diff --git a/tests/unit_tests/test_material.py b/tests/unit_tests/test_material.py
index ce9bc2122..9425da44f 100644
--- a/tests/unit_tests/test_material.py
+++ b/tests/unit_tests/test_material.py
@@ -348,7 +348,6 @@ def test_get_specific_nuclide_atom_densities(uo2):
     assert all_nuc['O16'] == one_nuc['O16']
 
 
-
 def test_get_nuclide_atoms():
     mat = openmc.Material()
     mat.add_nuclide('Li6', 1.0)