title: Running django tutorial tests fail - No module named polls.tests
body: <p>I'm playing with django 1.6 tutorial but i can't run tests.
  My project (name mydjango) and app structure (name is polls) are as shown below in a virtualenv. (.nja files are just created by ninja-ide the ide I'm using)</p>
  
  <pre><code>.
  ├── __init__.py
  ├── manage.py
  ├── mydjango
  │   ├── __init__.py
  │   ├── __init__.pyc
  │   ├── mydjango.nja
  │   ├── settings.py
  │   ├── settings.pyc
  │   ├── templates
  │   │   └── admin
  │   │       └── base_site.html
  │   ├── urls.py
  │   ├── urls.pyc
  │   ├── wsgi.py
  │   └── wsgi.pyc
  ├── polls
  │   ├── admin.py
  │   ├── admin.pyc
  │   ├── __init__.py
  │   ├── __init__.pyc
  │   ├── models.py
  │   ├── models.pyc
  │   ├── templates
  │   │   ├── __init__.py
  │   │   └── polls
  │   │       ├── detail.html
  │   │       ├── index.html
  │   │       ├── __init__.py
  │   │       └── results.html
  │   ├── tests.py
  │   ├── tests.pyc
  │   ├── urls.py
  │   ├── urls.pyc
  │   ├── views.py
  │   └── views.pyc
  └── polls.nja
  </code></pre>
  
  <p>I followed the tutorial to understand how django works but I'm stuck in the test part.
  As tutorial suggest I created a file named tests.py into the app folder, the pretty straightforward file is:</p>
  
  <pre><code># -*- coding: utf-8 -*-
  from django.test import TestCase
  import datetime
  from django.utils import timezone
  from polls.models import Question
  
  # Create your tests here.l  
  class QuestionMethodTests(TestCase):
  
      def test_was_published_recently_with_future_poll(self):
          """
          was_published_recently dovrebbe ritornare falso se si mette una data nel futuro
          """
          future_question = Question(pub_date=timezone.now() + datetime.timedelta(hours=50))
          self.assertEqual(future_question.was_published_recently(), False)
  </code></pre>
  
  <p>then i installed unittest2 into the virtualenv with</p>
  
  <pre><code>$pip install unittest2
  </code></pre>
  
  <p>and run </p>
  
  <pre><code>$python manage.py test polls
  Creating test database for alias 'default'...
  E
  ======================================================================
  ERROR: mydjango.polls.tests (unittest2.loader.ModuleImportFailure)
  ----------------------------------------------------------------------
  ImportError: Failed to import test module: mydjango.polls.tests
  Traceback (most recent call last):
    File "/home/sergio/.virtualenvs/django4/local/lib/python2.7/site-packages/unittest2/loader.py", line 260, in _find_tests
      module = self._get_module_from_name(name)
    File "/home/sergio/.virtualenvs/django4/local/lib/python2.7/site-packages/unittest2/loader.py", line 238, in _get_module_from_name
      __import__(name)
  ImportError: No module named polls.tests
  
  
  ----------------------------------------------------------------------
  Ran 1 test in 0.001s
  
  FAILED (errors=1)
  Destroying test database for alias 'default'...
  </code></pre>
  
  <p>No way to have the test working, also if don't pass the app name it returns the same error: </p>
  
  <pre><code>$ python manage.py test
  Creating test database for alias 'default'...
  E
  ======================================================================
  ERROR: mydjango.polls.tests (unittest2.loader.ModuleImportFailure)
  ----------------------------------------------------------------------
  ImportError: Failed to import test module: mydjango.polls.tests
  Traceback (most recent call last):
    File "/home/sergio/.virtualenvs/django4/local/lib/python2.7/site-packages/unittest2/loader.py", line 260, in _find_tests
      module = self._get_module_from_name(name)
    File "/home/sergio/.virtualenvs/django4/local/lib/python2.7/site-packages/unittest2/loader.py", line 238, in _get_module_from_name
      __import__(name)
  ImportError: No module named polls.tests
  
  
  ----------------------------------------------------------------------
  Ran 1 test in 0.001s
  
  FAILED (errors=1)
  Destroying test database for alias 'default'...
  </code></pre>
  
  <p>My INSTALLED_APPS are:</p>
  
  <pre><code>INSTALLED_APPS = (
      'south',
      'django.contrib.admin',
      'django.contrib.auth',
      'django.contrib.contenttypes',
      'django.contrib.sessions',
      'django.contrib.messages',
      'django.contrib.staticfiles',
      'polls',
  )
  </code></pre>
  
  <p>What am I doing wrong?</p>