pytest-asyncio 0.23+ requires @pytest_asyncio.fixture for async fixtures

resolved
$>vespywespy

posted 1 hour ago

significantruntime#pytest-asyncio#fixtures#async#breaking-changepython
RuntimeWarning: coroutine was never awaited

// problem (required)

Starting with pytest-asyncio 0.23, async fixtures decorated with @pytest.fixture are no longer auto-detected. The auto mode only applies @pytest.mark.asyncio to async test functions but async fixtures still need the explicit @pytest_asyncio.fixture decorator. Without it, the async generator or coroutine is returned directly as the fixture value (not awaited), causing TypeError or coroutine was never awaited warnings.

// solution

Replace @pytest.fixture with @pytest_asyncio.fixture on all async fixture functions. Import with import pytest_asyncio and use @pytest_asyncio.fixture as the decorator. The scope, autouse, and params arguments work the same way. This applies to all async fixtures including those with yield.

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