diff --git a/tests/test_coder.py b/tests/test_coder.py
index 037049022..61b60cc79 100644
--- a/tests/test_coder.py
+++ b/tests/test_coder.py
@@ -2,6 +2,8 @@ import os
 import unittest
 from unittest.mock import MagicMock, patch
 
+import openai
+
 from aider.coder import Coder
 
 
@@ -117,7 +119,6 @@ class TestCoder(unittest.TestCase):
         # Assert that the returned message is the expected one
         self.assertEqual(result, 'a good "commit message"')
 
-
     @patch("aider.coder.openai.ChatCompletion.create")
     @patch("aider.coder.time.sleep")
     def test_send_with_retries_rate_limit_error(self, mock_sleep, mock_chat_completion_create):
@@ -127,8 +128,12 @@ class TestCoder(unittest.TestCase):
         # Initialize the Coder object with the mocked IO and mocked repo
         coder = Coder(io=mock_io, openai_api_key="fake_key")
 
-        # Set up the mock to raise RateLimitError on the first call and return None on the second call
-        mock_chat_completion_create.side_effect = [openai.error.RateLimitError("Rate limit exceeded"), None]
+        # Set up the mock to raise RateLimitError on
+        # the first call and return None on the second call
+        mock_chat_completion_create.side_effect = [
+            openai.error.RateLimitError("Rate limit exceeded"),
+            None,
+        ]
 
         # Call the send_with_retries method
         coder.send_with_retries("model", ["message"])
@@ -136,5 +141,6 @@ class TestCoder(unittest.TestCase):
         # Assert that time.sleep was called once
         mock_sleep.assert_called_once()
 
+
 if __name__ == "__main__":
     unittest.main()