Web Reference: Apr 4, 2020 · To resolve the issue of running multiple @pytest.mark.asyncio tests raising RuntimeError('Event loop is closed'), you can run all tests within the same event loop by setting scope="session". Jan 2, 2024 · By understanding the reasons behind the Python asyncio RuntimeError: Event Loop is Closed, and by properly managing the event loop’s lifecycle, developers can avoid this common pitfall in asynchronous programming. Dec 6, 2023 · I am looking to use pytest-asyncio to create a fixture that spawns a subprocess and then kills the subprocess when the fixture teardown is complete. I've noticed that the event loop can be closed before the fixture teardown is complete, which can lead to the subprocess kill not working.
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