Double imports when migrating from standard Django tests

[andrejtokarcik]

A usual way to organize Django tests is to split up the tests.py file into a tests directory/module whose init file imports other test files in order to make them available for Django. This may cause a little trouble when adopting Django Sane Testing which does an automatic discovery (via nose) and thus may end up with some tests loaded and run twice.

A nose plugin to filter duplicates in the loaded tests list before running the tests, perhaps?