diff --git a/tests/test_mg_convert/inputs_true.dat b/tests/test_mg_convert/inputs_true.dat
index 9bfb1dfbae..85eeb3a24a 100644
--- a/tests/test_mg_convert/inputs_true.dat
+++ b/tests/test_mg_convert/inputs_true.dat
@@ -16,11 +16,10 @@
 </materials>
 <?xml version='1.0' encoding='utf-8'?>
 <settings>
-    <eigenvalue>
-        <particles>100</particles>
-        <batches>10</batches>
-        <inactive>5</inactive>
-    </eigenvalue>
+    <run_mode>eigenvalue</run_mode>
+    <particles>100</particles>
+    <batches>10</batches>
+    <inactive>5</inactive>
     <source strength="1.0">
         <space type="box">
             <parameters>-5 -5 -5 5 5 5</parameters>
diff --git a/tests/test_mg_convert/test_mg_convert.py b/tests/test_mg_convert/test_mg_convert.py
index 607195a82b..f4cd90e713 100755
--- a/tests/test_mg_convert/test_mg_convert.py
+++ b/tests/test_mg_convert/test_mg_convert.py
@@ -138,9 +138,9 @@ class MGXSTestHarness(PyAPITestHarness):
             build_mgxs_library(case)
 
             if self._opts.mpi_exec is not None:
-                returncode = openmc.run(mpi_procs=self._opts.mpi_np,
-                                        openmc_exec=self._opts.exe,
-                                        mpi_exec=self._opts.mpi_exec)
+                mpi_args = [self._opts.mpi_exec, '-n', self._opts.mpi_np]
+                returncode = openmc.run(openmc_exec=self._opts.exe,
+                                        mpi_args=mpi_args)
 
             else:
                 returncode = openmc.run(openmc_exec=self._opts.exe)
diff --git a/tests/test_mg_legendre/inputs_true.dat b/tests/test_mg_legendre/inputs_true.dat
index fe0b5cf16d..ca24a0dcf7 100644
--- a/tests/test_mg_legendre/inputs_true.dat
+++ b/tests/test_mg_legendre/inputs_true.dat
@@ -30,11 +30,10 @@
 </materials>
 <?xml version='1.0' encoding='utf-8'?>
 <settings>
-    <eigenvalue>
-        <particles>100</particles>
-        <batches>10</batches>
-        <inactive>5</inactive>
-    </eigenvalue>
+    <run_mode>eigenvalue</run_mode>
+    <particles>100</particles>
+    <batches>10</batches>
+    <inactive>5</inactive>
     <source strength="1.0">
         <space type="box">
             <parameters>0.0 0.0 0.0 10.0 10.0 5.0</parameters>