Is it potentially worth mentioning both options here? I tend to use cargo test to selectively run the ones I care about (and it's much quicker), though I agree most contributors would benefit from having this recommendation.

There's also nox -s test-rust 😅

But yes, for running a specific test cargo test is probably still best, I'll add a sentence.

Oh, and for adding a hint how to run Rust tests, is there a way to run a specific test from pytests?

I think cd pytests && nox -s test -- -k <test> (the -k switch goes to underlying pytest execution)

Or nox -f pytests/noxfile.py -s test -- -k <test> to avoid the cd.