diff --git a/tests/unit/test_streaming_connection_cleanup.py b/tests/unit/test_streaming_connection_cleanup.py
index c525e917b4c..b1699244738 100644
--- a/tests/unit/test_streaming_connection_cleanup.py
+++ b/tests/unit/test_streaming_connection_cleanup.py
@@ -39,6 +39,7 @@ async def test_aiohttp_transport_response_uses_stream_not_content():
             class Resp:
                 status = 200
                 headers = {}
+                raw_headers = ()
 
                 async def __aenter__(self):
                     return self