ROOT: tox-gh-actions won't override envlist because tox is not running in GitHub Actions
py$(PYV): remove tox env folder $(@D)/.tox/py$(PYV)
py$(PYV): commands[0]> python -m testtools.run fixtures.test_suite
$(PYTHON_DIR)/runpy.py:125: RuntimeWarning: 'testtools.run' found in sys.modules after import of package 'testtools', but prior to execution of 'testtools.run'; this may result in unpredictable behaviour
  warn(RuntimeWarning(msg))
Tests running...

Ran 145 tests
OK
  py$(PYV): OK
  congratulations :)