title: Custom user model breaks auth tests
body: <p>Hecko out there,</p>
  
  <p>I’m using a custom user model that I’ve opted to call Member, which extends the default user model (pretty much as described <a href="http://scottbarnham.com/blog/2008/08/21/extending-the-django-user-model-with-inheritance/" rel="nofollow">here</a>).</p>
  
  <p>The rub is that this breaks several tests of the auth app, because the test fixture only creates standard <em>users</em>, not <em>members</em>. When I add the missing <em>member</em> definitions/rows to django/contrib/auth/fixtures/authtestdata.json they run again, but that’s of course no solution.</p>
  
  <p>Is this is a result of me doing something wrong, and how should I best go about fixing it?</p>
  
  <p>As a last recourse, I would just add a patch for authtestdata.json in Buildout, but perhaps there is a more elegant solution.</p>
  
  <p>Thanks a lot,<br>
  Telofy</p>