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# Detect Hypothesis tests

How to dynamically determine whether a test function has been defined with Hypothesis.

## Via `is_hypothesis_test`

The most straightforward way is to use `is_hypothesis_test()`:

    from hypothesis import is_hypothesis_test

    @given(st.integers())
    def f(n): ...

    assert is_hypothesis_test(f)

This works for stateful tests as well:

    from hypothesis import is_hypothesis_test
    from hypothesis.stateful import RuleBasedStateMachine

    class MyStateMachine(RuleBasedStateMachine): ...

    assert is_hypothesis_test(MyStateMachine.TestCase().runTest)

## Via pytest

If you’re working with pytest, the Hypothesis pytest plugin automatically adds the `@pytest.mark.hypothesis` mark to all Hypothesis tests. You can use `node.get_closest_marker("hypothesis")` or similar methods to detect the existence of this mark.