diff --git a/tests/test_coder.py b/tests/test_coder.py
index efc180878..863998ac6 100644
--- a/tests/test_coder.py
+++ b/tests/test_coder.py
@@ -60,6 +60,21 @@ class TestCoder(unittest.TestCase):
 
         self.assertEqual(coder.abs_fnames, set())
 
+    def test_get_commit_message(self):
+        # Mock the IO object
+        mock_io = MagicMock()
+
+        # Initialize the Coder object with the mocked IO and mocked repo
+        coder = Coder(io=mock_io, openai_api_key="fake_key")
+
+        # Mock the send method to return a tuple with a message and False
+        coder.send = MagicMock(return_value=("a good commit message", False))
+
+        # Call the get_commit_message method with dummy diff and context
+        result = coder.get_commit_message("dummy diff", "dummy context")
+
+        # Assert that the returned message is the expected one
+        self.assertEqual(result, "a good commit message")
 
 if __name__ == "__main__":
     unittest.main()