Version 4.25.0 is available upstream. Please consider updating! It seems that version 4.25.0 is available upstream, while the latest version in the Gentoo tree is 4.24.2. This information is provided from Release-Monitoring, so fix association issues there.
Test automation tools. They are generally used to run the test suite across multiple Python versions, i.e. what our eclasses do for you already. They usually can't work inside network sandbox (since they fetch and install all the dependencies inside the venv), so even if they are listed in dependencies, your package probably does not actually need them to run tests.