dev-python/
ebuildtester

A dockerized approach to test a Gentoo package within a clean stage3 container

https://ebuildtester.readthedocs.io/

There are no pull requests

You think something is missing here?
Start with filling a new pull requests.

If you also like to help the Gentoo project, you can consider sending a Pull Request via GitHub.
Before doing so, you might want to take a look at the wiki page.