e-5" />
-    <nuclide name="B-11"  wo="3.59854e-4" />
-    <nuclide name="Fe-54" wo="0.030411411144" />
-    <nuclide name="Fe-56" wo="0.495012237964" />
-    <nuclide name="Fe-57" wo="0.01163454624" />
-    <nuclide name="Fe-58" wo="0.001578204652" />
-    <nuclide name="Ni-58" wo="0.047211231662" />
-    <nuclide name="Ni-60" wo="0.018811987544" />
-    <nuclide name="Ni-61" wo="0.000831139127" />
-    <nuclide name="Ni-62" wo="0.002694352115" />
-    <nuclide name="Ni-64" wo="0.000708189552" />
-    <nuclide name="Mn-55" wo="0.0156126" />
-    <nuclide name="Si-28" wo="0.007171335558" />
-    <nuclide name="Si-29" wo="0.000377356542" />
-    <nuclide name="Si-30" wo="0.0002576079" />
-    <nuclide name="Cr-50" wo="0.006190885148" />
-    <nuclide name="Cr-52" wo="0.124142524198" />
-    <nuclide name="Cr-53" wo="0.014348496148" />
-    <nuclide name="Cr-54" wo="0.003638294506" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top nozzle region -->
-  <material id="10">
-    <density value="1.746" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0358870" />
-    <nuclide name="O-16"  wo="0.2847761" />
-    <nuclide name="B-10"  wo="1.15699e-4" />
-    <nuclide name="B-11"  wo="5.27075e-4" />
-    <nuclide name="Fe-54" wo="0.02644016154" />
-    <nuclide name="Fe-56" wo="0.43037146399" />
-    <nuclide name="Fe-57" wo="0.0101152584" />
-    <nuclide name="Fe-58" wo="0.00137211607" />
-    <nuclide name="Ni-58" wo="0.04104621835" />
-    <nuclide name="Ni-60" wo="0.0163554502" />
-    <nuclide name="Ni-61" wo="0.000722605975" />
-    <nuclide name="Ni-62" wo="0.002342513875" />
-    <nuclide name="Ni-64" wo="0.0006157116" />
-    <nuclide name="Mn-55" wo="0.0135739" />
-    <nuclide name="Si-28" wo="0.006234853554" />
-    <nuclide name="Si-29" wo="0.000328078746" />
-    <nuclide name="Si-30" wo="0.0002239677" />
-    <nuclide name="Cr-50" wo="0.005382452306" />
-    <nuclide name="Cr-52" wo="0.107931450781" />
-    <nuclide name="Cr-53" wo="0.012474806806" />
-    <nuclide name="Cr-54" wo="0.003163190107" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top of Fuel Assemblies -->
-  <material id="11">
-    <density value="3.044" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0162913" />
-    <nuclide name="O-16"  wo="0.1292776" />
-    <nuclide name="B-10"  wo="5.25228e-5" />
-    <nuclide name="B-11"  wo="2.39272e-4" />
-    <nuclide name="Zr-90" wo="0.43313403903" />
-    <nuclide name="Zr-91" wo="0.09549277374" />
-    <nuclide name="Zr-92" wo="0.14759527104" />
-    <nuclide name="Zr-94" wo="0.15280552077" />
-    <nuclide name="Zr-96" wo="0.02511169542" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom of Fuel Assemblies -->
-  <material id="12">
-    <density value="1.762" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0292856" />
-    <nuclide name="O-16"  wo="0.2323919" />
-    <nuclide name="B-10"  wo="9.44159e-5" />
-    <nuclide name="B-11"  wo="4.30120e-4" />
-    <nuclide name="Zr-90" wo="0.3741373658" />
-    <nuclide name="Zr-91" wo="0.0824858164" />
-    <nuclide name="Zr-92" wo="0.1274914944" />
-    <nuclide name="Zr-94" wo="0.1319920622" />
-    <nuclide name="Zr-96" wo="0.0216912612" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-</materials>
diff --git a/tests/test_score_nufission/results_true.dat b/tests/test_score_nufission/results_true.dat
index 33c4ff9fbc..31c6abe9d5 100644
--- a/tests/test_score_nufission/results_true.dat
+++ b/tests/test_score_nufission/results_true.dat
@@ -1,29 +1,29 @@
 k-combined:
-1.005983E+00 2.248579E-02
+9.903196E-01 4.279617E-02
 tally 1:
-2.486342E+00
-1.368793E+00
+3.041781E+00
+1.891714E+00
 0.000000E+00
 0.000000E+00
 0.000000E+00
 0.000000E+00
-2.733038E+00
-1.616903E+00
+1.835166E+00
+6.963265E-01
 tally 2:
-2.296157E+00
-1.167084E+00
+3.341227E+00
+2.322075E+00
 0.000000E+00
 0.000000E+00
 0.000000E+00
 0.000000E+00
-2.679940E+00
-1.498454E+00
+1.862652E+00
+7.112121E-01
 tally 3:
-2.381373E+00
-1.213497E+00
+2.975121E+00
+1.806644E+00
 0.000000E+00
 0.000000E+00
 0.000000E+00
 0.000000E+00
-2.607077E+00
-1.513932E+00
+1.846861E+00
+6.985413E-01
diff --git a/tests/test_score_nufission/settings.xml b/tests/test_score_nufission/settings.xml
deleted file mode 100644
index 517637a59f..0000000000
--- a/tests/test_score_nufission/settings.xml
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0"?>
-<settings>
-
-  <eigenvalue>
-    <batches>10</batches>
-    <inactive>5</inactive>
-    <particles>100</particles>
-  </eigenvalue>
-
-  <source>
-    <space type="box">
-      <parameters>
-        -160 -160 -183
-         160  160  183
-      </parameters>
-    </space>
-  </source>
-
-</settings>
diff --git a/tests/test_score_nufission/tallies.xml b/tests/test_score_nufission/tallies.xml
deleted file mode 100644
index 2812a00b55..0000000000
--- a/tests/test_score_nufission/tallies.xml
+++ /dev/null
@@ -1,21 +0,0 @@
-<?xml version="1.0"?>
-<tallies>
-
-  <tally id="1">
-    <filter type="cell" bins="21 22 23 27" />
-    <scores>nu-fission</scores>
-  </tally>
-
-  <tally id="2">
-    <filter type="cell" bins="21 22 23 27" />
-    <scores>nu-fission</scores>
-    <estimator>analog</estimator>
-  </tally>
-
-  <tally id="3">
-    <filter type="cell" bins="21 22 23 27" />
-    <scores>nu-fission</scores>
-    <estimator>collision</estimator>
-  </tally>
-
-</tallies>
diff --git a/tests/test_score_nufission/test_score_nufission.py b/tests/test_score_nufission/test_score_nufission.py
index 1777db993e..3d540daac7 100644
--- a/tests/test_score_nufission/test_score_nufission.py
+++ b/tests/test_score_nufission/test_score_nufission.py
@@ -1,10 +1,32 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
-from testing_harness import TestHarness
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness, PyAPITestHarness
+import openmc
+
+
+class ScoreNuFissionTestHarness(PyAPITestHarness):
+    def _build_inputs(self):
+        filt = openmc.Filter(type='cell', bins=(21, 22, 23, 27))
+        tallies = [openmc.Tally(tally_id=i) for i in range(1, 4)]
+        [t.add_filter(filt) for t in tallies]
+        [t.add_score('nu-fission') for t in tallies]
+        tallies[0].estimator = 'tracklength'
+        tallies[1].estimator = 'analog'
+        tallies[2].estimator = 'collision'
+        self._input_set.tallies = openmc.TalliesFile()
+        [self._input_set.tallies.add_tally(t) for t in tallies]
+
+        super(ScoreNuFissionTestHarness, self)._build_inputs()
+
+    def _cleanup(self):
+        super(ScoreNuFissionTestHarness, self)._cleanup()
+        f = os.path.join(os.getcwd(), 'tallies.xml')
+        if os.path.exists(f): os.remove(f)
 
 
 if __name__ == '__main__':
-    harness = TestHarness('statepoint.10.*', True)
+    harness = ScoreNuFissionTestHarness('statepoint.10.*', True)
     harness.main()
diff --git a/tests/test_score_nuscatter/geometry.xml b/tests/test_score_nuscatter/geometry.xml
deleted file mode 100644
index f6f067aadd..0000000000
--- a/tests/test_score_nuscatter/geometry.xml
+++ /dev/null
@@ -1,181 +0,0 @@
-<?xml version="1.0"?>
-<geometry>
-
-  <surface id="1" type="z-cylinder" coeffs="0. 0. 0.41" />
-  <surface id="2" type="z-cylinder" coeffs="0. 0. 0.475" />
-  <surface id="3" type="z-cylinder" coeffs="0. 0. 0.56" />
-  <surface id="4" type="z-cylinder" coeffs="0. 0. 0.62" />
-  <surface id="5" type="z-cylinder" coeffs="0. 0. 187.6" />
-  <surface id="6" type="z-cylinder" coeffs="0. 0. 209.0" />
-  <surface id="7" type="z-cylinder" coeffs="0. 0. 229.0" />
-  <surface id="8" type="z-cylinder" coeffs="0. 0. 249.0" boundary="vacuum" />
-
-  <surface id="31" type="z-plane" coeffs="-229.0" boundary="vacuum" />
-  <surface id="32" type="z-plane" coeffs="-199.0" />
-  <surface id="33" type="z-plane" coeffs="-193.0" />
-  <surface id="34" type="z-plane" coeffs="-183.0" />
-  <surface id="35" type="z-plane" coeffs="0.0" />
-  <surface id="36" type="z-plane" coeffs="183.0" />
-  <surface id="37" type="z-plane" coeffs="203.0" />
-  <surface id="38" type="z-plane" coeffs="215.0" />
-  <surface id="39" type="z-plane" coeffs="223.0" boundary="vacuum" />
-
-  <!-- All geometry on base universe -->
-  <cell id="1"  fill="200"    region="  -6 34 -35" /> <!-- Lower core -->
-  <cell id="2"  fill="201"    region="  -6 35 -36" /> <!-- Upper core -->
-  <cell id="3"  material="8"  region="  -7 31 -32" /> <!-- Lower core plate region -->
-  <cell id="4"  material="9"  region="  -5 32 -33" /> <!-- Bottom nozzle region -->
-  <cell id="5"  material="12" region="  -5 33 -34" /> <!-- Bottom FA region -->
-  <cell id="6"  material="11" region="  -5 36 -37" /> <!-- Top FA region -->
-  <cell id="7"  material="10" region="  -5 37 -38" /> <!-- Top nozzle region -->
-  <cell id="8"  material="7"  region="  -7 38 -39" /> <!-- Upper plate region -->
-  <cell id="9"  material="4"  region="6 -7 32 -38" /> <!-- Downcomer -->
-  <cell id="10" material="5"  region="7 -8 31 -39" /> <!-- RPV -->
-  <cell id="11" material="6"  region="5 -6 32 -34" /> <!-- Bottom of radial reflector -->
-  <cell id="12" material="7"  region="5 -6 36 -38" /> <!-- Top of radial reflector -->
-
-  <!-- Fuel pin, cladding, cold water -->
-  <cell id="21" universe="1" material="1" region="-1"   />
-  <cell id="22" universe="1" material="2" region="1 -2" />
-  <cell id="23" universe="1" material="3" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="24" universe="2" material="3" region="-3"   />
-  <cell id="25" universe="2" material="2" region="3 -4" />
-  <cell id="26" universe="2" material="3" region="4"    />
-
-  <!-- Fuel pin, cladding, hot water -->
-  <cell id="27" universe="3" material="1" region="-1"   />
-  <cell id="28" universe="3" material="2" region="1 -2" />
-  <cell id="29" universe="3" material="4" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="30" universe="4" material="4" region="-3"   />
-  <cell id="31" universe="4" material="2" region="3 -4" />
-  <cell id="32" universe="4" material="4" region="4"    />
-
-  <!-- cell for water assembly (cold) -->
-  <cell id="50" universe="5" material="4" region="34 -35" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="60" universe="6" fill="100"   region="34 -35" />
-
-  <!-- cell for water assembly (hot) -->
-  <cell id="70" universe="7" material="3" region="35 -36" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="80" universe="8" fill="101"   region="35 -36" />
-
-  <!-- Fuel Assembly (Lower Half) -->
-  <lattice id="100">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-    </universes>
-  </lattice>
-
-  <!-- Fuel Assembly (Upper Half) -->
-  <lattice id="101">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Lower Half) -->
-  <lattice id="200">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Upper Half) -->
-  <lattice id="201">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-    </universes>
-  </lattice>
-
-</geometry>
diff --git a/tests/test_score_nuscatter/inputs_true.dat b/tests/test_score_nuscatter/inputs_true.dat
new file mode 100644
index 0000000000..6ae99b4a17
--- /dev/null
+++ b/tests/test_score_nuscatter/inputs_true.dat
@@ -0,0 +1 @@
+c74fb5e4e8caecd11642231b55cb9442264da220329fd6a1c9959214342acd5efb4ef23368b0b018f0388a6102bce65226f6161d32f3613128d8c3762a3f6f9e
\ No newline at end of file
diff --git a/tests/test_score_nuscatter/materials.xml b/tests/test_score_nuscatter/materials.xml
deleted file mode 100644
index 9c0b74f3f1..0000000000
--- a/tests/test_score_nuscatter/materials.xml
+++ /dev/null
@@ -1,272 +0,0 @@
-<?xml version="1.0"?>
-<materials>
-
-  <default_xs>71c</default_xs>
-
-  <!-- Fuel composition -->
-  <material id="1">
-    <density value="10.062" units="g/cm3" />
-    <nuclide name="U-234"   ao="4.9476e-6" />
-    <nuclide name="U-235"   ao="4.8218e-4" />
-    <nuclide name="U-236"   ao="9.0402e-5" />
-    <nuclide name="U-238"   ao="2.1504e-2" />
-    <nuclide name="Np-237"  ao="7.3733e-6" />
-    <nuclide name="Pu-238"  ao="1.5148e-6" />
-    <nuclide name="Pu-239"  ao="1.3955e-4" />
-    <nuclide name="Pu-240"  ao="3.4405e-5" />
-    <nuclide name="Pu-241"  ao="2.1439e-5" />
-    <nuclide name="Pu-242"  ao="3.7422e-6" />
-    <nuclide name="Am-241"  ao="4.5041e-7" />
-    <nuclide name="Am-242m" ao="9.2301e-9" />
-    <nuclide name="Am-243"  ao="4.7878e-7" />
-    <nuclide name="Cm-242"  ao="1.0485e-7" />
-    <nuclide name="Cm-243"  ao="1.4268e-9" />
-    <nuclide name="Cm-244"  ao="8.8756e-8" />
-    <nuclide name="Cm-245"  ao="3.5285e-9" />
-    <nuclide name="Mo-95"   ao="2.6497e-5" />
-    <nuclide name="Tc-99"   ao="3.2772e-5" />
-    <nuclide name="Ru-101"  ao="3.0742e-5" />
-    <nuclide name="Ru-103"  ao="2.3505e-6" />
-    <nuclide name="Ag-109"  ao="2.0009e-6" />
-    <nuclide name="Xe-135"  ao="1.0801e-8" />
-    <nuclide name="Cs-133"  ao="3.4612e-5" />
-    <nuclide name="Nd-143"  ao="2.6078e-5" />
-    <nuclide name="Nd-145"  ao="1.9898e-5" />
-    <nuclide name="Sm-147"  ao="1.6128e-6" />
-    <nuclide name="Sm-149"  ao="1.1627e-7" />
-    <nuclide name="Sm-150"  ao="7.1727e-6" />
-    <nuclide name="Sm-151"  ao="5.4947e-7" />
-    <nuclide name="Sm-152"  ao="3.0221e-6" />
-    <nuclide name="Eu-153"  ao="2.6209e-6" />
-    <nuclide name="Gd-155"  ao="1.5369e-9" />
-    <nuclide name="O-16"    ao="4.5737e-2" />
-  </material>
-
-  <!-- Cladding composition -->
-  <material id="2">
-    <density value="5.77" units="g/cm3" />
-    <nuclide name="Zr-90" ao="0.5145" />
-    <nuclide name="Zr-91" ao="0.1122" />
-    <nuclide name="Zr-92" ao="0.1715" />
-    <nuclide name="Zr-94" ao="0.1738" />
-    <nuclide name="Zr-96" ao="0.0280" />
-  </material>
-
-  <!-- Cold borated water -->
-  <material id="3">
-    <density value="0.07416" units="atom/b-cm" />
-    <nuclide name="H-1" ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Hot borated water -->
-  <material id="4">
-    <density value="0.06614" units="atom/b-cm" />
-    <nuclide name="H-1"  ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- RPV Composition -->
-  <material id="5">
-    <density value="7.9" units="g/cm3" />
-    <nuclide name="Fe-54"  wo="0.05437098" />
-    <nuclide name="Fe-56"  wo="0.88500663" />
-    <nuclide name="Fe-57"  wo="0.0208008" />
-    <nuclide name="Fe-58"  wo="0.00282159" />
-    <nuclide name="Ni-58"  wo="0.0067198" />
-    <nuclide name="Ni-60"  wo="0.0026776" />
-    <nuclide name="Ni-61"  wo="0.0001183" />
-    <nuclide name="Ni-62"  wo="0.0003835" />
-    <nuclide name="Ni-64"  wo="0.0001008" />
-    <nuclide name="Mn-55"  wo="0.01" />
-    <nuclide name="Mo-92"  wo="0.000849" />
-    <nuclide name="Mo-94"  wo="0.0005418" />
-    <nuclide name="Mo-95"  wo="0.0009438" />
-    <nuclide name="Mo-96"  wo="0.0010002" />
-    <nuclide name="Mo-97"  wo="0.0005796" />
-    <nuclide name="Mo-98"  wo="0.0014814" />
-    <nuclide name="Mo-100" wo="0.0006042" />
-    <nuclide name="Si-28"  wo="0.00367464" />
-    <nuclide name="Si-29"  wo="0.00019336" />
-    <nuclide name="Si-30"  wo="0.000132" />
-    <nuclide name="Cr-50"  wo="0.00010435" />
-    <nuclide name="Cr-52"  wo="0.002092475" />
-    <nuclide name="Cr-53"  wo="0.00024185" />
-    <nuclide name="Cr-54"  wo="6.1325e-05" />
-    <nuclide name="C-Nat"  wo="0.0025" />
-    <nuclide name="Cu-63"  wo="0.0013696" />
-    <nuclide name="Cu-65"  wo="0.0006304" />
-  </material>
-
-  <!-- Lower radial reflector -->
-  <material id="6">
-    <density value="4.32" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0095661" />
-    <nuclide name="O-16"  wo="0.0759107" />
-    <nuclide name="B-10"  wo="3.08409e-5" />
-    <nuclide name="B-11"  wo="1.40499e-4" />
-    <nuclide name="Fe-54" wo="0.035620772088" />
-    <nuclide name="Fe-56" wo="0.579805982228" />
-    <nuclide name="Fe-57" wo="0.01362750048" />
-    <nuclide name="Fe-58" wo="0.001848545204" />
-    <nuclide name="Ni-58" wo="0.055298376566" />
-    <nuclide name="Ni-60" wo="0.022034425592" />
-    <nuclide name="Ni-61" wo="0.000973510811" />
-    <nuclide name="Ni-62" wo="0.003155886695" />
-    <nuclide name="Ni-64" wo="0.000829500336" />
-    <nuclide name="Mn-55" wo="0.0182870" />
-    <nuclide name="Si-28" wo="0.00839976771" />
-    <nuclide name="Si-29" wo="0.00044199679" />
-    <nuclide name="Si-30" wo="0.0003017355" />
-    <nuclide name="Cr-50" wo="0.007251360806" />
-    <nuclide name="Cr-52" wo="0.145407678031" />
-    <nuclide name="Cr-53" wo="0.016806340306" />
-    <nuclide name="Cr-54" wo="0.004261520857" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Upper radial reflector / Top plate region -->
-  <material id="7">
-    <density value="4.28" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0086117" />
-    <nuclide name="O-16"  wo="0.0683369" />
-    <nuclide name="B-10"  wo="2.77638e-5" />
-    <nuclide name="B-11"  wo="1.26481e-4" />
-    <nuclide name="Fe-54" wo="0.035953677186" />
-    <nuclide name="Fe-56" wo="0.585224740891" />
-    <nuclide name="Fe-57" wo="0.01375486056" />
-    <nuclide name="Fe-58" wo="0.001865821363" />
-    <nuclide name="Ni-58" wo="0.055815129186" />
-    <nuclide name="Ni-60" wo="0.022240333032" />
-    <nuclide name="Ni-61" wo="0.000982608081" />
-    <nuclide name="Ni-62" wo="0.003185377845" />
-    <nuclide name="Ni-64" wo="0.000837251856" />
-    <nuclide name="Mn-55" wo="0.0184579" />
-    <nuclide name="Si-28" wo="0.00847831314" />
-    <nuclide name="Si-29" wo="0.00044612986" />
-    <nuclide name="Si-30" wo="0.000304557" />
-    <nuclide name="Cr-50" wo="0.00731912987" />
-    <nuclide name="Cr-52" wo="0.146766614995" />
-    <nuclide name="Cr-53" wo="0.01696340737" />
-    <nuclide name="Cr-54" wo="0.004301347765" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom plate region -->
-  <material id="8">
-    <density value="7.184" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0011505" />
-    <nuclide name="O-16"  wo="0.0091296" />
-    <nuclide name="B-10"  wo="3.70915e-6" />
-    <nuclide name="B-11"  wo="1.68974e-5" />
-    <nuclide name="Fe-54" wo="0.03855611055" />
-    <nuclide name="Fe-56" wo="0.627585036425" />
-    <nuclide name="Fe-57" wo="0.014750478" />
-    <nuclide name="Fe-58" wo="0.002000875025" />
-    <nuclide name="Ni-58" wo="0.059855207342" />
-    <nuclide name="Ni-60" wo="0.023850159704" />
-    <nuclide name="Ni-61" wo="0.001053732407" />
-    <nuclide name="Ni-62" wo="0.003415945715" />
-    <nuclide name="Ni-64" wo="0.000897854832" />
-    <nuclide name="Mn-55" wo="0.0197940" />
-    <nuclide name="Si-28" wo="0.00909197802" />
-    <nuclide name="Si-29" wo="0.00047842098" />
-    <nuclide name="Si-30" wo="0.000326601" />
-    <nuclide name="Cr-50" wo="0.007848910646" />
-    <nuclide name="Cr-52" wo="0.157390026871" />
-    <nuclide name="Cr-53" wo="0.018191270146" />
-    <nuclide name="Cr-54" wo="0.004612692337" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom nozzle region -->
-  <material id="9">
-    <density value="2.53" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0245014" />
-    <nuclide name="O-16"  wo="0.1944274" />
-    <nuclide name="B-10"  wo="7.89917e-5" />
-    <nuclide name="B-11"  wo="3.59854e-4" />
-    <nuclide name="Fe-54" wo="0.030411411144" />
-    <nuclide name="Fe-56" wo="0.495012237964" />
-    <nuclide name="Fe-57" wo="0.01163454624" />
-    <nuclide name="Fe-58" wo="0.001578204652" />
-    <nuclide name="Ni-58" wo="0.047211231662" />
-    <nuclide name="Ni-60" wo="0.018811987544" />
-    <nuclide name="Ni-61" wo="0.000831139127" />
-    <nuclide name="Ni-62" wo="0.002694352115" />
-    <nuclide name="Ni-64" wo="0.000708189552" />
-    <nuclide name="Mn-55" wo="0.0156126" />
-    <nuclide name="Si-28" wo="0.007171335558" />
-    <nuclide name="Si-29" wo="0.000377356542" />
-    <nuclide name="Si-30" wo="0.0002576079" />
-    <nuclide name="Cr-50" wo="0.006190885148" />
-    <nuclide name="Cr-52" wo="0.124142524198" />
-    <nuclide name="Cr-53" wo="0.014348496148" />
-    <nuclide name="Cr-54" wo="0.003638294506" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top nozzle region -->
-  <material id="10">
-    <density value="1.746" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0358870" />
-    <nuclide name="O-16"  wo="0.2847761" />
-    <nuclide name="B-10"  wo="1.15699e-4" />
-    <nuclide name="B-11"  wo="5.27075e-4" />
-    <nuclide name="Fe-54" wo="0.02644016154" />
-    <nuclide name="Fe-56" wo="0.43037146399" />
-    <nuclide name="Fe-57" wo="0.0101152584" />
-    <nuclide name="Fe-58" wo="0.00137211607" />
-    <nuclide name="Ni-58" wo="0.04104621835" />
-    <nuclide name="Ni-60" wo="0.0163554502" />
-    <nuclide name="Ni-61" wo="0.000722605975" />
-    <nuclide name="Ni-62" wo="0.002342513875" />
-    <nuclide name="Ni-64" wo="0.0006157116" />
-    <nuclide name="Mn-55" wo="0.0135739" />
-    <nuclide name="Si-28" wo="0.006234853554" />
-    <nuclide name="Si-29" wo="0.000328078746" />
-    <nuclide name="Si-30" wo="0.0002239677" />
-    <nuclide name="Cr-50" wo="0.005382452306" />
-    <nuclide name="Cr-52" wo="0.107931450781" />
-    <nuclide name="Cr-53" wo="0.012474806806" />
-    <nuclide name="Cr-54" wo="0.003163190107" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top of Fuel Assemblies -->
-  <material id="11">
-    <density value="3.044" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0162913" />
-    <nuclide name="O-16"  wo="0.1292776" />
-    <nuclide name="B-10"  wo="5.25228e-5" />
-    <nuclide name="B-11"  wo="2.39272e-4" />
-    <nuclide name="Zr-90" wo="0.43313403903" />
-    <nuclide name="Zr-91" wo="0.09549277374" />
-    <nuclide name="Zr-92" wo="0.14759527104" />
-    <nuclide name="Zr-94" wo="0.15280552077" />
-    <nuclide name="Zr-96" wo="0.02511169542" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom of Fuel Assemblies -->
-  <material id="12">
-    <density value="1.762" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0292856" />
-    <nuclide name="O-16"  wo="0.2323919" />
-    <nuclide name="B-10"  wo="9.44159e-5" />
-    <nuclide name="B-11"  wo="4.30120e-4" />
-    <nuclide name="Zr-90" wo="0.3741373658" />
-    <nuclide name="Zr-91" wo="0.0824858164" />
-    <nuclide name="Zr-92" wo="0.1274914944" />
-    <nuclide name="Zr-94" wo="0.1319920622" />
-    <nuclide name="Zr-96" wo="0.0216912612" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-</materials>
diff --git a/tests/test_score_nuscatter/results_true.dat b/tests/test_score_nuscatter/results_true.dat
index 66e0c0a031..8f9fcba891 100644
--- a/tests/test_score_nuscatter/results_true.dat
+++ b/tests/test_score_nuscatter/results_true.dat
@@ -1,11 +1,11 @@
 k-combined:
-9.870214E-01 2.095925E-02
+1.034954E+00 1.782721E-02
 tally 1:
 0.000000E+00
 0.000000E+00
-3.353000E+01
-1.133379E+02
-8.150000E+00
-6.793700E+00
-1.098500E+02
-1.221333E+03
+2.514000E+01
+6.511880E+01
+6.370000E+00
+4.230900E+00
+8.547000E+01
+7.481913E+02
diff --git a/tests/test_score_nuscatter/settings.xml b/tests/test_score_nuscatter/settings.xml
deleted file mode 100644
index ce632aae31..0000000000
--- a/tests/test_score_nuscatter/settings.xml
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0"?>
-<settings>
-
-  <eigenvalue>
-    <batches>10</batches>
-    <inactive>0</inactive>
-    <particles>100</particles>
-  </eigenvalue>
-
-  <source>
-    <space type="box">
-      <parameters>
-        -160 -160 -183
-         160  160  183
-      </parameters>
-    </space>
-  </source>
-
-</settings>
diff --git a/tests/test_score_nuscatter/tallies.xml b/tests/test_score_nuscatter/tallies.xml
deleted file mode 100644
index 08f8fa32cc..0000000000
--- a/tests/test_score_nuscatter/tallies.xml
+++ /dev/null
@@ -1,9 +0,0 @@
-<?xml version="1.0"?>
-<tallies>
-
-  <tally id="1">
-    <filter type="cell" bins="10 21 22 23" />
-    <scores>nu-scatter</scores>
-  </tally>
-
-</tallies>
\ No newline at end of file
diff --git a/tests/test_score_nuscatter/test_score_nuscatter.py b/tests/test_score_nuscatter/test_score_nuscatter.py
index 1777db993e..6f33181265 100644
--- a/tests/test_score_nuscatter/test_score_nuscatter.py
+++ b/tests/test_score_nuscatter/test_score_nuscatter.py
@@ -1,10 +1,34 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
-from testing_harness import TestHarness
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness, PyAPITestHarness
+import openmc
+
+
+class ScoreNuScatterTestHarness(PyAPITestHarness):
+    def _build_inputs(self):
+        filt = openmc.Filter(type='cell', bins=(10, 21, 22, 23))
+        t = openmc.Tally(tally_id=1)
+        t.add_filter(filt)
+        t.add_score('nu-scatter')
+        self._input_set.tallies = openmc.TalliesFile()
+        self._input_set.tallies.add_tally(t)
+
+        self._input_set.build_default_materials_and_geometry()
+        self._input_set.build_default_settings()
+
+        self._input_set.settings.inactive = 0
+
+        self._input_set.export()
+
+    def _cleanup(self):
+        super(ScoreNuScatterTestHarness, self)._cleanup()
+        f = os.path.join(os.getcwd(), 'tallies.xml')
+        if os.path.exists(f): os.remove(f)
 
 
 if __name__ == '__main__':
-    harness = TestHarness('statepoint.10.*', True)
+    harness = ScoreNuScatterTestHarness('statepoint.10.*', True)
     harness.main()
diff --git a/tests/test_score_nuscatter_n/geometry.xml b/tests/test_score_nuscatter_n/geometry.xml
deleted file mode 100644
index f6f067aadd..0000000000
--- a/tests/test_score_nuscatter_n/geometry.xml
+++ /dev/null
@@ -1,181 +0,0 @@
-<?xml version="1.0"?>
-<geometry>
-
-  <surface id="1" type="z-cylinder" coeffs="0. 0. 0.41" />
-  <surface id="2" type="z-cylinder" coeffs="0. 0. 0.475" />
-  <surface id="3" type="z-cylinder" coeffs="0. 0. 0.56" />
-  <surface id="4" type="z-cylinder" coeffs="0. 0. 0.62" />
-  <surface id="5" type="z-cylinder" coeffs="0. 0. 187.6" />
-  <surface id="6" type="z-cylinder" coeffs="0. 0. 209.0" />
-  <surface id="7" type="z-cylinder" coeffs="0. 0. 229.0" />
-  <surface id="8" type="z-cylinder" coeffs="0. 0. 249.0" boundary="vacuum" />
-
-  <surface id="31" type="z-plane" coeffs="-229.0" boundary="vacuum" />
-  <surface id="32" type="z-plane" coeffs="-199.0" />
-  <surface id="33" type="z-plane" coeffs="-193.0" />
-  <surface id="34" type="z-plane" coeffs="-183.0" />
-  <surface id="35" type="z-plane" coeffs="0.0" />
-  <surface id="36" type="z-plane" coeffs="183.0" />
-  <surface id="37" type="z-plane" coeffs="203.0" />
-  <surface id="38" type="z-plane" coeffs="215.0" />
-  <surface id="39" type="z-plane" coeffs="223.0" boundary="vacuum" />
-
-  <!-- All geometry on base universe -->
-  <cell id="1"  fill="200"    region="  -6 34 -35" /> <!-- Lower core -->
-  <cell id="2"  fill="201"    region="  -6 35 -36" /> <!-- Upper core -->
-  <cell id="3"  material="8"  region="  -7 31 -32" /> <!-- Lower core plate region -->
-  <cell id="4"  material="9"  region="  -5 32 -33" /> <!-- Bottom nozzle region -->
-  <cell id="5"  material="12" region="  -5 33 -34" /> <!-- Bottom FA region -->
-  <cell id="6"  material="11" region="  -5 36 -37" /> <!-- Top FA region -->
-  <cell id="7"  material="10" region="  -5 37 -38" /> <!-- Top nozzle region -->
-  <cell id="8"  material="7"  region="  -7 38 -39" /> <!-- Upper plate region -->
-  <cell id="9"  material="4"  region="6 -7 32 -38" /> <!-- Downcomer -->
-  <cell id="10" material="5"  region="7 -8 31 -39" /> <!-- RPV -->
-  <cell id="11" material="6"  region="5 -6 32 -34" /> <!-- Bottom of radial reflector -->
-  <cell id="12" material="7"  region="5 -6 36 -38" /> <!-- Top of radial reflector -->
-
-  <!-- Fuel pin, cladding, cold water -->
-  <cell id="21" universe="1" material="1" region="-1"   />
-  <cell id="22" universe="1" material="2" region="1 -2" />
-  <cell id="23" universe="1" material="3" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="24" universe="2" material="3" region="-3"   />
-  <cell id="25" universe="2" material="2" region="3 -4" />
-  <cell id="26" universe="2" material="3" region="4"    />
-
-  <!-- Fuel pin, cladding, hot water -->
-  <cell id="27" universe="3" material="1" region="-1"   />
-  <cell id="28" universe="3" material="2" region="1 -2" />
-  <cell id="29" universe="3" material="4" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="30" universe="4" material="4" region="-3"   />
-  <cell id="31" universe="4" material="2" region="3 -4" />
-  <cell id="32" universe="4" material="4" region="4"    />
-
-  <!-- cell for water assembly (cold) -->
-  <cell id="50" universe="5" material="4" region="34 -35" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="60" universe="6" fill="100"   region="34 -35" />
-
-  <!-- cell for water assembly (hot) -->
-  <cell id="70" universe="7" material="3" region="35 -36" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="80" universe="8" fill="101"   region="35 -36" />
-
-  <!-- Fuel Assembly (Lower Half) -->
-  <lattice id="100">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-    </universes>
-  </lattice>
-
-  <!-- Fuel Assembly (Upper Half) -->
-  <lattice id="101">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Lower Half) -->
-  <lattice id="200">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Upper Half) -->
-  <lattice id="201">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-    </universes>
-  </lattice>
-
-</geometry>
diff --git a/tests/test_score_nuscatter_n/inputs_true.dat b/tests/test_score_nuscatter_n/inputs_true.dat
new file mode 100644
index 0000000000..c7924a247a
--- /dev/null
+++ b/tests/test_score_nuscatter_n/inputs_true.dat
@@ -0,0 +1 @@
+c184ef2764fa23db32253ec4c23d36cf842f173a0a57c93cb165faf771f2ff23346756160ba5793c558448283eb0917d23e3871753ea2b7e3e24f14d6cf4179f
\ No newline at end of file
diff --git a/tests/test_score_nuscatter_n/materials.xml b/tests/test_score_nuscatter_n/materials.xml
deleted file mode 100644
index 9c0b74f3f1..0000000000
--- a/tests/test_score_nuscatter_n/materials.xml
+++ /dev/null
@@ -1,272 +0,0 @@
-<?xml version="1.0"?>
-<materials>
-
-  <default_xs>71c</default_xs>
-
-  <!-- Fuel composition -->
-  <material id="1">
-    <density value="10.062" units="g/cm3" />
-    <nuclide name="U-234"   ao="4.9476e-6" />
-    <nuclide name="U-235"   ao="4.8218e-4" />
-    <nuclide name="U-236"   ao="9.0402e-5" />
-    <nuclide name="U-238"   ao="2.1504e-2" />
-    <nuclide name="Np-237"  ao="7.3733e-6" />
-    <nuclide name="Pu-238"  ao="1.5148e-6" />
-    <nuclide name="Pu-239"  ao="1.3955e-4" />
-    <nuclide name="Pu-240"  ao="3.4405e-5" />
-    <nuclide name="Pu-241"  ao="2.1439e-5" />
-    <nuclide name="Pu-242"  ao="3.7422e-6" />
-    <nuclide name="Am-241"  ao="4.5041e-7" />
-    <nuclide name="Am-242m" ao="9.2301e-9" />
-    <nuclide name="Am-243"  ao="4.7878e-7" />
-    <nuclide name="Cm-242"  ao="1.0485e-7" />
-    <nuclide name="Cm-243"  ao="1.4268e-9" />
-    <nuclide name="Cm-244"  ao="8.8756e-8" />
-    <nuclide name="Cm-245"  ao="3.5285e-9" />
-    <nuclide name="Mo-95"   ao="2.6497e-5" />
-    <nuclide name="Tc-99"   ao="3.2772e-5" />
-    <nuclide name="Ru-101"  ao="3.0742e-5" />
-    <nuclide name="Ru-103"  ao="2.3505e-6" />
-    <nuclide name="Ag-109"  ao="2.0009e-6" />
-    <nuclide name="Xe-135"  ao="1.0801e-8" />
-    <nuclide name="Cs-133"  ao="3.4612e-5" />
-    <nuclide name="Nd-143"  ao="2.6078e-5" />
-    <nuclide name="Nd-145"  ao="1.9898e-5" />
-    <nuclide name="Sm-147"  ao="1.6128e-6" />
-    <nuclide name="Sm-149"  ao="1.1627e-7" />
-    <nuclide name="Sm-150"  ao="7.1727e-6" />
-    <nuclide name="Sm-151"  ao="5.4947e-7" />
-    <nuclide name="Sm-152"  ao="3.0221e-6" />
-    <nuclide name="Eu-153"  ao="2.6209e-6" />
-    <nuclide name="Gd-155"  ao="1.5369e-9" />
-    <nuclide name="O-16"    ao="4.5737e-2" />
-  </material>
-
-  <!-- Cladding composition -->
-  <material id="2">
-    <density value="5.77" units="g/cm3" />
-    <nuclide name="Zr-90" ao="0.5145" />
-    <nuclide name="Zr-91" ao="0.1122" />
-    <nuclide name="Zr-92" ao="0.1715" />
-    <nuclide name="Zr-94" ao="0.1738" />
-    <nuclide name="Zr-96" ao="0.0280" />
-  </material>
-
-  <!-- Cold borated water -->
-  <material id="3">
-    <density value="0.07416" units="atom/b-cm" />
-    <nuclide name="H-1" ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Hot borated water -->
-  <material id="4">
-    <density value="0.06614" units="atom/b-cm" />
-    <nuclide name="H-1"  ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- RPV Composition -->
-  <material id="5">
-    <density value="7.9" units="g/cm3" />
-    <nuclide name="Fe-54"  wo="0.05437098" />
-    <nuclide name="Fe-56"  wo="0.88500663" />
-    <nuclide name="Fe-57"  wo="0.0208008" />
-    <nuclide name="Fe-58"  wo="0.00282159" />
-    <nuclide name="Ni-58"  wo="0.0067198" />
-    <nuclide name="Ni-60"  wo="0.0026776" />
-    <nuclide name="Ni-61"  wo="0.0001183" />
-    <nuclide name="Ni-62"  wo="0.0003835" />
-    <nuclide name="Ni-64"  wo="0.0001008" />
-    <nuclide name="Mn-55"  wo="0.01" />
-    <nuclide name="Mo-92"  wo="0.000849" />
-    <nuclide name="Mo-94"  wo="0.0005418" />
-    <nuclide name="Mo-95"  wo="0.0009438" />
-    <nuclide name="Mo-96"  wo="0.0010002" />
-    <nuclide name="Mo-97"  wo="0.0005796" />
-    <nuclide name="Mo-98"  wo="0.0014814" />
-    <nuclide name="Mo-100" wo="0.0006042" />
-    <nuclide name="Si-28"  wo="0.00367464" />
-    <nuclide name="Si-29"  wo="0.00019336" />
-    <nuclide name="Si-30"  wo="0.000132" />
-    <nuclide name="Cr-50"  wo="0.00010435" />
-    <nuclide name="Cr-52"  wo="0.002092475" />
-    <nuclide name="Cr-53"  wo="0.00024185" />
-    <nuclide name="Cr-54"  wo="6.1325e-05" />
-    <nuclide name="C-Nat"  wo="0.0025" />
-    <nuclide name="Cu-63"  wo="0.0013696" />
-    <nuclide name="Cu-65"  wo="0.0006304" />
-  </material>
-
-  <!-- Lower radial reflector -->
-  <material id="6">
-    <density value="4.32" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0095661" />
-    <nuclide name="O-16"  wo="0.0759107" />
-    <nuclide name="B-10"  wo="3.08409e-5" />
-    <nuclide name="B-11"  wo="1.40499e-4" />
-    <nuclide name="Fe-54" wo="0.035620772088" />
-    <nuclide name="Fe-56" wo="0.579805982228" />
-    <nuclide name="Fe-57" wo="0.01362750048" />
-    <nuclide name="Fe-58" wo="0.001848545204" />
-    <nuclide name="Ni-58" wo="0.055298376566" />
-    <nuclide name="Ni-60" wo="0.022034425592" />
-    <nuclide name="Ni-61" wo="0.000973510811" />
-    <nuclide name="Ni-62" wo="0.003155886695" />
-    <nuclide name="Ni-64" wo="0.000829500336" />
-    <nuclide name="Mn-55" wo="0.0182870" />
-    <nuclide name="Si-28" wo="0.00839976771" />
-    <nuclide name="Si-29" wo="0.00044199679" />
-    <nuclide name="Si-30" wo="0.0003017355" />
-    <nuclide name="Cr-50" wo="0.007251360806" />
-    <nuclide name="Cr-52" wo="0.145407678031" />
-    <nuclide name="Cr-53" wo="0.016806340306" />
-    <nuclide name="Cr-54" wo="0.004261520857" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Upper radial reflector / Top plate region -->
-  <material id="7">
-    <density value="4.28" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0086117" />
-    <nuclide name="O-16"  wo="0.0683369" />
-    <nuclide name="B-10"  wo="2.77638e-5" />
-    <nuclide name="B-11"  wo="1.26481e-4" />
-    <nuclide name="Fe-54" wo="0.035953677186" />
-    <nuclide name="Fe-56" wo="0.585224740891" />
-    <nuclide name="Fe-57" wo="0.01375486056" />
-    <nuclide name="Fe-58" wo="0.001865821363" />
-    <nuclide name="Ni-58" wo="0.055815129186" />
-    <nuclide name="Ni-60" wo="0.022240333032" />
-    <nuclide name="Ni-61" wo="0.000982608081" />
-    <nuclide name="Ni-62" wo="0.003185377845" />
-    <nuclide name="Ni-64" wo="0.000837251856" />
-    <nuclide name="Mn-55" wo="0.0184579" />
-    <nuclide name="Si-28" wo="0.00847831314" />
-    <nuclide name="Si-29" wo="0.00044612986" />
-    <nuclide name="Si-30" wo="0.000304557" />
-    <nuclide name="Cr-50" wo="0.00731912987" />
-    <nuclide name="Cr-52" wo="0.146766614995" />
-    <nuclide name="Cr-53" wo="0.01696340737" />
-    <nuclide name="Cr-54" wo="0.004301347765" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom plate region -->
-  <material id="8">
-    <density value="7.184" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0011505" />
-    <nuclide name="O-16"  wo="0.0091296" />
-    <nuclide name="B-10"  wo="3.70915e-6" />
-    <nuclide name="B-11"  wo="1.68974e-5" />
-    <nuclide name="Fe-54" wo="0.03855611055" />
-    <nuclide name="Fe-56" wo="0.627585036425" />
-    <nuclide name="Fe-57" wo="0.014750478" />
-    <nuclide name="Fe-58" wo="0.002000875025" />
-    <nuclide name="Ni-58" wo="0.059855207342" />
-    <nuclide name="Ni-60" wo="0.023850159704" />
-    <nuclide name="Ni-61" wo="0.001053732407" />
-    <nuclide name="Ni-62" wo="0.003415945715" />
-    <nuclide name="Ni-64" wo="0.000897854832" />
-    <nuclide name="Mn-55" wo="0.0197940" />
-    <nuclide name="Si-28" wo="0.00909197802" />
-    <nuclide name="Si-29" wo="0.00047842098" />
-    <nuclide name="Si-30" wo="0.000326601" />
-    <nuclide name="Cr-50" wo="0.007848910646" />
-    <nuclide name="Cr-52" wo="0.157390026871" />
-    <nuclide name="Cr-53" wo="0.018191270146" />
-    <nuclide name="Cr-54" wo="0.004612692337" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom nozzle region -->
-  <material id="9">
-    <density value="2.53" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0245014" />
-    <nuclide name="O-16"  wo="0.1944274" />
-    <nuclide name="B-10"  wo="7.89917e-5" />
-    <nuclide name="B-11"  wo="3.59854e-4" />
-    <nuclide name="Fe-54" wo="0.030411411144" />
-    <nuclide name="Fe-56" wo="0.495012237964" />
-    <nuclide name="Fe-57" wo="0.01163454624" />
-    <nuclide name="Fe-58" wo="0.001578204652" />
-    <nuclide name="Ni-58" wo="0.047211231662" />
-    <nuclide name="Ni-60" wo="0.018811987544" />
-    <nuclide name="Ni-61" wo="0.000831139127" />
-    <nuclide name="Ni-62" wo="0.002694352115" />
-    <nuclide name="Ni-64" wo="0.000708189552" />
-    <nuclide name="Mn-55" wo="0.0156126" />
-    <nuclide name="Si-28" wo="0.007171335558" />
-    <nuclide name="Si-29" wo="0.000377356542" />
-    <nuclide name="Si-30" wo="0.0002576079" />
-    <nuclide name="Cr-50" wo="0.006190885148" />
-    <nuclide name="Cr-52" wo="0.124142524198" />
-    <nuclide name="Cr-53" wo="0.014348496148" />
-    <nuclide name="Cr-54" wo="0.003638294506" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top nozzle region -->
-  <material id="10">
-    <density value="1.746" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0358870" />
-    <nuclide name="O-16"  wo="0.2847761" />
-    <nuclide name="B-10"  wo="1.15699e-4" />
-    <nuclide name="B-11"  wo="5.27075e-4" />
-    <nuclide name="Fe-54" wo="0.02644016154" />
-    <nuclide name="Fe-56" wo="0.43037146399" />
-    <nuclide name="Fe-57" wo="0.0101152584" />
-    <nuclide name="Fe-58" wo="0.00137211607" />
-    <nuclide name="Ni-58" wo="0.04104621835" />
-    <nuclide name="Ni-60" wo="0.0163554502" />
-    <nuclide name="Ni-61" wo="0.000722605975" />
-    <nuclide name="Ni-62" wo="0.002342513875" />
-    <nuclide name="Ni-64" wo="0.0006157116" />
-    <nuclide name="Mn-55" wo="0.0135739" />
-    <nuclide name="Si-28" wo="0.006234853554" />
-    <nuclide name="Si-29" wo="0.000328078746" />
-    <nuclide name="Si-30" wo="0.0002239677" />
-    <nuclide name="Cr-50" wo="0.005382452306" />
-    <nuclide name="Cr-52" wo="0.107931450781" />
-    <nuclide name="Cr-53" wo="0.012474806806" />
-    <nuclide name="Cr-54" wo="0.003163190107" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top of Fuel Assemblies -->
-  <material id="11">
-    <density value="3.044" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0162913" />
-    <nuclide name="O-16"  wo="0.1292776" />
-    <nuclide name="B-10"  wo="5.25228e-5" />
-    <nuclide name="B-11"  wo="2.39272e-4" />
-    <nuclide name="Zr-90" wo="0.43313403903" />
-    <nuclide name="Zr-91" wo="0.09549277374" />
-    <nuclide name="Zr-92" wo="0.14759527104" />
-    <nuclide name="Zr-94" wo="0.15280552077" />
-    <nuclide name="Zr-96" wo="0.02511169542" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom of Fuel Assemblies -->
-  <material id="12">
-    <density value="1.762" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0292856" />
-    <nuclide name="O-16"  wo="0.2323919" />
-    <nuclide name="B-10"  wo="9.44159e-5" />
-    <nuclide name="B-11"  wo="4.30120e-4" />
-    <nuclide name="Zr-90" wo="0.3741373658" />
-    <nuclide name="Zr-91" wo="0.0824858164" />
-    <nuclide name="Zr-92" wo="0.1274914944" />
-    <nuclide name="Zr-94" wo="0.1319920622" />
-    <nuclide name="Zr-96" wo="0.0216912612" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-</materials>
diff --git a/tests/test_score_nuscatter_n/results_true.dat b/tests/test_score_nuscatter_n/results_true.dat
index 5dbc7f8abf..0c1315807f 100644
--- a/tests/test_score_nuscatter_n/results_true.dat
+++ b/tests/test_score_nuscatter_n/results_true.dat
@@ -1,33 +1,33 @@
 k-combined:
-9.870214E-01 2.095925E-02
+1.034954E+00 1.782721E-02
 tally 1:
-3.353000E+01
-1.133379E+02
-3.491100E+00
-1.265776E+00
-1.948509E+00
-4.761101E-01
-9.177045E-01
-1.251750E-01
-5.654249E-01
-5.567043E-02
-8.150000E+00
-6.793700E+00
-1.223263E+00
-1.678053E-01
-7.833173E-01
-8.407682E-02
-1.350170E-01
-7.393546E-03
-2.164837E-01
-1.367122E-02
-1.098500E+02
-1.221333E+03
-5.598624E+01
-3.183267E+02
-2.048716E+01
-4.301097E+01
-1.399456E+00
-4.458904E-01
--2.183180E+00
-6.628474E-01
+2.514000E+01
+6.511880E+01
+2.724740E+00
+8.378120E-01
+1.521255E+00
+2.667071E-01
+7.903706E-01
+1.216244E-01
+5.770120E-01
+5.508594E-02
+6.370000E+00
+4.230900E+00
+8.075261E-01
+9.047897E-02
+5.879624E-01
+4.107777E-02
+2.034636E-01
+8.243025E-03
+-2.744502E-02
+1.515916E-03
+8.547000E+01
+7.481913E+02
+4.446994E+01
+2.016855E+02
+1.664683E+01
+2.837713E+01
+1.373176E+00
+3.329601E-01
+-1.663772E+00
+4.264485E-01
diff --git a/tests/test_score_nuscatter_n/settings.xml b/tests/test_score_nuscatter_n/settings.xml
deleted file mode 100644
index ce632aae31..0000000000
--- a/tests/test_score_nuscatter_n/settings.xml
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0"?>
-<settings>
-
-  <eigenvalue>
-    <batches>10</batches>
-    <inactive>0</inactive>
-    <particles>100</particles>
-  </eigenvalue>
-
-  <source>
-    <space type="box">
-      <parameters>
-        -160 -160 -183
-         160  160  183
-      </parameters>
-    </space>
-  </source>
-
-</settings>
diff --git a/tests/test_score_nuscatter_n/tallies.xml b/tests/test_score_nuscatter_n/tallies.xml
deleted file mode 100644
index 90e28227b6..0000000000
--- a/tests/test_score_nuscatter_n/tallies.xml
+++ /dev/null
@@ -1,9 +0,0 @@
-<?xml version="1.0"?>
-<tallies>
-
-  <tally id="1">
-    <filter type="cell" bins="21 22 23" />
-    <scores>nu-scatter nu-scatter-1 nu-scatter-2 nu-scatter-3 nu-scatter-4</scores>
-  </tally>
-
-</tallies>
diff --git a/tests/test_score_nuscatter_n/test_score_nuscatter_n.py b/tests/test_score_nuscatter_n/test_score_nuscatter_n.py
index 1777db993e..40029bd02c 100644
--- a/tests/test_score_nuscatter_n/test_score_nuscatter_n.py
+++ b/tests/test_score_nuscatter_n/test_score_nuscatter_n.py
@@ -1,10 +1,38 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
-from testing_harness import TestHarness
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness, PyAPITestHarness
+import openmc
+
+
+class ScoreNuScatterNTestHarness(PyAPITestHarness):
+    def _build_inputs(self):
+        filt = openmc.Filter(type='cell', bins=(21, 22, 23))
+        t = openmc.Tally(tally_id=1)
+        t.add_filter(filt)
+        t.add_score('nu-scatter')
+        t.add_score('nu-scatter-1')
+        t.add_score('nu-scatter-2')
+        t.add_score('nu-scatter-3')
+        t.add_score('nu-scatter-4')
+        self._input_set.tallies = openmc.TalliesFile()
+        self._input_set.tallies.add_tally(t)
+
+        self._input_set.build_default_materials_and_geometry()
+        self._input_set.build_default_settings()
+
+        self._input_set.settings.inactive = 0
+
+        self._input_set.export()
+
+    def _cleanup(self):
+        super(ScoreNuScatterNTestHarness, self)._cleanup()
+        f = os.path.join(os.getcwd(), 'tallies.xml')
+        if os.path.exists(f): os.remove(f)
 
 
 if __name__ == '__main__':
-    harness = TestHarness('statepoint.10.*', True)
+    harness = ScoreNuScatterNTestHarness('statepoint.10.*', True)
     harness.main()
diff --git a/tests/test_score_nuscatter_pn/geometry.xml b/tests/test_score_nuscatter_pn/geometry.xml
deleted file mode 100644
index f6f067aadd..0000000000
--- a/tests/test_score_nuscatter_pn/geometry.xml
+++ /dev/null
@@ -1,181 +0,0 @@
-<?xml version="1.0"?>
-<geometry>
-
-  <surface id="1" type="z-cylinder" coeffs="0. 0. 0.41" />
-  <surface id="2" type="z-cylinder" coeffs="0. 0. 0.475" />
-  <surface id="3" type="z-cylinder" coeffs="0. 0. 0.56" />
-  <surface id="4" type="z-cylinder" coeffs="0. 0. 0.62" />
-  <surface id="5" type="z-cylinder" coeffs="0. 0. 187.6" />
-  <surface id="6" type="z-cylinder" coeffs="0. 0. 209.0" />
-  <surface id="7" type="z-cylinder" coeffs="0. 0. 229.0" />
-  <surface id="8" type="z-cylinder" coeffs="0. 0. 249.0" boundary="vacuum" />
-
-  <surface id="31" type="z-plane" coeffs="-229.0" boundary="vacuum" />
-  <surface id="32" type="z-plane" coeffs="-199.0" />
-  <surface id="33" type="z-plane" coeffs="-193.0" />
-  <surface id="34" type="z-plane" coeffs="-183.0" />
-  <surface id="35" type="z-plane" coeffs="0.0" />
-  <surface id="36" type="z-plane" coeffs="183.0" />
-  <surface id="37" type="z-plane" coeffs="203.0" />
-  <surface id="38" type="z-plane" coeffs="215.0" />
-  <surface id="39" type="z-plane" coeffs="223.0" boundary="vacuum" />
-
-  <!-- All geometry on base universe -->
-  <cell id="1"  fill="200"    region="  -6 34 -35" /> <!-- Lower core -->
-  <cell id="2"  fill="201"    region="  -6 35 -36" /> <!-- Upper core -->
-  <cell id="3"  material="8"  region="  -7 31 -32" /> <!-- Lower core plate region -->
-  <cell id="4"  material="9"  region="  -5 32 -33" /> <!-- Bottom nozzle region -->
-  <cell id="5"  material="12" region="  -5 33 -34" /> <!-- Bottom FA region -->
-  <cell id="6"  material="11" region="  -5 36 -37" /> <!-- Top FA region -->
-  <cell id="7"  material="10" region="  -5 37 -38" /> <!-- Top nozzle region -->
-  <cell id="8"  material="7"  region="  -7 38 -39" /> <!-- Upper plate region -->
-  <cell id="9"  material="4"  region="6 -7 32 -38" /> <!-- Downcomer -->
-  <cell id="10" material="5"  region="7 -8 31 -39" /> <!-- RPV -->
-  <cell id="11" material="6"  region="5 -6 32 -34" /> <!-- Bottom of radial reflector -->
-  <cell id="12" material="7"  region="5 -6 36 -38" /> <!-- Top of radial reflector -->
-
-  <!-- Fuel pin, cladding, cold water -->
-  <cell id="21" universe="1" material="1" region="-1"   />
-  <cell id="22" universe="1" material="2" region="1 -2" />
-  <cell id="23" universe="1" material="3" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="24" universe="2" material="3" region="-3"   />
-  <cell id="25" universe="2" material="2" region="3 -4" />
-  <cell id="26" universe="2" material="3" region="4"    />
-
-  <!-- Fuel pin, cladding, hot water -->
-  <cell id="27" universe="3" material="1" region="-1"   />
-  <cell id="28" universe="3" material="2" region="1 -2" />
-  <cell id="29" universe="3" material="4" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="30" universe="4" material="4" region="-3"   />
-  <cell id="31" universe="4" material="2" region="3 -4" />
-  <cell id="32" universe="4" material="4" region="4"    />
-
-  <!-- cell for water assembly (cold) -->
-  <cell id="50" universe="5" material="4" region="34 -35" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="60" universe="6" fill="100"   region="34 -35" />
-
-  <!-- cell for water assembly (hot) -->
-  <cell id="70" universe="7" material="3" region="35 -36" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="80" universe="8" fill="101"   region="35 -36" />
-
-  <!-- Fuel Assembly (Lower Half) -->
-  <lattice id="100">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-    </universes>
-  </lattice>
-
-  <!-- Fuel Assembly (Upper Half) -->
-  <lattice id="101">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Lower Half) -->
-  <lattice id="200">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Upper Half) -->
-  <lattice id="201">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-    </universes>
-  </lattice>
-
-</geometry>
diff --git a/tests/test_score_nuscatter_pn/inputs_true.dat b/tests/test_score_nuscatter_pn/inputs_true.dat
new file mode 100644
index 0000000000..30a894dafb
--- /dev/null
+++ b/tests/test_score_nuscatter_pn/inputs_true.dat
@@ -0,0 +1 @@
+79d74ffe32f564b83bdde94048f57233454881f3b55413e9b5e30ce4b9813ff6436dca98d691d941d5f31947f2215dcb656369c2b32e6240e1424e6aad96395e
\ No newline at end of file
diff --git a/tests/test_score_nuscatter_pn/materials.xml b/tests/test_score_nuscatter_pn/materials.xml
deleted file mode 100644
index 9c0b74f3f1..0000000000
--- a/tests/test_score_nuscatter_pn/materials.xml
+++ /dev/null
@@ -1,272 +0,0 @@
-<?xml version="1.0"?>
-<materials>
-
-  <default_xs>71c</default_xs>
-
-  <!-- Fuel composition -->
-  <material id="1">
-    <density value="10.062" units="g/cm3" />
-    <nuclide name="U-234"   ao="4.9476e-6" />
-    <nuclide name="U-235"   ao="4.8218e-4" />
-    <nuclide name="U-236"   ao="9.0402e-5" />
-    <nuclide name="U-238"   ao="2.1504e-2" />
-    <nuclide name="Np-237"  ao="7.3733e-6" />
-    <nuclide name="Pu-238"  ao="1.5148e-6" />
-    <nuclide name="Pu-239"  ao="1.3955e-4" />
-    <nuclide name="Pu-240"  ao="3.4405e-5" />
-    <nuclide name="Pu-241"  ao="2.1439e-5" />
-    <nuclide name="Pu-242"  ao="3.7422e-6" />
-    <nuclide name="Am-241"  ao="4.5041e-7" />
-    <nuclide name="Am-242m" ao="9.2301e-9" />
-    <nuclide name="Am-243"  ao="4.7878e-7" />
-    <nuclide name="Cm-242"  ao="1.0485e-7" />
-    <nuclide name="Cm-243"  ao="1.4268e-9" />
-    <nuclide name="Cm-244"  ao="8.8756e-8" />
-    <nuclide name="Cm-245"  ao="3.5285e-9" />
-    <nuclide name="Mo-95"   ao="2.6497e-5" />
-    <nuclide name="Tc-99"   ao="3.2772e-5" />
-    <nuclide name="Ru-101"  ao="3.0742e-5" />
-    <nuclide name="Ru-103"  ao="2.3505e-6" />
-    <nuclide name="Ag-109"  ao="2.0009e-6" />
-    <nuclide name="Xe-135"  ao="1.0801e-8" />
-    <nuclide name="Cs-133"  ao="3.4612e-5" />
-    <nuclide name="Nd-143"  ao="2.6078e-5" />
-    <nuclide name="Nd-145"  ao="1.9898e-5" />
-    <nuclide name="Sm-147"  ao="1.6128e-6" />
-    <nuclide name="Sm-149"  ao="1.1627e-7" />
-    <nuclide name="Sm-150"  ao="7.1727e-6" />
-    <nuclide name="Sm-151"  ao="5.4947e-7" />
-    <nuclide name="Sm-152"  ao="3.0221e-6" />
-    <nuclide name="Eu-153"  ao="2.6209e-6" />
-    <nuclide name="Gd-155"  ao="1.5369e-9" />
-    <nuclide name="O-16"    ao="4.5737e-2" />
-  </material>
-
-  <!-- Cladding composition -->
-  <material id="2">
-    <density value="5.77" units="g/cm3" />
-    <nuclide name="Zr-90" ao="0.5145" />
-    <nuclide name="Zr-91" ao="0.1122" />
-    <nuclide name="Zr-92" ao="0.1715" />
-    <nuclide name="Zr-94" ao="0.1738" />
-    <nuclide name="Zr-96" ao="0.0280" />
-  </material>
-
-  <!-- Cold borated water -->
-  <material id="3">
-    <density value="0.07416" units="atom/b-cm" />
-    <nuclide name="H-1" ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Hot borated water -->
-  <material id="4">
-    <density value="0.06614" units="atom/b-cm" />
-    <nuclide name="H-1"  ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- RPV Composition -->
-  <material id="5">
-    <density value="7.9" units="g/cm3" />
-    <nuclide name="Fe-54"  wo="0.05437098" />
-    <nuclide name="Fe-56"  wo="0.88500663" />
-    <nuclide name="Fe-57"  wo="0.0208008" />
-    <nuclide name="Fe-58"  wo="0.00282159" />
-    <nuclide name="Ni-58"  wo="0.0067198" />
-    <nuclide name="Ni-60"  wo="0.0026776" />
-    <nuclide name="Ni-61"  wo="0.0001183" />
-    <nuclide name="Ni-62"  wo="0.0003835" />
-    <nuclide name="Ni-64"  wo="0.0001008" />
-    <nuclide name="Mn-55"  wo="0.01" />
-    <nuclide name="Mo-92"  wo="0.000849" />
-    <nuclide name="Mo-94"  wo="0.0005418" />
-    <nuclide name="Mo-95"  wo="0.0009438" />
-    <nuclide name="Mo-96"  wo="0.0010002" />
-    <nuclide name="Mo-97"  wo="0.0005796" />
-    <nuclide name="Mo-98"  wo="0.0014814" />
-    <nuclide name="Mo-100" wo="0.0006042" />
-    <nuclide name="Si-28"  wo="0.00367464" />
-    <nuclide name="Si-29"  wo="0.00019336" />
-    <nuclide name="Si-30"  wo="0.000132" />
-    <nuclide name="Cr-50"  wo="0.00010435" />
-    <nuclide name="Cr-52"  wo="0.002092475" />
-    <nuclide name="Cr-53"  wo="0.00024185" />
-    <nuclide name="Cr-54"  wo="6.1325e-05" />
-    <nuclide name="C-Nat"  wo="0.0025" />
-    <nuclide name="Cu-63"  wo="0.0013696" />
-    <nuclide name="Cu-65"  wo="0.0006304" />
-  </material>
-
-  <!-- Lower radial reflector -->
-  <material id="6">
-    <density value="4.32" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0095661" />
-    <nuclide name="O-16"  wo="0.0759107" />
-    <nuclide name="B-10"  wo="3.08409e-5" />
-    <nuclide name="B-11"  wo="1.40499e-4" />
-    <nuclide name="Fe-54" wo="0.035620772088" />
-    <nuclide name="Fe-56" wo="0.579805982228" />
-    <nuclide name="Fe-57" wo="0.01362750048" />
-    <nuclide name="Fe-58" wo="0.001848545204" />
-    <nuclide name="Ni-58" wo="0.055298376566" />
-    <nuclide name="Ni-60" wo="0.022034425592" />
-    <nuclide name="Ni-61" wo="0.000973510811" />
-    <nuclide name="Ni-62" wo="0.003155886695" />
-    <nuclide name="Ni-64" wo="0.000829500336" />
-    <nuclide name="Mn-55" wo="0.0182870" />
-    <nuclide name="Si-28" wo="0.00839976771" />
-    <nuclide name="Si-29" wo="0.00044199679" />
-    <nuclide name="Si-30" wo="0.0003017355" />
-    <nuclide name="Cr-50" wo="0.007251360806" />
-    <nuclide name="Cr-52" wo="0.145407678031" />
-    <nuclide name="Cr-53" wo="0.016806340306" />
-    <nuclide name="Cr-54" wo="0.004261520857" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Upper radial reflector / Top plate region -->
-  <material id="7">
-    <density value="4.28" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0086117" />
-    <nuclide name="O-16"  wo="0.0683369" />
-    <nuclide name="B-10"  wo="2.77638e-5" />
-    <nuclide name="B-11"  wo="1.26481e-4" />
-    <nuclide name="Fe-54" wo="0.035953677186" />
-    <nuclide name="Fe-56" wo="0.585224740891" />
-    <nuclide name="Fe-57" wo="0.01375486056" />
-    <nuclide name="Fe-58" wo="0.001865821363" />
-    <nuclide name="Ni-58" wo="0.055815129186" />
-    <nuclide name="Ni-60" wo="0.022240333032" />
-    <nuclide name="Ni-61" wo="0.000982608081" />
-    <nuclide name="Ni-62" wo="0.003185377845" />
-    <nuclide name="Ni-64" wo="0.000837251856" />
-    <nuclide name="Mn-55" wo="0.0184579" />
-    <nuclide name="Si-28" wo="0.00847831314" />
-    <nuclide name="Si-29" wo="0.00044612986" />
-    <nuclide name="Si-30" wo="0.000304557" />
-    <nuclide name="Cr-50" wo="0.00731912987" />
-    <nuclide name="Cr-52" wo="0.146766614995" />
-    <nuclide name="Cr-53" wo="0.01696340737" />
-    <nuclide name="Cr-54" wo="0.004301347765" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom plate region -->
-  <material id="8">
-    <density value="7.184" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0011505" />
-    <nuclide name="O-16"  wo="0.0091296" />
-    <nuclide name="B-10"  wo="3.70915e-6" />
-    <nuclide name="B-11"  wo="1.68974e-5" />
-    <nuclide name="Fe-54" wo="0.03855611055" />
-    <nuclide name="Fe-56" wo="0.627585036425" />
-    <nuclide name="Fe-57" wo="0.014750478" />
-    <nuclide name="Fe-58" wo="0.002000875025" />
-    <nuclide name="Ni-58" wo="0.059855207342" />
-    <nuclide name="Ni-60" wo="0.023850159704" />
-    <nuclide name="Ni-61" wo="0.001053732407" />
-    <nuclide name="Ni-62" wo="0.003415945715" />
-    <nuclide name="Ni-64" wo="0.000897854832" />
-    <nuclide name="Mn-55" wo="0.0197940" />
-    <nuclide name="Si-28" wo="0.00909197802" />
-    <nuclide name="Si-29" wo="0.00047842098" />
-    <nuclide name="Si-30" wo="0.000326601" />
-    <nuclide name="Cr-50" wo="0.007848910646" />
-    <nuclide name="Cr-52" wo="0.157390026871" />
-    <nuclide name="Cr-53" wo="0.018191270146" />
-    <nuclide name="Cr-54" wo="0.004612692337" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom nozzle region -->
-  <material id="9">
-    <density value="2.53" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0245014" />
-    <nuclide name="O-16"  wo="0.1944274" />
-    <nuclide name="B-10"  wo="7.89917e-5" />
-    <nuclide name="B-11"  wo="3.59854e-4" />
-    <nuclide name="Fe-54" wo="0.030411411144" />
-    <nuclide name="Fe-56" wo="0.495012237964" />
-    <nuclide name="Fe-57" wo="0.01163454624" />
-    <nuclide name="Fe-58" wo="0.001578204652" />
-    <nuclide name="Ni-58" wo="0.047211231662" />
-    <nuclide name="Ni-60" wo="0.018811987544" />
-    <nuclide name="Ni-61" wo="0.000831139127" />
-    <nuclide name="Ni-62" wo="0.002694352115" />
-    <nuclide name="Ni-64" wo="0.000708189552" />
-    <nuclide name="Mn-55" wo="0.0156126" />
-    <nuclide name="Si-28" wo="0.007171335558" />
-    <nuclide name="Si-29" wo="0.000377356542" />
-    <nuclide name="Si-30" wo="0.0002576079" />
-    <nuclide name="Cr-50" wo="0.006190885148" />
-    <nuclide name="Cr-52" wo="0.124142524198" />
-    <nuclide name="Cr-53" wo="0.014348496148" />
-    <nuclide name="Cr-54" wo="0.003638294506" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top nozzle region -->
-  <material id="10">
-    <density value="1.746" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0358870" />
-    <nuclide name="O-16"  wo="0.2847761" />
-    <nuclide name="B-10"  wo="1.15699e-4" />
-    <nuclide name="B-11"  wo="5.27075e-4" />
-    <nuclide name="Fe-54" wo="0.02644016154" />
-    <nuclide name="Fe-56" wo="0.43037146399" />
-    <nuclide name="Fe-57" wo="0.0101152584" />
-    <nuclide name="Fe-58" wo="0.00137211607" />
-    <nuclide name="Ni-58" wo="0.04104621835" />
-    <nuclide name="Ni-60" wo="0.0163554502" />
-    <nuclide name="Ni-61" wo="0.000722605975" />
-    <nuclide name="Ni-62" wo="0.002342513875" />
-    <nuclide name="Ni-64" wo="0.0006157116" />
-    <nuclide name="Mn-55" wo="0.0135739" />
-    <nuclide name="Si-28" wo="0.006234853554" />
-    <nuclide name="Si-29" wo="0.000328078746" />
-    <nuclide name="Si-30" wo="0.0002239677" />
-    <nuclide name="Cr-50" wo="0.005382452306" />
-    <nuclide name="Cr-52" wo="0.107931450781" />
-    <nuclide name="Cr-53" wo="0.012474806806" />
-    <nuclide name="Cr-54" wo="0.003163190107" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top of Fuel Assemblies -->
-  <material id="11">
-    <density value="3.044" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0162913" />
-    <nuclide name="O-16"  wo="0.1292776" />
-    <nuclide name="B-10"  wo="5.25228e-5" />
-    <nuclide name="B-11"  wo="2.39272e-4" />
-    <nuclide name="Zr-90" wo="0.43313403903" />
-    <nuclide name="Zr-91" wo="0.09549277374" />
-    <nuclide name="Zr-92" wo="0.14759527104" />
-    <nuclide name="Zr-94" wo="0.15280552077" />
-    <nuclide name="Zr-96" wo="0.02511169542" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom of Fuel Assemblies -->
-  <material id="12">
-    <density value="1.762" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0292856" />
-    <nuclide name="O-16"  wo="0.2323919" />
-    <nuclide name="B-10"  wo="9.44159e-5" />
-    <nuclide name="B-11"  wo="4.30120e-4" />
-    <nuclide name="Zr-90" wo="0.3741373658" />
-    <nuclide name="Zr-91" wo="0.0824858164" />
-    <nuclide name="Zr-92" wo="0.1274914944" />
-    <nuclide name="Zr-94" wo="0.1319920622" />
-    <nuclide name="Zr-96" wo="0.0216912612" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-</materials>
diff --git a/tests/test_score_nuscatter_pn/results_true.dat b/tests/test_score_nuscatter_pn/results_true.dat
index 41bc17f8b8..603c13e701 100644
--- a/tests/test_score_nuscatter_pn/results_true.dat
+++ b/tests/test_score_nuscatter_pn/results_true.dat
@@ -1,24 +1,24 @@
 k-combined:
-9.870214E-01 2.095925E-02
+1.034954E+00 1.782721E-02
 tally 1:
-3.353000E+01
-1.133379E+02
-3.491100E+00
-1.265776E+00
-1.948509E+00
-4.761101E-01
-9.177045E-01
-1.251750E-01
-5.654249E-01
-5.567043E-02
+2.514000E+01
+6.511880E+01
+2.724740E+00
+8.378120E-01
+1.521255E+00
+2.667071E-01
+7.903706E-01
+1.216244E-01
+5.770120E-01
+5.508594E-02
 tally 2:
-3.353000E+01
-1.133379E+02
-3.491100E+00
-1.265776E+00
-1.948509E+00
-4.761101E-01
-9.177045E-01
-1.251750E-01
-5.654249E-01
-5.567043E-02
+2.514000E+01
+6.511880E+01
+2.724740E+00
+8.378120E-01
+1.521255E+00
+2.667071E-01
+7.903706E-01
+1.216244E-01
+5.770120E-01
+5.508594E-02
diff --git a/tests/test_score_nuscatter_pn/settings.xml b/tests/test_score_nuscatter_pn/settings.xml
deleted file mode 100644
index ce632aae31..0000000000
--- a/tests/test_score_nuscatter_pn/settings.xml
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0"?>
-<settings>
-
-  <eigenvalue>
-    <batches>10</batches>
-    <inactive>0</inactive>
-    <particles>100</particles>
-  </eigenvalue>
-
-  <source>
-    <space type="box">
-      <parameters>
-        -160 -160 -183
-         160  160  183
-      </parameters>
-    </space>
-  </source>
-
-</settings>
diff --git a/tests/test_score_nuscatter_pn/tallies.xml b/tests/test_score_nuscatter_pn/tallies.xml
deleted file mode 100644
index dfad48dda2..0000000000
--- a/tests/test_score_nuscatter_pn/tallies.xml
+++ /dev/null
@@ -1,14 +0,0 @@
-<?xml version="1.0"?>
-<tallies>
-
-  <tally id="1">
-    <filter type="cell" bins="21" />
-    <scores>nu-scatter-0 nu-scatter-1 nu-scatter-2 nu-scatter-3 nu-scatter-4</scores>
-  </tally>
-
-  <tally id="2">
-    <filter type="cell" bins="21" />
-    <scores>nu-scatter-p4</scores>
-  </tally>
-
-</tallies>
diff --git a/tests/test_score_nuscatter_pn/test_score_nuscatter_pn.py b/tests/test_score_nuscatter_pn/test_score_nuscatter_pn.py
index 1777db993e..6a69fe054d 100644
--- a/tests/test_score_nuscatter_pn/test_score_nuscatter_pn.py
+++ b/tests/test_score_nuscatter_pn/test_score_nuscatter_pn.py
@@ -1,10 +1,42 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
-from testing_harness import TestHarness
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness, PyAPITestHarness
+import openmc
+
+
+class ScoreNuScatterPNTestHarness(PyAPITestHarness):
+    def _build_inputs(self):
+        filt = openmc.Filter(type='cell', bins=(21, ))
+        t1 = openmc.Tally(tally_id=1)
+        t1.add_filter(filt)
+        t1.add_score('nu-scatter-0')
+        t1.add_score('nu-scatter-1')
+        t1.add_score('nu-scatter-2')
+        t1.add_score('nu-scatter-3')
+        t1.add_score('nu-scatter-4')
+        t2 = openmc.Tally(tally_id=2)
+        t2.add_filter(filt)
+        t2.add_score('nu-scatter-p4')
+        self._input_set.tallies = openmc.TalliesFile()
+        self._input_set.tallies.add_tally(t1)
+        self._input_set.tallies.add_tally(t2)
+
+        self._input_set.build_default_materials_and_geometry()
+        self._input_set.build_default_settings()
+
+        self._input_set.settings.inactive = 0
+
+        self._input_set.export()
+
+    def _cleanup(self):
+        super(ScoreNuScatterPNTestHarness, self)._cleanup()
+        f = os.path.join(os.getcwd(), 'tallies.xml')
+        if os.path.exists(f): os.remove(f)
 
 
 if __name__ == '__main__':
-    harness = TestHarness('statepoint.10.*', True)
+    harness = ScoreNuScatterPNTestHarness('statepoint.10.*', True)
     harness.main()
diff --git a/tests/test_score_nuscatter_yn/geometry.xml b/tests/test_score_nuscatter_yn/geometry.xml
deleted file mode 100644
index f6f067aadd..0000000000
--- a/tests/test_score_nuscatter_yn/geometry.xml
+++ /dev/null
@@ -1,181 +0,0 @@
-<?xml version="1.0"?>
-<geometry>
-
-  <surface id="1" type="z-cylinder" coeffs="0. 0. 0.41" />
-  <surface id="2" type="z-cylinder" coeffs="0. 0. 0.475" />
-  <surface id="3" type="z-cylinder" coeffs="0. 0. 0.56" />
-  <surface id="4" type="z-cylinder" coeffs="0. 0. 0.62" />
-  <surface id="5" type="z-cylinder" coeffs="0. 0. 187.6" />
-  <surface id="6" type="z-cylinder" coeffs="0. 0. 209.0" />
-  <surface id="7" type="z-cylinder" coeffs="0. 0. 229.0" />
-  <surface id="8" type="z-cylinder" coeffs="0. 0. 249.0" boundary="vacuum" />
-
-  <surface id="31" type="z-plane" coeffs="-229.0" boundary="vacuum" />
-  <surface id="32" type="z-plane" coeffs="-199.0" />
-  <surface id="33" type="z-plane" coeffs="-193.0" />
-  <surface id="34" type="z-plane" coeffs="-183.0" />
-  <surface id="35" type="z-plane" coeffs="0.0" />
-  <surface id="36" type="z-plane" coeffs="183.0" />
-  <surface id="37" type="z-plane" coeffs="203.0" />
-  <surface id="38" type="z-plane" coeffs="215.0" />
-  <surface id="39" type="z-plane" coeffs="223.0" boundary="vacuum" />
-
-  <!-- All geometry on base universe -->
-  <cell id="1"  fill="200"    region="  -6 34 -35" /> <!-- Lower core -->
-  <cell id="2"  fill="201"    region="  -6 35 -36" /> <!-- Upper core -->
-  <cell id="3"  material="8"  region="  -7 31 -32" /> <!-- Lower core plate region -->
-  <cell id="4"  material="9"  region="  -5 32 -33" /> <!-- Bottom nozzle region -->
-  <cell id="5"  material="12" region="  -5 33 -34" /> <!-- Bottom FA region -->
-  <cell id="6"  material="11" region="  -5 36 -37" /> <!-- Top FA region -->
-  <cell id="7"  material="10" region="  -5 37 -38" /> <!-- Top nozzle region -->
-  <cell id="8"  material="7"  region="  -7 38 -39" /> <!-- Upper plate region -->
-  <cell id="9"  material="4"  region="6 -7 32 -38" /> <!-- Downcomer -->
-  <cell id="10" material="5"  region="7 -8 31 -39" /> <!-- RPV -->
-  <cell id="11" material="6"  region="5 -6 32 -34" /> <!-- Bottom of radial reflector -->
-  <cell id="12" material="7"  region="5 -6 36 -38" /> <!-- Top of radial reflector -->
-
-  <!-- Fuel pin, cladding, cold water -->
-  <cell id="21" universe="1" material="1" region="-1"   />
-  <cell id="22" universe="1" material="2" region="1 -2" />
-  <cell id="23" universe="1" material="3" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="24" universe="2" material="3" region="-3"   />
-  <cell id="25" universe="2" material="2" region="3 -4" />
-  <cell id="26" universe="2" material="3" region="4"    />
-
-  <!-- Fuel pin, cladding, hot water -->
-  <cell id="27" universe="3" material="1" region="-1"   />
-  <cell id="28" universe="3" material="2" region="1 -2" />
-  <cell id="29" universe="3" material="4" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="30" universe="4" material="4" region="-3"   />
-  <cell id="31" universe="4" material="2" region="3 -4" />
-  <cell id="32" universe="4" material="4" region="4"    />
-
-  <!-- cell for water assembly (cold) -->
-  <cell id="50" universe="5" material="4" region="34 -35" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="60" universe="6" fill="100"   region="34 -35" />
-
-  <!-- cell for water assembly (hot) -->
-  <cell id="70" universe="7" material="3" region="35 -36" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="80" universe="8" fill="101"   region="35 -36" />
-
-  <!-- Fuel Assembly (Lower Half) -->
-  <lattice id="100">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-    </universes>
-  </lattice>
-
-  <!-- Fuel Assembly (Upper Half) -->
-  <lattice id="101">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Lower Half) -->
-  <lattice id="200">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Upper Half) -->
-  <lattice id="201">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-    </universes>
-  </lattice>
-
-</geometry>
diff --git a/tests/test_score_nuscatter_yn/inputs_true.dat b/tests/test_score_nuscatter_yn/inputs_true.dat
new file mode 100644
index 0000000000..9a8a934b17
--- /dev/null
+++ b/tests/test_score_nuscatter_yn/inputs_true.dat
@@ -0,0 +1 @@
+fd7b5b66e5d5e705da488651445d75240b05dcc1d243b2d2e8b8a729c8220221cdfa1eccfeca30897a006caaceae3e8c7449392b5027b290cb388b33e86ff2a3
\ No newline at end of file
diff --git a/tests/test_score_nuscatter_yn/materials.xml b/tests/test_score_nuscatter_yn/materials.xml
deleted file mode 100644
index 9c0b74f3f1..0000000000
--- a/tests/test_score_nuscatter_yn/materials.xml
+++ /dev/null
@@ -1,272 +0,0 @@
-<?xml version="1.0"?>
-<materials>
-
-  <default_xs>71c</default_xs>
-
-  <!-- Fuel composition -->
-  <material id="1">
-    <density value="10.062" units="g/cm3" />
-    <nuclide name="U-234"   ao="4.9476e-6" />
-    <nuclide name="U-235"   ao="4.8218e-4" />
-    <nuclide name="U-236"   ao="9.0402e-5" />
-    <nuclide name="U-238"   ao="2.1504e-2" />
-    <nuclide name="Np-237"  ao="7.3733e-6" />
-    <nuclide name="Pu-238"  ao="1.5148e-6" />
-    <nuclide name="Pu-239"  ao="1.3955e-4" />
-    <nuclide name="Pu-240"  ao="3.4405e-5" />
-    <nuclide name="Pu-241"  ao="2.1439e-5" />
-    <nuclide name="Pu-242"  ao="3.7422e-6" />
-    <nuclide name="Am-241"  ao="4.5041e-7" />
-    <nuclide name="Am-242m" ao="9.2301e-9" />
-    <nuclide name="Am-243"  ao="4.7878e-7" />
-    <nuclide name="Cm-242"  ao="1.0485e-7" />
-    <nuclide name="Cm-243"  ao="1.4268e-9" />
-    <nuclide name="Cm-244"  ao="8.8756e-8" />
-    <nuclide name="Cm-245"  ao="3.5285e-9" />
-    <nuclide name="Mo-95"   ao="2.6497e-5" />
-    <nuclide name="Tc-99"   ao="3.2772e-5" />
-    <nuclide name="Ru-101"  ao="3.0742e-5" />
-    <nuclide name="Ru-103"  ao="2.3505e-6" />
-    <nuclide name="Ag-109"  ao="2.0009e-6" />
-    <nuclide name="Xe-135"  ao="1.0801e-8" />
-    <nuclide name="Cs-133"  ao="3.4612e-5" />
-    <nuclide name="Nd-143"  ao="2.6078e-5" />
-    <nuclide name="Nd-145"  ao="1.9898e-5" />
-    <nuclide name="Sm-147"  ao="1.6128e-6" />
-    <nuclide name="Sm-149"  ao="1.1627e-7" />
-    <nuclide name="Sm-150"  ao="7.1727e-6" />
-    <nuclide name="Sm-151"  ao="5.4947e-7" />
-    <nuclide name="Sm-152"  ao="3.0221e-6" />
-    <nuclide name="Eu-153"  ao="2.6209e-6" />
-    <nuclide name="Gd-155"  ao="1.5369e-9" />
-    <nuclide name="O-16"    ao="4.5737e-2" />
-  </material>
-
-  <!-- Cladding composition -->
-  <material id="2">
-    <density value="5.77" units="g/cm3" />
-    <nuclide name="Zr-90" ao="0.5145" />
-    <nuclide name="Zr-91" ao="0.1122" />
-    <nuclide name="Zr-92" ao="0.1715" />
-    <nuclide name="Zr-94" ao="0.1738" />
-    <nuclide name="Zr-96" ao="0.0280" />
-  </material>
-
-  <!-- Cold borated water -->
-  <material id="3">
-    <density value="0.07416" units="atom/b-cm" />
-    <nuclide name="H-1" ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Hot borated water -->
-  <material id="4">
-    <density value="0.06614" units="atom/b-cm" />
-    <nuclide name="H-1"  ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- RPV Composition -->
-  <material id="5">
-    <density value="7.9" units="g/cm3" />
-    <nuclide name="Fe-54"  wo="0.05437098" />
-    <nuclide name="Fe-56"  wo="0.88500663" />
-    <nuclide name="Fe-57"  wo="0.0208008" />
-    <nuclide name="Fe-58"  wo="0.00282159" />
-    <nuclide name="Ni-58"  wo="0.0067198" />
-    <nuclide name="Ni-60"  wo="0.0026776" />
-    <nuclide name="Ni-61"  wo="0.0001183" />
-    <nuclide name="Ni-62"  wo="0.0003835" />
-    <nuclide name="Ni-64"  wo="0.0001008" />
-    <nuclide name="Mn-55"  wo="0.01" />
-    <nuclide name="Mo-92"  wo="0.000849" />
-    <nuclide name="Mo-94"  wo="0.0005418" />
-    <nuclide name="Mo-95"  wo="0.0009438" />
-    <nuclide name="Mo-96"  wo="0.0010002" />
-    <nuclide name="Mo-97"  wo="0.0005796" />
-    <nuclide name="Mo-98"  wo="0.0014814" />
-    <nuclide name="Mo-100" wo="0.0006042" />
-    <nuclide name="Si-28"  wo="0.00367464" />
-    <nuclide name="Si-29"  wo="0.00019336" />
-    <nuclide name="Si-30"  wo="0.000132" />
-    <nuclide name="Cr-50"  wo="0.00010435" />
-    <nuclide name="Cr-52"  wo="0.002092475" />
-    <nuclide name="Cr-53"  wo="0.00024185" />
-    <nuclide name="Cr-54"  wo="6.1325e-05" />
-    <nuclide name="C-Nat"  wo="0.0025" />
-    <nuclide name="Cu-63"  wo="0.0013696" />
-    <nuclide name="Cu-65"  wo="0.0006304" />
-  </material>
-
-  <!-- Lower radial reflector -->
-  <material id="6">
-    <density value="4.32" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0095661" />
-    <nuclide name="O-16"  wo="0.0759107" />
-    <nuclide name="B-10"  wo="3.08409e-5" />
-    <nuclide name="B-11"  wo="1.40499e-4" />
-    <nuclide name="Fe-54" wo="0.035620772088" />
-    <nuclide name="Fe-56" wo="0.579805982228" />
-    <nuclide name="Fe-57" wo="0.01362750048" />
-    <nuclide name="Fe-58" wo="0.001848545204" />
-    <nuclide name="Ni-58" wo="0.055298376566" />
-    <nuclide name="Ni-60" wo="0.022034425592" />
-    <nuclide name="Ni-61" wo="0.000973510811" />
-    <nuclide name="Ni-62" wo="0.003155886695" />
-    <nuclide name="Ni-64" wo="0.000829500336" />
-    <nuclide name="Mn-55" wo="0.0182870" />
-    <nuclide name="Si-28" wo="0.00839976771" />
-    <nuclide name="Si-29" wo="0.00044199679" />
-    <nuclide name="Si-30" wo="0.0003017355" />
-    <nuclide name="Cr-50" wo="0.007251360806" />
-    <nuclide name="Cr-52" wo="0.145407678031" />
-    <nuclide name="Cr-53" wo="0.016806340306" />
-    <nuclide name="Cr-54" wo="0.004261520857" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Upper radial reflector / Top plate region -->
-  <material id="7">
-    <density value="4.28" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0086117" />
-    <nuclide name="O-16"  wo="0.0683369" />
-    <nuclide name="B-10"  wo="2.77638e-5" />
-    <nuclide name="B-11"  wo="1.26481e-4" />
-    <nuclide name="Fe-54" wo="0.035953677186" />
-    <nuclide name="Fe-56" wo="0.585224740891" />
-    <nuclide name="Fe-57" wo="0.01375486056" />
-    <nuclide name="Fe-58" wo="0.001865821363" />
-    <nuclide name="Ni-58" wo="0.055815129186" />
-    <nuclide name="Ni-60" wo="0.022240333032" />
-    <nuclide name="Ni-61" wo="0.000982608081" />
-    <nuclide name="Ni-62" wo="0.003185377845" />
-    <nuclide name="Ni-64" wo="0.000837251856" />
-    <nuclide name="Mn-55" wo="0.0184579" />
-    <nuclide name="Si-28" wo="0.00847831314" />
-    <nuclide name="Si-29" wo="0.00044612986" />
-    <nuclide name="Si-30" wo="0.000304557" />
-    <nuclide name="Cr-50" wo="0.00731912987" />
-    <nuclide name="Cr-52" wo="0.146766614995" />
-    <nuclide name="Cr-53" wo="0.01696340737" />
-    <nuclide name="Cr-54" wo="0.004301347765" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom plate region -->
-  <material id="8">
-    <density value="7.184" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0011505" />
-    <nuclide name="O-16"  wo="0.0091296" />
-    <nuclide name="B-10"  wo="3.70915e-6" />
-    <nuclide name="B-11"  wo="1.68974e-5" />
-    <nuclide name="Fe-54" wo="0.03855611055" />
-    <nuclide name="Fe-56" wo="0.627585036425" />
-    <nuclide name="Fe-57" wo="0.014750478" />
-    <nuclide name="Fe-58" wo="0.002000875025" />
-    <nuclide name="Ni-58" wo="0.059855207342" />
-    <nuclide name="Ni-60" wo="0.023850159704" />
-    <nuclide name="Ni-61" wo="0.001053732407" />
-    <nuclide name="Ni-62" wo="0.003415945715" />
-    <nuclide name="Ni-64" wo="0.000897854832" />
-    <nuclide name="Mn-55" wo="0.0197940" />
-    <nuclide name="Si-28" wo="0.00909197802" />
-    <nuclide name="Si-29" wo="0.00047842098" />
-    <nuclide name="Si-30" wo="0.000326601" />
-    <nuclide name="Cr-50" wo="0.007848910646" />
-    <nuclide name="Cr-52" wo="0.157390026871" />
-    <nuclide name="Cr-53" wo="0.018191270146" />
-    <nuclide name="Cr-54" wo="0.004612692337" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom nozzle region -->
-  <material id="9">
-    <density value="2.53" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0245014" />
-    <nuclide name="O-16"  wo="0.1944274" />
-    <nuclide name="B-10"  wo="7.89917e-5" />
-    <nuclide name="B-11"  wo="3.59854e-4" />
-    <nuclide name="Fe-54" wo="0.030411411144" />
-    <nuclide name="Fe-56" wo="0.495012237964" />
-    <nuclide name="Fe-57" wo="0.01163454624" />
-    <nuclide name="Fe-58" wo="0.001578204652" />
-    <nuclide name="Ni-58" wo="0.047211231662" />
-    <nuclide name="Ni-60" wo="0.018811987544" />
-    <nuclide name="Ni-61" wo="0.000831139127" />
-    <nuclide name="Ni-62" wo="0.002694352115" />
-    <nuclide name="Ni-64" wo="0.000708189552" />
-    <nuclide name="Mn-55" wo="0.0156126" />
-    <nuclide name="Si-28" wo="0.007171335558" />
-    <nuclide name="Si-29" wo="0.000377356542" />
-    <nuclide name="Si-30" wo="0.0002576079" />
-    <nuclide name="Cr-50" wo="0.006190885148" />
-    <nuclide name="Cr-52" wo="0.124142524198" />
-    <nuclide name="Cr-53" wo="0.014348496148" />
-    <nuclide name="Cr-54" wo="0.003638294506" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top nozzle region -->
-  <material id="10">
-    <density value="1.746" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0358870" />
-    <nuclide name="O-16"  wo="0.2847761" />
-    <nuclide name="B-10"  wo="1.15699e-4" />
-    <nuclide name="B-11"  wo="5.27075e-4" />
-    <nuclide name="Fe-54" wo="0.02644016154" />
-    <nuclide name="Fe-56" wo="0.43037146399" />
-    <nuclide name="Fe-57" wo="0.0101152584" />
-    <nuclide name="Fe-58" wo="0.00137211607" />
-    <nuclide name="Ni-58" wo="0.04104621835" />
-    <nuclide name="Ni-60" wo="0.0163554502" />
-    <nuclide name="Ni-61" wo="0.000722605975" />
-    <nuclide name="Ni-62" wo="0.002342513875" />
-    <nuclide name="Ni-64" wo="0.0006157116" />
-    <nuclide name="Mn-55" wo="0.0135739" />
-    <nuclide name="Si-28" wo="0.006234853554" />
-    <nuclide name="Si-29" wo="0.000328078746" />
-    <nuclide name="Si-30" wo="0.0002239677" />
-    <nuclide name="Cr-50" wo="0.005382452306" />
-    <nuclide name="Cr-52" wo="0.107931450781" />
-    <nuclide name="Cr-53" wo="0.012474806806" />
-    <nuclide name="Cr-54" wo="0.003163190107" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top of Fuel Assemblies -->
-  <material id="11">
-    <density value="3.044" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0162913" />
-    <nuclide name="O-16"  wo="0.1292776" />
-    <nuclide name="B-10"  wo="5.25228e-5" />
-    <nuclide name="B-11"  wo="2.39272e-4" />
-    <nuclide name="Zr-90" wo="0.43313403903" />
-    <nuclide name="Zr-91" wo="0.09549277374" />
-    <nuclide name="Zr-92" wo="0.14759527104" />
-    <nuclide name="Zr-94" wo="0.15280552077" />
-    <nuclide name="Zr-96" wo="0.02511169542" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom of Fuel Assemblies -->
-  <material id="12">
-    <density value="1.762" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0292856" />
-    <nuclide name="O-16"  wo="0.2323919" />
-    <nuclide name="B-10"  wo="9.44159e-5" />
-    <nuclide name="B-11"  wo="4.30120e-4" />
-    <nuclide name="Zr-90" wo="0.3741373658" />
-    <nuclide name="Zr-91" wo="0.0824858164" />
-    <nuclide name="Zr-92" wo="0.1274914944" />
-    <nuclide name="Zr-94" wo="0.1319920622" />
-    <nuclide name="Zr-96" wo="0.0216912612" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-</materials>
diff --git a/tests/test_score_nuscatter_yn/results_true.dat b/tests/test_score_nuscatter_yn/results_true.dat
index cdf051ee75..79c89b7708 100644
--- a/tests/test_score_nuscatter_yn/results_true.dat
+++ b/tests/test_score_nuscatter_yn/results_true.dat
@@ -1,38 +1,38 @@
 k-combined:
-9.870214E-01 2.095925E-02
+1.034954E+00 1.782721E-02
 tally 1:
-3.353000E+01
-1.133379E+02
+2.514000E+01
+6.511880E+01
 tally 2:
-3.353000E+01
-1.133379E+02
-4.293226E-01
-6.259462E-02
--2.011041E-02
-5.388144E-02
-3.900136E-01
-5.873137E-02
-6.150213E-02
-9.043796E-03
-5.518583E-02
-1.739087E-02
--2.047987E-01
-1.993679E-02
-6.710345E-02
-1.652573E-02
--3.619254E-02
-1.598186E-02
-3.551558E-02
-9.077346E-03
-1.044669E-01
-2.082961E-03
--3.782063E-02
-1.681459E-02
-1.752386E-01
-1.411429E-02
--3.289649E-02
-9.534958E-03
-5.252770E-02
-7.518445E-03
-2.688056E-02
-3.397824E-03
+2.514000E+01
+6.511880E+01
+-2.222467E-01
+2.881247E-02
+3.019176E-01
+3.014833E-02
+8.459006E-04
+4.773570E-02
+9.596964E-02
+1.009754E-02
+-4.314855E-02
+6.207871E-03
+4.607677E-02
+9.205573E-03
+-2.345994E-03
+1.243004E-02
+9.577397E-02
+6.605519E-03
+-2.821584E-02
+3.834286E-03
+-1.077389E-01
+6.570217E-03
+-1.106443E-01
+1.006436E-02
+1.322104E-01
+7.721677E-03
+1.315548E-02
+5.488918E-04
+-2.792171E-02
+5.816161E-03
+-1.994370E-02
+1.169674E-03
diff --git a/tests/test_score_nuscatter_yn/settings.xml b/tests/test_score_nuscatter_yn/settings.xml
deleted file mode 100644
index ce632aae31..0000000000
--- a/tests/test_score_nuscatter_yn/settings.xml
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0"?>
-<settings>
-
-  <eigenvalue>
-    <batches>10</batches>
-    <inactive>0</inactive>
-    <particles>100</particles>
-  </eigenvalue>
-
-  <source>
-    <space type="box">
-      <parameters>
-        -160 -160 -183
-         160  160  183
-      </parameters>
-    </space>
-  </source>
-
-</settings>
diff --git a/tests/test_score_nuscatter_yn/tallies.xml b/tests/test_score_nuscatter_yn/tallies.xml
deleted file mode 100644
index b80b37dc8c..0000000000
--- a/tests/test_score_nuscatter_yn/tallies.xml
+++ /dev/null
@@ -1,14 +0,0 @@
-<?xml version="1.0"?>
-<tallies>
-
-  <tally id="1">
-    <filter type="cell" bins="21" />
-    <scores>nu-scatter-0</scores>
-  </tally>
-
-  <tally id="2">
-    <filter type="cell" bins="21" />
-    <scores>nu-scatter-y3</scores>
-  </tally>
-
-</tallies>
diff --git a/tests/test_score_nuscatter_yn/test_score_nuscatter_yn.py b/tests/test_score_nuscatter_yn/test_score_nuscatter_yn.py
index 1777db993e..6a6ad54956 100644
--- a/tests/test_score_nuscatter_yn/test_score_nuscatter_yn.py
+++ b/tests/test_score_nuscatter_yn/test_score_nuscatter_yn.py
@@ -1,10 +1,38 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
-from testing_harness import TestHarness
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness, PyAPITestHarness
+import openmc
+
+
+class ScoreNuScatterYNTestHarness(PyAPITestHarness):
+    def _build_inputs(self):
+        filt = openmc.Filter(type='cell', bins=(21, ))
+        t1 = openmc.Tally(tally_id=1)
+        t1.add_filter(filt)
+        t1.add_score('nu-scatter-0')
+        t2 = openmc.Tally(tally_id=2)
+        t2.add_filter(filt)
+        t2.add_score('nu-scatter-y3')
+        self._input_set.tallies = openmc.TalliesFile()
+        self._input_set.tallies.add_tally(t1)
+        self._input_set.tallies.add_tally(t2)
+
+        self._input_set.build_default_materials_and_geometry()
+        self._input_set.build_default_settings()
+
+        self._input_set.settings.inactive = 0
+
+        self._input_set.export()
+
+    def _cleanup(self):
+        super(ScoreNuScatterYNTestHarness, self)._cleanup()
+        f = os.path.join(os.getcwd(), 'tallies.xml')
+        if os.path.exists(f): os.remove(f)
 
 
 if __name__ == '__main__':
-    harness = TestHarness('statepoint.10.*', True)
+    harness = ScoreNuScatterYNTestHarness('statepoint.10.*', True)
     harness.main()
diff --git a/tests/test_score_scatter/geometry.xml b/tests/test_score_scatter/geometry.xml
deleted file mode 100644
index f6f067aadd..0000000000
--- a/tests/test_score_scatter/geometry.xml
+++ /dev/null
@@ -1,181 +0,0 @@
-<?xml version="1.0"?>
-<geometry>
-
-  <surface id="1" type="z-cylinder" coeffs="0. 0. 0.41" />
-  <surface id="2" type="z-cylinder" coeffs="0. 0. 0.475" />
-  <surface id="3" type="z-cylinder" coeffs="0. 0. 0.56" />
-  <surface id="4" type="z-cylinder" coeffs="0. 0. 0.62" />
-  <surface id="5" type="z-cylinder" coeffs="0. 0. 187.6" />
-  <surface id="6" type="z-cylinder" coeffs="0. 0. 209.0" />
-  <surface id="7" type="z-cylinder" coeffs="0. 0. 229.0" />
-  <surface id="8" type="z-cylinder" coeffs="0. 0. 249.0" boundary="vacuum" />
-
-  <surface id="31" type="z-plane" coeffs="-229.0" boundary="vacuum" />
-  <surface id="32" type="z-plane" coeffs="-199.0" />
-  <surface id="33" type="z-plane" coeffs="-193.0" />
-  <surface id="34" type="z-plane" coeffs="-183.0" />
-  <surface id="35" type="z-plane" coeffs="0.0" />
-  <surface id="36" type="z-plane" coeffs="183.0" />
-  <surface id="37" type="z-plane" coeffs="203.0" />
-  <surface id="38" type="z-plane" coeffs="215.0" />
-  <surface id="39" type="z-plane" coeffs="223.0" boundary="vacuum" />
-
-  <!-- All geometry on base universe -->
-  <cell id="1"  fill="200"    region="  -6 34 -35" /> <!-- Lower core -->
-  <cell id="2"  fill="201"    region="  -6 35 -36" /> <!-- Upper core -->
-  <cell id="3"  material="8"  region="  -7 31 -32" /> <!-- Lower core plate region -->
-  <cell id="4"  material="9"  region="  -5 32 -33" /> <!-- Bottom nozzle region -->
-  <cell id="5"  material="12" region="  -5 33 -34" /> <!-- Bottom FA region -->
-  <cell id="6"  material="11" region="  -5 36 -37" /> <!-- Top FA region -->
-  <cell id="7"  material="10" region="  -5 37 -38" /> <!-- Top nozzle region -->
-  <cell id="8"  material="7"  region="  -7 38 -39" /> <!-- Upper plate region -->
-  <cell id="9"  material="4"  region="6 -7 32 -38" /> <!-- Downcomer -->
-  <cell id="10" material="5"  region="7 -8 31 -39" /> <!-- RPV -->
-  <cell id="11" material="6"  region="5 -6 32 -34" /> <!-- Bottom of radial reflector -->
-  <cell id="12" material="7"  region="5 -6 36 -38" /> <!-- Top of radial reflector -->
-
-  <!-- Fuel pin, cladding, cold water -->
-  <cell id="21" universe="1" material="1" region="-1"   />
-  <cell id="22" universe="1" material="2" region="1 -2" />
-  <cell id="23" universe="1" material="3" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="24" universe="2" material="3" region="-3"   />
-  <cell id="25" universe="2" material="2" region="3 -4" />
-  <cell id="26" universe="2" material="3" region="4"    />
-
-  <!-- Fuel pin, cladding, hot water -->
-  <cell id="27" universe="3" material="1" region="-1"   />
-  <cell id="28" universe="3" material="2" region="1 -2" />
-  <cell id="29" universe="3" material="4" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="30" universe="4" material="4" region="-3"   />
-  <cell id="31" universe="4" material="2" region="3 -4" />
-  <cell id="32" universe="4" material="4" region="4"    />
-
-  <!-- cell for water assembly (cold) -->
-  <cell id="50" universe="5" material="4" region="34 -35" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="60" universe="6" fill="100"   region="34 -35" />
-
-  <!-- cell for water assembly (hot) -->
-  <cell id="70" universe="7" material="3" region="35 -36" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="80" universe="8" fill="101"   region="35 -36" />
-
-  <!-- Fuel Assembly (Lower Half) -->
-  <lattice id="100">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-    </universes>
-  </lattice>
-
-  <!-- Fuel Assembly (Upper Half) -->
-  <lattice id="101">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Lower Half) -->
-  <lattice id="200">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Upper Half) -->
-  <lattice id="201">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-    </universes>
-  </lattice>
-
-</geometry>
diff --git a/tests/test_score_scatter/inputs_true.dat b/tests/test_score_scatter/inputs_true.dat
new file mode 100644
index 0000000000..d7a6f4719a
--- /dev/null
+++ b/tests/test_score_scatter/inputs_true.dat
@@ -0,0 +1 @@
+8b5e7c3825ef033d12c0574595b16559981ed3dd0ced8609c461cd0e81f1f2ef28195e0a6f6886fcbae64185dfe96001fa12d3d472f6446a3135d3bd6ef83394
\ No newline at end of file
diff --git a/tests/test_score_scatter/materials.xml b/tests/test_score_scatter/materials.xml
deleted file mode 100644
index 9c0b74f3f1..0000000000
--- a/tests/test_score_scatter/materials.xml
+++ /dev/null
@@ -1,272 +0,0 @@
-<?xml version="1.0"?>
-<materials>
-
-  <default_xs>71c</default_xs>
-
-  <!-- Fuel composition -->
-  <material id="1">
-    <density value="10.062" units="g/cm3" />
-    <nuclide name="U-234"   ao="4.9476e-6" />
-    <nuclide name="U-235"   ao="4.8218e-4" />
-    <nuclide name="U-236"   ao="9.0402e-5" />
-    <nuclide name="U-238"   ao="2.1504e-2" />
-    <nuclide name="Np-237"  ao="7.3733e-6" />
-    <nuclide name="Pu-238"  ao="1.5148e-6" />
-    <nuclide name="Pu-239"  ao="1.3955e-4" />
-    <nuclide name="Pu-240"  ao="3.4405e-5" />
-    <nuclide name="Pu-241"  ao="2.1439e-5" />
-    <nuclide name="Pu-242"  ao="3.7422e-6" />
-    <nuclide name="Am-241"  ao="4.5041e-7" />
-    <nuclide name="Am-242m" ao="9.2301e-9" />
-    <nuclide name="Am-243"  ao="4.7878e-7" />
-    <nuclide name="Cm-242"  ao="1.0485e-7" />
-    <nuclide name="Cm-243"  ao="1.4268e-9" />
-    <nuclide name="Cm-244"  ao="8.8756e-8" />
-    <nuclide name="Cm-245"  ao="3.5285e-9" />
-    <nuclide name="Mo-95"   ao="2.6497e-5" />
-    <nuclide name="Tc-99"   ao="3.2772e-5" />
-    <nuclide name="Ru-101"  ao="3.0742e-5" />
-    <nuclide name="Ru-103"  ao="2.3505e-6" />
-    <nuclide name="Ag-109"  ao="2.0009e-6" />
-    <nuclide name="Xe-135"  ao="1.0801e-8" />
-    <nuclide name="Cs-133"  ao="3.4612e-5" />
-    <nuclide name="Nd-143"  ao="2.6078e-5" />
-    <nuclide name="Nd-145"  ao="1.9898e-5" />
-    <nuclide name="Sm-147"  ao="1.6128e-6" />
-    <nuclide name="Sm-149"  ao="1.1627e-7" />
-    <nuclide name="Sm-150"  ao="7.1727e-6" />
-    <nuclide name="Sm-151"  ao="5.4947e-7" />
-    <nuclide name="Sm-152"  ao="3.0221e-6" />
-    <nuclide name="Eu-153"  ao="2.6209e-6" />
-    <nuclide name="Gd-155"  ao="1.5369e-9" />
-    <nuclide name="O-16"    ao="4.5737e-2" />
-  </material>
-
-  <!-- Cladding composition -->
-  <material id="2">
-    <density value="5.77" units="g/cm3" />
-    <nuclide name="Zr-90" ao="0.5145" />
-    <nuclide name="Zr-91" ao="0.1122" />
-    <nuclide name="Zr-92" ao="0.1715" />
-    <nuclide name="Zr-94" ao="0.1738" />
-    <nuclide name="Zr-96" ao="0.0280" />
-  </material>
-
-  <!-- Cold borated water -->
-  <material id="3">
-    <density value="0.07416" units="atom/b-cm" />
-    <nuclide name="H-1" ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Hot borated water -->
-  <material id="4">
-    <density value="0.06614" units="atom/b-cm" />
-    <nuclide name="H-1"  ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- RPV Composition -->
-  <material id="5">
-    <density value="7.9" units="g/cm3" />
-    <nuclide name="Fe-54"  wo="0.05437098" />
-    <nuclide name="Fe-56"  wo="0.88500663" />
-    <nuclide name="Fe-57"  wo="0.0208008" />
-    <nuclide name="Fe-58"  wo="0.00282159" />
-    <nuclide name="Ni-58"  wo="0.0067198" />
-    <nuclide name="Ni-60"  wo="0.0026776" />
-    <nuclide name="Ni-61"  wo="0.0001183" />
-    <nuclide name="Ni-62"  wo="0.0003835" />
-    <nuclide name="Ni-64"  wo="0.0001008" />
-    <nuclide name="Mn-55"  wo="0.01" />
-    <nuclide name="Mo-92"  wo="0.000849" />
-    <nuclide name="Mo-94"  wo="0.0005418" />
-    <nuclide name="Mo-95"  wo="0.0009438" />
-    <nuclide name="Mo-96"  wo="0.0010002" />
-    <nuclide name="Mo-97"  wo="0.0005796" />
-    <nuclide name="Mo-98"  wo="0.0014814" />
-    <nuclide name="Mo-100" wo="0.0006042" />
-    <nuclide name="Si-28"  wo="0.00367464" />
-    <nuclide name="Si-29"  wo="0.00019336" />
-    <nuclide name="Si-30"  wo="0.000132" />
-    <nuclide name="Cr-50"  wo="0.00010435" />
-    <nuclide name="Cr-52"  wo="0.002092475" />
-    <nuclide name="Cr-53"  wo="0.00024185" />
-    <nuclide name="Cr-54"  wo="6.1325e-05" />
-    <nuclide name="C-Nat"  wo="0.0025" />
-    <nuclide name="Cu-63"  wo="0.0013696" />
-    <nuclide name="Cu-65"  wo="0.0006304" />
-  </material>
-
-  <!-- Lower radial reflector -->
-  <material id="6">
-    <density value="4.32" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0095661" />
-    <nuclide name="O-16"  wo="0.0759107" />
-    <nuclide name="B-10"  wo="3.08409e-5" />
-    <nuclide name="B-11"  wo="1.40499e-4" />
-    <nuclide name="Fe-54" wo="0.035620772088" />
-    <nuclide name="Fe-56" wo="0.579805982228" />
-    <nuclide name="Fe-57" wo="0.01362750048" />
-    <nuclide name="Fe-58" wo="0.001848545204" />
-    <nuclide name="Ni-58" wo="0.055298376566" />
-    <nuclide name="Ni-60" wo="0.022034425592" />
-    <nuclide name="Ni-61" wo="0.000973510811" />
-    <nuclide name="Ni-62" wo="0.003155886695" />
-    <nuclide name="Ni-64" wo="0.000829500336" />
-    <nuclide name="Mn-55" wo="0.0182870" />
-    <nuclide name="Si-28" wo="0.00839976771" />
-    <nuclide name="Si-29" wo="0.00044199679" />
-    <nuclide name="Si-30" wo="0.0003017355" />
-    <nuclide name="Cr-50" wo="0.007251360806" />
-    <nuclide name="Cr-52" wo="0.145407678031" />
-    <nuclide name="Cr-53" wo="0.016806340306" />
-    <nuclide name="Cr-54" wo="0.004261520857" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Upper radial reflector / Top plate region -->
-  <material id="7">
-    <density value="4.28" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0086117" />
-    <nuclide name="O-16"  wo="0.0683369" />
-    <nuclide name="B-10"  wo="2.77638e-5" />
-    <nuclide name="B-11"  wo="1.26481e-4" />
-    <nuclide name="Fe-54" wo="0.035953677186" />
-    <nuclide name="Fe-56" wo="0.585224740891" />
-    <nuclide name="Fe-57" wo="0.01375486056" />
-    <nuclide name="Fe-58" wo="0.001865821363" />
-    <nuclide name="Ni-58" wo="0.055815129186" />
-    <nuclide name="Ni-60" wo="0.022240333032" />
-    <nuclide name="Ni-61" wo="0.000982608081" />
-    <nuclide name="Ni-62" wo="0.003185377845" />
-    <nuclide name="Ni-64" wo="0.000837251856" />
-    <nuclide name="Mn-55" wo="0.0184579" />
-    <nuclide name="Si-28" wo="0.00847831314" />
-    <nuclide name="Si-29" wo="0.00044612986" />
-    <nuclide name="Si-30" wo="0.000304557" />
-    <nuclide name="Cr-50" wo="0.00731912987" />
-    <nuclide name="Cr-52" wo="0.146766614995" />
-    <nuclide name="Cr-53" wo="0.01696340737" />
-    <nuclide name="Cr-54" wo="0.004301347765" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom plate region -->
-  <material id="8">
-    <density value="7.184" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0011505" />
-    <nuclide name="O-16"  wo="0.0091296" />
-    <nuclide name="B-10"  wo="3.70915e-6" />
-    <nuclide name="B-11"  wo="1.68974e-5" />
-    <nuclide name="Fe-54" wo="0.03855611055" />
-    <nuclide name="Fe-56" wo="0.627585036425" />
-    <nuclide name="Fe-57" wo="0.014750478" />
-    <nuclide name="Fe-58" wo="0.002000875025" />
-    <nuclide name="Ni-58" wo="0.059855207342" />
-    <nuclide name="Ni-60" wo="0.023850159704" />
-    <nuclide name="Ni-61" wo="0.001053732407" />
-    <nuclide name="Ni-62" wo="0.003415945715" />
-    <nuclide name="Ni-64" wo="0.000897854832" />
-    <nuclide name="Mn-55" wo="0.0197940" />
-    <nuclide name="Si-28" wo="0.00909197802" />
-    <nuclide name="Si-29" wo="0.00047842098" />
-    <nuclide name="Si-30" wo="0.000326601" />
-    <nuclide name="Cr-50" wo="0.007848910646" />
-    <nuclide name="Cr-52" wo="0.157390026871" />
-    <nuclide name="Cr-53" wo="0.018191270146" />
-    <nuclide name="Cr-54" wo="0.004612692337" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom nozzle region -->
-  <material id="9">
-    <density value="2.53" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0245014" />
-    <nuclide name="O-16"  wo="0.1944274" />
-    <nuclide name="B-10"  wo="7.89917e-5" />
-    <nuclide name="B-11"  wo="3.59854e-4" />
-    <nuclide name="Fe-54" wo="0.030411411144" />
-    <nuclide name="Fe-56" wo="0.495012237964" />
-    <nuclide name="Fe-57" wo="0.01163454624" />
-    <nuclide name="Fe-58" wo="0.001578204652" />
-    <nuclide name="Ni-58" wo="0.047211231662" />
-    <nuclide name="Ni-60" wo="0.018811987544" />
-    <nuclide name="Ni-61" wo="0.000831139127" />
-    <nuclide name="Ni-62" wo="0.002694352115" />
-    <nuclide name="Ni-64" wo="0.000708189552" />
-    <nuclide name="Mn-55" wo="0.0156126" />
-    <nuclide name="Si-28" wo="0.007171335558" />
-    <nuclide name="Si-29" wo="0.000377356542" />
-    <nuclide name="Si-30" wo="0.0002576079" />
-    <nuclide name="Cr-50" wo="0.006190885148" />
-    <nuclide name="Cr-52" wo="0.124142524198" />
-    <nuclide name="Cr-53" wo="0.014348496148" />
-    <nuclide name="Cr-54" wo="0.003638294506" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top nozzle region -->
-  <material id="10">
-    <density value="1.746" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0358870" />
-    <nuclide name="O-16"  wo="0.2847761" />
-    <nuclide name="B-10"  wo="1.15699e-4" />
-    <nuclide name="B-11"  wo="5.27075e-4" />
-    <nuclide name="Fe-54" wo="0.02644016154" />
-    <nuclide name="Fe-56" wo="0.43037146399" />
-    <nuclide name="Fe-57" wo="0.0101152584" />
-    <nuclide name="Fe-58" wo="0.00137211607" />
-    <nuclide name="Ni-58" wo="0.04104621835" />
-    <nuclide name="Ni-60" wo="0.0163554502" />
-    <nuclide name="Ni-61" wo="0.000722605975" />
-    <nuclide name="Ni-62" wo="0.002342513875" />
-    <nuclide name="Ni-64" wo="0.0006157116" />
-    <nuclide name="Mn-55" wo="0.0135739" />
-    <nuclide name="Si-28" wo="0.006234853554" />
-    <nuclide name="Si-29" wo="0.000328078746" />
-    <nuclide name="Si-30" wo="0.0002239677" />
-    <nuclide name="Cr-50" wo="0.005382452306" />
-    <nuclide name="Cr-52" wo="0.107931450781" />
-    <nuclide name="Cr-53" wo="0.012474806806" />
-    <nuclide name="Cr-54" wo="0.003163190107" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top of Fuel Assemblies -->
-  <material id="11">
-    <density value="3.044" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0162913" />
-    <nuclide name="O-16"  wo="0.1292776" />
-    <nuclide name="B-10"  wo="5.25228e-5" />
-    <nuclide name="B-11"  wo="2.39272e-4" />
-    <nuclide name="Zr-90" wo="0.43313403903" />
-    <nuclide name="Zr-91" wo="0.09549277374" />
-    <nuclide name="Zr-92" wo="0.14759527104" />
-    <nuclide name="Zr-94" wo="0.15280552077" />
-    <nuclide name="Zr-96" wo="0.02511169542" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom of Fuel Assemblies -->
-  <material id="12">
-    <density value="1.762" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0292856" />
-    <nuclide name="O-16"  wo="0.2323919" />
-    <nuclide name="B-10"  wo="9.44159e-5" />
-    <nuclide name="B-11"  wo="4.30120e-4" />
-    <nuclide name="Zr-90" wo="0.3741373658" />
-    <nuclide name="Zr-91" wo="0.0824858164" />
-    <nuclide name="Zr-92" wo="0.1274914944" />
-    <nuclide name="Zr-94" wo="0.1319920622" />
-    <nuclide name="Zr-96" wo="0.0216912612" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-</materials>
diff --git a/tests/test_score_scatter/results_true.dat b/tests/test_score_scatter/results_true.dat
index 21d7d83c27..8d3e0fdc03 100644
--- a/tests/test_score_scatter/results_true.dat
+++ b/tests/test_score_scatter/results_true.dat
@@ -1,29 +1,29 @@
 k-combined:
-1.005983E+00 2.248579E-02
+9.903196E-01 4.279617E-02
 tally 1:
 0.000000E+00
 0.000000E+00
-1.223028E+01
-3.185078E+01
-2.900350E+00
-1.814004E+00
-4.059013E+01
-3.609499E+02
+1.514235E+01
+4.620490E+01
+3.839050E+00
+2.975620E+00
+5.317903E+01
+5.754103E+02
 tally 2:
 0.000000E+00
 0.000000E+00
-1.169000E+01
-2.915330E+01
-3.200000E+00
-2.342600E+00
-4.064000E+01
-3.595168E+02
+1.485000E+01
+4.439790E+01
+4.120000E+00
+3.438000E+00
+5.173000E+01
+5.467243E+02
 tally 3:
 0.000000E+00
 0.000000E+00
-1.172929E+01
-2.935812E+01
-3.185726E+00
-2.323517E+00
-4.074319E+01
-3.614902E+02
+1.496769E+01
+4.502714E+01
+4.117144E+00
+3.431861E+00
+5.174677E+01
+5.469474E+02
diff --git a/tests/test_score_scatter/settings.xml b/tests/test_score_scatter/settings.xml
deleted file mode 100644
index 517637a59f..0000000000
--- a/tests/test_score_scatter/settings.xml
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0"?>
-<settings>
-
-  <eigenvalue>
-    <batches>10</batches>
-    <inactive>5</inactive>
-    <particles>100</particles>
-  </eigenvalue>
-
-  <source>
-    <space type="box">
-      <parameters>
-        -160 -160 -183
-         160  160  183
-      </parameters>
-    </space>
-  </source>
-
-</settings>
diff --git a/tests/test_score_scatter/tallies.xml b/tests/test_score_scatter/tallies.xml
deleted file mode 100644
index b6eb73b506..0000000000
--- a/tests/test_score_scatter/tallies.xml
+++ /dev/null
@@ -1,21 +0,0 @@
-<?xml version="1.0"?>
-<tallies>
-
-  <tally id="1">
-    <filter type="cell" bins="10 21 22 23" />
-    <scores>scatter</scores>
-  </tally>
-
-  <tally id="2">
-    <filter type="cell" bins="10 21 22 23" />
-    <scores>scatter</scores>
-    <estimator>analog</estimator>
-  </tally>
-
-  <tally id="3">
-    <filter type="cell" bins="10 21 22 23" />
-    <scores>scatter</scores>
-    <estimator>collision</estimator>
-  </tally>
-
-</tallies>
diff --git a/tests/test_score_scatter/test_score_scatter.py b/tests/test_score_scatter/test_score_scatter.py
index 1777db993e..0b2621acd3 100644
--- a/tests/test_score_scatter/test_score_scatter.py
+++ b/tests/test_score_scatter/test_score_scatter.py
@@ -1,10 +1,32 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
-from testing_harness import TestHarness
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness, PyAPITestHarness
+import openmc
+
+
+class ScoreScatterTestHarness(PyAPITestHarness):
+    def _build_inputs(self):
+        filt = openmc.Filter(type='cell', bins=(10, 21, 22, 23))
+        tallies = [openmc.Tally(tally_id=i) for i in range(1, 4)]
+        [t.add_filter(filt) for t in tallies]
+        [t.add_score('scatter') for t in tallies]
+        tallies[0].estimator = 'tracklength'
+        tallies[1].estimator = 'analog'
+        tallies[2].estimator = 'collision'
+        self._input_set.tallies = openmc.TalliesFile()
+        [self._input_set.tallies.add_tally(t) for t in tallies]
+
+        super(ScoreScatterTestHarness, self)._build_inputs()
+
+    def _cleanup(self):
+        super(ScoreScatterTestHarness, self)._cleanup()
+        f = os.path.join(os.getcwd(), 'tallies.xml')
+        if os.path.exists(f): os.remove(f)
 
 
 if __name__ == '__main__':
-    harness = TestHarness('statepoint.10.*', True)
+    harness = ScoreScatterTestHarness('statepoint.10.*', True)
     harness.main()
diff --git a/tests/test_score_scatter_n/geometry.xml b/tests/test_score_scatter_n/geometry.xml
deleted file mode 100644
index f6f067aadd..0000000000
--- a/tests/test_score_scatter_n/geometry.xml
+++ /dev/null
@@ -1,181 +0,0 @@
-<?xml version="1.0"?>
-<geometry>
-
-  <surface id="1" type="z-cylinder" coeffs="0. 0. 0.41" />
-  <surface id="2" type="z-cylinder" coeffs="0. 0. 0.475" />
-  <surface id="3" type="z-cylinder" coeffs="0. 0. 0.56" />
-  <surface id="4" type="z-cylinder" coeffs="0. 0. 0.62" />
-  <surface id="5" type="z-cylinder" coeffs="0. 0. 187.6" />
-  <surface id="6" type="z-cylinder" coeffs="0. 0. 209.0" />
-  <surface id="7" type="z-cylinder" coeffs="0. 0. 229.0" />
-  <surface id="8" type="z-cylinder" coeffs="0. 0. 249.0" boundary="vacuum" />
-
-  <surface id="31" type="z-plane" coeffs="-229.0" boundary="vacuum" />
-  <surface id="32" type="z-plane" coeffs="-199.0" />
-  <surface id="33" type="z-plane" coeffs="-193.0" />
-  <surface id="34" type="z-plane" coeffs="-183.0" />
-  <surface id="35" type="z-plane" coeffs="0.0" />
-  <surface id="36" type="z-plane" coeffs="183.0" />
-  <surface id="37" type="z-plane" coeffs="203.0" />
-  <surface id="38" type="z-plane" coeffs="215.0" />
-  <surface id="39" type="z-plane" coeffs="223.0" boundary="vacuum" />
-
-  <!-- All geometry on base universe -->
-  <cell id="1"  fill="200"    region="  -6 34 -35" /> <!-- Lower core -->
-  <cell id="2"  fill="201"    region="  -6 35 -36" /> <!-- Upper core -->
-  <cell id="3"  material="8"  region="  -7 31 -32" /> <!-- Lower core plate region -->
-  <cell id="4"  material="9"  region="  -5 32 -33" /> <!-- Bottom nozzle region -->
-  <cell id="5"  material="12" region="  -5 33 -34" /> <!-- Bottom FA region -->
-  <cell id="6"  material="11" region="  -5 36 -37" /> <!-- Top FA region -->
-  <cell id="7"  material="10" region="  -5 37 -38" /> <!-- Top nozzle region -->
-  <cell id="8"  material="7"  region="  -7 38 -39" /> <!-- Upper plate region -->
-  <cell id="9"  material="4"  region="6 -7 32 -38" /> <!-- Downcomer -->
-  <cell id="10" material="5"  region="7 -8 31 -39" /> <!-- RPV -->
-  <cell id="11" material="6"  region="5 -6 32 -34" /> <!-- Bottom of radial reflector -->
-  <cell id="12" material="7"  region="5 -6 36 -38" /> <!-- Top of radial reflector -->
-
-  <!-- Fuel pin, cladding, cold water -->
-  <cell id="21" universe="1" material="1" region="-1"   />
-  <cell id="22" universe="1" material="2" region="1 -2" />
-  <cell id="23" universe="1" material="3" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="24" universe="2" material="3" region="-3"   />
-  <cell id="25" universe="2" material="2" region="3 -4" />
-  <cell id="26" universe="2" material="3" region="4"    />
-
-  <!-- Fuel pin, cladding, hot water -->
-  <cell id="27" universe="3" material="1" region="-1"   />
-  <cell id="28" universe="3" material="2" region="1 -2" />
-  <cell id="29" universe="3" material="4" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="30" universe="4" material="4" region="-3"   />
-  <cell id="31" universe="4" material="2" region="3 -4" />
-  <cell id="32" universe="4" material="4" region="4"    />
-
-  <!-- cell for water assembly (cold) -->
-  <cell id="50" universe="5" material="4" region="34 -35" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="60" universe="6" fill="100"   region="34 -35" />
-
-  <!-- cell for water assembly (hot) -->
-  <cell id="70" universe="7" material="3" region="35 -36" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="80" universe="8" fill="101"   region="35 -36" />
-
-  <!-- Fuel Assembly (Lower Half) -->
-  <lattice id="100">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-    </universes>
-  </lattice>
-
-  <!-- Fuel Assembly (Upper Half) -->
-  <lattice id="101">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Lower Half) -->
-  <lattice id="200">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Upper Half) -->
-  <lattice id="201">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-    </universes>
-  </lattice>
-
-</geometry>
diff --git a/tests/test_score_scatter_n/inputs_true.dat b/tests/test_score_scatter_n/inputs_true.dat
new file mode 100644
index 0000000000..68febf4bc5
--- /dev/null
+++ b/tests/test_score_scatter_n/inputs_true.dat
@@ -0,0 +1 @@
+414d0faeba75d27e4785faa9812f5eac6aa108e7fd3c1388d51ae8e0d7fddd25e9f61e51afdaa70874a32e1c3d2815d82b5c79636b1ccb0d6767144fcf6f813a
\ No newline at end of file
diff --git a/tests/test_score_scatter_n/materials.xml b/tests/test_score_scatter_n/materials.xml
deleted file mode 100644
index 9c0b74f3f1..0000000000
--- a/tests/test_score_scatter_n/materials.xml
+++ /dev/null
@@ -1,272 +0,0 @@
-<?xml version="1.0"?>
-<materials>
-
-  <default_xs>71c</default_xs>
-
-  <!-- Fuel composition -->
-  <material id="1">
-    <density value="10.062" units="g/cm3" />
-    <nuclide name="U-234"   ao="4.9476e-6" />
-    <nuclide name="U-235"   ao="4.8218e-4" />
-    <nuclide name="U-236"   ao="9.0402e-5" />
-    <nuclide name="U-238"   ao="2.1504e-2" />
-    <nuclide name="Np-237"  ao="7.3733e-6" />
-    <nuclide name="Pu-238"  ao="1.5148e-6" />
-    <nuclide name="Pu-239"  ao="1.3955e-4" />
-    <nuclide name="Pu-240"  ao="3.4405e-5" />
-    <nuclide name="Pu-241"  ao="2.1439e-5" />
-    <nuclide name="Pu-242"  ao="3.7422e-6" />
-    <nuclide name="Am-241"  ao="4.5041e-7" />
-    <nuclide name="Am-242m" ao="9.2301e-9" />
-    <nuclide name="Am-243"  ao="4.7878e-7" />
-    <nuclide name="Cm-242"  ao="1.0485e-7" />
-    <nuclide name="Cm-243"  ao="1.4268e-9" />
-    <nuclide name="Cm-244"  ao="8.8756e-8" />
-    <nuclide name="Cm-245"  ao="3.5285e-9" />
-    <nuclide name="Mo-95"   ao="2.6497e-5" />
-    <nuclide name="Tc-99"   ao="3.2772e-5" />
-    <nuclide name="Ru-101"  ao="3.0742e-5" />
-    <nuclide name="Ru-103"  ao="2.3505e-6" />
-    <nuclide name="Ag-109"  ao="2.0009e-6" />
-    <nuclide name="Xe-135"  ao="1.0801e-8" />
-    <nuclide name="Cs-133"  ao="3.4612e-5" />
-    <nuclide name="Nd-143"  ao="2.6078e-5" />
-    <nuclide name="Nd-145"  ao="1.9898e-5" />
-    <nuclide name="Sm-147"  ao="1.6128e-6" />
-    <nuclide name="Sm-149"  ao="1.1627e-7" />
-    <nuclide name="Sm-150"  ao="7.1727e-6" />
-    <nuclide name="Sm-151"  ao="5.4947e-7" />
-    <nuclide name="Sm-152"  ao="3.0221e-6" />
-    <nuclide name="Eu-153"  ao="2.6209e-6" />
-    <nuclide name="Gd-155"  ao="1.5369e-9" />
-    <nuclide name="O-16"    ao="4.5737e-2" />
-  </material>
-
-  <!-- Cladding composition -->
-  <material id="2">
-    <density value="5.77" units="g/cm3" />
-    <nuclide name="Zr-90" ao="0.5145" />
-    <nuclide name="Zr-91" ao="0.1122" />
-    <nuclide name="Zr-92" ao="0.1715" />
-    <nuclide name="Zr-94" ao="0.1738" />
-    <nuclide name="Zr-96" ao="0.0280" />
-  </material>
-
-  <!-- Cold borated water -->
-  <material id="3">
-    <density value="0.07416" units="atom/b-cm" />
-    <nuclide name="H-1" ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Hot borated water -->
-  <material id="4">
-    <density value="0.06614" units="atom/b-cm" />
-    <nuclide name="H-1"  ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- RPV Composition -->
-  <material id="5">
-    <density value="7.9" units="g/cm3" />
-    <nuclide name="Fe-54"  wo="0.05437098" />
-    <nuclide name="Fe-56"  wo="0.88500663" />
-    <nuclide name="Fe-57"  wo="0.0208008" />
-    <nuclide name="Fe-58"  wo="0.00282159" />
-    <nuclide name="Ni-58"  wo="0.0067198" />
-    <nuclide name="Ni-60"  wo="0.0026776" />
-    <nuclide name="Ni-61"  wo="0.0001183" />
-    <nuclide name="Ni-62"  wo="0.0003835" />
-    <nuclide name="Ni-64"  wo="0.0001008" />
-    <nuclide name="Mn-55"  wo="0.01" />
-    <nuclide name="Mo-92"  wo="0.000849" />
-    <nuclide name="Mo-94"  wo="0.0005418" />
-    <nuclide name="Mo-95"  wo="0.0009438" />
-    <nuclide name="Mo-96"  wo="0.0010002" />
-    <nuclide name="Mo-97"  wo="0.0005796" />
-    <nuclide name="Mo-98"  wo="0.0014814" />
-    <nuclide name="Mo-100" wo="0.0006042" />
-    <nuclide name="Si-28"  wo="0.00367464" />
-    <nuclide name="Si-29"  wo="0.00019336" />
-    <nuclide name="Si-30"  wo="0.000132" />
-    <nuclide name="Cr-50"  wo="0.00010435" />
-    <nuclide name="Cr-52"  wo="0.002092475" />
-    <nuclide name="Cr-53"  wo="0.00024185" />
-    <nuclide name="Cr-54"  wo="6.1325e-05" />
-    <nuclide name="C-Nat"  wo="0.0025" />
-    <nuclide name="Cu-63"  wo="0.0013696" />
-    <nuclide name="Cu-65"  wo="0.0006304" />
-  </material>
-
-  <!-- Lower radial reflector -->
-  <material id="6">
-    <density value="4.32" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0095661" />
-    <nuclide name="O-16"  wo="0.0759107" />
-    <nuclide name="B-10"  wo="3.08409e-5" />
-    <nuclide name="B-11"  wo="1.40499e-4" />
-    <nuclide name="Fe-54" wo="0.035620772088" />
-    <nuclide name="Fe-56" wo="0.579805982228" />
-    <nuclide name="Fe-57" wo="0.01362750048" />
-    <nuclide name="Fe-58" wo="0.001848545204" />
-    <nuclide name="Ni-58" wo="0.055298376566" />
-    <nuclide name="Ni-60" wo="0.022034425592" />
-    <nuclide name="Ni-61" wo="0.000973510811" />
-    <nuclide name="Ni-62" wo="0.003155886695" />
-    <nuclide name="Ni-64" wo="0.000829500336" />
-    <nuclide name="Mn-55" wo="0.0182870" />
-    <nuclide name="Si-28" wo="0.00839976771" />
-    <nuclide name="Si-29" wo="0.00044199679" />
-    <nuclide name="Si-30" wo="0.0003017355" />
-    <nuclide name="Cr-50" wo="0.007251360806" />
-    <nuclide name="Cr-52" wo="0.145407678031" />
-    <nuclide name="Cr-53" wo="0.016806340306" />
-    <nuclide name="Cr-54" wo="0.004261520857" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Upper radial reflector / Top plate region -->
-  <material id="7">
-    <density value="4.28" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0086117" />
-    <nuclide name="O-16"  wo="0.0683369" />
-    <nuclide name="B-10"  wo="2.77638e-5" />
-    <nuclide name="B-11"  wo="1.26481e-4" />
-    <nuclide name="Fe-54" wo="0.035953677186" />
-    <nuclide name="Fe-56" wo="0.585224740891" />
-    <nuclide name="Fe-57" wo="0.01375486056" />
-    <nuclide name="Fe-58" wo="0.001865821363" />
-    <nuclide name="Ni-58" wo="0.055815129186" />
-    <nuclide name="Ni-60" wo="0.022240333032" />
-    <nuclide name="Ni-61" wo="0.000982608081" />
-    <nuclide name="Ni-62" wo="0.003185377845" />
-    <nuclide name="Ni-64" wo="0.000837251856" />
-    <nuclide name="Mn-55" wo="0.0184579" />
-    <nuclide name="Si-28" wo="0.00847831314" />
-    <nuclide name="Si-29" wo="0.00044612986" />
-    <nuclide name="Si-30" wo="0.000304557" />
-    <nuclide name="Cr-50" wo="0.00731912987" />
-    <nuclide name="Cr-52" wo="0.146766614995" />
-    <nuclide name="Cr-53" wo="0.01696340737" />
-    <nuclide name="Cr-54" wo="0.004301347765" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom plate region -->
-  <material id="8">
-    <density value="7.184" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0011505" />
-    <nuclide name="O-16"  wo="0.0091296" />
-    <nuclide name="B-10"  wo="3.70915e-6" />
-    <nuclide name="B-11"  wo="1.68974e-5" />
-    <nuclide name="Fe-54" wo="0.03855611055" />
-    <nuclide name="Fe-56" wo="0.627585036425" />
-    <nuclide name="Fe-57" wo="0.014750478" />
-    <nuclide name="Fe-58" wo="0.002000875025" />
-    <nuclide name="Ni-58" wo="0.059855207342" />
-    <nuclide name="Ni-60" wo="0.023850159704" />
-    <nuclide name="Ni-61" wo="0.001053732407" />
-    <nuclide name="Ni-62" wo="0.003415945715" />
-    <nuclide name="Ni-64" wo="0.000897854832" />
-    <nuclide name="Mn-55" wo="0.0197940" />
-    <nuclide name="Si-28" wo="0.00909197802" />
-    <nuclide name="Si-29" wo="0.00047842098" />
-    <nuclide name="Si-30" wo="0.000326601" />
-    <nuclide name="Cr-50" wo="0.007848910646" />
-    <nuclide name="Cr-52" wo="0.157390026871" />
-    <nuclide name="Cr-53" wo="0.018191270146" />
-    <nuclide name="Cr-54" wo="0.004612692337" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom nozzle region -->
-  <material id="9">
-    <density value="2.53" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0245014" />
-    <nuclide name="O-16"  wo="0.1944274" />
-    <nuclide name="B-10"  wo="7.89917e-5" />
-    <nuclide name="B-11"  wo="3.59854e-4" />
-    <nuclide name="Fe-54" wo="0.030411411144" />
-    <nuclide name="Fe-56" wo="0.495012237964" />
-    <nuclide name="Fe-57" wo="0.01163454624" />
-    <nuclide name="Fe-58" wo="0.001578204652" />
-    <nuclide name="Ni-58" wo="0.047211231662" />
-    <nuclide name="Ni-60" wo="0.018811987544" />
-    <nuclide name="Ni-61" wo="0.000831139127" />
-    <nuclide name="Ni-62" wo="0.002694352115" />
-    <nuclide name="Ni-64" wo="0.000708189552" />
-    <nuclide name="Mn-55" wo="0.0156126" />
-    <nuclide name="Si-28" wo="0.007171335558" />
-    <nuclide name="Si-29" wo="0.000377356542" />
-    <nuclide name="Si-30" wo="0.0002576079" />
-    <nuclide name="Cr-50" wo="0.006190885148" />
-    <nuclide name="Cr-52" wo="0.124142524198" />
-    <nuclide name="Cr-53" wo="0.014348496148" />
-    <nuclide name="Cr-54" wo="0.003638294506" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top nozzle region -->
-  <material id="10">
-    <density value="1.746" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0358870" />
-    <nuclide name="O-16"  wo="0.2847761" />
-    <nuclide name="B-10"  wo="1.15699e-4" />
-    <nuclide name="B-11"  wo="5.27075e-4" />
-    <nuclide name="Fe-54" wo="0.02644016154" />
-    <nuclide name="Fe-56" wo="0.43037146399" />
-    <nuclide name="Fe-57" wo="0.0101152584" />
-    <nuclide name="Fe-58" wo="0.00137211607" />
-    <nuclide name="Ni-58" wo="0.04104621835" />
-    <nuclide name="Ni-60" wo="0.0163554502" />
-    <nuclide name="Ni-61" wo="0.000722605975" />
-    <nuclide name="Ni-62" wo="0.002342513875" />
-    <nuclide name="Ni-64" wo="0.0006157116" />
-    <nuclide name="Mn-55" wo="0.0135739" />
-    <nuclide name="Si-28" wo="0.006234853554" />
-    <nuclide name="Si-29" wo="0.000328078746" />
-    <nuclide name="Si-30" wo="0.0002239677" />
-    <nuclide name="Cr-50" wo="0.005382452306" />
-    <nuclide name="Cr-52" wo="0.107931450781" />
-    <nuclide name="Cr-53" wo="0.012474806806" />
-    <nuclide name="Cr-54" wo="0.003163190107" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top of Fuel Assemblies -->
-  <material id="11">
-    <density value="3.044" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0162913" />
-    <nuclide name="O-16"  wo="0.1292776" />
-    <nuclide name="B-10"  wo="5.25228e-5" />
-    <nuclide name="B-11"  wo="2.39272e-4" />
-    <nuclide name="Zr-90" wo="0.43313403903" />
-    <nuclide name="Zr-91" wo="0.09549277374" />
-    <nuclide name="Zr-92" wo="0.14759527104" />
-    <nuclide name="Zr-94" wo="0.15280552077" />
-    <nuclide name="Zr-96" wo="0.02511169542" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom of Fuel Assemblies -->
-  <material id="12">
-    <density value="1.762" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0292856" />
-    <nuclide name="O-16"  wo="0.2323919" />
-    <nuclide name="B-10"  wo="9.44159e-5" />
-    <nuclide name="B-11"  wo="4.30120e-4" />
-    <nuclide name="Zr-90" wo="0.3741373658" />
-    <nuclide name="Zr-91" wo="0.0824858164" />
-    <nuclide name="Zr-92" wo="0.1274914944" />
-    <nuclide name="Zr-94" wo="0.1319920622" />
-    <nuclide name="Zr-96" wo="0.0216912612" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-</materials>
diff --git a/tests/test_score_scatter_n/results_true.dat b/tests/test_score_scatter_n/results_true.dat
index b46a1e184d..96e56bd6ab 100644
--- a/tests/test_score_scatter_n/results_true.dat
+++ b/tests/test_score_scatter_n/results_true.dat
@@ -1,33 +1,33 @@
 k-combined:
-1.005983E+00 2.248579E-02
+9.903196E-01 4.279617E-02
 tally 1:
-1.169000E+01
-2.915330E+01
-1.247253E+00
-3.767436E-01
-5.330812E-01
-1.385083E-01
-2.987823E-01
-5.699361E-02
-2.645512E-01
-2.905381E-02
-3.200000E+00
-2.342600E+00
-3.809941E-01
-2.965326E-02
-4.319242E-01
-3.738822E-02
-9.261909E-02
-6.711328E-03
--6.052442E-02
-7.087230E-03
-4.064000E+01
-3.595168E+02
-2.096700E+01
-9.516606E+01
-7.560566E+00
-1.248694E+01
-2.093348E-01
-4.278510E-02
--1.449929E+00
-4.356371E-01
+1.485000E+01
+4.439790E+01
+1.259515E+00
+3.360064E-01
+7.983154E-01
+1.355632E-01
+3.425460E-01
+2.971972E-02
+2.949225E-01
+3.975603E-02
+4.120000E+00
+3.438000E+00
+6.222571E-01
+8.335984E-02
+1.670136E-01
+1.374768E-02
+-5.819374E-02
+1.091808E-02
+-6.389550E-02
+5.688533E-03
+5.173000E+01
+5.467243E+02
+2.669403E+01
+1.451361E+02
+9.691140E+00
+1.933574E+01
+5.860769E-01
+2.122377E-01
+-1.190340E+00
+3.145785E-01
diff --git a/tests/test_score_scatter_n/settings.xml b/tests/test_score_scatter_n/settings.xml
deleted file mode 100644
index 517637a59f..0000000000
--- a/tests/test_score_scatter_n/settings.xml
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0"?>
-<settings>
-
-  <eigenvalue>
-    <batches>10</batches>
-    <inactive>5</inactive>
-    <particles>100</particles>
-  </eigenvalue>
-
-  <source>
-    <space type="box">
-      <parameters>
-        -160 -160 -183
-         160  160  183
-      </parameters>
-    </space>
-  </source>
-
-</settings>
diff --git a/tests/test_score_scatter_n/tallies.xml b/tests/test_score_scatter_n/tallies.xml
deleted file mode 100644
index 0164dea358..0000000000
--- a/tests/test_score_scatter_n/tallies.xml
+++ /dev/null
@@ -1,9 +0,0 @@
-<?xml version="1.0"?>
-<tallies>
-
-  <tally id="1">
-    <filter type="cell" bins="21 22 23" />
-    <scores>scatter scatter-1 scatter-2 scatter-3 scatter-4</scores>
-  </tally>
-
-</tallies>
\ No newline at end of file
diff --git a/tests/test_score_scatter_n/test_score_scatter_n.py b/tests/test_score_scatter_n/test_score_scatter_n.py
index 1777db993e..47fd12b2ed 100644
--- a/tests/test_score_scatter_n/test_score_scatter_n.py
+++ b/tests/test_score_scatter_n/test_score_scatter_n.py
@@ -1,10 +1,33 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
-from testing_harness import TestHarness
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness, PyAPITestHarness
+import openmc
+
+
+class ScoreScatterNTestHarness(PyAPITestHarness):
+    def _build_inputs(self):
+        filt = openmc.Filter(type='cell', bins=(21, 22, 23))
+        t = openmc.Tally(tally_id=1)
+        t.add_filter(filt)
+        t.add_score('scatter')
+        t.add_score('scatter-1')
+        t.add_score('scatter-2')
+        t.add_score('scatter-3')
+        t.add_score('scatter-4')
+        self._input_set.tallies = openmc.TalliesFile()
+        self._input_set.tallies.add_tally(t)
+
+        super(ScoreScatterNTestHarness, self)._build_inputs()
+
+    def _cleanup(self):
+        super(ScoreScatterNTestHarness, self)._cleanup()
+        f = os.path.join(os.getcwd(), 'tallies.xml')
+        if os.path.exists(f): os.remove(f)
 
 
 if __name__ == '__main__':
-    harness = TestHarness('statepoint.10.*', True)
+    harness = ScoreScatterNTestHarness('statepoint.10.*', True)
     harness.main()
diff --git a/tests/test_score_scatter_pn/geometry.xml b/tests/test_score_scatter_pn/geometry.xml
deleted file mode 100644
index f6f067aadd..0000000000
--- a/tests/test_score_scatter_pn/geometry.xml
+++ /dev/null
@@ -1,181 +0,0 @@
-<?xml version="1.0"?>
-<geometry>
-
-  <surface id="1" type="z-cylinder" coeffs="0. 0. 0.41" />
-  <surface id="2" type="z-cylinder" coeffs="0. 0. 0.475" />
-  <surface id="3" type="z-cylinder" coeffs="0. 0. 0.56" />
-  <surface id="4" type="z-cylinder" coeffs="0. 0. 0.62" />
-  <surface id="5" type="z-cylinder" coeffs="0. 0. 187.6" />
-  <surface id="6" type="z-cylinder" coeffs="0. 0. 209.0" />
-  <surface id="7" type="z-cylinder" coeffs="0. 0. 229.0" />
-  <surface id="8" type="z-cylinder" coeffs="0. 0. 249.0" boundary="vacuum" />
-
-  <surface id="31" type="z-plane" coeffs="-229.0" boundary="vacuum" />
-  <surface id="32" type="z-plane" coeffs="-199.0" />
-  <surface id="33" type="z-plane" coeffs="-193.0" />
-  <surface id="34" type="z-plane" coeffs="-183.0" />
-  <surface id="35" type="z-plane" coeffs="0.0" />
-  <surface id="36" type="z-plane" coeffs="183.0" />
-  <surface id="37" type="z-plane" coeffs="203.0" />
-  <surface id="38" type="z-plane" coeffs="215.0" />
-  <surface id="39" type="z-plane" coeffs="223.0" boundary="vacuum" />
-
-  <!-- All geometry on base universe -->
-  <cell id="1"  fill="200"    region="  -6 34 -35" /> <!-- Lower core -->
-  <cell id="2"  fill="201"    region="  -6 35 -36" /> <!-- Upper core -->
-  <cell id="3"  material="8"  region="  -7 31 -32" /> <!-- Lower core plate region -->
-  <cell id="4"  material="9"  region="  -5 32 -33" /> <!-- Bottom nozzle region -->
-  <cell id="5"  material="12" region="  -5 33 -34" /> <!-- Bottom FA region -->
-  <cell id="6"  material="11" region="  -5 36 -37" /> <!-- Top FA region -->
-  <cell id="7"  material="10" region="  -5 37 -38" /> <!-- Top nozzle region -->
-  <cell id="8"  material="7"  region="  -7 38 -39" /> <!-- Upper plate region -->
-  <cell id="9"  material="4"  region="6 -7 32 -38" /> <!-- Downcomer -->
-  <cell id="10" material="5"  region="7 -8 31 -39" /> <!-- RPV -->
-  <cell id="11" material="6"  region="5 -6 32 -34" /> <!-- Bottom of radial reflector -->
-  <cell id="12" material="7"  region="5 -6 36 -38" /> <!-- Top of radial reflector -->
-
-  <!-- Fuel pin, cladding, cold water -->
-  <cell id="21" universe="1" material="1" region="-1"   />
-  <cell id="22" universe="1" material="2" region="1 -2" />
-  <cell id="23" universe="1" material="3" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="24" universe="2" material="3" region="-3"   />
-  <cell id="25" universe="2" material="2" region="3 -4" />
-  <cell id="26" universe="2" material="3" region="4"    />
-
-  <!-- Fuel pin, cladding, hot water -->
-  <cell id="27" universe="3" material="1" region="-1"   />
-  <cell id="28" universe="3" material="2" region="1 -2" />
-  <cell id="29" universe="3" material="4" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="30" universe="4" material="4" region="-3"   />
-  <cell id="31" universe="4" material="2" region="3 -4" />
-  <cell id="32" universe="4" material="4" region="4"    />
-
-  <!-- cell for water assembly (cold) -->
-  <cell id="50" universe="5" material="4" region="34 -35" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="60" universe="6" fill="100"   region="34 -35" />
-
-  <!-- cell for water assembly (hot) -->
-  <cell id="70" universe="7" material="3" region="35 -36" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="80" universe="8" fill="101"   region="35 -36" />
-
-  <!-- Fuel Assembly (Lower Half) -->
-  <lattice id="100">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-    </universes>
-  </lattice>
-
-  <!-- Fuel Assembly (Upper Half) -->
-  <lattice id="101">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Lower Half) -->
-  <lattice id="200">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Upper Half) -->
-  <lattice id="201">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-    </universes>
-  </lattice>
-
-</geometry>
diff --git a/tests/test_score_scatter_pn/inputs_true.dat b/tests/test_score_scatter_pn/inputs_true.dat
new file mode 100644
index 0000000000..53b1d21608
--- /dev/null
+++ b/tests/test_score_scatter_pn/inputs_true.dat
@@ -0,0 +1 @@
+f83e5a272e78dba7a4b3412aa264300efbeae641de0bbcae3febe7ba5fa6668dbf9364fdc7f1c431ab9c58aaf019ae41d98ee69d4dd035d6b5e0188e7d181b20
\ No newline at end of file
diff --git a/tests/test_score_scatter_pn/materials.xml b/tests/test_score_scatter_pn/materials.xml
deleted file mode 100644
index 9c0b74f3f1..0000000000
--- a/tests/test_score_scatter_pn/materials.xml
+++ /dev/null
@@ -1,272 +0,0 @@
-<?xml version="1.0"?>
-<materials>
-
-  <default_xs>71c</default_xs>
-
-  <!-- Fuel composition -->
-  <material id="1">
-    <density value="10.062" units="g/cm3" />
-    <nuclide name="U-234"   ao="4.9476e-6" />
-    <nuclide name="U-235"   ao="4.8218e-4" />
-    <nuclide name="U-236"   ao="9.0402e-5" />
-    <nuclide name="U-238"   ao="2.1504e-2" />
-    <nuclide name="Np-237"  ao="7.3733e-6" />
-    <nuclide name="Pu-238"  ao="1.5148e-6" />
-    <nuclide name="Pu-239"  ao="1.3955e-4" />
-    <nuclide name="Pu-240"  ao="3.4405e-5" />
-    <nuclide name="Pu-241"  ao="2.1439e-5" />
-    <nuclide name="Pu-242"  ao="3.7422e-6" />
-    <nuclide name="Am-241"  ao="4.5041e-7" />
-    <nuclide name="Am-242m" ao="9.2301e-9" />
-    <nuclide name="Am-243"  ao="4.7878e-7" />
-    <nuclide name="Cm-242"  ao="1.0485e-7" />
-    <nuclide name="Cm-243"  ao="1.4268e-9" />
-    <nuclide name="Cm-244"  ao="8.8756e-8" />
-    <nuclide name="Cm-245"  ao="3.5285e-9" />
-    <nuclide name="Mo-95"   ao="2.6497e-5" />
-    <nuclide name="Tc-99"   ao="3.2772e-5" />
-    <nuclide name="Ru-101"  ao="3.0742e-5" />
-    <nuclide name="Ru-103"  ao="2.3505e-6" />
-    <nuclide name="Ag-109"  ao="2.0009e-6" />
-    <nuclide name="Xe-135"  ao="1.0801e-8" />
-    <nuclide name="Cs-133"  ao="3.4612e-5" />
-    <nuclide name="Nd-143"  ao="2.6078e-5" />
-    <nuclide name="Nd-145"  ao="1.9898e-5" />
-    <nuclide name="Sm-147"  ao="1.6128e-6" />
-    <nuclide name="Sm-149"  ao="1.1627e-7" />
-    <nuclide name="Sm-150"  ao="7.1727e-6" />
-    <nuclide name="Sm-151"  ao="5.4947e-7" />
-    <nuclide name="Sm-152"  ao="3.0221e-6" />
-    <nuclide name="Eu-153"  ao="2.6209e-6" />
-    <nuclide name="Gd-155"  ao="1.5369e-9" />
-    <nuclide name="O-16"    ao="4.5737e-2" />
-  </material>
-
-  <!-- Cladding composition -->
-  <material id="2">
-    <density value="5.77" units="g/cm3" />
-    <nuclide name="Zr-90" ao="0.5145" />
-    <nuclide name="Zr-91" ao="0.1122" />
-    <nuclide name="Zr-92" ao="0.1715" />
-    <nuclide name="Zr-94" ao="0.1738" />
-    <nuclide name="Zr-96" ao="0.0280" />
-  </material>
-
-  <!-- Cold borated water -->
-  <material id="3">
-    <density value="0.07416" units="atom/b-cm" />
-    <nuclide name="H-1" ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Hot borated water -->
-  <material id="4">
-    <density value="0.06614" units="atom/b-cm" />
-    <nuclide name="H-1"  ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- RPV Composition -->
-  <material id="5">
-    <density value="7.9" units="g/cm3" />
-    <nuclide name="Fe-54"  wo="0.05437098" />
-    <nuclide name="Fe-56"  wo="0.88500663" />
-    <nuclide name="Fe-57"  wo="0.0208008" />
-    <nuclide name="Fe-58"  wo="0.00282159" />
-    <nuclide name="Ni-58"  wo="0.0067198" />
-    <nuclide name="Ni-60"  wo="0.0026776" />
-    <nuclide name="Ni-61"  wo="0.0001183" />
-    <nuclide name="Ni-62"  wo="0.0003835" />
-    <nuclide name="Ni-64"  wo="0.0001008" />
-    <nuclide name="Mn-55"  wo="0.01" />
-    <nuclide name="Mo-92"  wo="0.000849" />
-    <nuclide name="Mo-94"  wo="0.0005418" />
-    <nuclide name="Mo-95"  wo="0.0009438" />
-    <nuclide name="Mo-96"  wo="0.0010002" />
-    <nuclide name="Mo-97"  wo="0.0005796" />
-    <nuclide name="Mo-98"  wo="0.0014814" />
-    <nuclide name="Mo-100" wo="0.0006042" />
-    <nuclide name="Si-28"  wo="0.00367464" />
-    <nuclide name="Si-29"  wo="0.00019336" />
-    <nuclide name="Si-30"  wo="0.000132" />
-    <nuclide name="Cr-50"  wo="0.00010435" />
-    <nuclide name="Cr-52"  wo="0.002092475" />
-    <nuclide name="Cr-53"  wo="0.00024185" />
-    <nuclide name="Cr-54"  wo="6.1325e-05" />
-    <nuclide name="C-Nat"  wo="0.0025" />
-    <nuclide name="Cu-63"  wo="0.0013696" />
-    <nuclide name="Cu-65"  wo="0.0006304" />
-  </material>
-
-  <!-- Lower radial reflector -->
-  <material id="6">
-    <density value="4.32" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0095661" />
-    <nuclide name="O-16"  wo="0.0759107" />
-    <nuclide name="B-10"  wo="3.08409e-5" />
-    <nuclide name="B-11"  wo="1.40499e-4" />
-    <nuclide name="Fe-54" wo="0.035620772088" />
-    <nuclide name="Fe-56" wo="0.579805982228" />
-    <nuclide name="Fe-57" wo="0.01362750048" />
-    <nuclide name="Fe-58" wo="0.001848545204" />
-    <nuclide name="Ni-58" wo="0.055298376566" />
-    <nuclide name="Ni-60" wo="0.022034425592" />
-    <nuclide name="Ni-61" wo="0.000973510811" />
-    <nuclide name="Ni-62" wo="0.003155886695" />
-    <nuclide name="Ni-64" wo="0.000829500336" />
-    <nuclide name="Mn-55" wo="0.0182870" />
-    <nuclide name="Si-28" wo="0.00839976771" />
-    <nuclide name="Si-29" wo="0.00044199679" />
-    <nuclide name="Si-30" wo="0.0003017355" />
-    <nuclide name="Cr-50" wo="0.007251360806" />
-    <nuclide name="Cr-52" wo="0.145407678031" />
-    <nuclide name="Cr-53" wo="0.016806340306" />
-    <nuclide name="Cr-54" wo="0.004261520857" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Upper radial reflector / Top plate region -->
-  <material id="7">
-    <density value="4.28" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0086117" />
-    <nuclide name="O-16"  wo="0.0683369" />
-    <nuclide name="B-10"  wo="2.77638e-5" />
-    <nuclide name="B-11"  wo="1.26481e-4" />
-    <nuclide name="Fe-54" wo="0.035953677186" />
-    <nuclide name="Fe-56" wo="0.585224740891" />
-    <nuclide name="Fe-57" wo="0.01375486056" />
-    <nuclide name="Fe-58" wo="0.001865821363" />
-    <nuclide name="Ni-58" wo="0.055815129186" />
-    <nuclide name="Ni-60" wo="0.022240333032" />
-    <nuclide name="Ni-61" wo="0.000982608081" />
-    <nuclide name="Ni-62" wo="0.003185377845" />
-    <nuclide name="Ni-64" wo="0.000837251856" />
-    <nuclide name="Mn-55" wo="0.0184579" />
-    <nuclide name="Si-28" wo="0.00847831314" />
-    <nuclide name="Si-29" wo="0.00044612986" />
-    <nuclide name="Si-30" wo="0.000304557" />
-    <nuclide name="Cr-50" wo="0.00731912987" />
-    <nuclide name="Cr-52" wo="0.146766614995" />
-    <nuclide name="Cr-53" wo="0.01696340737" />
-    <nuclide name="Cr-54" wo="0.004301347765" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom plate region -->
-  <material id="8">
-    <density value="7.184" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0011505" />
-    <nuclide name="O-16"  wo="0.0091296" />
-    <nuclide name="B-10"  wo="3.70915e-6" />
-    <nuclide name="B-11"  wo="1.68974e-5" />
-    <nuclide name="Fe-54" wo="0.03855611055" />
-    <nuclide name="Fe-56" wo="0.627585036425" />
-    <nuclide name="Fe-57" wo="0.014750478" />
-    <nuclide name="Fe-58" wo="0.002000875025" />
-    <nuclide name="Ni-58" wo="0.059855207342" />
-    <nuclide name="Ni-60" wo="0.023850159704" />
-    <nuclide name="Ni-61" wo="0.001053732407" />
-    <nuclide name="Ni-62" wo="0.003415945715" />
-    <nuclide name="Ni-64" wo="0.000897854832" />
-    <nuclide name="Mn-55" wo="0.0197940" />
-    <nuclide name="Si-28" wo="0.00909197802" />
-    <nuclide name="Si-29" wo="0.00047842098" />
-    <nuclide name="Si-30" wo="0.000326601" />
-    <nuclide name="Cr-50" wo="0.007848910646" />
-    <nuclide name="Cr-52" wo="0.157390026871" />
-    <nuclide name="Cr-53" wo="0.018191270146" />
-    <nuclide name="Cr-54" wo="0.004612692337" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom nozzle region -->
-  <material id="9">
-    <density value="2.53" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0245014" />
-    <nuclide name="O-16"  wo="0.1944274" />
-    <nuclide name="B-10"  wo="7.89917e-5" />
-    <nuclide name="B-11"  wo="3.59854e-4" />
-    <nuclide name="Fe-54" wo="0.030411411144" />
-    <nuclide name="Fe-56" wo="0.495012237964" />
-    <nuclide name="Fe-57" wo="0.01163454624" />
-    <nuclide name="Fe-58" wo="0.001578204652" />
-    <nuclide name="Ni-58" wo="0.047211231662" />
-    <nuclide name="Ni-60" wo="0.018811987544" />
-    <nuclide name="Ni-61" wo="0.000831139127" />
-    <nuclide name="Ni-62" wo="0.002694352115" />
-    <nuclide name="Ni-64" wo="0.000708189552" />
-    <nuclide name="Mn-55" wo="0.0156126" />
-    <nuclide name="Si-28" wo="0.007171335558" />
-    <nuclide name="Si-29" wo="0.000377356542" />
-    <nuclide name="Si-30" wo="0.0002576079" />
-    <nuclide name="Cr-50" wo="0.006190885148" />
-    <nuclide name="Cr-52" wo="0.124142524198" />
-    <nuclide name="Cr-53" wo="0.014348496148" />
-    <nuclide name="Cr-54" wo="0.003638294506" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top nozzle region -->
-  <material id="10">
-    <density value="1.746" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0358870" />
-    <nuclide name="O-16"  wo="0.2847761" />
-    <nuclide name="B-10"  wo="1.15699e-4" />
-    <nuclide name="B-11"  wo="5.27075e-4" />
-    <nuclide name="Fe-54" wo="0.02644016154" />
-    <nuclide name="Fe-56" wo="0.43037146399" />
-    <nuclide name="Fe-57" wo="0.0101152584" />
-    <nuclide name="Fe-58" wo="0.00137211607" />
-    <nuclide name="Ni-58" wo="0.04104621835" />
-    <nuclide name="Ni-60" wo="0.0163554502" />
-    <nuclide name="Ni-61" wo="0.000722605975" />
-    <nuclide name="Ni-62" wo="0.002342513875" />
-    <nuclide name="Ni-64" wo="0.0006157116" />
-    <nuclide name="Mn-55" wo="0.0135739" />
-    <nuclide name="Si-28" wo="0.006234853554" />
-    <nuclide name="Si-29" wo="0.000328078746" />
-    <nuclide name="Si-30" wo="0.0002239677" />
-    <nuclide name="Cr-50" wo="0.005382452306" />
-    <nuclide name="Cr-52" wo="0.107931450781" />
-    <nuclide name="Cr-53" wo="0.012474806806" />
-    <nuclide name="Cr-54" wo="0.003163190107" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top of Fuel Assemblies -->
-  <material id="11">
-    <density value="3.044" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0162913" />
-    <nuclide name="O-16"  wo="0.1292776" />
-    <nuclide name="B-10"  wo="5.25228e-5" />
-    <nuclide name="B-11"  wo="2.39272e-4" />
-    <nuclide name="Zr-90" wo="0.43313403903" />
-    <nuclide name="Zr-91" wo="0.09549277374" />
-    <nuclide name="Zr-92" wo="0.14759527104" />
-    <nuclide name="Zr-94" wo="0.15280552077" />
-    <nuclide name="Zr-96" wo="0.02511169542" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom of Fuel Assemblies -->
-  <material id="12">
-    <density value="1.762" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0292856" />
-    <nuclide name="O-16"  wo="0.2323919" />
-    <nuclide name="B-10"  wo="9.44159e-5" />
-    <nuclide name="B-11"  wo="4.30120e-4" />
-    <nuclide name="Zr-90" wo="0.3741373658" />
-    <nuclide name="Zr-91" wo="0.0824858164" />
-    <nuclide name="Zr-92" wo="0.1274914944" />
-    <nuclide name="Zr-94" wo="0.1319920622" />
-    <nuclide name="Zr-96" wo="0.0216912612" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-</materials>
diff --git a/tests/test_score_scatter_pn/results_true.dat b/tests/test_score_scatter_pn/results_true.dat
index 3c34895d90..753216a8b7 100644
--- a/tests/test_score_scatter_pn/results_true.dat
+++ b/tests/test_score_scatter_pn/results_true.dat
@@ -1,24 +1,24 @@
 k-combined:
-1.005983E+00 2.248579E-02
+9.903196E-01 4.279617E-02
 tally 1:
-1.169000E+01
-2.915330E+01
-1.247253E+00
-3.767436E-01
-5.330812E-01
-1.385083E-01
-2.987823E-01
-5.699361E-02
-2.645512E-01
-2.905381E-02
+1.485000E+01
+4.439790E+01
+1.259515E+00
+3.360064E-01
+7.983154E-01
+1.355632E-01
+3.425460E-01
+2.971972E-02
+2.949225E-01
+3.975603E-02
 tally 2:
-1.169000E+01
-2.915330E+01
-1.247253E+00
-3.767436E-01
-5.330812E-01
-1.385083E-01
-2.987823E-01
-5.699361E-02
-2.645512E-01
-2.905381E-02
+1.485000E+01
+4.439790E+01
+1.259515E+00
+3.360064E-01
+7.983154E-01
+1.355632E-01
+3.425460E-01
+2.971972E-02
+2.949225E-01
+3.975603E-02
diff --git a/tests/test_score_scatter_pn/settings.xml b/tests/test_score_scatter_pn/settings.xml
deleted file mode 100644
index 517637a59f..0000000000
--- a/tests/test_score_scatter_pn/settings.xml
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0"?>
-<settings>
-
-  <eigenvalue>
-    <batches>10</batches>
-    <inactive>5</inactive>
-    <particles>100</particles>
-  </eigenvalue>
-
-  <source>
-    <space type="box">
-      <parameters>
-        -160 -160 -183
-         160  160  183
-      </parameters>
-    </space>
-  </source>
-
-</settings>
diff --git a/tests/test_score_scatter_pn/tallies.xml b/tests/test_score_scatter_pn/tallies.xml
deleted file mode 100644
index 61a7854d68..0000000000
--- a/tests/test_score_scatter_pn/tallies.xml
+++ /dev/null
@@ -1,14 +0,0 @@
-<?xml version="1.0"?>
-<tallies>
-
-  <tally id="1">
-    <filter type="cell" bins="21" />
-    <scores>scatter-0 scatter-1 scatter-2 scatter-3 scatter-4</scores>
-  </tally>
-
-  <tally id="2">
-    <filter type="cell" bins="21" />
-    <scores>scatter-p4</scores>
-  </tally>
-
-</tallies>
\ No newline at end of file
diff --git a/tests/test_score_scatter_pn/test_score_scatter_pn.py b/tests/test_score_scatter_pn/test_score_scatter_pn.py
index 1777db993e..9186fe5480 100644
--- a/tests/test_score_scatter_pn/test_score_scatter_pn.py
+++ b/tests/test_score_scatter_pn/test_score_scatter_pn.py
@@ -1,10 +1,38 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
-from testing_harness import TestHarness
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness, PyAPITestHarness
+import openmc
+
+
+class ScoreScatterPNTestHarness(PyAPITestHarness):
+    def _build_inputs(self):
+        filt = openmc.Filter(type='cell', bins=(21, ))
+        t1 = openmc.Tally(tally_id=1)
+        t1.add_filter(filt)
+        t1.add_score('scatter-0')
+        t1.add_score('scatter-1')
+        t1.add_score('scatter-2')
+        t1.add_score('scatter-3')
+        t1.add_score('scatter-4')
+        t1.estimator = 'analog'
+        t2 = openmc.Tally(tally_id=2)
+        t2.add_filter(filt)
+        t2.add_score('scatter-p4')
+        self._input_set.tallies = openmc.TalliesFile()
+        self._input_set.tallies.add_tally(t1)
+        self._input_set.tallies.add_tally(t2)
+
+        super(ScoreScatterPNTestHarness, self)._build_inputs()
+
+    def _cleanup(self):
+        super(ScoreScatterPNTestHarness, self)._cleanup()
+        f = os.path.join(os.getcwd(), 'tallies.xml')
+        if os.path.exists(f): os.remove(f)
 
 
 if __name__ == '__main__':
-    harness = TestHarness('statepoint.10.*', True)
+    harness = ScoreScatterPNTestHarness('statepoint.10.*', True)
     harness.main()
diff --git a/tests/test_score_scatter_yn/geometry.xml b/tests/test_score_scatter_yn/geometry.xml
deleted file mode 100644
index f6f067aadd..0000000000
--- a/tests/test_score_scatter_yn/geometry.xml
+++ /dev/null
@@ -1,181 +0,0 @@
-<?xml version="1.0"?>
-<geometry>
-
-  <surface id="1" type="z-cylinder" coeffs="0. 0. 0.41" />
-  <surface id="2" type="z-cylinder" coeffs="0. 0. 0.475" />
-  <surface id="3" type="z-cylinder" coeffs="0. 0. 0.56" />
-  <surface id="4" type="z-cylinder" coeffs="0. 0. 0.62" />
-  <surface id="5" type="z-cylinder" coeffs="0. 0. 187.6" />
-  <surface id="6" type="z-cylinder" coeffs="0. 0. 209.0" />
-  <surface id="7" type="z-cylinder" coeffs="0. 0. 229.0" />
-  <surface id="8" type="z-cylinder" coeffs="0. 0. 249.0" boundary="vacuum" />
-
-  <surface id="31" type="z-plane" coeffs="-229.0" boundary="vacuum" />
-  <surface id="32" type="z-plane" coeffs="-199.0" />
-  <surface id="33" type="z-plane" coeffs="-193.0" />
-  <surface id="34" type="z-plane" coeffs="-183.0" />
-  <surface id="35" type="z-plane" coeffs="0.0" />
-  <surface id="36" type="z-plane" coeffs="183.0" />
-  <surface id="37" type="z-plane" coeffs="203.0" />
-  <surface id="38" type="z-plane" coeffs="215.0" />
-  <surface id="39" type="z-plane" coeffs="223.0" boundary="vacuum" />
-
-  <!-- All geometry on base universe -->
-  <cell id="1"  fill="200"    region="  -6 34 -35" /> <!-- Lower core -->
-  <cell id="2"  fill="201"    region="  -6 35 -36" /> <!-- Upper core -->
-  <cell id="3"  material="8"  region="  -7 31 -32" /> <!-- Lower core plate region -->
-  <cell id="4"  material="9"  region="  -5 32 -33" /> <!-- Bottom nozzle region -->
-  <cell id="5"  material="12" region="  -5 33 -34" /> <!-- Bottom FA region -->
-  <cell id="6"  material="11" region="  -5 36 -37" /> <!-- Top FA region -->
-  <cell id="7"  material="10" region="  -5 37 -38" /> <!-- Top nozzle region -->
-  <cell id="8"  material="7"  region="  -7 38 -39" /> <!-- Upper plate region -->
-  <cell id="9"  material="4"  region="6 -7 32 -38" /> <!-- Downcomer -->
-  <cell id="10" material="5"  region="7 -8 31 -39" /> <!-- RPV -->
-  <cell id="11" material="6"  region="5 -6 32 -34" /> <!-- Bottom of radial reflector -->
-  <cell id="12" material="7"  region="5 -6 36 -38" /> <!-- Top of radial reflector -->
-
-  <!-- Fuel pin, cladding, cold water -->
-  <cell id="21" universe="1" material="1" region="-1"   />
-  <cell id="22" universe="1" material="2" region="1 -2" />
-  <cell id="23" universe="1" material="3" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="24" universe="2" material="3" region="-3"   />
-  <cell id="25" universe="2" material="2" region="3 -4" />
-  <cell id="26" universe="2" material="3" region="4"    />
-
-  <!-- Fuel pin, cladding, hot water -->
-  <cell id="27" universe="3" material="1" region="-1"   />
-  <cell id="28" universe="3" material="2" region="1 -2" />
-  <cell id="29" universe="3" material="4" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="30" universe="4" material="4" region="-3"   />
-  <cell id="31" universe="4" material="2" region="3 -4" />
-  <cell id="32" universe="4" material="4" region="4"    />
-
-  <!-- cell for water assembly (cold) -->
-  <cell id="50" universe="5" material="4" region="34 -35" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="60" universe="6" fill="100"   region="34 -35" />
-
-  <!-- cell for water assembly (hot) -->
-  <cell id="70" universe="7" material="3" region="35 -36" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="80" universe="8" fill="101"   region="35 -36" />
-
-  <!-- Fuel Assembly (Lower Half) -->
-  <lattice id="100">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-    </universes>
-  </lattice>
-
-  <!-- Fuel Assembly (Upper Half) -->
-  <lattice id="101">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Lower Half) -->
-  <lattice id="200">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Upper Half) -->
-  <lattice id="201">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-    </universes>
-  </lattice>
-
-</geometry>
diff --git a/tests/test_score_scatter_yn/inputs_true.dat b/tests/test_score_scatter_yn/inputs_true.dat
new file mode 100644
index 0000000000..6e5210212e
--- /dev/null
+++ b/tests/test_score_scatter_yn/inputs_true.dat
@@ -0,0 +1 @@
+c90d836355fcbe14112c16f8743b9180371400c022b19f693881d91924788555ed1507a1936b4d241a63564a7661f380c5d0568d398fa8a20a25f41c5b7c4fb8
\ No newline at end of file
diff --git a/tests/test_score_scatter_yn/materials.xml b/tests/test_score_scatter_yn/materials.xml
deleted file mode 100644
index 9c0b74f3f1..0000000000
--- a/tests/test_score_scatter_yn/materials.xml
+++ /dev/null
@@ -1,272 +0,0 @@
-<?xml version="1.0"?>
-<materials>
-
-  <default_xs>71c</default_xs>
-
-  <!-- Fuel composition -->
-  <material id="1">
-    <density value="10.062" units="g/cm3" />
-    <nuclide name="U-234"   ao="4.9476e-6" />
-    <nuclide name="U-235"   ao="4.8218e-4" />
-    <nuclide name="U-236"   ao="9.0402e-5" />
-    <nuclide name="U-238"   ao="2.1504e-2" />
-    <nuclide name="Np-237"  ao="7.3733e-6" />
-    <nuclide name="Pu-238"  ao="1.5148e-6" />
-    <nuclide name="Pu-239"  ao="1.3955e-4" />
-    <nuclide name="Pu-240"  ao="3.4405e-5" />
-    <nuclide name="Pu-241"  ao="2.1439e-5" />
-    <nuclide name="Pu-242"  ao="3.7422e-6" />
-    <nuclide name="Am-241"  ao="4.5041e-7" />
-    <nuclide name="Am-242m" ao="9.2301e-9" />
-    <nuclide name="Am-243"  ao="4.7878e-7" />
-    <nuclide name="Cm-242"  ao="1.0485e-7" />
-    <nuclide name="Cm-243"  ao="1.4268e-9" />
-    <nuclide name="Cm-244"  ao="8.8756e-8" />
-    <nuclide name="Cm-245"  ao="3.5285e-9" />
-    <nuclide name="Mo-95"   ao="2.6497e-5" />
-    <nuclide name="Tc-99"   ao="3.2772e-5" />
-    <nuclide name="Ru-101"  ao="3.0742e-5" />
-    <nuclide name="Ru-103"  ao="2.3505e-6" />
-    <nuclide name="Ag-109"  ao="2.0009e-6" />
-    <nuclide name="Xe-135"  ao="1.0801e-8" />
-    <nuclide name="Cs-133"  ao="3.4612e-5" />
-    <nuclide name="Nd-143"  ao="2.6078e-5" />
-    <nuclide name="Nd-145"  ao="1.9898e-5" />
-    <nuclide name="Sm-147"  ao="1.6128e-6" />
-    <nuclide name="Sm-149"  ao="1.1627e-7" />
-    <nuclide name="Sm-150"  ao="7.1727e-6" />
-    <nuclide name="Sm-151"  ao="5.4947e-7" />
-    <nuclide name="Sm-152"  ao="3.0221e-6" />
-    <nuclide name="Eu-153"  ao="2.6209e-6" />
-    <nuclide name="Gd-155"  ao="1.5369e-9" />
-    <nuclide name="O-16"    ao="4.5737e-2" />
-  </material>
-
-  <!-- Cladding composition -->
-  <material id="2">
-    <density value="5.77" units="g/cm3" />
-    <nuclide name="Zr-90" ao="0.5145" />
-    <nuclide name="Zr-91" ao="0.1122" />
-    <nuclide name="Zr-92" ao="0.1715" />
-    <nuclide name="Zr-94" ao="0.1738" />
-    <nuclide name="Zr-96" ao="0.0280" />
-  </material>
-
-  <!-- Cold borated water -->
-  <material id="3">
-    <density value="0.07416" units="atom/b-cm" />
-    <nuclide name="H-1" ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Hot borated water -->
-  <material id="4">
-    <density value="0.06614" units="atom/b-cm" />
-    <nuclide name="H-1"  ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- RPV Composition -->
-  <material id="5">
-    <density value="7.9" units="g/cm3" />
-    <nuclide name="Fe-54"  wo="0.05437098" />
-    <nuclide name="Fe-56"  wo="0.88500663" />
-    <nuclide name="Fe-57"  wo="0.0208008" />
-    <nuclide name="Fe-58"  wo="0.00282159" />
-    <nuclide name="Ni-58"  wo="0.0067198" />
-    <nuclide name="Ni-60"  wo="0.0026776" />
-    <nuclide name="Ni-61"  wo="0.0001183" />
-    <nuclide name="Ni-62"  wo="0.0003835" />
-    <nuclide name="Ni-64"  wo="0.0001008" />
-    <nuclide name="Mn-55"  wo="0.01" />
-    <nuclide name="Mo-92"  wo="0.000849" />
-    <nuclide name="Mo-94"  wo="0.0005418" />
-    <nuclide name="Mo-95"  wo="0.0009438" />
-    <nuclide name="Mo-96"  wo="0.0010002" />
-    <nuclide name="Mo-97"  wo="0.0005796" />
-    <nuclide name="Mo-98"  wo="0.0014814" />
-    <nuclide name="Mo-100" wo="0.0006042" />
-    <nuclide name="Si-28"  wo="0.00367464" />
-    <nuclide name="Si-29"  wo="0.00019336" />
-    <nuclide name="Si-30"  wo="0.000132" />
-    <nuclide name="Cr-50"  wo="0.00010435" />
-    <nuclide name="Cr-52"  wo="0.002092475" />
-    <nuclide name="Cr-53"  wo="0.00024185" />
-    <nuclide name="Cr-54"  wo="6.1325e-05" />
-    <nuclide name="C-Nat"  wo="0.0025" />
-    <nuclide name="Cu-63"  wo="0.0013696" />
-    <nuclide name="Cu-65"  wo="0.0006304" />
-  </material>
-
-  <!-- Lower radial reflector -->
-  <material id="6">
-    <density value="4.32" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0095661" />
-    <nuclide name="O-16"  wo="0.0759107" />
-    <nuclide name="B-10"  wo="3.08409e-5" />
-    <nuclide name="B-11"  wo="1.40499e-4" />
-    <nuclide name="Fe-54" wo="0.035620772088" />
-    <nuclide name="Fe-56" wo="0.579805982228" />
-    <nuclide name="Fe-57" wo="0.01362750048" />
-    <nuclide name="Fe-58" wo="0.001848545204" />
-    <nuclide name="Ni-58" wo="0.055298376566" />
-    <nuclide name="Ni-60" wo="0.022034425592" />
-    <nuclide name="Ni-61" wo="0.000973510811" />
-    <nuclide name="Ni-62" wo="0.003155886695" />
-    <nuclide name="Ni-64" wo="0.000829500336" />
-    <nuclide name="Mn-55" wo="0.0182870" />
-    <nuclide name="Si-28" wo="0.00839976771" />
-    <nuclide name="Si-29" wo="0.00044199679" />
-    <nuclide name="Si-30" wo="0.0003017355" />
-    <nuclide name="Cr-50" wo="0.007251360806" />
-    <nuclide name="Cr-52" wo="0.145407678031" />
-    <nuclide name="Cr-53" wo="0.016806340306" />
-    <nuclide name="Cr-54" wo="0.004261520857" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Upper radial reflector / Top plate region -->
-  <material id="7">
-    <density value="4.28" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0086117" />
-    <nuclide name="O-16"  wo="0.0683369" />
-    <nuclide name="B-10"  wo="2.77638e-5" />
-    <nuclide name="B-11"  wo="1.26481e-4" />
-    <nuclide name="Fe-54" wo="0.035953677186" />
-    <nuclide name="Fe-56" wo="0.585224740891" />
-    <nuclide name="Fe-57" wo="0.01375486056" />
-    <nuclide name="Fe-58" wo="0.001865821363" />
-    <nuclide name="Ni-58" wo="0.055815129186" />
-    <nuclide name="Ni-60" wo="0.022240333032" />
-    <nuclide name="Ni-61" wo="0.000982608081" />
-    <nuclide name="Ni-62" wo="0.003185377845" />
-    <nuclide name="Ni-64" wo="0.000837251856" />
-    <nuclide name="Mn-55" wo="0.0184579" />
-    <nuclide name="Si-28" wo="0.00847831314" />
-    <nuclide name="Si-29" wo="0.00044612986" />
-    <nuclide name="Si-30" wo="0.000304557" />
-    <nuclide name="Cr-50" wo="0.00731912987" />
-    <nuclide name="Cr-52" wo="0.146766614995" />
-    <nuclide name="Cr-53" wo="0.01696340737" />
-    <nuclide name="Cr-54" wo="0.004301347765" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom plate region -->
-  <material id="8">
-    <density value="7.184" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0011505" />
-    <nuclide name="O-16"  wo="0.0091296" />
-    <nuclide name="B-10"  wo="3.70915e-6" />
-    <nuclide name="B-11"  wo="1.68974e-5" />
-    <nuclide name="Fe-54" wo="0.03855611055" />
-    <nuclide name="Fe-56" wo="0.627585036425" />
-    <nuclide name="Fe-57" wo="0.014750478" />
-    <nuclide name="Fe-58" wo="0.002000875025" />
-    <nuclide name="Ni-58" wo="0.059855207342" />
-    <nuclide name="Ni-60" wo="0.023850159704" />
-    <nuclide name="Ni-61" wo="0.001053732407" />
-    <nuclide name="Ni-62" wo="0.003415945715" />
-    <nuclide name="Ni-64" wo="0.000897854832" />
-    <nuclide name="Mn-55" wo="0.0197940" />
-    <nuclide name="Si-28" wo="0.00909197802" />
-    <nuclide name="Si-29" wo="0.00047842098" />
-    <nuclide name="Si-30" wo="0.000326601" />
-    <nuclide name="Cr-50" wo="0.007848910646" />
-    <nuclide name="Cr-52" wo="0.157390026871" />
-    <nuclide name="Cr-53" wo="0.018191270146" />
-    <nuclide name="Cr-54" wo="0.004612692337" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom nozzle region -->
-  <material id="9">
-    <density value="2.53" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0245014" />
-    <nuclide name="O-16"  wo="0.1944274" />
-    <nuclide name="B-10"  wo="7.89917e-5" />
-    <nuclide name="B-11"  wo="3.59854e-4" />
-    <nuclide name="Fe-54" wo="0.030411411144" />
-    <nuclide name="Fe-56" wo="0.495012237964" />
-    <nuclide name="Fe-57" wo="0.01163454624" />
-    <nuclide name="Fe-58" wo="0.001578204652" />
-    <nuclide name="Ni-58" wo="0.047211231662" />
-    <nuclide name="Ni-60" wo="0.018811987544" />
-    <nuclide name="Ni-61" wo="0.000831139127" />
-    <nuclide name="Ni-62" wo="0.002694352115" />
-    <nuclide name="Ni-64" wo="0.000708189552" />
-    <nuclide name="Mn-55" wo="0.0156126" />
-    <nuclide name="Si-28" wo="0.007171335558" />
-    <nuclide name="Si-29" wo="0.000377356542" />
-    <nuclide name="Si-30" wo="0.0002576079" />
-    <nuclide name="Cr-50" wo="0.006190885148" />
-    <nuclide name="Cr-52" wo="0.124142524198" />
-    <nuclide name="Cr-53" wo="0.014348496148" />
-    <nuclide name="Cr-54" wo="0.003638294506" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top nozzle region -->
-  <material id="10">
-    <density value="1.746" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0358870" />
-    <nuclide name="O-16"  wo="0.2847761" />
-    <nuclide name="B-10"  wo="1.15699e-4" />
-    <nuclide name="B-11"  wo="5.27075e-4" />
-    <nuclide name="Fe-54" wo="0.02644016154" />
-    <nuclide name="Fe-56" wo="0.43037146399" />
-    <nuclide name="Fe-57" wo="0.0101152584" />
-    <nuclide name="Fe-58" wo="0.00137211607" />
-    <nuclide name="Ni-58" wo="0.04104621835" />
-    <nuclide name="Ni-60" wo="0.0163554502" />
-    <nuclide name="Ni-61" wo="0.000722605975" />
-    <nuclide name="Ni-62" wo="0.002342513875" />
-    <nuclide name="Ni-64" wo="0.0006157116" />
-    <nuclide name="Mn-55" wo="0.0135739" />
-    <nuclide name="Si-28" wo="0.006234853554" />
-    <nuclide name="Si-29" wo="0.000328078746" />
-    <nuclide name="Si-30" wo="0.0002239677" />
-    <nuclide name="Cr-50" wo="0.005382452306" />
-    <nuclide name="Cr-52" wo="0.107931450781" />
-    <nuclide name="Cr-53" wo="0.012474806806" />
-    <nuclide name="Cr-54" wo="0.003163190107" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top of Fuel Assemblies -->
-  <material id="11">
-    <density value="3.044" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0162913" />
-    <nuclide name="O-16"  wo="0.1292776" />
-    <nuclide name="B-10"  wo="5.25228e-5" />
-    <nuclide name="B-11"  wo="2.39272e-4" />
-    <nuclide name="Zr-90" wo="0.43313403903" />
-    <nuclide name="Zr-91" wo="0.09549277374" />
-    <nuclide name="Zr-92" wo="0.14759527104" />
-    <nuclide name="Zr-94" wo="0.15280552077" />
-    <nuclide name="Zr-96" wo="0.02511169542" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom of Fuel Assemblies -->
-  <material id="12">
-    <density value="1.762" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0292856" />
-    <nuclide name="O-16"  wo="0.2323919" />
-    <nuclide name="B-10"  wo="9.44159e-5" />
-    <nuclide name="B-11"  wo="4.30120e-4" />
-    <nuclide name="Zr-90" wo="0.3741373658" />
-    <nuclide name="Zr-91" wo="0.0824858164" />
-    <nuclide name="Zr-92" wo="0.1274914944" />
-    <nuclide name="Zr-94" wo="0.1319920622" />
-    <nuclide name="Zr-96" wo="0.0216912612" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-</materials>
diff --git a/tests/test_score_scatter_yn/results_true.dat b/tests/test_score_scatter_yn/results_true.dat
index 9df7ea42a7..20b7672eb5 100644
--- a/tests/test_score_scatter_yn/results_true.dat
+++ b/tests/test_score_scatter_yn/results_true.dat
@@ -1,56 +1,56 @@
 k-combined:
-1.005983E+00 2.248579E-02
+9.903196E-01 4.279617E-02
 tally 1:
-1.169000E+01
-2.915330E+01
+1.485000E+01
+4.439790E+01
 tally 2:
-1.169000E+01
-2.915330E+01
--2.198379E-01
-2.828670E-02
--1.317276E-01
-9.568596E-03
-8.309792E-02
-1.155410E-02
--2.288506E-02
-3.710542E-03
--2.720674E-02
-1.789163E-03
--1.323964E-02
-1.819112E-04
-8.941597E-02
-4.265616E-03
-1.516805E-01
-1.332526E-02
--1.832782E-02
-6.611171E-03
-1.311371E-02
-2.840648E-03
-3.728365E-02
-2.866806E-03
--5.100587E-02
-2.957146E-03
-3.388028E-02
-2.481570E-03
--7.766921E-02
-3.129377E-03
-1.666131E-02
-3.828290E-03
-8.102553E-02
-2.118169E-03
-6.303084E-03
-7.156173E-04
--2.083478E-03
-2.683340E-03
-6.794806E-03
-3.912783E-04
-1.005390E-01
-2.920205E-03
--5.332517E-02
-2.205372E-03
--1.584725E-02
-8.984498E-04
-3.486904E-02
-6.448722E-04
--2.420912E-02
-6.352276E-04
+1.485000E+01
+4.439790E+01
+8.440076E-02
+1.135203E-02
+8.198663E-02
+3.887429E-02
+1.358080E-01
+2.890416E-02
+-3.544823E-02
+9.843339E-04
+1.542072E-01
+8.228126E-03
+1.057111E-01
+3.758100E-03
+1.647870E-02
+4.827841E-03
+1.378297E-01
+1.566876E-02
+-4.676778E-02
+4.809366E-03
+1.966204E-02
+7.447981E-04
+-1.889258E-02
+6.841953E-04
+1.337703E-02
+1.250077E-03
+1.044684E-01
+6.969498E-03
+-1.177995E-02
+8.208715E-03
+1.940058E-04
+5.128759E-03
+-2.165868E-02
+1.335569E-03
+3.080886E-02
+4.544434E-04
+1.039856E-03
+1.209631E-03
+1.317068E-02
+1.469722E-03
+-6.432758E-02
+2.106736E-03
+-3.323023E-02
+4.513838E-03
+2.683700E-02
+1.146747E-03
+3.494912E-02
+1.006153E-03
+6.289525E-02
+3.700145E-03
diff --git a/tests/test_score_scatter_yn/settings.xml b/tests/test_score_scatter_yn/settings.xml
deleted file mode 100644
index 517637a59f..0000000000
--- a/tests/test_score_scatter_yn/settings.xml
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0"?>
-<settings>
-
-  <eigenvalue>
-    <batches>10</batches>
-    <inactive>5</inactive>
-    <particles>100</particles>
-  </eigenvalue>
-
-  <source>
-    <space type="box">
-      <parameters>
-        -160 -160 -183
-         160  160  183
-      </parameters>
-    </space>
-  </source>
-
-</settings>
diff --git a/tests/test_score_scatter_yn/tallies.xml b/tests/test_score_scatter_yn/tallies.xml
deleted file mode 100644
index 3c46c13d40..0000000000
--- a/tests/test_score_scatter_yn/tallies.xml
+++ /dev/null
@@ -1,15 +0,0 @@
-<?xml version="1.0"?>
-<tallies>
-
-  <tally id="1">
-    <filter type="cell" bins="21" />
-    <scores>scatter-0</scores>
-    <estimator>analog</estimator>
-  </tally>
-
-  <tally id="2">
-    <filter type="cell" bins="21" />
-    <scores>scatter-y4</scores>
-  </tally>
-
-</tallies>
diff --git a/tests/test_score_scatter_yn/test_score_scatter_yn.py b/tests/test_score_scatter_yn/test_score_scatter_yn.py
index 1777db993e..9e6900031f 100644
--- a/tests/test_score_scatter_yn/test_score_scatter_yn.py
+++ b/tests/test_score_scatter_yn/test_score_scatter_yn.py
@@ -1,10 +1,34 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
-from testing_harness import TestHarness
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness, PyAPITestHarness
+import openmc
+
+
+class ScoreScatterYNTestHarness(PyAPITestHarness):
+    def _build_inputs(self):
+        filt = openmc.Filter(type='cell', bins=(21, ))
+        t1 = openmc.Tally(tally_id=1)
+        t1.add_filter(filt)
+        t1.add_score('scatter-0')
+        t1.estimator = 'analog'
+        t2 = openmc.Tally(tally_id=2)
+        t2.add_filter(filt)
+        t2.add_score('scatter-y4')
+        self._input_set.tallies = openmc.TalliesFile()
+        self._input_set.tallies.add_tally(t1)
+        self._input_set.tallies.add_tally(t2)
+
+        super(ScoreScatterYNTestHarness, self)._build_inputs()
+
+    def _cleanup(self):
+        super(ScoreScatterYNTestHarness, self)._cleanup()
+        f = os.path.join(os.getcwd(), 'tallies.xml')
+        if os.path.exists(f): os.remove(f)
 
 
 if __name__ == '__main__':
-    harness = TestHarness('statepoint.10.*', True)
+    harness = ScoreScatterYNTestHarness('statepoint.10.*', True)
     harness.main()
diff --git a/tests/test_score_total/geometry.xml b/tests/test_score_total/geometry.xml
deleted file mode 100644
index f6f067aadd..0000000000
--- a/tests/test_score_total/geometry.xml
+++ /dev/null
@@ -1,181 +0,0 @@
-<?xml version="1.0"?>
-<geometry>
-
-  <surface id="1" type="z-cylinder" coeffs="0. 0. 0.41" />
-  <surface id="2" type="z-cylinder" coeffs="0. 0. 0.475" />
-  <surface id="3" type="z-cylinder" coeffs="0. 0. 0.56" />
-  <surface id="4" type="z-cylinder" coeffs="0. 0. 0.62" />
-  <surface id="5" type="z-cylinder" coeffs="0. 0. 187.6" />
-  <surface id="6" type="z-cylinder" coeffs="0. 0. 209.0" />
-  <surface id="7" type="z-cylinder" coeffs="0. 0. 229.0" />
-  <surface id="8" type="z-cylinder" coeffs="0. 0. 249.0" boundary="vacuum" />
-
-  <surface id="31" type="z-plane" coeffs="-229.0" boundary="vacuum" />
-  <surface id="32" type="z-plane" coeffs="-199.0" />
-  <surface id="33" type="z-plane" coeffs="-193.0" />
-  <surface id="34" type="z-plane" coeffs="-183.0" />
-  <surface id="35" type="z-plane" coeffs="0.0" />
-  <surface id="36" type="z-plane" coeffs="183.0" />
-  <surface id="37" type="z-plane" coeffs="203.0" />
-  <surface id="38" type="z-plane" coeffs="215.0" />
-  <surface id="39" type="z-plane" coeffs="223.0" boundary="vacuum" />
-
-  <!-- All geometry on base universe -->
-  <cell id="1"  fill="200"    region="  -6 34 -35" /> <!-- Lower core -->
-  <cell id="2"  fill="201"    region="  -6 35 -36" /> <!-- Upper core -->
-  <cell id="3"  material="8"  region="  -7 31 -32" /> <!-- Lower core plate region -->
-  <cell id="4"  material="9"  region="  -5 32 -33" /> <!-- Bottom nozzle region -->
-  <cell id="5"  material="12" region="  -5 33 -34" /> <!-- Bottom FA region -->
-  <cell id="6"  material="11" region="  -5 36 -37" /> <!-- Top FA region -->
-  <cell id="7"  material="10" region="  -5 37 -38" /> <!-- Top nozzle region -->
-  <cell id="8"  material="7"  region="  -7 38 -39" /> <!-- Upper plate region -->
-  <cell id="9"  material="4"  region="6 -7 32 -38" /> <!-- Downcomer -->
-  <cell id="10" material="5"  region="7 -8 31 -39" /> <!-- RPV -->
-  <cell id="11" material="6"  region="5 -6 32 -34" /> <!-- Bottom of radial reflector -->
-  <cell id="12" material="7"  region="5 -6 36 -38" /> <!-- Top of radial reflector -->
-
-  <!-- Fuel pin, cladding, cold water -->
-  <cell id="21" universe="1" material="1" region="-1"   />
-  <cell id="22" universe="1" material="2" region="1 -2" />
-  <cell id="23" universe="1" material="3" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="24" universe="2" material="3" region="-3"   />
-  <cell id="25" universe="2" material="2" region="3 -4" />
-  <cell id="26" universe="2" material="3" region="4"    />
-
-  <!-- Fuel pin, cladding, hot water -->
-  <cell id="27" universe="3" material="1" region="-1"   />
-  <cell id="28" universe="3" material="2" region="1 -2" />
-  <cell id="29" universe="3" material="4" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="30" universe="4" material="4" region="-3"   />
-  <cell id="31" universe="4" material="2" region="3 -4" />
-  <cell id="32" universe="4" material="4" region="4"    />
-
-  <!-- cell for water assembly (cold) -->
-  <cell id="50" universe="5" material="4" region="34 -35" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="60" universe="6" fill="100"   region="34 -35" />
-
-  <!-- cell for water assembly (hot) -->
-  <cell id="70" universe="7" material="3" region="35 -36" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="80" universe="8" fill="101"   region="35 -36" />
-
-  <!-- Fuel Assembly (Lower Half) -->
-  <lattice id="100">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-    </universes>
-  </lattice>
-
-  <!-- Fuel Assembly (Upper Half) -->
-  <lattice id="101">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Lower Half) -->
-  <lattice id="200">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Upper Half) -->
-  <lattice id="201">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-    </universes>
-  </lattice>
-
-</geometry>
diff --git a/tests/test_score_total/inputs_true.dat b/tests/test_score_total/inputs_true.dat
new file mode 100644
index 0000000000..975588a1ac
--- /dev/null
+++ b/tests/test_score_total/inputs_true.dat
@@ -0,0 +1 @@
+90633c6010148c10c363ed3b2e9de3213468c51dea6153dff4bb18eadc579041d967e4835023d10b6d8c42fe81017238d119f24cae754d0621698547464b16f3
\ No newline at end of file
diff --git a/tests/test_score_total/materials.xml b/tests/test_score_total/materials.xml
deleted file mode 100644
index 9c0b74f3f1..0000000000
--- a/tests/test_score_total/materials.xml
+++ /dev/null
@@ -1,272 +0,0 @@
-<?xml version="1.0"?>
-<materials>
-
-  <default_xs>71c</default_xs>
-
-  <!-- Fuel composition -->
-  <material id="1">
-    <density value="10.062" units="g/cm3" />
-    <nuclide name="U-234"   ao="4.9476e-6" />
-    <nuclide name="U-235"   ao="4.8218e-4" />
-    <nuclide name="U-236"   ao="9.0402e-5" />
-    <nuclide name="U-238"   ao="2.1504e-2" />
-    <nuclide name="Np-237"  ao="7.3733e-6" />
-    <nuclide name="Pu-238"  ao="1.5148e-6" />
-    <nuclide name="Pu-239"  ao="1.3955e-4" />
-    <nuclide name="Pu-240"  ao="3.4405e-5" />
-    <nuclide name="Pu-241"  ao="2.1439e-5" />
-    <nuclide name="Pu-242"  ao="3.7422e-6" />
-    <nuclide name="Am-241"  ao="4.5041e-7" />
-    <nuclide name="Am-242m" ao="9.2301e-9" />
-    <nuclide name="Am-243"  ao="4.7878e-7" />
-    <nuclide name="Cm-242"  ao="1.0485e-7" />
-    <nuclide name="Cm-243"  ao="1.4268e-9" />
-    <nuclide name="Cm-244"  ao="8.8756e-8" />
-    <nuclide name="Cm-245"  ao="3.5285e-9" />
-    <nuclide name="Mo-95"   ao="2.6497e-5" />
-    <nuclide name="Tc-99"   ao="3.2772e-5" />
-    <nuclide name="Ru-101"  ao="3.0742e-5" />
-    <nuclide name="Ru-103"  ao="2.3505e-6" />
-    <nuclide name="Ag-109"  ao="2.0009e-6" />
-    <nuclide name="Xe-135"  ao="1.0801e-8" />
-    <nuclide name="Cs-133"  ao="3.4612e-5" />
-    <nuclide name="Nd-143"  ao="2.6078e-5" />
-    <nuclide name="Nd-145"  ao="1.9898e-5" />
-    <nuclide name="Sm-147"  ao="1.6128e-6" />
-    <nuclide name="Sm-149"  ao="1.1627e-7" />
-    <nuclide name="Sm-150"  ao="7.1727e-6" />
-    <nuclide name="Sm-151"  ao="5.4947e-7" />
-    <nuclide name="Sm-152"  ao="3.0221e-6" />
-    <nuclide name="Eu-153"  ao="2.6209e-6" />
-    <nuclide name="Gd-155"  ao="1.5369e-9" />
-    <nuclide name="O-16"    ao="4.5737e-2" />
-  </material>
-
-  <!-- Cladding composition -->
-  <material id="2">
-    <density value="5.77" units="g/cm3" />
-    <nuclide name="Zr-90" ao="0.5145" />
-    <nuclide name="Zr-91" ao="0.1122" />
-    <nuclide name="Zr-92" ao="0.1715" />
-    <nuclide name="Zr-94" ao="0.1738" />
-    <nuclide name="Zr-96" ao="0.0280" />
-  </material>
-
-  <!-- Cold borated water -->
-  <material id="3">
-    <density value="0.07416" units="atom/b-cm" />
-    <nuclide name="H-1" ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Hot borated water -->
-  <material id="4">
-    <density value="0.06614" units="atom/b-cm" />
-    <nuclide name="H-1"  ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- RPV Composition -->
-  <material id="5">
-    <density value="7.9" units="g/cm3" />
-    <nuclide name="Fe-54"  wo="0.05437098" />
-    <nuclide name="Fe-56"  wo="0.88500663" />
-    <nuclide name="Fe-57"  wo="0.0208008" />
-    <nuclide name="Fe-58"  wo="0.00282159" />
-    <nuclide name="Ni-58"  wo="0.0067198" />
-    <nuclide name="Ni-60"  wo="0.0026776" />
-    <nuclide name="Ni-61"  wo="0.0001183" />
-    <nuclide name="Ni-62"  wo="0.0003835" />
-    <nuclide name="Ni-64"  wo="0.0001008" />
-    <nuclide name="Mn-55"  wo="0.01" />
-    <nuclide name="Mo-92"  wo="0.000849" />
-    <nuclide name="Mo-94"  wo="0.0005418" />
-    <nuclide name="Mo-95"  wo="0.0009438" />
-    <nuclide name="Mo-96"  wo="0.0010002" />
-    <nuclide name="Mo-97"  wo="0.0005796" />
-    <nuclide name="Mo-98"  wo="0.0014814" />
-    <nuclide name="Mo-100" wo="0.0006042" />
-    <nuclide name="Si-28"  wo="0.00367464" />
-    <nuclide name="Si-29"  wo="0.00019336" />
-    <nuclide name="Si-30"  wo="0.000132" />
-    <nuclide name="Cr-50"  wo="0.00010435" />
-    <nuclide name="Cr-52"  wo="0.002092475" />
-    <nuclide name="Cr-53"  wo="0.00024185" />
-    <nuclide name="Cr-54"  wo="6.1325e-05" />
-    <nuclide name="C-Nat"  wo="0.0025" />
-    <nuclide name="Cu-63"  wo="0.0013696" />
-    <nuclide name="Cu-65"  wo="0.0006304" />
-  </material>
-
-  <!-- Lower radial reflector -->
-  <material id="6">
-    <density value="4.32" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0095661" />
-    <nuclide name="O-16"  wo="0.0759107" />
-    <nuclide name="B-10"  wo="3.08409e-5" />
-    <nuclide name="B-11"  wo="1.40499e-4" />
-    <nuclide name="Fe-54" wo="0.035620772088" />
-    <nuclide name="Fe-56" wo="0.579805982228" />
-    <nuclide name="Fe-57" wo="0.01362750048" />
-    <nuclide name="Fe-58" wo="0.001848545204" />
-    <nuclide name="Ni-58" wo="0.055298376566" />
-    <nuclide name="Ni-60" wo="0.022034425592" />
-    <nuclide name="Ni-61" wo="0.000973510811" />
-    <nuclide name="Ni-62" wo="0.003155886695" />
-    <nuclide name="Ni-64" wo="0.000829500336" />
-    <nuclide name="Mn-55" wo="0.0182870" />
-    <nuclide name="Si-28" wo="0.00839976771" />
-    <nuclide name="Si-29" wo="0.00044199679" />
-    <nuclide name="Si-30" wo="0.0003017355" />
-    <nuclide name="Cr-50" wo="0.007251360806" />
-    <nuclide name="Cr-52" wo="0.145407678031" />
-    <nuclide name="Cr-53" wo="0.016806340306" />
-    <nuclide name="Cr-54" wo="0.004261520857" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Upper radial reflector / Top plate region -->
-  <material id="7">
-    <density value="4.28" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0086117" />
-    <nuclide name="O-16"  wo="0.0683369" />
-    <nuclide name="B-10"  wo="2.77638e-5" />
-    <nuclide name="B-11"  wo="1.26481e-4" />
-    <nuclide name="Fe-54" wo="0.035953677186" />
-    <nuclide name="Fe-56" wo="0.585224740891" />
-    <nuclide name="Fe-57" wo="0.01375486056" />
-    <nuclide name="Fe-58" wo="0.001865821363" />
-    <nuclide name="Ni-58" wo="0.055815129186" />
-    <nuclide name="Ni-60" wo="0.022240333032" />
-    <nuclide name="Ni-61" wo="0.000982608081" />
-    <nuclide name="Ni-62" wo="0.003185377845" />
-    <nuclide name="Ni-64" wo="0.000837251856" />
-    <nuclide name="Mn-55" wo="0.0184579" />
-    <nuclide name="Si-28" wo="0.00847831314" />
-    <nuclide name="Si-29" wo="0.00044612986" />
-    <nuclide name="Si-30" wo="0.000304557" />
-    <nuclide name="Cr-50" wo="0.00731912987" />
-    <nuclide name="Cr-52" wo="0.146766614995" />
-    <nuclide name="Cr-53" wo="0.01696340737" />
-    <nuclide name="Cr-54" wo="0.004301347765" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom plate region -->
-  <material id="8">
-    <density value="7.184" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0011505" />
-    <nuclide name="O-16"  wo="0.0091296" />
-    <nuclide name="B-10"  wo="3.70915e-6" />
-    <nuclide name="B-11"  wo="1.68974e-5" />
-    <nuclide name="Fe-54" wo="0.03855611055" />
-    <nuclide name="Fe-56" wo="0.627585036425" />
-    <nuclide name="Fe-57" wo="0.014750478" />
-    <nuclide name="Fe-58" wo="0.002000875025" />
-    <nuclide name="Ni-58" wo="0.059855207342" />
-    <nuclide name="Ni-60" wo="0.023850159704" />
-    <nuclide name="Ni-61" wo="0.001053732407" />
-    <nuclide name="Ni-62" wo="0.003415945715" />
-    <nuclide name="Ni-64" wo="0.000897854832" />
-    <nuclide name="Mn-55" wo="0.0197940" />
-    <nuclide name="Si-28" wo="0.00909197802" />
-    <nuclide name="Si-29" wo="0.00047842098" />
-    <nuclide name="Si-30" wo="0.000326601" />
-    <nuclide name="Cr-50" wo="0.007848910646" />
-    <nuclide name="Cr-52" wo="0.157390026871" />
-    <nuclide name="Cr-53" wo="0.018191270146" />
-    <nuclide name="Cr-54" wo="0.004612692337" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom nozzle region -->
-  <material id="9">
-    <density value="2.53" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0245014" />
-    <nuclide name="O-16"  wo="0.1944274" />
-    <nuclide name="B-10"  wo="7.89917e-5" />
-    <nuclide name="B-11"  wo="3.59854e-4" />
-    <nuclide name="Fe-54" wo="0.030411411144" />
-    <nuclide name="Fe-56" wo="0.495012237964" />
-    <nuclide name="Fe-57" wo="0.01163454624" />
-    <nuclide name="Fe-58" wo="0.001578204652" />
-    <nuclide name="Ni-58" wo="0.047211231662" />
-    <nuclide name="Ni-60" wo="0.018811987544" />
-    <nuclide name="Ni-61" wo="0.000831139127" />
-    <nuclide name="Ni-62" wo="0.002694352115" />
-    <nuclide name="Ni-64" wo="0.000708189552" />
-    <nuclide name="Mn-55" wo="0.0156126" />
-    <nuclide name="Si-28" wo="0.007171335558" />
-    <nuclide name="Si-29" wo="0.000377356542" />
-    <nuclide name="Si-30" wo="0.0002576079" />
-    <nuclide name="Cr-50" wo="0.006190885148" />
-    <nuclide name="Cr-52" wo="0.124142524198" />
-    <nuclide name="Cr-53" wo="0.014348496148" />
-    <nuclide name="Cr-54" wo="0.003638294506" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top nozzle region -->
-  <material id="10">
-    <density value="1.746" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0358870" />
-    <nuclide name="O-16"  wo="0.2847761" />
-    <nuclide name="B-10"  wo="1.15699e-4" />
-    <nuclide name="B-11"  wo="5.27075e-4" />
-    <nuclide name="Fe-54" wo="0.02644016154" />
-    <nuclide name="Fe-56" wo="0.43037146399" />
-    <nuclide name="Fe-57" wo="0.0101152584" />
-    <nuclide name="Fe-58" wo="0.00137211607" />
-    <nuclide name="Ni-58" wo="0.04104621835" />
-    <nuclide name="Ni-60" wo="0.0163554502" />
-    <nuclide name="Ni-61" wo="0.000722605975" />
-    <nuclide name="Ni-62" wo="0.002342513875" />
-    <nuclide name="Ni-64" wo="0.0006157116" />
-    <nuclide name="Mn-55" wo="0.0135739" />
-    <nuclide name="Si-28" wo="0.006234853554" />
-    <nuclide name="Si-29" wo="0.000328078746" />
-    <nuclide name="Si-30" wo="0.0002239677" />
-    <nuclide name="Cr-50" wo="0.005382452306" />
-    <nuclide name="Cr-52" wo="0.107931450781" />
-    <nuclide name="Cr-53" wo="0.012474806806" />
-    <nuclide name="Cr-54" wo="0.003163190107" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top of Fuel Assemblies -->
-  <material id="11">
-    <density value="3.044" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0162913" />
-    <nuclide name="O-16"  wo="0.1292776" />
-    <nuclide name="B-10"  wo="5.25228e-5" />
-    <nuclide name="B-11"  wo="2.39272e-4" />
-    <nuclide name="Zr-90" wo="0.43313403903" />
-    <nuclide name="Zr-91" wo="0.09549277374" />
-    <nuclide name="Zr-92" wo="0.14759527104" />
-    <nuclide name="Zr-94" wo="0.15280552077" />
-    <nuclide name="Zr-96" wo="0.02511169542" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom of Fuel Assemblies -->
-  <material id="12">
-    <density value="1.762" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0292856" />
-    <nuclide name="O-16"  wo="0.2323919" />
-    <nuclide name="B-10"  wo="9.44159e-5" />
-    <nuclide name="B-11"  wo="4.30120e-4" />
-    <nuclide name="Zr-90" wo="0.3741373658" />
-    <nuclide name="Zr-91" wo="0.0824858164" />
-    <nuclide name="Zr-92" wo="0.1274914944" />
-    <nuclide name="Zr-94" wo="0.1319920622" />
-    <nuclide name="Zr-96" wo="0.0216912612" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-</materials>
diff --git a/tests/test_score_total/results_true.dat b/tests/test_score_total/results_true.dat
index e782fd9d04..9b8a06f807 100644
--- a/tests/test_score_total/results_true.dat
+++ b/tests/test_score_total/results_true.dat
@@ -1,29 +1,29 @@
 k-combined:
-1.005983E+00 2.248579E-02
+9.903196E-01 4.279617E-02
 tally 1:
 0.000000E+00
 0.000000E+00
-1.423676E+01
-4.330937E+01
-2.914798E+00
-1.831649E+00
-4.088282E+01
-3.662539E+02
+1.767552E+01
+6.295417E+01
+3.863588E+00
+3.013300E+00
+5.356594E+01
+5.839391E+02
 tally 2:
 0.000000E+00
 0.000000E+00
-1.372000E+01
-4.018980E+01
-3.200000E+00
-2.342600E+00
-4.104000E+01
-3.668254E+02
+1.739000E+01
+6.083290E+01
+4.160000E+00
+3.501000E+00
+5.213000E+01
+5.552351E+02
 tally 3:
 0.000000E+00
 0.000000E+00
-1.372000E+01
-4.018980E+01
-3.200000E+00
-2.342600E+00
-4.104000E+01
-3.668254E+02
+1.739000E+01
+6.083290E+01
+4.160000E+00
+3.501000E+00
+5.213000E+01
+5.552351E+02
diff --git a/tests/test_score_total/settings.xml b/tests/test_score_total/settings.xml
deleted file mode 100644
index 517637a59f..0000000000
--- a/tests/test_score_total/settings.xml
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0"?>
-<settings>
-
-  <eigenvalue>
-    <batches>10</batches>
-    <inactive>5</inactive>
-    <particles>100</particles>
-  </eigenvalue>
-
-  <source>
-    <space type="box">
-      <parameters>
-        -160 -160 -183
-         160  160  183
-      </parameters>
-    </space>
-  </source>
-
-</settings>
diff --git a/tests/test_score_total/tallies.xml b/tests/test_score_total/tallies.xml
deleted file mode 100644
index 02286f96c7..0000000000
--- a/tests/test_score_total/tallies.xml
+++ /dev/null
@@ -1,21 +0,0 @@
-<?xml version="1.0"?>
-<tallies>
-
-  <tally id="1">
-    <filter type="cell" bins="10 21 22 23" />
-    <scores>total</scores>
-  </tally>
-
-  <tally id="2">
-    <filter type="cell" bins="10 21 22 23" />
-    <scores>total</scores>
-    <estimator>analog</estimator>
-  </tally>
-
-  <tally id="3">
-    <filter type="cell" bins="10 21 22 23" />
-    <scores>total</scores>
-    <estimator>collision</estimator>
-  </tally>
-
-</tallies>
diff --git a/tests/test_score_total/test_score_total.py b/tests/test_score_total/test_score_total.py
index 1777db993e..c6f3f335fc 100644
--- a/tests/test_score_total/test_score_total.py
+++ b/tests/test_score_total/test_score_total.py
@@ -1,10 +1,32 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
-from testing_harness import TestHarness
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness, PyAPITestHarness
+import openmc
+
+
+class ScoreTotalTestHarness(PyAPITestHarness):
+    def _build_inputs(self):
+        filt = openmc.Filter(type='cell', bins=(10, 21, 22, 23))
+        tallies = [openmc.Tally(tally_id=i) for i in range(1, 4)]
+        [t.add_filter(filt) for t in tallies]
+        [t.add_score('total') for t in tallies]
+        tallies[0].estimator = 'tracklength'
+        tallies[1].estimator = 'analog'
+        tallies[2].estimator = 'collision'
+        self._input_set.tallies = openmc.TalliesFile()
+        [self._input_set.tallies.add_tally(t) for t in tallies]
+
+        super(ScoreTotalTestHarness, self)._build_inputs()
+
+    def _cleanup(self):
+        super(ScoreTotalTestHarness, self)._cleanup()
+        f = os.path.join(os.getcwd(), 'tallies.xml')
+        if os.path.exists(f): os.remove(f)
 
 
 if __name__ == '__main__':
-    harness = TestHarness('statepoint.10.*', True)
+    harness = ScoreTotalTestHarness('statepoint.10.*', True)
     harness.main()
diff --git a/tests/test_score_total_yn/geometry.xml b/tests/test_score_total_yn/geometry.xml
deleted file mode 100644
index f6f067aadd..0000000000
--- a/tests/test_score_total_yn/geometry.xml
+++ /dev/null
@@ -1,181 +0,0 @@
-<?xml version="1.0"?>
-<geometry>
-
-  <surface id="1" type="z-cylinder" coeffs="0. 0. 0.41" />
-  <surface id="2" type="z-cylinder" coeffs="0. 0. 0.475" />
-  <surface id="3" type="z-cylinder" coeffs="0. 0. 0.56" />
-  <surface id="4" type="z-cylinder" coeffs="0. 0. 0.62" />
-  <surface id="5" type="z-cylinder" coeffs="0. 0. 187.6" />
-  <surface id="6" type="z-cylinder" coeffs="0. 0. 209.0" />
-  <surface id="7" type="z-cylinder" coeffs="0. 0. 229.0" />
-  <surface id="8" type="z-cylinder" coeffs="0. 0. 249.0" boundary="vacuum" />
-
-  <surface id="31" type="z-plane" coeffs="-229.0" boundary="vacuum" />
-  <surface id="32" type="z-plane" coeffs="-199.0" />
-  <surface id="33" type="z-plane" coeffs="-193.0" />
-  <surface id="34" type="z-plane" coeffs="-183.0" />
-  <surface id="35" type="z-plane" coeffs="0.0" />
-  <surface id="36" type="z-plane" coeffs="183.0" />
-  <surface id="37" type="z-plane" coeffs="203.0" />
-  <surface id="38" type="z-plane" coeffs="215.0" />
-  <surface id="39" type="z-plane" coeffs="223.0" boundary="vacuum" />
-
-  <!-- All geometry on base universe -->
-  <cell id="1"  fill="200"    region="  -6 34 -35" /> <!-- Lower core -->
-  <cell id="2"  fill="201"    region="  -6 35 -36" /> <!-- Upper core -->
-  <cell id="3"  material="8"  region="  -7 31 -32" /> <!-- Lower core plate region -->
-  <cell id="4"  material="9"  region="  -5 32 -33" /> <!-- Bottom nozzle region -->
-  <cell id="5"  material="12" region="  -5 33 -34" /> <!-- Bottom FA region -->
-  <cell id="6"  material="11" region="  -5 36 -37" /> <!-- Top FA region -->
-  <cell id="7"  material="10" region="  -5 37 -38" /> <!-- Top nozzle region -->
-  <cell id="8"  material="7"  region="  -7 38 -39" /> <!-- Upper plate region -->
-  <cell id="9"  material="4"  region="6 -7 32 -38" /> <!-- Downcomer -->
-  <cell id="10" material="5"  region="7 -8 31 -39" /> <!-- RPV -->
-  <cell id="11" material="6"  region="5 -6 32 -34" /> <!-- Bottom of radial reflector -->
-  <cell id="12" material="7"  region="5 -6 36 -38" /> <!-- Top of radial reflector -->
-
-  <!-- Fuel pin, cladding, cold water -->
-  <cell id="21" universe="1" material="1" region="-1"   />
-  <cell id="22" universe="1" material="2" region="1 -2" />
-  <cell id="23" universe="1" material="3" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="24" universe="2" material="3" region="-3"   />
-  <cell id="25" universe="2" material="2" region="3 -4" />
-  <cell id="26" universe="2" material="3" region="4"    />
-
-  <!-- Fuel pin, cladding, hot water -->
-  <cell id="27" universe="3" material="1" region="-1"   />
-  <cell id="28" universe="3" material="2" region="1 -2" />
-  <cell id="29" universe="3" material="4" region="2"    />
-
-  <!-- Instrumentation guide tube -->
-  <cell id="30" universe="4" material="4" region="-3"   />
-  <cell id="31" universe="4" material="2" region="3 -4" />
-  <cell id="32" universe="4" material="4" region="4"    />
-
-  <!-- cell for water assembly (cold) -->
-  <cell id="50" universe="5" material="4" region="34 -35" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="60" universe="6" fill="100"   region="34 -35" />
-
-  <!-- cell for water assembly (hot) -->
-  <cell id="70" universe="7" material="3" region="35 -36" />
-
-  <!-- containing cell for fuel assembly -->
-  <cell id="80" universe="8" fill="101"   region="35 -36" />
-
-  <!-- Fuel Assembly (Lower Half) -->
-  <lattice id="100">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 2 1 1 1 1 1 1 1 1 1 2 1 1 1
-      1 1 1 1 1 2 1 1 2 1 1 2 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-    </universes>
-  </lattice>
-
-  <!-- Fuel Assembly (Upper Half) -->
-  <lattice id="101">
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 4 3 3 4 3 3 4 3 3 4 3 3 4 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 4 3 3 3 3 3 3 3 3 3 4 3 3 3
-      3 3 3 3 3 4 3 3 4 3 3 4 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-      3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Lower Half) -->
-  <lattice id="200">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5
-      5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5
-      5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5
-      5 5 5 5 5 5 5 6 6 6 6 6 6 6 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-      5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
-    </universes>
-  </lattice>
-
-  <!-- Core Lattice (Upper Half) -->
-  <lattice id="201">
-    <dimension>21 21</dimension>
-    <lower_left>-224.91 -224.91</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7
-      7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
-      7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
-      7 7 7 7 7 7 7 8 8 8 8 8 8 8 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-      7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
-    </universes>
-  </lattice>
-
-</geometry>
diff --git a/tests/test_score_total_yn/inputs_true.dat b/tests/test_score_total_yn/inputs_true.dat
new file mode 100644
index 0000000000..72173a0319
--- /dev/null
+++ b/tests/test_score_total_yn/inputs_true.dat
@@ -0,0 +1 @@
+def382a2f9efec93baf521911ab89e0d73ceadba486f9bb306e9cf82ffc1c67b72498c153519e05b516ff54db431430b2b25b80675961697e19774455711a5f8
\ No newline at end of file
diff --git a/tests/test_score_total_yn/materials.xml b/tests/test_score_total_yn/materials.xml
deleted file mode 100644
index 9c0b74f3f1..0000000000
--- a/tests/test_score_total_yn/materials.xml
+++ /dev/null
@@ -1,272 +0,0 @@
-<?xml version="1.0"?>
-<materials>
-
-  <default_xs>71c</default_xs>
-
-  <!-- Fuel composition -->
-  <material id="1">
-    <density value="10.062" units="g/cm3" />
-    <nuclide name="U-234"   ao="4.9476e-6" />
-    <nuclide name="U-235"   ao="4.8218e-4" />
-    <nuclide name="U-236"   ao="9.0402e-5" />
-    <nuclide name="U-238"   ao="2.1504e-2" />
-    <nuclide name="Np-237"  ao="7.3733e-6" />
-    <nuclide name="Pu-238"  ao="1.5148e-6" />
-    <nuclide name="Pu-239"  ao="1.3955e-4" />
-    <nuclide name="Pu-240"  ao="3.4405e-5" />
-    <nuclide name="Pu-241"  ao="2.1439e-5" />
-    <nuclide name="Pu-242"  ao="3.7422e-6" />
-    <nuclide name="Am-241"  ao="4.5041e-7" />
-    <nuclide name="Am-242m" ao="9.2301e-9" />
-    <nuclide name="Am-243"  ao="4.7878e-7" />
-    <nuclide name="Cm-242"  ao="1.0485e-7" />
-    <nuclide name="Cm-243"  ao="1.4268e-9" />
-    <nuclide name="Cm-244"  ao="8.8756e-8" />
-    <nuclide name="Cm-245"  ao="3.5285e-9" />
-    <nuclide name="Mo-95"   ao="2.6497e-5" />
-    <nuclide name="Tc-99"   ao="3.2772e-5" />
-    <nuclide name="Ru-101"  ao="3.0742e-5" />
-    <nuclide name="Ru-103"  ao="2.3505e-6" />
-    <nuclide name="Ag-109"  ao="2.0009e-6" />
-    <nuclide name="Xe-135"  ao="1.0801e-8" />
-    <nuclide name="Cs-133"  ao="3.4612e-5" />
-    <nuclide name="Nd-143"  ao="2.6078e-5" />
-    <nuclide name="Nd-145"  ao="1.9898e-5" />
-    <nuclide name="Sm-147"  ao="1.6128e-6" />
-    <nuclide name="Sm-149"  ao="1.1627e-7" />
-    <nuclide name="Sm-150"  ao="7.1727e-6" />
-    <nuclide name="Sm-151"  ao="5.4947e-7" />
-    <nuclide name="Sm-152"  ao="3.0221e-6" />
-    <nuclide name="Eu-153"  ao="2.6209e-6" />
-    <nuclide name="Gd-155"  ao="1.5369e-9" />
-    <nuclide name="O-16"    ao="4.5737e-2" />
-  </material>
-
-  <!-- Cladding composition -->
-  <material id="2">
-    <density value="5.77" units="g/cm3" />
-    <nuclide name="Zr-90" ao="0.5145" />
-    <nuclide name="Zr-91" ao="0.1122" />
-    <nuclide name="Zr-92" ao="0.1715" />
-    <nuclide name="Zr-94" ao="0.1738" />
-    <nuclide name="Zr-96" ao="0.0280" />
-  </material>
-
-  <!-- Cold borated water -->
-  <material id="3">
-    <density value="0.07416" units="atom/b-cm" />
-    <nuclide name="H-1" ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Hot borated water -->
-  <material id="4">
-    <density value="0.06614" units="atom/b-cm" />
-    <nuclide name="H-1"  ao="2.0" />
-    <nuclide name="O-16" ao="1.0" />
-    <nuclide name="B-10" ao="6.490e-4" />
-    <nuclide name="B-11" ao="2.689e-3" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- RPV Composition -->
-  <material id="5">
-    <density value="7.9" units="g/cm3" />
-    <nuclide name="Fe-54"  wo="0.05437098" />
-    <nuclide name="Fe-56"  wo="0.88500663" />
-    <nuclide name="Fe-57"  wo="0.0208008" />
-    <nuclide name="Fe-58"  wo="0.00282159" />
-    <nuclide name="Ni-58"  wo="0.0067198" />
-    <nuclide name="Ni-60"  wo="0.0026776" />
-    <nuclide name="Ni-61"  wo="0.0001183" />
-    <nuclide name="Ni-62"  wo="0.0003835" />
-    <nuclide name="Ni-64"  wo="0.0001008" />
-    <nuclide name="Mn-55"  wo="0.01" />
-    <nuclide name="Mo-92"  wo="0.000849" />
-    <nuclide name="Mo-94"  wo="0.0005418" />
-    <nuclide name="Mo-95"  wo="0.0009438" />
-    <nuclide name="Mo-96"  wo="0.0010002" />
-    <nuclide name="Mo-97"  wo="0.0005796" />
-    <nuclide name="Mo-98"  wo="0.0014814" />
-    <nuclide name="Mo-100" wo="0.0006042" />
-    <nuclide name="Si-28"  wo="0.00367464" />
-    <nuclide name="Si-29"  wo="0.00019336" />
-    <nuclide name="Si-30"  wo="0.000132" />
-    <nuclide name="Cr-50"  wo="0.00010435" />
-    <nuclide name="Cr-52"  wo="0.002092475" />
-    <nuclide name="Cr-53"  wo="0.00024185" />
-    <nuclide name="Cr-54"  wo="6.1325e-05" />
-    <nuclide name="C-Nat"  wo="0.0025" />
-    <nuclide name="Cu-63"  wo="0.0013696" />
-    <nuclide name="Cu-65"  wo="0.0006304" />
-  </material>
-
-  <!-- Lower radial reflector -->
-  <material id="6">
-    <density value="4.32" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0095661" />
-    <nuclide name="O-16"  wo="0.0759107" />
-    <nuclide name="B-10"  wo="3.08409e-5" />
-    <nuclide name="B-11"  wo="1.40499e-4" />
-    <nuclide name="Fe-54" wo="0.035620772088" />
-    <nuclide name="Fe-56" wo="0.579805982228" />
-    <nuclide name="Fe-57" wo="0.01362750048" />
-    <nuclide name="Fe-58" wo="0.001848545204" />
-    <nuclide name="Ni-58" wo="0.055298376566" />
-    <nuclide name="Ni-60" wo="0.022034425592" />
-    <nuclide name="Ni-61" wo="0.000973510811" />
-    <nuclide name="Ni-62" wo="0.003155886695" />
-    <nuclide name="Ni-64" wo="0.000829500336" />
-    <nuclide name="Mn-55" wo="0.0182870" />
-    <nuclide name="Si-28" wo="0.00839976771" />
-    <nuclide name="Si-29" wo="0.00044199679" />
-    <nuclide name="Si-30" wo="0.0003017355" />
-    <nuclide name="Cr-50" wo="0.007251360806" />
-    <nuclide name="Cr-52" wo="0.145407678031" />
-    <nuclide name="Cr-53" wo="0.016806340306" />
-    <nuclide name="Cr-54" wo="0.004261520857" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Upper radial reflector / Top plate region -->
-  <material id="7">
-    <density value="4.28" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0086117" />
-    <nuclide name="O-16"  wo="0.0683369" />
-    <nuclide name="B-10"  wo="2.77638e-5" />
-    <nuclide name="B-11"  wo="1.26481e-4" />
-    <nuclide name="Fe-54" wo="0.035953677186" />
-    <nuclide name="Fe-56" wo="0.585224740891" />
-    <nuclide name="Fe-57" wo="0.01375486056" />
-    <nuclide name="Fe-58" wo="0.001865821363" />
-    <nuclide name="Ni-58" wo="0.055815129186" />
-    <nuclide name="Ni-60" wo="0.022240333032" />
-    <nuclide name="Ni-61" wo="0.000982608081" />
-    <nuclide name="Ni-62" wo="0.003185377845" />
-    <nuclide name="Ni-64" wo="0.000837251856" />
-    <nuclide name="Mn-55" wo="0.0184579" />
-    <nuclide name="Si-28" wo="0.00847831314" />
-    <nuclide name="Si-29" wo="0.00044612986" />
-    <nuclide name="Si-30" wo="0.000304557" />
-    <nuclide name="Cr-50" wo="0.00731912987" />
-    <nuclide name="Cr-52" wo="0.146766614995" />
-    <nuclide name="Cr-53" wo="0.01696340737" />
-    <nuclide name="Cr-54" wo="0.004301347765" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom plate region -->
-  <material id="8">
-    <density value="7.184" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0011505" />
-    <nuclide name="O-16"  wo="0.0091296" />
-    <nuclide name="B-10"  wo="3.70915e-6" />
-    <nuclide name="B-11"  wo="1.68974e-5" />
-    <nuclide name="Fe-54" wo="0.03855611055" />
-    <nuclide name="Fe-56" wo="0.627585036425" />
-    <nuclide name="Fe-57" wo="0.014750478" />
-    <nuclide name="Fe-58" wo="0.002000875025" />
-    <nuclide name="Ni-58" wo="0.059855207342" />
-    <nuclide name="Ni-60" wo="0.023850159704" />
-    <nuclide name="Ni-61" wo="0.001053732407" />
-    <nuclide name="Ni-62" wo="0.003415945715" />
-    <nuclide name="Ni-64" wo="0.000897854832" />
-    <nuclide name="Mn-55" wo="0.0197940" />
-    <nuclide name="Si-28" wo="0.00909197802" />
-    <nuclide name="Si-29" wo="0.00047842098" />
-    <nuclide name="Si-30" wo="0.000326601" />
-    <nuclide name="Cr-50" wo="0.007848910646" />
-    <nuclide name="Cr-52" wo="0.157390026871" />
-    <nuclide name="Cr-53" wo="0.018191270146" />
-    <nuclide name="Cr-54" wo="0.004612692337" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom nozzle region -->
-  <material id="9">
-    <density value="2.53" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0245014" />
-    <nuclide name="O-16"  wo="0.1944274" />
-    <nuclide name="B-10"  wo="7.89917e-5" />
-    <nuclide name="B-11"  wo="3.59854e-4" />
-    <nuclide name="Fe-54" wo="0.030411411144" />
-    <nuclide name="Fe-56" wo="0.495012237964" />
-    <nuclide name="Fe-57" wo="0.01163454624" />
-    <nuclide name="Fe-58" wo="0.001578204652" />
-    <nuclide name="Ni-58" wo="0.047211231662" />
-    <nuclide name="Ni-60" wo="0.018811987544" />
-    <nuclide name="Ni-61" wo="0.000831139127" />
-    <nuclide name="Ni-62" wo="0.002694352115" />
-    <nuclide name="Ni-64" wo="0.000708189552" />
-    <nuclide name="Mn-55" wo="0.0156126" />
-    <nuclide name="Si-28" wo="0.007171335558" />
-    <nuclide name="Si-29" wo="0.000377356542" />
-    <nuclide name="Si-30" wo="0.0002576079" />
-    <nuclide name="Cr-50" wo="0.006190885148" />
-    <nuclide name="Cr-52" wo="0.124142524198" />
-    <nuclide name="Cr-53" wo="0.014348496148" />
-    <nuclide name="Cr-54" wo="0.003638294506" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top nozzle region -->
-  <material id="10">
-    <density value="1.746" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0358870" />
-    <nuclide name="O-16"  wo="0.2847761" />
-    <nuclide name="B-10"  wo="1.15699e-4" />
-    <nuclide name="B-11"  wo="5.27075e-4" />
-    <nuclide name="Fe-54" wo="0.02644016154" />
-    <nuclide name="Fe-56" wo="0.43037146399" />
-    <nuclide name="Fe-57" wo="0.0101152584" />
-    <nuclide name="Fe-58" wo="0.00137211607" />
-    <nuclide name="Ni-58" wo="0.04104621835" />
-    <nuclide name="Ni-60" wo="0.0163554502" />
-    <nuclide name="Ni-61" wo="0.000722605975" />
-    <nuclide name="Ni-62" wo="0.002342513875" />
-    <nuclide name="Ni-64" wo="0.0006157116" />
-    <nuclide name="Mn-55" wo="0.0135739" />
-    <nuclide name="Si-28" wo="0.006234853554" />
-    <nuclide name="Si-29" wo="0.000328078746" />
-    <nuclide name="Si-30" wo="0.0002239677" />
-    <nuclide name="Cr-50" wo="0.005382452306" />
-    <nuclide name="Cr-52" wo="0.107931450781" />
-    <nuclide name="Cr-53" wo="0.012474806806" />
-    <nuclide name="Cr-54" wo="0.003163190107" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Top of Fuel Assemblies -->
-  <material id="11">
-    <density value="3.044" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0162913" />
-    <nuclide name="O-16"  wo="0.1292776" />
-    <nuclide name="B-10"  wo="5.25228e-5" />
-    <nuclide name="B-11"  wo="2.39272e-4" />
-    <nuclide name="Zr-90" wo="0.43313403903" />
-    <nuclide name="Zr-91" wo="0.09549277374" />
-    <nuclide name="Zr-92" wo="0.14759527104" />
-    <nuclide name="Zr-94" wo="0.15280552077" />
-    <nuclide name="Zr-96" wo="0.02511169542" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-  <!-- Bottom of Fuel Assemblies -->
-  <material id="12">
-    <density value="1.762" units="g/cm3" />
-    <nuclide name="H-1"   wo="0.0292856" />
-    <nuclide name="O-16"  wo="0.2323919" />
-    <nuclide name="B-10"  wo="9.44159e-5" />
-    <nuclide name="B-11"  wo="4.30120e-4" />
-    <nuclide name="Zr-90" wo="0.3741373658" />
-    <nuclide name="Zr-91" wo="0.0824858164" />
-    <nuclide name="Zr-92" wo="0.1274914944" />
-    <nuclide name="Zr-94" wo="0.1319920622" />
-    <nuclide name="Zr-96" wo="0.0216912612" />
-    <sab name="HH2O" xs="71t" />
-  </material>
-
-</materials>
diff --git a/tests/test_score_total_yn/results_true.dat b/tests/test_score_total_yn/results_true.dat
index 28a4b1627e..a64aa49cc3 100644
--- a/tests/test_score_total_yn/results_true.dat
+++ b/tests/test_score_total_yn/results_true.dat
@@ -1,14 +1,14 @@
 k-combined:
-1.005983E+00 2.248579E-02
+9.903196E-01 4.279617E-02
 tally 1:
 0.000000E+00
 0.000000E+00
-1.423676E+01
-4.330937E+01
-2.914798E+00
-1.831649E+00
-4.088282E+01
-3.662539E+02
+1.767552E+01
+6.295417E+01
+3.863588E+00
+3.013300E+00
+5.356594E+01
+5.839391E+02
 tally 2:
 0.000000E+00
 0.000000E+00
@@ -110,106 +110,106 @@ tally 2:
 0.000000E+00
 0.000000E+00
 0.000000E+00
-7.812543E-01
-1.349265E-01
--7.005988E-03
-2.198486E-04
-3.237937E-02
-7.569491E-04
--3.865436E-04
-4.048167E-04
--1.003877E-02
-3.195619E-04
-3.738815E-03
-3.506174E-04
--2.549288E-02
-3.086810E-04
-1.693002E-02
-1.255885E-04
-3.059341E-03
-1.971678E-04
-9.247344E-03
-2.402855E-04
-6.618469E-04
-1.639025E-04
-1.992953E-02
-1.365376E-04
-3.262256E-03
-1.341040E-05
-2.864166E-03
-4.394787E-05
-1.494351E-03
-1.001007E-04
--1.091424E-02
-1.221030E-04
-9.875992E-03
-1.141979E-04
-1.263647E-02
-2.400023E-04
--2.944398E-03
-1.246417E-04
-1.970051E-03
-1.600160E-04
-6.148931E-03
-4.774182E-05
-1.107728E-02
-1.095420E-04
-1.382599E-02
-1.537793E-04
--1.296297E-02
-1.392028E-04
--1.479385E-02
-1.650074E-04
-1.423676E+01
-4.330937E+01
--2.802155E-01
-3.016146E-02
--8.009314E-02
-4.251899E-02
--7.383773E-02
-1.547362E-02
--1.274422E-01
-2.290306E-02
-1.370426E-01
-1.002935E-02
--2.607280E-01
-3.414307E-02
-1.497421E-02
-2.944540E-03
--2.866477E-02
-9.113662E-03
--3.949118E-02
-4.437767E-03
-2.283116E-01
-1.792907E-02
-1.334103E-01
-1.587762E-02
--3.139096E-01
-2.330713E-02
-1.025884E-03
-5.754195E-03
-1.099489E-01
-1.861634E-02
--7.863729E-02
-2.276108E-02
-1.219111E-01
-1.363203E-02
--1.261893E-01
-1.937908E-02
--1.995428E-01
-1.383344E-02
-8.803472E-02
-3.742219E-03
-1.501143E-01
-1.288322E-02
-4.522115E-02
-8.283014E-03
-1.113588E-01
-8.523967E-03
--1.820582E-01
-1.648932E-02
--1.121108E-01
-1.059879E-02
+9.780506E-01
+1.942072E-01
+4.170415E-02
+7.581469E-04
+-2.419728E-03
+6.296241E-04
+8.163997E-03
+4.785197E-04
+3.971909E-03
+1.363304E-04
+-1.585497E-02
+1.295251E-04
+-7.029875E-02
+1.208194E-03
+1.524070E-02
+2.828843E-04
+-2.141105E-02
+2.953327E-04
+2.147623E-02
+2.390414E-04
+5.592040E-04
+1.720605E-04
+-3.022066E-03
+1.843720E-04
+1.489821E-02
+9.193290E-05
+1.354668E-02
+2.551940E-04
+-5.692690E-04
+3.013453E-04
+-2.324582E-02
+2.170615E-04
+1.883012E-02
+1.045949E-04
+3.997107E-03
+1.674058E-04
+1.616443E-02
+2.046286E-04
+-1.625747E-02
+1.851351E-04
+1.120209E-02
+2.028649E-04
+-4.240284E-03
+4.019011E-05
+1.535379E-02
+9.872559E-05
+8.973926E-03
+1.448680E-04
+-3.933227E-03
+4.305328E-04
+1.767552E+01
+6.295417E+01
+1.458308E-01
+8.239551E-03
+1.976485E-01
+7.360520E-02
+2.647182E-01
+5.347815E-02
+1.828025E-01
+1.840743E-02
+-1.865994E-01
+2.843407E-02
+-6.438995E-02
+8.898045E-03
+1.416445E-01
+3.839856E-02
+-3.298894E-01
+2.672141E-02
+1.462639E-01
+1.225250E-02
+-6.410138E-02
+3.766615E-02
+-4.701705E-02
+1.968428E-03
+2.953056E-02
+2.358647E-02
+1.717672E-01
+5.877351E-02
+1.927497E-02
+1.358953E-02
+-1.708870E-01
+1.502033E-02
+4.453803E-02
+1.622532E-02
+2.076143E-02
+1.850686E-03
+1.111325E-01
+8.415150E-03
+-1.249594E-01
+7.491280E-03
+1.381757E-02
+1.537264E-02
+7.286234E-03
+9.057874E-03
+3.162973E-01
+3.303388E-02
+-1.012773E-01
+8.345375E-03
+-5.238963E-02
+3.920421E-02
 0.000000E+00
 0.000000E+00
 0.000000E+00
@@ -260,56 +260,56 @@ tally 2:
 0.000000E+00
 0.000000E+00
 0.000000E+00
-2.914798E+00
-1.831649E+00
--3.213884E-02
-1.391026E-03
--1.124311E-02
-2.059984E-03
--1.372399E-02
-2.990198E-03
--6.931800E-03
-1.073303E-03
--5.448993E-03
-3.542504E-04
--7.264172E-02
-1.742045E-03
-1.526380E-02
-5.962297E-04
-1.576474E-02
-5.335071E-04
-2.028206E-02
-2.915489E-04
-4.014298E-02
-4.285950E-04
-8.228146E-03
-6.388002E-04
--8.183952E-02
-2.031634E-03
-1.014523E-02
-1.159653E-03
-9.321030E-03
-7.480844E-04
--3.156017E-02
-2.064357E-03
-3.606483E-02
-4.060244E-04
--3.866234E-02
-1.046100E-03
--5.723297E-02
-1.042437E-03
-2.894838E-02
-2.922848E-04
--1.529225E-03
-2.472179E-04
-9.484410E-03
-4.172637E-04
--4.442548E-04
-2.518508E-04
--3.065480E-02
-3.571846E-04
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 0.000000E+00
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@@ -360,56 +360,56 @@ tally 2:
 0.000000E+00
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 tally 3:
 0.000000E+00
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@@ -511,106 +511,106 @@ tally 3:
 0.000000E+00
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@@ -661,56 +661,56 @@ tally 3:
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 tally 4:
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@@ -912,106 +912,106 @@ tally 4:
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+1.000847E-02
+3.233262E-02
+-7.570231E-02
+4.626536E-03
+1.489091E-01
+1.159345E-02
+-2.236285E-01
+1.480084E-02
+2.461305E-01
+1.643844E-02
+-1.773523E-02
+1.626036E-03
+6.570774E-02
+1.069893E-02
 0.000000E+00
 0.000000E+00
 0.000000E+00
@@ -1062,56 +1062,56 @@ tally 4:
 0.000000E+00
 0.000000E+00
 0.000000E+00
-3.200000E+00
-2.342600E+00
--2.991985E-01
-1.868406E-02
-4.460301E-02
-4.132113E-03
--2.190630E-02
-1.023889E-02
--3.265764E-02
-2.060374E-03
-3.491521E-02
-4.785957E-04
--3.623623E-02
-5.929111E-04
--4.962268E-02
-1.814245E-03
-1.406439E-01
-1.174445E-02
--9.433277E-02
-5.036897E-03
-9.058176E-02
-3.871598E-03
--1.409089E-01
-6.665385E-03
--1.062337E-01
-4.771650E-03
-1.155280E-01
-8.020320E-03
-8.348336E-02
-1.633941E-03
-1.475434E-02
-3.411046E-03
-4.474425E-03
-6.049348E-03
-6.716359E-03
-2.898000E-03
--3.674047E-02
-2.971797E-03
--2.368070E-02
-9.474965E-04
--6.109826E-02
-4.846201E-03
--5.076118E-02
-8.354393E-03
--1.763594E-02
-1.017310E-03
--2.941064E-02
-1.044916E-03
--5.631429E-03
-3.915186E-03
+4.160000E+00
+3.501000E+00
+9.464171E-02
+8.682833E-03
+8.467800E-02
+1.402624E-02
+-1.283471E-02
+2.630439E-02
+1.859869E-01
+1.189528E-02
+-1.910311E-02
+2.907370E-03
+-2.542253E-01
+2.143851E-02
+4.021473E-02
+5.812599E-03
+-1.242140E-01
+1.017873E-02
+2.934198E-02
+2.409920E-03
+5.719767E-02
+2.211520E-03
+-3.023903E-02
+2.870625E-03
+1.092479E-01
+6.089989E-03
+-1.604743E-02
+1.110224E-02
+3.811062E-03
+5.234112E-03
+-5.446762E-02
+5.323411E-03
+-3.868978E-02
+4.949255E-03
+-1.384260E-01
+4.903532E-03
+-3.761889E-02
+2.524889E-03
+6.079772E-02
+2.328339E-03
+1.956623E-03
+4.096814E-03
+-1.716402E-03
+2.022751E-03
+-1.108600E-01
+3.227014E-03
+2.447622E-03
+4.075421E-03
+1.582493E-02
+4.847858E-03
 0.000000E+00
 0.000000E+00
 0.000000E+00
@@ -1162,53 +1162,53 @@ tally 4:
 0.000000E+00
 0.000000E+00
 0.000000E+00
-4.104000E+01
-3.668254E+02
--7.832373E-01
-3.913941E-01
-2.281642E-01
-2.669856E-01
--3.731272E-01
-6.152809E-01
--3.232973E-01
-7.526283E-02
-3.686513E-01
-9.047618E-02
--6.018185E-01
-9.140623E-02
-3.848843E-01
-3.431711E-01
-3.397425E-03
-8.879103E-02
--2.471531E-02
-5.561795E-02
-1.373897E-01
-7.288680E-02
-1.816888E-01
-5.419638E-02
--3.504404E-01
-1.461853E-01
-1.225356E-01
-3.443595E-02
--3.109887E-01
-5.492397E-02
--3.542105E-01
-6.530224E-02
-2.104218E-01
-4.093872E-02
-2.661467E-02
-3.058847E-02
--3.744331E-01
-6.755739E-02
-1.391218E-01
-4.432842E-02
-1.622041E-01
-6.843992E-03
-4.149973E-02
-1.782398E-02
-2.551752E-01
-2.626972E-02
--4.706697E-01
-9.193926E-02
--1.287882E-01
-3.489982E-02
+5.213000E+01
+5.552351E+02
+6.019876E-01
+2.938936E-01
+2.126970E-01
+3.363271E-01
+6.928646E-01
+3.077152E-01
+-2.976474E-01
+5.830705E-02
+-7.804821E-01
+3.967156E-01
+5.737502E-01
+1.090147E-01
+2.867929E-01
+1.312720E-01
+-4.735578E-01
+6.714577E-02
+6.340442E-02
+4.240623E-02
+-1.594570E-01
+1.167021E-01
+5.403124E-02
+6.452745E-02
+-2.670969E-01
+5.822561E-02
+3.033558E-01
+4.890487E-02
+-3.515557E-01
+5.069681E-02
+-2.257462E-01
+4.682933E-02
+-1.449924E-02
+1.625521E-02
+-2.809498E-01
+6.883451E-02
+1.904808E-01
+1.004755E-01
+-2.570005E-01
+4.301248E-02
+9.493600E-02
+7.708499E-02
+2.804222E-01
+4.455703E-02
+3.199914E-01
+7.435651E-02
+2.818069E-04
+7.231318E-02
+3.689494E-01
+1.349712E-01
diff --git a/tests/test_score_total_yn/settings.xml b/tests/test_score_total_yn/settings.xml
deleted file mode 100644
index 517637a59f..0000000000
--- a/tests/test_score_total_yn/settings.xml
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0"?>
-<settings>
-
-  <eigenvalue>
-    <batches>10</batches>
-    <inactive>5</inactive>
-    <particles>100</particles>
-  </eigenvalue>
-
-  <source>
-    <space type="box">
-      <parameters>
-        -160 -160 -183
-         160  160  183
-      </parameters>
-    </space>
-  </source>
-
-</settings>
diff --git a/tests/test_score_total_yn/tallies.xml b/tests/test_score_total_yn/tallies.xml
deleted file mode 100644
index 51cb79c395..0000000000
--- a/tests/test_score_total_yn/tallies.xml
+++ /dev/null
@@ -1,29 +0,0 @@
-<?xml version="1.0"?>
-<tallies>
-
-  <tally id="1">
-    <filter type="cell" bins="10 21 22 23" />
-    <scores>total</scores>
-  </tally>
-  
-  <tally id="2">
-    <filter type="cell" bins="10 21 22 23" />
-    <scores>total-y4</scores>
-    <nuclides>U-235 total</nuclides>
-  </tally>
-  
-  <tally id="3">
-    <filter type="cell" bins="10 21 22 23" />
-    <scores>total-y4</scores>
-    <nuclides>U-235 total</nuclides>
-    <estimator>analog</estimator>
-  </tally>
-  
-  <tally id="4">
-    <filter type="cell" bins="10 21 22 23" />
-    <scores>total-y4</scores>
-    <nuclides>U-235 total</nuclides>
-    <estimator>collision</estimator>
-  </tally>
-
-</tallies>
diff --git a/tests/test_score_total_yn/test_score_total_yn.py b/tests/test_score_total_yn/test_score_total_yn.py
index 1777db993e..80f947f920 100644
--- a/tests/test_score_total_yn/test_score_total_yn.py
+++ b/tests/test_score_total_yn/test_score_total_yn.py
@@ -1,10 +1,35 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
-from testing_harness import TestHarness
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness, PyAPITestHarness
+import openmc
+
+
+class ScoreTotalYNTestHarness(PyAPITestHarness):
+    def _build_inputs(self):
+        filt = openmc.Filter(type='cell', bins=(10, 21, 22, 23))
+        tallies = [openmc.Tally(tally_id=i) for i in range(1, 5)]
+        [t.add_filter(filt) for t in tallies]
+        tallies[0].add_score('total')
+        [t.add_score('total-y4') for t in tallies[1:]]
+        [t.add_nuclide('U-235') for t in tallies[1:]]
+        [t.add_nuclide('total') for t in tallies[1:]]
+        tallies[1].estimator = 'tracklength'
+        tallies[2].estimator = 'analog'
+        tallies[3].estimator = 'collision'
+        self._input_set.tallies = openmc.TalliesFile()
+        [self._input_set.tallies.add_tally(t) for t in tallies]
+
+        super(ScoreTotalYNTestHarness, self)._build_inputs()
+
+    def _cleanup(self):
+        super(ScoreTotalYNTestHarness, self)._cleanup()
+        f = os.path.join(os.getcwd(), 'tallies.xml')
+        if os.path.exists(f): os.remove(f)
 
 
 if __name__ == '__main__':
-    harness = TestHarness('statepoint.10.*', True)
+    harness = ScoreTotalYNTestHarness('statepoint.10.*', True)
     harness.main()
diff --git a/tests/test_seed/test_seed.py b/tests/test_seed/test_seed.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_seed/test_seed.py
+++ b/tests/test_seed/test_seed.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_source_angle_mono/test_source_angle_mono.py b/tests/test_source_angle_mono/test_source_angle_mono.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_source_angle_mono/test_source_angle_mono.py
+++ b/tests/test_source_angle_mono/test_source_angle_mono.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_source_energy_maxwell/test_source_energy_maxwell.py b/tests/test_source_energy_maxwell/test_source_energy_maxwell.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_source_energy_maxwell/test_source_energy_maxwell.py
+++ b/tests/test_source_energy_maxwell/test_source_energy_maxwell.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_source_energy_mono/test_source_energy_mono.py b/tests/test_source_energy_mono/test_source_energy_mono.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_source_energy_mono/test_source_energy_mono.py
+++ b/tests/test_source_energy_mono/test_source_energy_mono.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_source_file/test_source_file.py b/tests/test_source_file/test_source_file.py
index fae6b2a72f..6f76438c2a 100644
--- a/tests/test_source_file/test_source_file.py
+++ b/tests/test_source_file/test_source_file.py
@@ -3,8 +3,7 @@
 import glob
 import os
 import sys
-
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import *
 
 
diff --git a/tests/test_source_point/test_source_point.py b/tests/test_source_point/test_source_point.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_source_point/test_source_point.py
+++ b/tests/test_source_point/test_source_point.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_sourcepoint_batch/test_sourcepoint_batch.py b/tests/test_sourcepoint_batch/test_sourcepoint_batch.py
index a306b9aa78..5db0541344 100644
--- a/tests/test_sourcepoint_batch/test_sourcepoint_batch.py
+++ b/tests/test_sourcepoint_batch/test_sourcepoint_batch.py
@@ -3,9 +3,9 @@
 import glob
 import os
 import sys
-
-sys.path.insert(0, '..')
-from testing_harness import *
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness
+from openmc.statepoint import StatePoint
 
 
 class SourcepointTestHarness(TestHarness):
diff --git a/tests/test_sourcepoint_interval/test_sourcepoint_interval.py b/tests/test_sourcepoint_interval/test_sourcepoint_interval.py
index a306b9aa78..5db0541344 100644
--- a/tests/test_sourcepoint_interval/test_sourcepoint_interval.py
+++ b/tests/test_sourcepoint_interval/test_sourcepoint_interval.py
@@ -3,9 +3,9 @@
 import glob
 import os
 import sys
-
-sys.path.insert(0, '..')
-from testing_harness import *
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness
+from openmc.statepoint import StatePoint
 
 
 class SourcepointTestHarness(TestHarness):
diff --git a/tests/test_sourcepoint_latest/test_sourcepoint_latest.py b/tests/test_sourcepoint_latest/test_sourcepoint_latest.py
index 7d0af89b97..724a88fa65 100644
--- a/tests/test_sourcepoint_latest/test_sourcepoint_latest.py
+++ b/tests/test_sourcepoint_latest/test_sourcepoint_latest.py
@@ -1,11 +1,9 @@
 #!/usr/bin/env python
 
-import glob
 import os
 import sys
-
-sys.path.insert(0, '..')
-from testing_harness import *
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness
 
 
 class SourcepointTestHarness(TestHarness):
diff --git a/tests/test_sourcepoint_restart/test_sourcepoint_restart.py b/tests/test_sourcepoint_restart/test_sourcepoint_restart.py
index 1777db993e..ed6addec45 100644
--- a/tests/test_sourcepoint_restart/test_sourcepoint_restart.py
+++ b/tests/test_sourcepoint_restart/test_sourcepoint_restart.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_statepoint_batch/test_statepoint_batch.py b/tests/test_statepoint_batch/test_statepoint_batch.py
index bc5632618f..e1dc167ffd 100644
--- a/tests/test_statepoint_batch/test_statepoint_batch.py
+++ b/tests/test_statepoint_batch/test_statepoint_batch.py
@@ -1,7 +1,9 @@
 #!/usr/bin/env python 
+
+import os
 import sys
-sys.path.insert(0, '..')
-from testing_harness import *
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness
 
 
 class StatepointTestHarness(TestHarness):
diff --git a/tests/test_statepoint_interval/test_statepoint_interval.py b/tests/test_statepoint_interval/test_statepoint_interval.py
index b41ee2b7ae..e7a42cdbe7 100644
--- a/tests/test_statepoint_interval/test_statepoint_interval.py
+++ b/tests/test_statepoint_interval/test_statepoint_interval.py
@@ -1,8 +1,9 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
-from testing_harness import *
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness
 
 
 class StatepointTestHarness(TestHarness):
diff --git a/tests/test_statepoint_restart/test_statepoint_restart.py b/tests/test_statepoint_restart/test_statepoint_restart.py
index dd42dc8ff5..59b77a8213 100644
--- a/tests/test_statepoint_restart/test_statepoint_restart.py
+++ b/tests/test_statepoint_restart/test_statepoint_restart.py
@@ -3,9 +3,10 @@
 import glob
 import os
 import sys
-
-sys.path.insert(0, '..')
-from testing_harness import *
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness
+from openmc.statepoint import StatePoint
+from openmc.executor import Executor
 
 
 class StatepointRestartTestHarness(TestHarness):
diff --git a/tests/test_statepoint_sourcesep/test_statepoint_sourcesep.py b/tests/test_statepoint_sourcesep/test_statepoint_sourcesep.py
index c7221c90c2..00ded42ec2 100644
--- a/tests/test_statepoint_sourcesep/test_statepoint_sourcesep.py
+++ b/tests/test_statepoint_sourcesep/test_statepoint_sourcesep.py
@@ -3,9 +3,8 @@
 import glob
 import os
 import sys
-
-sys.path.insert(0, '..')
-from testing_harness import *
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness
 
 
 class SourcepointTestHarness(TestHarness):
diff --git a/tests/test_survival_biasing/test_survival_biasing.py b/tests/test_survival_biasing/test_survival_biasing.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_survival_biasing/test_survival_biasing.py
+++ b/tests/test_survival_biasing/test_survival_biasing.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_tally_assumesep/test_tally_assumesep.py b/tests/test_tally_assumesep/test_tally_assumesep.py
index 1777db993e..ed6addec45 100644
--- a/tests/test_tally_assumesep/test_tally_assumesep.py
+++ b/tests/test_tally_assumesep/test_tally_assumesep.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_tally_nuclides/test_tally_nuclides.py b/tests/test_tally_nuclides/test_tally_nuclides.py
index 1777db993e..ed6addec45 100644
--- a/tests/test_tally_nuclides/test_tally_nuclides.py
+++ b/tests/test_tally_nuclides/test_tally_nuclides.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_trace/test_trace.py b/tests/test_trace/test_trace.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_trace/test_trace.py
+++ b/tests/test_trace/test_trace.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_track_output/test_track_output.py b/tests/test_track_output/test_track_output.py
index dc0eb1a69d..9e9ce87adb 100644
--- a/tests/test_track_output/test_track_output.py
+++ b/tests/test_track_output/test_track_output.py
@@ -2,11 +2,11 @@
 
 import glob
 import os
+from subprocess import call
 import shutil
 import sys
-
-sys.path.insert(0, '..')
-from testing_harness import *
+sys.path.insert(0, os.pardir)
+from testing_harness import TestHarness
 
 
 class TrackTestHarness(TestHarness):
diff --git a/tests/test_translation/test_translation.py b/tests/test_translation/test_translation.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_translation/test_translation.py
+++ b/tests/test_translation/test_translation.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_trigger_batch_interval/test_trigger_batch_interval.py b/tests/test_trigger_batch_interval/test_trigger_batch_interval.py
index e5c5b54b6b..59b900e503 100644
--- a/tests/test_trigger_batch_interval/test_trigger_batch_interval.py
+++ b/tests/test_trigger_batch_interval/test_trigger_batch_interval.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_trigger_no_batch_interval/test_trigger_no_batch_interval.py b/tests/test_trigger_no_batch_interval/test_trigger_no_batch_interval.py
index ff19e3d08d..f9cb68d627 100644
--- a/tests/test_trigger_no_batch_interval/test_trigger_no_batch_interval.py
+++ b/tests/test_trigger_no_batch_interval/test_trigger_no_batch_interval.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_trigger_no_status/test_trigger_no_status.py b/tests/test_trigger_no_status/test_trigger_no_status.py
index 1777db993e..ed6addec45 100644
--- a/tests/test_trigger_no_status/test_trigger_no_status.py
+++ b/tests/test_trigger_no_status/test_trigger_no_status.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_trigger_tallies/test_trigger_tallies.py b/tests/test_trigger_tallies/test_trigger_tallies.py
index 20094827e0..a0b2119dea 100644
--- a/tests/test_trigger_tallies/test_trigger_tallies.py
+++ b/tests/test_trigger_tallies/test_trigger_tallies.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_uniform_fs/test_uniform_fs.py b/tests/test_uniform_fs/test_uniform_fs.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_uniform_fs/test_uniform_fs.py
+++ b/tests/test_uniform_fs/test_uniform_fs.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_union_energy_grids/test_union_energy_grids.py b/tests/test_union_energy_grids/test_union_energy_grids.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_union_energy_grids/test_union_energy_grids.py
+++ b/tests/test_union_energy_grids/test_union_energy_grids.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_universe/test_universe.py b/tests/test_universe/test_universe.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_universe/test_universe.py
+++ b/tests/test_universe/test_universe.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/test_void/test_void.py b/tests/test_void/test_void.py
index 6633e59111..2a595f3e66 100644
--- a/tests/test_void/test_void.py
+++ b/tests/test_void/test_void.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python
 
+import os
 import sys
-sys.path.insert(0, '..')
+sys.path.insert(0, os.pardir)
 from testing_harness import TestHarness
 
 
diff --git a/tests/testing_harness.py b/tests/testing_harness.py
index 3dcbee6674..828fc3a094 100644
--- a/tests/testing_harness.py
+++ b/tests/testing_harness.py
@@ -11,7 +11,8 @@ import sys
 
 import numpy as np
 
-sys.path.insert(0, '../..')
+sys.path.insert(0, os.path.join(os.pardir, os.pardir))
+from input_set import InputSet
 from openmc.statepoint import StatePoint
 from openmc.executor import Executor
 import openmc.particle_restart as pr
@@ -123,7 +124,7 @@ class TestHarness(object):
 
     def _write_results(self, results_string):
         """Write the results to an ASCII file."""
-        with open('results_test.dat','w') as fh:
+        with open('results_test.dat', 'w') as fh:
             fh.write(results_string)
 
     def _overwrite_results(self):
@@ -131,12 +132,14 @@ class TestHarness(object):
         shutil.copyfile('results_test.dat', 'results_true.dat')
 
     def _compare_results(self):
+        """Make sure the current results agree with the _true standard."""
         compare = filecmp.cmp('results_test.dat', 'results_true.dat')
         if not compare:
             os.rename('results_test.dat', 'results_error.dat')
         assert compare, 'Results do not agree.'
 
     def _cleanup(self):
+        """Delete statepoints, tally, and test files."""
         output = glob.glob(os.path.join(os.getcwd(), 'statepoint.*.*'))
         output.append(os.path.join(os.getcwd(), 'tallies.out'))
         output.append(os.path.join(os.getcwd(), 'results_test.dat'))
@@ -267,3 +270,85 @@ class ParticleRestartTestHarness(TestHarness):
                                                            p.uvw[2])
 
         return outstr
+
+
+class PyAPITestHarness(TestHarness):
+    def __init__(self, statepoint_name, tallies_present=False):
+        TestHarness.__init__(self, statepoint_name, tallies_present)
+        self._input_set = InputSet()
+
+    def execute_test(self):
+        """Build input XMLs, run OpenMC, and verify correct results."""
+        try:
+            self._build_inputs()
+            inputs = self._get_inputs()
+            self._write_inputs(inputs)
+            self._compare_inputs()
+            self._run_openmc()
+            self._test_output_created()
+            results = self._get_results()
+            self._write_results(results)
+            self._compare_results()
+        finally:
+            self._cleanup()
+
+    def update_results(self):
+        """Update results_true.dat and inputs_true.dat"""
+        try:
+            self._build_inputs()
+            inputs = self._get_inputs()
+            self._write_inputs(inputs)
+            self._overwrite_inputs()
+            self._run_openmc()
+            self._test_output_created()
+            results = self._get_results()
+            self._write_results(results)
+            self._overwrite_results()
+        finally:
+            self._cleanup()
+
+    def _build_inputs(self):
+        """Write input XML files."""
+        self._input_set.build_default_materials_and_geometry()
+        self._input_set.build_default_settings()
+        self._input_set.export()
+
+    def _get_inputs(self):
+        """Return a hash digest of the input XML files."""
+        xmls = ('geometry.xml', 'tallies.xml', 'materials.xml', 'settings.xml')
+        xmls = [os.path.join(os.getcwd(), fname) for fname in xmls]
+        outstr = '\n'.join([open(fname).read() for fname in xmls
+                            if os.path.exists(fname)])
+
+        sha512 = hashlib.sha512()
+        sha512.update(outstr.encode('utf-8'))
+        outstr = sha512.hexdigest()
+
+        return outstr
+
+    def _write_inputs(self, input_digest):
+        """Write the digest of the input XMLs to an ASCII file."""
+        with open('inputs_test.dat', 'w') as fh:
+            fh.write(input_digest)
+
+    def _overwrite_inputs(self):
+        """Overwrite inputs_true.dat with inputs_test.dat"""
+        shutil.copyfile('inputs_test.dat', 'inputs_true.dat')
+
+    def _compare_inputs(self):
+        """Make sure the current inputs agree with the _true standard."""
+        compare = filecmp.cmp('inputs_test.dat', 'inputs_true.dat')
+        if not compare:
+            os.rename('inputs_test.dat', 'inputs_error.dat')
+        assert compare, 'Input files are broken.'
+
+    def _cleanup(self):
+        """Delete XMLs, statepoints, tally, and test files."""
+        TestHarness._cleanup(self)
+        output = [os.path.join(os.getcwd(), 'materials.xml')]
+        output.append(os.path.join(os.getcwd(), 'geometry.xml'))
+        output.append(os.path.join(os.getcwd(), 'settings.xml'))
+        output.append(os.path.join(os.getcwd(), 'inputs_test.dat'))
+        for f in output:
+            if os.path.exists(f):
+                os.remove(f)