diff --git a/src/demo/classes.py b/src/demo/classes.py
index e277976..246d2bc 100644
--- a/src/demo/classes.py
+++ b/src/demo/classes.py
@@ -1,9 +1,8 @@
-from io import BytesIO
-import pandas as pd
-
 from abc import ABC, abstractmethod
+from io import BytesIO
 from typing import Generic, TypeVar
 
+import pandas as pd
 
 T = TypeVar("T")
 
diff --git a/tests/test_serializer.py b/tests/test_serializer.py
index d118ac0..dad0169 100644
--- a/tests/test_serializer.py
+++ b/tests/test_serializer.py
@@ -1,11 +1,9 @@
-from hypothesis import given
-from hypothesis.extra.pandas import data_frames, columns, range_indexes
-
+import pandas as pd
 from pandas.util.testing import assert_frame_equal
 
-import pandas as pd
-
 from demo.classes import CsvSerializer, ParquetSerializer
+from hypothesis import given
+from hypothesis.extra.pandas import columns, data_frames, range_indexes
 
 
 @given(