diff --git a/tests/regression_tests/mg_temperature/macro/interpolation/case1/geometry.xml b/tests/regression_tests/mg_temperature/macro/interpolation/case1/geometry.xml
new file mode 100644
index 0000000000..e66b004c5d
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/macro/interpolation/case1/geometry.xml
@@ -0,0 +1,8 @@
+<?xml version='1.0' encoding='utf-8'?>
+<geometry>
+  <cell id="1" material="1" name="cell" region="33 -34 35 -36" temperature="520.0" universe="9" />
+  <surface boundary="reflective" coeffs="-11.1" id="33" type="x-plane" />
+  <surface boundary="reflective" coeffs="11.1" id="34" type="x-plane" />
+  <surface boundary="reflective" coeffs="-11.1" id="35" type="y-plane" />
+  <surface boundary="reflective" coeffs="11.1" id="36" type="y-plane" />
+</geometry>
diff --git a/tests/regression_tests/mg_temperature/macro/interpolation/case1/materials.xml b/tests/regression_tests/mg_temperature/macro/interpolation/case1/materials.xml
new file mode 100644
index 0000000000..e3e2097cb5
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/macro/interpolation/case1/materials.xml
@@ -0,0 +1,8 @@
+<?xml version='1.0' encoding='utf-8'?>
+<materials>
+  <cross_sections>../../../macro_2g.h5</cross_sections>
+  <material id="1" name="test material">
+    <density units="sum" />
+    <nuclide ao="1" name="macro" />
+  </material>
+</materials>
diff --git a/tests/regression_tests/mg_temperature/macro/interpolation/case1/results_true.dat b/tests/regression_tests/mg_temperature/macro/interpolation/case1/results_true.dat
new file mode 100644
index 0000000000..8cc89cfb0d
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/macro/interpolation/case1/results_true.dat
@@ -0,0 +1,4 @@
+k-combined:
+1.422739E+00 1.661420E-03
+k-analytical:
+1.418514E+00
\ No newline at end of file
diff --git a/tests/regression_tests/mg_temperature/macro/interpolation/case1/settings.xml b/tests/regression_tests/mg_temperature/macro/interpolation/case1/settings.xml
new file mode 100644
index 0000000000..4a51e8e80a
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/macro/interpolation/case1/settings.xml
@@ -0,0 +1,17 @@
+<?xml version='1.0' encoding='utf-8'?>
+<settings>
+  <run_mode>eigenvalue</run_mode>
+  <particles>5000</particles>
+  <batches>15</batches>
+  <inactive>5</inactive>
+  <source strength="1.0">
+    <space type="fission">
+      <parameters>-11.1 -11.1 -11.1 11.1 11.1 11.1</parameters>
+    </space>
+  </source>
+  <output>
+    <summary>false</summary>
+  </output>
+  <energy_mode>multi-group</energy_mode>
+  <temperature_method>interpolation</temperature_method>
+</settings>
diff --git a/tests/regression_tests/mg_temperature/macro/interpolation/case2/geometry.xml b/tests/regression_tests/mg_temperature/macro/interpolation/case2/geometry.xml
new file mode 100644
index 0000000000..838fb9f687
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/macro/interpolation/case2/geometry.xml
@@ -0,0 +1,8 @@
+<?xml version='1.0' encoding='utf-8'?>
+<geometry>
+  <cell id="1" material="1" name="cell" region="37 -38 39 -40" temperature="600" universe="10" />
+  <surface boundary="reflective" coeffs="-11.1" id="37" type="x-plane" />
+  <surface boundary="reflective" coeffs="11.1" id="38" type="x-plane" />
+  <surface boundary="reflective" coeffs="-11.1" id="39" type="y-plane" />
+  <surface boundary="reflective" coeffs="11.1" id="40" type="y-plane" />
+</geometry>
diff --git a/tests/regression_tests/mg_temperature/macro/interpolation/case2/materials.xml b/tests/regression_tests/mg_temperature/macro/interpolation/case2/materials.xml
new file mode 100644
index 0000000000..e3e2097cb5
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/macro/interpolation/case2/materials.xml
@@ -0,0 +1,8 @@
+<?xml version='1.0' encoding='utf-8'?>
+<materials>
+  <cross_sections>../../../macro_2g.h5</cross_sections>
+  <material id="1" name="test material">
+    <density units="sum" />
+    <nuclide ao="1" name="macro" />
+  </material>
+</materials>
diff --git a/tests/regression_tests/mg_temperature/macro/interpolation/case2/results_true.dat b/tests/regression_tests/mg_temperature/macro/interpolation/case2/results_true.dat
new file mode 100644
index 0000000000..965fe8002a
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/macro/interpolation/case2/results_true.dat
@@ -0,0 +1,4 @@
+k-combined:
+1.410995E+00 2.169214E-03
+k-analytical:
+1.410164E+00
\ No newline at end of file
diff --git a/tests/regression_tests/mg_temperature/macro/interpolation/case2/settings.xml b/tests/regression_tests/mg_temperature/macro/interpolation/case2/settings.xml
new file mode 100644
index 0000000000..4a51e8e80a
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/macro/interpolation/case2/settings.xml
@@ -0,0 +1,17 @@
+<?xml version='1.0' encoding='utf-8'?>
+<settings>
+  <run_mode>eigenvalue</run_mode>
+  <particles>5000</particles>
+  <batches>15</batches>
+  <inactive>5</inactive>
+  <source strength="1.0">
+    <space type="fission">
+      <parameters>-11.1 -11.1 -11.1 11.1 11.1 11.1</parameters>
+    </space>
+  </source>
+  <output>
+    <summary>false</summary>
+  </output>
+  <energy_mode>multi-group</energy_mode>
+  <temperature_method>interpolation</temperature_method>
+</settings>
diff --git a/tests/regression_tests/mg_temperature/macro/nearest/case1/geometry.xml b/tests/regression_tests/mg_temperature/macro/nearest/case1/geometry.xml
new file mode 100644
index 0000000000..f64d315932
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/macro/nearest/case1/geometry.xml
@@ -0,0 +1,8 @@
+<?xml version='1.0' encoding='utf-8'?>
+<geometry>
+  <cell id="1" material="1" name="cell" region="21 -22 23 -24" temperature="300.0" universe="6" />
+  <surface boundary="reflective" coeffs="-11.1" id="21" type="x-plane" />
+  <surface boundary="reflective" coeffs="11.1" id="22" type="x-plane" />
+  <surface boundary="reflective" coeffs="-11.1" id="23" type="y-plane" />
+  <surface boundary="reflective" coeffs="11.1" id="24" type="y-plane" />
+</geometry>
diff --git a/tests/regression_tests/mg_temperature/macro/nearest/case1/materials.xml b/tests/regression_tests/mg_temperature/macro/nearest/case1/materials.xml
new file mode 100644
index 0000000000..e3e2097cb5
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/macro/nearest/case1/materials.xml
@@ -0,0 +1,8 @@
+<?xml version='1.0' encoding='utf-8'?>
+<materials>
+  <cross_sections>../../../macro_2g.h5</cross_sections>
+  <material id="1" name="test material">
+    <density units="sum" />
+    <nuclide ao="1" name="macro" />
+  </material>
+</materials>
diff --git a/tests/regression_tests/mg_temperature/macro/nearest/case1/results_true.dat b/tests/regression_tests/mg_temperature/macro/nearest/case1/results_true.dat
new file mode 100644
index 0000000000..5d7f81f288
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/macro/nearest/case1/results_true.dat
@@ -0,0 +1,4 @@
+k-combined:
+1.443970E+00 3.267499E-03
+k-analytical:
+1.440410E+00
\ No newline at end of file
diff --git a/tests/regression_tests/mg_temperature/macro/nearest/case1/settings.xml b/tests/regression_tests/mg_temperature/macro/nearest/case1/settings.xml
new file mode 100644
index 0000000000..b5ad0fec4f
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/macro/nearest/case1/settings.xml
@@ -0,0 +1,17 @@
+<?xml version='1.0' encoding='utf-8'?>
+<settings>
+  <run_mode>eigenvalue</run_mode>
+  <particles>5000</particles>
+  <batches>15</batches>
+  <inactive>5</inactive>
+  <source strength="1.0">
+    <space type="fission">
+      <parameters>-11.1 -11.1 -11.1 11.1 11.1 11.1</parameters>
+    </space>
+  </source>
+  <output>
+    <summary>false</summary>
+  </output>
+  <energy_mode>multi-group</energy_mode>
+  <temperature_method>nearest</temperature_method>
+</settings>
diff --git a/tests/regression_tests/mg_temperature/macro/nearest/case2/geometry.xml b/tests/regression_tests/mg_temperature/macro/nearest/case2/geometry.xml
new file mode 100644
index 0000000000..de56931104
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/macro/nearest/case2/geometry.xml
@@ -0,0 +1,8 @@
+<?xml version='1.0' encoding='utf-8'?>
+<geometry>
+  <cell id="1" material="1" name="cell" region="25 -26 27 -28" temperature="600.0" universe="7" />
+  <surface boundary="reflective" coeffs="-11.1" id="25" type="x-plane" />
+  <surface boundary="reflective" coeffs="11.1" id="26" type="x-plane" />
+  <surface boundary="reflective" coeffs="-11.1" id="27" type="y-plane" />
+  <surface boundary="reflective" coeffs="11.1" id="28" type="y-plane" />
+</geometry>
diff --git a/tests/regression_tests/mg_temperature/macro/nearest/case2/materials.xml b/tests/regression_tests/mg_temperature/macro/nearest/case2/materials.xml
new file mode 100644
index 0000000000..e3e2097cb5
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/macro/nearest/case2/materials.xml
@@ -0,0 +1,8 @@
+<?xml version='1.0' encoding='utf-8'?>
+<materials>
+  <cross_sections>../../../macro_2g.h5</cross_sections>
+  <material id="1" name="test material">
+    <density units="sum" />
+    <nuclide ao="1" name="macro" />
+  </material>
+</materials>
diff --git a/tests/regression_tests/mg_temperature/macro/nearest/case2/results_true.dat b/tests/regression_tests/mg_temperature/macro/nearest/case2/results_true.dat
new file mode 100644
index 0000000000..965fe8002a
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/macro/nearest/case2/results_true.dat
@@ -0,0 +1,4 @@
+k-combined:
+1.410995E+00 2.169214E-03
+k-analytical:
+1.410164E+00
\ No newline at end of file
diff --git a/tests/regression_tests/mg_temperature/macro/nearest/case2/settings.xml b/tests/regression_tests/mg_temperature/macro/nearest/case2/settings.xml
new file mode 100644
index 0000000000..b5ad0fec4f
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/macro/nearest/case2/settings.xml
@@ -0,0 +1,17 @@
+<?xml version='1.0' encoding='utf-8'?>
+<settings>
+  <run_mode>eigenvalue</run_mode>
+  <particles>5000</particles>
+  <batches>15</batches>
+  <inactive>5</inactive>
+  <source strength="1.0">
+    <space type="fission">
+      <parameters>-11.1 -11.1 -11.1 11.1 11.1 11.1</parameters>
+    </space>
+  </source>
+  <output>
+    <summary>false</summary>
+  </output>
+  <energy_mode>multi-group</energy_mode>
+  <temperature_method>nearest</temperature_method>
+</settings>
diff --git a/tests/regression_tests/mg_temperature/macro/nearest/case3/geometry.xml b/tests/regression_tests/mg_temperature/macro/nearest/case3/geometry.xml
new file mode 100644
index 0000000000..a95b7b55ac
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/macro/nearest/case3/geometry.xml
@@ -0,0 +1,8 @@
+<?xml version='1.0' encoding='utf-8'?>
+<geometry>
+  <cell id="1" material="1" name="cell" region="29 -30 31 -32" temperature="900.0" universe="8" />
+  <surface boundary="reflective" coeffs="-11.1" id="29" type="x-plane" />
+  <surface boundary="reflective" coeffs="11.1" id="30" type="x-plane" />
+  <surface boundary="reflective" coeffs="-11.1" id="31" type="y-plane" />
+  <surface boundary="reflective" coeffs="11.1" id="32" type="y-plane" />
+</geometry>
diff --git a/tests/regression_tests/mg_temperature/macro/nearest/case3/materials.xml b/tests/regression_tests/mg_temperature/macro/nearest/case3/materials.xml
new file mode 100644
index 0000000000..e3e2097cb5
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/macro/nearest/case3/materials.xml
@@ -0,0 +1,8 @@
+<?xml version='1.0' encoding='utf-8'?>
+<materials>
+  <cross_sections>../../../macro_2g.h5</cross_sections>
+  <material id="1" name="test material">
+    <density units="sum" />
+    <nuclide ao="1" name="macro" />
+  </material>
+</materials>
diff --git a/tests/regression_tests/mg_temperature/macro/nearest/case3/results_true.dat b/tests/regression_tests/mg_temperature/macro/nearest/case3/results_true.dat
new file mode 100644
index 0000000000..39d3eb5e34
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/macro/nearest/case3/results_true.dat
@@ -0,0 +1,4 @@
+k-combined:
+1.411726E+00 2.151179E-03
+k-analytical:
+1.407830E+00
\ No newline at end of file
diff --git a/tests/regression_tests/mg_temperature/macro/nearest/case3/settings.xml b/tests/regression_tests/mg_temperature/macro/nearest/case3/settings.xml
new file mode 100644
index 0000000000..b5ad0fec4f
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/macro/nearest/case3/settings.xml
@@ -0,0 +1,17 @@
+<?xml version='1.0' encoding='utf-8'?>
+<settings>
+  <run_mode>eigenvalue</run_mode>
+  <particles>5000</particles>
+  <batches>15</batches>
+  <inactive>5</inactive>
+  <source strength="1.0">
+    <space type="fission">
+      <parameters>-11.1 -11.1 -11.1 11.1 11.1 11.1</parameters>
+    </space>
+  </source>
+  <output>
+    <summary>false</summary>
+  </output>
+  <energy_mode>multi-group</energy_mode>
+  <temperature_method>nearest</temperature_method>
+</settings>
diff --git a/tests/regression_tests/mg_temperature/micro/interpolation/case1/geometry.xml b/tests/regression_tests/mg_temperature/micro/interpolation/case1/geometry.xml
new file mode 100644
index 0000000000..b54f27f415
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/micro/interpolation/case1/geometry.xml
@@ -0,0 +1,8 @@
+<?xml version='1.0' encoding='utf-8'?>
+<geometry>
+  <cell id="1" material="1" name="cell" region="13 -14 15 -16" temperature="520.0" universe="4" />
+  <surface boundary="reflective" coeffs="-11.1" id="13" type="x-plane" />
+  <surface boundary="reflective" coeffs="11.1" id="14" type="x-plane" />
+  <surface boundary="reflective" coeffs="-11.1" id="15" type="y-plane" />
+  <surface boundary="reflective" coeffs="11.1" id="16" type="y-plane" />
+</geometry>
diff --git a/tests/regression_tests/mg_temperature/micro/interpolation/case1/materials.xml b/tests/regression_tests/mg_temperature/micro/interpolation/case1/materials.xml
new file mode 100644
index 0000000000..98f9236e61
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/micro/interpolation/case1/materials.xml
@@ -0,0 +1,12 @@
+<?xml version='1.0' encoding='utf-8'?>
+<materials>
+  <cross_sections>../../../micro_2g.h5</cross_sections>
+  <material depletable="true" id="1" name="test material">
+    <density units="sum" />
+    <nuclide ao="1" name="H" />
+    <nuclide ao="1" name="O" />
+    <nuclide ao="1" name="Zr" />
+    <nuclide ao="1" name="U235" />
+    <nuclide ao="1" name="U238" />
+  </material>
+</materials>
diff --git a/tests/regression_tests/mg_temperature/micro/interpolation/case1/results_true.dat b/tests/regression_tests/mg_temperature/micro/interpolation/case1/results_true.dat
new file mode 100644
index 0000000000..8cc89cfb0d
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/micro/interpolation/case1/results_true.dat
@@ -0,0 +1,4 @@
+k-combined:
+1.422739E+00 1.661420E-03
+k-analytical:
+1.418514E+00
\ No newline at end of file
diff --git a/tests/regression_tests/mg_temperature/micro/interpolation/case1/settings.xml b/tests/regression_tests/mg_temperature/micro/interpolation/case1/settings.xml
new file mode 100644
index 0000000000..4a51e8e80a
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/micro/interpolation/case1/settings.xml
@@ -0,0 +1,17 @@
+<?xml version='1.0' encoding='utf-8'?>
+<settings>
+  <run_mode>eigenvalue</run_mode>
+  <particles>5000</particles>
+  <batches>15</batches>
+  <inactive>5</inactive>
+  <source strength="1.0">
+    <space type="fission">
+      <parameters>-11.1 -11.1 -11.1 11.1 11.1 11.1</parameters>
+    </space>
+  </source>
+  <output>
+    <summary>false</summary>
+  </output>
+  <energy_mode>multi-group</energy_mode>
+  <temperature_method>interpolation</temperature_method>
+</settings>
diff --git a/tests/regression_tests/mg_temperature/micro/interpolation/case2/geometry.xml b/tests/regression_tests/mg_temperature/micro/interpolation/case2/geometry.xml
new file mode 100644
index 0000000000..4eeb35ac88
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/micro/interpolation/case2/geometry.xml
@@ -0,0 +1,8 @@
+<?xml version='1.0' encoding='utf-8'?>
+<geometry>
+  <cell id="1" material="1" name="cell" region="17 -18 19 -20" temperature="600.0" universe="5" />
+  <surface boundary="reflective" coeffs="-11.1" id="17" type="x-plane" />
+  <surface boundary="reflective" coeffs="11.1" id="18" type="x-plane" />
+  <surface boundary="reflective" coeffs="-11.1" id="19" type="y-plane" />
+  <surface boundary="reflective" coeffs="11.1" id="20" type="y-plane" />
+</geometry>
diff --git a/tests/regression_tests/mg_temperature/micro/interpolation/case2/materials.xml b/tests/regression_tests/mg_temperature/micro/interpolation/case2/materials.xml
new file mode 100644
index 0000000000..98f9236e61
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/micro/interpolation/case2/materials.xml
@@ -0,0 +1,12 @@
+<?xml version='1.0' encoding='utf-8'?>
+<materials>
+  <cross_sections>../../../micro_2g.h5</cross_sections>
+  <material depletable="true" id="1" name="test material">
+    <density units="sum" />
+    <nuclide ao="1" name="H" />
+    <nuclide ao="1" name="O" />
+    <nuclide ao="1" name="Zr" />
+    <nuclide ao="1" name="U235" />
+    <nuclide ao="1" name="U238" />
+  </material>
+</materials>
diff --git a/tests/regression_tests/mg_temperature/micro/interpolation/case2/results_true.dat b/tests/regression_tests/mg_temperature/micro/interpolation/case2/results_true.dat
new file mode 100644
index 0000000000..965fe8002a
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/micro/interpolation/case2/results_true.dat
@@ -0,0 +1,4 @@
+k-combined:
+1.410995E+00 2.169214E-03
+k-analytical:
+1.410164E+00
\ No newline at end of file
diff --git a/tests/regression_tests/mg_temperature/micro/interpolation/case2/settings.xml b/tests/regression_tests/mg_temperature/micro/interpolation/case2/settings.xml
new file mode 100644
index 0000000000..4a51e8e80a
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/micro/interpolation/case2/settings.xml
@@ -0,0 +1,17 @@
+<?xml version='1.0' encoding='utf-8'?>
+<settings>
+  <run_mode>eigenvalue</run_mode>
+  <particles>5000</particles>
+  <batches>15</batches>
+  <inactive>5</inactive>
+  <source strength="1.0">
+    <space type="fission">
+      <parameters>-11.1 -11.1 -11.1 11.1 11.1 11.1</parameters>
+    </space>
+  </source>
+  <output>
+    <summary>false</summary>
+  </output>
+  <energy_mode>multi-group</energy_mode>
+  <temperature_method>interpolation</temperature_method>
+</settings>
diff --git a/tests/regression_tests/mg_temperature/micro/nearest/case1/geometry.xml b/tests/regression_tests/mg_temperature/micro/nearest/case1/geometry.xml
new file mode 100644
index 0000000000..e1da2fa5c6
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/micro/nearest/case1/geometry.xml
@@ -0,0 +1,8 @@
+<?xml version='1.0' encoding='utf-8'?>
+<geometry>
+  <cell id="1" material="1" name="cell" region="1 -2 3 -4" temperature="300.0" universe="1" />
+  <surface boundary="reflective" coeffs="-11.1" id="1" type="x-plane" />
+  <surface boundary="reflective" coeffs="11.1" id="2" type="x-plane" />
+  <surface boundary="reflective" coeffs="-11.1" id="3" type="y-plane" />
+  <surface boundary="reflective" coeffs="11.1" id="4" type="y-plane" />
+</geometry>
diff --git a/tests/regression_tests/mg_temperature/micro/nearest/case1/materials.xml b/tests/regression_tests/mg_temperature/micro/nearest/case1/materials.xml
new file mode 100644
index 0000000000..98f9236e61
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/micro/nearest/case1/materials.xml
@@ -0,0 +1,12 @@
+<?xml version='1.0' encoding='utf-8'?>
+<materials>
+  <cross_sections>../../../micro_2g.h5</cross_sections>
+  <material depletable="true" id="1" name="test material">
+    <density units="sum" />
+    <nuclide ao="1" name="H" />
+    <nuclide ao="1" name="O" />
+    <nuclide ao="1" name="Zr" />
+    <nuclide ao="1" name="U235" />
+    <nuclide ao="1" name="U238" />
+  </material>
+</materials>
diff --git a/tests/regression_tests/mg_temperature/micro/nearest/case1/results_true.dat b/tests/regression_tests/mg_temperature/micro/nearest/case1/results_true.dat
new file mode 100644
index 0000000000..5d7f81f288
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/micro/nearest/case1/results_true.dat
@@ -0,0 +1,4 @@
+k-combined:
+1.443970E+00 3.267499E-03
+k-analytical:
+1.440410E+00
\ No newline at end of file
diff --git a/tests/regression_tests/mg_temperature/micro/nearest/case1/settings.xml b/tests/regression_tests/mg_temperature/micro/nearest/case1/settings.xml
new file mode 100644
index 0000000000..b5ad0fec4f
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/micro/nearest/case1/settings.xml
@@ -0,0 +1,17 @@
+<?xml version='1.0' encoding='utf-8'?>
+<settings>
+  <run_mode>eigenvalue</run_mode>
+  <particles>5000</particles>
+  <batches>15</batches>
+  <inactive>5</inactive>
+  <source strength="1.0">
+    <space type="fission">
+      <parameters>-11.1 -11.1 -11.1 11.1 11.1 11.1</parameters>
+    </space>
+  </source>
+  <output>
+    <summary>false</summary>
+  </output>
+  <energy_mode>multi-group</energy_mode>
+  <temperature_method>nearest</temperature_method>
+</settings>
diff --git a/tests/regression_tests/mg_temperature/micro/nearest/case2/geometry.xml b/tests/regression_tests/mg_temperature/micro/nearest/case2/geometry.xml
new file mode 100644
index 0000000000..1ac560e8f7
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/micro/nearest/case2/geometry.xml
@@ -0,0 +1,8 @@
+<?xml version='1.0' encoding='utf-8'?>
+<geometry>
+  <cell id="1" material="1" name="cell" region="5 -6 7 -8" temperature="600.0" universe="2" />
+  <surface boundary="reflective" coeffs="-11.1" id="5" type="x-plane" />
+  <surface boundary="reflective" coeffs="11.1" id="6" type="x-plane" />
+  <surface boundary="reflective" coeffs="-11.1" id="7" type="y-plane" />
+  <surface boundary="reflective" coeffs="11.1" id="8" type="y-plane" />
+</geometry>
diff --git a/tests/regression_tests/mg_temperature/micro/nearest/case2/materials.xml b/tests/regression_tests/mg_temperature/micro/nearest/case2/materials.xml
new file mode 100644
index 0000000000..98f9236e61
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/micro/nearest/case2/materials.xml
@@ -0,0 +1,12 @@
+<?xml version='1.0' encoding='utf-8'?>
+<materials>
+  <cross_sections>../../../micro_2g.h5</cross_sections>
+  <material depletable="true" id="1" name="test material">
+    <density units="sum" />
+    <nuclide ao="1" name="H" />
+    <nuclide ao="1" name="O" />
+    <nuclide ao="1" name="Zr" />
+    <nuclide ao="1" name="U235" />
+    <nuclide ao="1" name="U238" />
+  </material>
+</materials>
diff --git a/tests/regression_tests/mg_temperature/micro/nearest/case2/results_true.dat b/tests/regression_tests/mg_temperature/micro/nearest/case2/results_true.dat
new file mode 100644
index 0000000000..965fe8002a
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/micro/nearest/case2/results_true.dat
@@ -0,0 +1,4 @@
+k-combined:
+1.410995E+00 2.169214E-03
+k-analytical:
+1.410164E+00
\ No newline at end of file
diff --git a/tests/regression_tests/mg_temperature/micro/nearest/case2/settings.xml b/tests/regression_tests/mg_temperature/micro/nearest/case2/settings.xml
new file mode 100644
index 0000000000..b5ad0fec4f
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/micro/nearest/case2/settings.xml
@@ -0,0 +1,17 @@
+<?xml version='1.0' encoding='utf-8'?>
+<settings>
+  <run_mode>eigenvalue</run_mode>
+  <particles>5000</particles>
+  <batches>15</batches>
+  <inactive>5</inactive>
+  <source strength="1.0">
+    <space type="fission">
+      <parameters>-11.1 -11.1 -11.1 11.1 11.1 11.1</parameters>
+    </space>
+  </source>
+  <output>
+    <summary>false</summary>
+  </output>
+  <energy_mode>multi-group</energy_mode>
+  <temperature_method>nearest</temperature_method>
+</settings>
diff --git a/tests/regression_tests/mg_temperature/micro/nearest/case3/geometry.xml b/tests/regression_tests/mg_temperature/micro/nearest/case3/geometry.xml
new file mode 100644
index 0000000000..c8d1164f13
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/micro/nearest/case3/geometry.xml
@@ -0,0 +1,8 @@
+<?xml version='1.0' encoding='utf-8'?>
+<geometry>
+  <cell id="1" material="1" name="cell" region="9 -10 11 -12" temperature="900.0" universe="3" />
+  <surface boundary="reflective" coeffs="-11.1" id="9" type="x-plane" />
+  <surface boundary="reflective" coeffs="11.1" id="10" type="x-plane" />
+  <surface boundary="reflective" coeffs="-11.1" id="11" type="y-plane" />
+  <surface boundary="reflective" coeffs="11.1" id="12" type="y-plane" />
+</geometry>
diff --git a/tests/regression_tests/mg_temperature/micro/nearest/case3/materials.xml b/tests/regression_tests/mg_temperature/micro/nearest/case3/materials.xml
new file mode 100644
index 0000000000..98f9236e61
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/micro/nearest/case3/materials.xml
@@ -0,0 +1,12 @@
+<?xml version='1.0' encoding='utf-8'?>
+<materials>
+  <cross_sections>../../../micro_2g.h5</cross_sections>
+  <material depletable="true" id="1" name="test material">
+    <density units="sum" />
+    <nuclide ao="1" name="H" />
+    <nuclide ao="1" name="O" />
+    <nuclide ao="1" name="Zr" />
+    <nuclide ao="1" name="U235" />
+    <nuclide ao="1" name="U238" />
+  </material>
+</materials>
diff --git a/tests/regression_tests/mg_temperature/micro/nearest/case3/results_true.dat b/tests/regression_tests/mg_temperature/micro/nearest/case3/results_true.dat
new file mode 100644
index 0000000000..39d3eb5e34
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/micro/nearest/case3/results_true.dat
@@ -0,0 +1,4 @@
+k-combined:
+1.411726E+00 2.151179E-03
+k-analytical:
+1.407830E+00
\ No newline at end of file
diff --git a/tests/regression_tests/mg_temperature/micro/nearest/case3/settings.xml b/tests/regression_tests/mg_temperature/micro/nearest/case3/settings.xml
new file mode 100644
index 0000000000..b5ad0fec4f
--- /dev/null
+++ b/tests/regression_tests/mg_temperature/micro/nearest/case3/settings.xml
@@ -0,0 +1,17 @@
+<?xml version='1.0' encoding='utf-8'?>
+<settings>
+  <run_mode>eigenvalue</run_mode>
+  <particles>5000</particles>
+  <batches>15</batches>
+  <inactive>5</inactive>
+  <source strength="1.0">
+    <space type="fission">
+      <parameters>-11.1 -11.1 -11.1 11.1 11.1 11.1</parameters>
+    </space>
+  </source>
+  <output>
+    <summary>false</summary>
+  </output>
+  <energy_mode>multi-group</energy_mode>
+  <temperature_method>nearest</temperature_method>
+</settings>