pytest-django builds incorrect database names with pytest 5.3.3 and pytest-xdist

[rixx]

pytet 5.3.3 was just released today, and pytest-django performs very slowly and incorrectly when run with pytest-xdist. There is a tracking issue up at pytest-dev/pytest#6492, which includes a git-bisect run and a more detailed description.

The tl;dr is that due to a change in fixture handling, pytest-django plus pytest-xdist build increasingly long database names until you reach errors such as django.core.exceptions.ImproperlyConfigured: The database name 'test_travis_ci_test_gw0_gw0_gw0_gw0_gw0_gw0_gw0_gw0_gw0_gw0_gw0_gw0_gw0' (71 characters) is longer than PostgreSQL's limit of 63 characters. Supply a shorter NAME in settings.DATABASES., while performing very slowly.

[blueyed]

Yeah, tests/test_db_setup.py::TestSqliteWithToxAndXdist::test_db_with_tox_suffix shows the failure.

[rixx]

The other issue has by now determined that this is a problem that occurs around differently scoped fixtures and their teardown, so it's not pytest-django specific. Apologies for the duplicate issue.