Test case execution order in pytest

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In general you can configure the behavior of basically any part of pytest using its well-specified hooks.

In your case, you want the “pytest_collection_modifyitems” hook, which lets you re-order collected tests in place.

That said, it does seem like ordering your tests should be easier — this is Python after all! So I wrote a plugin for ordering tests: “pytest-ordering”. Check out the docs or install it from pypi. Right now I recommend using @pytest.mark.first and @pytest.mark.second, or one of the @pytest.mark.order# markers, but I have some ideas about more useful APIs. Suggestions welcome 🙂

Edit: pytest-ordering seems abandoned at the moment, you can also check out pytest-order (a fork of the original project by the author).

Edit2: In pytest-order, only one marker (order) is supported, and the mentioned examples would read @pytest.mark.order("first"), @pytest.mark.order("second"), or @pytest.mark.order(#) (with # being any number).

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