Testing django with mongodb (mongoengine) and redis

Be default, django only provides support for testing relational databases. I have project which uses mongodb (with mongoengine) as primary database, along with persistent redis for other database needs. I know the way to go is to overwrite TestCase class already provided by django, for different database systems.

But is there any library for django already written for this purpose, so that I don't need to reinvent the wheel?