title: Django test runner failing with "relation does not exist" error
body: <p>I'm seeing an error when running my tests, i.e. <code>$ ./manage.py test --settings=my.test.settings</code>
  <code>django.db.utils.ProgrammingError: relation "&lt;relation name&gt;" does not exist</code></p>
  
  <p>This is after running <code>./manage.py makemigrations &amp;&amp; migrate</code>.</p>