Change the unit test system to pytest with it's easy fixture system to replace the current json fixtures. * Consider using [pytest-django](https://pytest-django.readthedocs.io/en/latest/configuring_django.html) * Add [fixtures](https://docs.pytest.org/en/latest/fixture.html#fixture) for mirrorurls etc. * [Django testing documentation](https://docs.djangoproject.com/en/2.1/topics/testing/overview/)
Change the unit test system to pytest with it's easy fixture system to replace the current json fixtures.