#PyPA #virtualenv is yet another #Python project that "optimizes" its test suite by using time-machine. Since time-machine works on CPython only, it also keeps supporting #freezegun but you are allowed to use it on PyPy only now.

I really do wonder if this "optimization" actually makes anything faster, and if it outweighs the added complexity. The complexity also falls on downstreams (#Gentoo).

But that's modern development for you! "Shiny! Must have it!"

https://github.com/pypa/virtualenv/commit/fd93dd79be89b21e6e9d43ca2dd1b02b811f6d6f