diff --git a/testbench/common.py b/testbench/common.py
index 5b1f405a..5f7e2433 100644
--- a/testbench/common.py
+++ b/testbench/common.py
@@ -893,6 +893,7 @@ def wrapper(*args, **kwargs):
 
     return retry_test
 
+
 def get_stall_uploads_after_bytes(
     database, request, context=None, transport="HTTP"
 ):
@@ -948,6 +949,7 @@ def get_retry_uploads_error_after_bytes(
 
     return 0, 0, ""
 
+
 def handle_stall_uploads_after_bytes(
     upload,
     data,
diff --git a/testbench/rest_server.py b/testbench/rest_server.py
index 11c06d02..2efddee3 100644
--- a/testbench/rest_server.py
+++ b/testbench/rest_server.py
@@ -1170,7 +1170,6 @@ def resumable_upload_chunk(bucket_name):
         return upload.resumable_status_rest(override_308=override_308)
 
 
-
 @upload.route("/b/<bucket_name>/o", methods=["DELETE"])
 @retry_test(method="storage.objects.delete")
 def delete_resumable_upload(bucket_name):
diff --git a/tests/test_testbench_retry.py b/tests/test_testbench_retry.py
index 9c7cf7d6..668fd3d8 100644
--- a/tests/test_testbench_retry.py
+++ b/tests/test_testbench_retry.py
@@ -665,18 +665,22 @@ def test_write_retry_test_stall_after_bytes(self):
         # Setup a stall for reading back the object.
         response = self.client.post(
             "/retry_test",
-            data=json.dumps({
-                "instructions": {
-                    "storage.objects.insert": [
-                        "stall-for-1s-after-250K",
-                        "stall-for-1s-after-300K"
-                    ]
+            data=json.dumps(
+                {
+                     "instructions": {
+                        "storage.objects.insert": [
+                            "stall-for-1s-after-250K",
+                            "stall-for-1s-after-300K"
+                        ]
+                     }
                 }
-            }),
+            ),
             content_type='application/json'
         )
         self.assertEqual(response.status_code, 200)
-        self.assertTrue(response.headers.get("content-type").startswith("application/json"))
+        self.assertTrue(
+            response.headers.get("content-type").startswith("application/json")
+        )
 
         create_rest = json.loads(response.data)
         self.assertIn("id", create_rest)