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Watch the live stream: Watch on YouTube About the show Sponsored by Microsoft for Startups Founders Hub. Brian #1: Awesome pytest speedup Neyts Zupan A checklist of best practices to speed up your pytest suite. as a talk at Plone NAMUR 2022 Measure first Then make sure (all items have explanations) Hardware is fast use a faster computer also try a self-hosted runner seriously, a dedicated computer (or a few) for making test runs faster might be worth it. CI resources are usually slower in cloud than local, and even expensive VM farms are often slower. Try local Collection is fast utilize norecursedirs and specifying the location of the tests, either on the command line or with testpaths PYTHONDONTWRITEBYTECODE=1 is set might help Built-in pytest plugins are disabled try -p no:pastebin -p no:nose -p no:doctest Only a subset of tests are executed Especially when developing or debugging, run a subset and skip the slow tests. Network access is disabled pytest-socket can make sure of that Di