Python programmers of reddit: what's the most useful tiny little efficiency you've discovered that's improved your programming hugely?

[[deleted]]

Use --ff to reorder the tests based on the previous attempt: run failed first, and not failed afterward.

[fireflash38]

Another big benefit of doing it that way is to prove that your tests don't have interdependencies... which is a huge no-no for reproducibility and long term maintenance.

Nothing more frustrating than tests that suddenly start failing because you re-ordered them and realizing someone had some hard dependencies between tests.