pip install pytest-diff-selector

cd [git-project-you-want-scanning]
selector HEAD^  # scan last commit
tests/test_something.py::test_01

selector HEAD   # scan unstaged/uncommited work
tests/test_something.py::test_01

When having a long integration tests you want your CI extra smarter and don't waste time on irrelevant tests

Figuring out which tests are affect by specific code changes It's scanning all the project python files and build a call graph using AST, and scans this graph to find paths that are part to the change (by line numbers from the diff) that leads to a test

Currently it's only a commandline tool, but it should become a full fledged pytest plugin