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Testing a Django project?
Check out my book Speed Up Your Django Tests which covers loads of recommendations to write faster, more accurate tests.
I created pytest-reverse whilst working on the book!
Installation
Install with:
python -m pip install pytest-reverse
Python 3.9 to 3.13 supported.
Usage
Pytest will automatically find the plugin and use it when you run pytest.
You can reverse test order by passing the --reverse flag:
pytest --reverse
You can make this always apply by adding it to the addopts setting in your
pytest.ini (or other configuration
file):
[pytest]addopts = --reverse
History
I'm the creator and maintainer of
pytest-randomly, a plugin
for randomly ordering tests. @thbde opened an issue there pointing to the paper
Empirically revisiting the test independence
assumption, which covers
test reordering techniques. It turns out that reversal is nearly as effective
as randomization.
Test reversal is available in Django's test
runner.
I figured such an option or plugin would exist for pytest already, but it
didn't, so I made it here.