diff --git a/tests/test_get_library_type.py b/tests/test_get_library_type.py
index 23c8a49..5d900df 100644
--- a/tests/test_get_library_type.py
+++ b/tests/test_get_library_type.py
@@ -111,7 +111,7 @@ def test_evaluate_mate_relationship_split_mates(self):
         assert (
             test_instance.results.relationship ==
             StatesTypeRelationship.split_mates
-        )       
+        )
 
     def test_evaluate_mate_relationship_assumed_single(self, tmpdir):
         """Test mate relationship evaluation logic with input files being