diff --git a/src/python/grpcio_tests/tests_aio/unit/close_channel_test.py b/src/python/grpcio_tests/tests_aio/unit/close_channel_test.py
index 111be3f1daf..9c6f0c24f41 100644
--- a/src/python/grpcio_tests/tests_aio/unit/close_channel_test.py
+++ b/src/python/grpcio_tests/tests_aio/unit/close_channel_test.py
@@ -36,9 +36,6 @@ class TestOngoingCalls(unittest.TestCase):
 
         class FakeCall(_base_call.RpcContext):
 
-            def __init__(self):
-                self.callback = None
-
             def add_done_callback(self, callback):
                 self.callback = callback