diff --git a/tests/regression_tests/mgxs_library_nuclides/test.py b/tests/regression_tests/mgxs_library_nuclides/test.py
index a08cb826d6..87a65723c5 100644
--- a/tests/regression_tests/mgxs_library_nuclides/test.py
+++ b/tests/regression_tests/mgxs_library_nuclides/test.py
@@ -19,10 +19,8 @@ class MGXSTestHarness(PyAPITestHarness):
         self.mgxs_lib.by_nuclide = True
 
         # Test relevant all MGXS types
-        relevant_MGXS_TYPES = []
-        for item in openmc.mgxs.MGXS_TYPES:
-            if item != 'current':
-                relevant_MGXS_TYPES = relevant_MGXS_TYPES + [item]
+        relevant_MGXS_TYPES = [item for item in openmc.mgxs.MGXS_TYPES
+                               if item != 'current']
         self.mgxs_lib.mgxs_types = tuple(relevant_MGXS_TYPES)
         self.mgxs_lib.energy_groups = energy_groups
         self.mgxs_lib.legendre_order = 3