diff --git a/tests/regression_tests/mg_tallies/results_true.dat b/tests/regression_tests/mg_tallies/results_true.dat
index 50ec653e2..8743a290f 100644
--- a/tests/regression_tests/mg_tallies/results_true.dat
+++ b/tests/regression_tests/mg_tallies/results_true.dat
@@ -1 +1,1324 @@
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\ No newline at end of file
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diff --git a/tests/regression_tests/mg_tallies/test.py b/tests/regression_tests/mg_tallies/test.py
index e1c19e6b7..f4e9693f6 100644
--- a/tests/regression_tests/mg_tallies/test.py
+++ b/tests/regression_tests/mg_tallies/test.py
@@ -5,7 +5,7 @@ import numpy as np
 import openmc
 from openmc.examples import slab_mg
 
-from tests.testing_harness import HashedPyAPITestHarness
+from tests.testing_harness import PyAPITestHarness
 
 
 def create_library():
@@ -49,7 +49,7 @@ def create_library():
     mg_cross_sections_file.export_to_hdf5('2g.h5')
 
 
-class MGXSTestHarness(HashedPyAPITestHarness):
+class MGXSTestHarness(PyAPITestHarness):
     def _cleanup(self):
         super()._cleanup()
         f = '2g.h5'
@@ -144,5 +144,5 @@ def test_mg_tallies():
                 t.nuclides = nuclides
             model.tallies.append(t)
 
-    harness = HashedPyAPITestHarness('statepoint.10.h5', model)
+    harness = MGXSTestHarness('statepoint.10.h5', model)
     harness.main()