Clears warning:
tests/test_build_linkcheck.py::test_connect_to_selfsigned_with_tls_cacerts
tests/test_build_linkcheck.py::test_connect_to_selfsigned_with_requests_env_var
…/venv/lib/python3.8/site-packages/urllib3/connection.py:455: SubjectAltNameWarning: Certificate for localhost has no `subjectAltName`, falling back to check for a `commonName` for now. This feature is being removed by major browsers and deprecated by RFC 2818. (See https://github.com/urllib3/urllib3/issues/497 for details.)
warnings.warn(