Collect nuggets of wisdom from the development of this software, for future reference.
I started to use Hatch for project management. The tests stopped working. Had to copy some configuration from a blank Hatch project. The tests still not working (No combination of relative imports worked.). Then, I stumbled upon a Stack Overflow answer This one! and had the idea of including pythonpath
to the test environment configuration. Everything started to work smoothly. Cool!