diff --git a/tests/unit/spec_tests/test_group_spec.py b/tests/unit/spec_tests/test_group_spec.py
index e5387eea6..b1da524e2 100644
--- a/tests/unit/spec_tests/test_group_spec.py
+++ b/tests/unit/spec_tests/test_group_spec.py
@@ -410,7 +410,7 @@ def test_is_overridden_group(self):
         base_spec = GroupSpec('A base group',
                             data_type_def='BaseType',
                             groups=[base_group])
-        
+
         # Create extending spec that overrides the group
         override_group = GroupSpec('Override group',
                                  name='test_group',
@@ -419,20 +419,20 @@ def test_is_overridden_group(self):
                            data_type_inc='BaseType',
                            data_type_def='ExtType',
                            groups=[override_group])
-        
+
         # Resolve the extension
         ext_spec.resolve_spec(base_spec)
-        
+
         # Test base spec has no overridden groups
         self.assertFalse(base_spec.is_overridden_group('test_group'))
-        
+
         # Test extending spec correctly identifies overridden group
         self.assertTrue(ext_spec.is_overridden_group('test_group'))
-        
+
         # Test non-existent group raises error
         with self.assertRaisesWith(ValueError, "Group 'nonexistent_group' not found in spec"):
             ext_spec.is_overridden_group('nonexistent_group')
-        
+
         # Test new group in extending spec is not overridden
         new_group = GroupSpec('New group',
                             name='new_group',