title: Mocking Django Storages Model ImageField backend S3
body: <p>I have a model with an ImageField that is backed by django-storages' S3Boto.  I have a test the exercises the "upload image" view, but the fact that it is uploading the image to S3 is slowing down my test suite.</p>
  
  <p>In the interest of speeding up my tests, what is the best practice for dealing with this issue?  Should I mock out S3Boto?  Perhaps there is a memory backed storage backend that works well for testing (automatic cleanup would be nice!)?</p>