diff --git a/gcsfs/tests/test_checkers.py b/gcsfs/tests/test_checkers.py
index 2f3fd329..30b84a62 100644
--- a/gcsfs/tests/test_checkers.py
+++ b/gcsfs/tests/test_checkers.py
@@ -25,7 +25,9 @@ class response:
     return response
 
 
-def google_response_from_data_with_reverse_header_order(expected_data: bytes, actual_data=None):
+def google_response_from_data_with_reverse_header_order(
+    expected_data: bytes, actual_data=None
+):
     actual_data = actual_data or expected_data
     checksum = md5(actual_data)
     checksum_b64 = base64.b64encode(checksum.digest()).decode("UTF-8")