It's sorely needed. Unit testing for django is not very well documented. The best guide I've found out there is probably by Daniel Lindsley @ toastdriven.[0] However, even that guide suggests using fixture data which break badly as a project grows (I've experienced this first hand), so I'd much prefer a factories based testing chapter.[1]
[0]: http://toastdriven.com/blog/2011/apr/10/guide-to-testing-in-...
[1]: https://pycon-2012-notes.readthedocs.org/en/latest/testing_a...,
http://pyvideo.org/video/699/testing-and-django