diff --git a/Lib/test/test_asyncio/test_subprocess.py b/Lib/test/test_asyncio/test_subprocess.py
@@ -228,6 +228,7 @@ def test_stdin_broken_pipe(self):
        proc, large_data = self.prepare_broken_pipe_test()

        async def write_stdin(proc, data):
            proc.stdin.write(data)
            await proc.stdin.drain()