Troubleshooting

This section describes common errors you might encounter working with Testcontainers in the Python environment.

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Error on running tests with pytest: ScopeMismatch: You tried to access the function scoped fixture event_loop with a session scoped request object, involved factories.

Problem: the error occurs when you're using asynchronous fixtures with a scope higher than function, e.g., fixture moto_container has session scope. The default event_loop fixture provided by pytest-asyncio is a function-scoped fixture, so it can't be used with session-scoped fixtures.

Solution: override the event_loop fixture with a session-scoped fixture by placing it in your project's default conftest.py.

tests/conftest.py

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