Printout for unknown pytest mark

[koubaa]

When running pytest, I see this printout:

Example:

pymechanical/tests/test_pool.py:137
  /work/pymechanical/tests/test_pool.py:137: PytestUnknownMarkWarning: Unknown pytest.mark.remote_session_launch - is this a typo?  You can register custom marks to avoid this warning - for details, see https://docs.pytest.org/en/stable/how-to/mark.html
    @pytest.mark.remote_session_launch

There might be a mistake in how this mark is defined