How to add the ``django_db`` mark to automatically generated tests?

[brianmay]

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I keep getting this error from pytest-django:

Failed: Database access not allowed, use the "django_db" mark, or the "db" or "transactional_db" fixtures to enable it.

However, I don't know how to add the django_db mark to tests automatically created with the scenarios() function. Some sort of documentation on how to do this would be great.

I also suspect this is the underlying reason for #187.