diff --git a/tests/py/unit/test_tools_build_defect.py b/tests/py/unit/test_tools_build_defect.py
index 318adef7..194d535f 100644
--- a/tests/py/unit/test_tools_build_defect.py
+++ b/tests/py/unit/test_tools_build_defect.py
@@ -5,19 +5,24 @@
     EquidistantAdatomSlabDefectBuilder,
     PointDefectBuilderParameters,
     PointDefectConfiguration,
+    PointDefectTypeEnum,
     create_defect,
     create_slab_defect,
-    PointDefectTypeEnum,
 )
-from mat3ra.made.tools.build.defect.builders import IslandSlabDefectBuilder, TerraceSlabDefectBuilder
-from mat3ra.made.tools.build.defect.configuration import IslandSlabDefectConfiguration, TerraceSlabDefectConfiguration
+from mat3ra.made.tools.build.defect.builders import (
+    IslandSlabDefectBuilder,
+    PointDefectPairBuilder,
+    TerraceSlabDefectBuilder,
+)
+from mat3ra.made.tools.build.defect.configuration import (
+    IslandSlabDefectConfiguration,
+    PointDefectPairConfiguration,
+    TerraceSlabDefectConfiguration,
+)
 from mat3ra.made.tools.build.slab import SlabConfiguration, create_slab, get_terminations
 from mat3ra.made.tools.utils import CoordinateConditionBuilder
 from mat3ra.utils import assertion as assertion_utils
 
-from mat3ra.made.tools.build.defect.builders import PointDefectPairBuilder
-from mat3ra.made.tools.build.defect.configuration import PointDefectPairConfiguration
-
 clean_material = Material.create(Material.default_config)
 
 slab_111_config = SlabConfiguration(