title: "Empty test suite" by running Django tests with Pycharm (tests are found if launched from the shell)
body: <p>I'm having an hard time trying to run my <strong>Django</strong> tests using <strong>PyCharm</strong>.
  I did it easily in the past using a "python running configuration" in which I used <code>manage.py</code> to run them, I was on OSX and using python 2.7, Django &lt;= 1.7, Pycharm &lt;= 4.
  Now I'm on Linux Mint, I use Python 3.4.3, Django 1.8.2 and Pycharm 4.5.
  I always used virtualenv to manage my projects.
  Now by running "manage.py test" from Pycharm no tests are found (it prints "Empty test suite").
  But tests exist, and if I run the command from the shell they get executed.
  So I really don't understand what's going on.
  I'm actually able to launch tests using "an hack" I created, but the problem is that Pycharm is not able to attach to the process in order to allow breakpoints in tests (which is one of the features I use the most!).
  My "hack" is the following:</p>
  
  <p>I created a python script with:</p>
  
  <pre><code>import subprocess
  
  
  def main():
      subprocess.call('./venv_activator.sh', shell=True)
  
  
  if __name__ == '__main__':
      main()
  </code></pre>
  
  <p>then a bash script (<code>venv_activator.sh</code>):</p>
  
  <pre><code>#!/usr/bin/env bash
  source .ENV/bin/activate
  python manage.py test myapp -p "*_tests.py" --noinput -v 2 --settings=settings.test
  </code></pre>
  
  <p>In practice the python script is used to create a "python running configuration" for Pycharm, then it activate the virtualenv and invokes the django test command.</p>
  
  <p>ps: yes, I turned on "Django support" in PyCharm (and I configured the python interpreter under the virtualenv)</p>