Fix unawaited coroutine warning in test_default_timeout_is_600

The AsyncMock for wait_for discarded the coroutine from
proc.communicate() without consuming it. Replace with a side_effect
that closes the coroutine before returning the mock result.

packages/codeflash-python/tests/test_test_runner.py

@@ -736,17 +736,20 @@ class TestAsyncExecuteTestSubprocess:
             mock_proc.returncode = 0
             mock_create.return_value = mock_proc
 
+            async def _consume_coro(coro, *, timeout):
+                coro.close()
+                return (b"out", b"err")
+
             with patch(
                 "codeflash_python.testing._test_runner.asyncio.wait_for",
-                new_callable=AsyncMock,
+                side_effect=_consume_coro,
             ) as mock_wait:
-                mock_wait.return_value = (b"out", b"err")
                 await async_execute_test_subprocess(
                     ["pytest"],
                     cwd=Path("/project"),
                     env=None,
                 )
-                assert 600 == mock_wait.call_args[1]["timeout"]
+                assert 600 == mock_wait.call_args.kwargs["timeout"]
 
     @pytest.mark.asyncio
     async def test_empty_stdout_returns_empty_string(self) -> None: