title: PyCharm throws "AttributeError: 'module' object has no attribute" when running tests for no reason
body: <p>So, I have a Django-REST Framework project and one day it simply ceased being able to run the tests within PyCharm.</p>
  
  <p>From the command line I can run them both using <code>paver</code> or the <code>manage.py</code> directly.</p>
  
  <p>There was a time when that would happen when we didn't import the class' superclass at the top of the file, but that's not the case.</p>
  
  <p>We have a <code>virtualenv</code> set locally and run the server from a vagrant box. I assured the virtual environment is loaded and that the project's Interpreter is using the afore mentioned virtual env.</p>
  
  <p>No clue on what's the matter.</p>