title: Django test error
body: <p>When running <code>python manage.py test myapp2</code>, I get this error:</p>
  
  <pre><code>Creating test database for alias 'default'...
  Problem installing fixture '... project folder .../mymainapp/fixtures/initial_data.yaml': Traceback (most recent call last):
    File "... project folder .../venv/lib/python2.7/site-packages/django/core/management/commands/loaddata.py", line 196, in handle
      obj.save(using=using)
    File "... project folder .../venv/lib/python2.7/site-packages/django/core/serializers/base.py", line 165, in save
      models.Model.save_base(self.object, using=using, raw=True)
    File "... project folder .../venv/lib/python2.7/site-packages/django/db/models/base.py", line 524, in save_base
      manager.using(using).filter(pk=pk_val).exists())):
    File "... project folder .../venv/lib/python2.7/site-packages/django/db/models/query.py", line 565, in exists
      return self.query.has_results(using=self.db)
    File "... project folder .../venv/lib/python2.7/site-packages/django/db/models/sql/query.py", line 441, in has_results
      return bool(compiler.execute_sql(SINGLE))
    File "... project folder .../venv/lib/python2.7/site-packages/django/db/models/sql/compiler.py", line 818, in execute_sql
      cursor.execute(sql, params)
    File "... project folder .../venv/lib/python2.7/site-packages/django/db/backends/postgresql_psycopg2/base.py", line 52, in execute
      return self.cursor.execute(query, args)
  DatabaseError: Could not load myapp2.table2(pk=1): relation "myapp2_table2" does not exist
  LINE 1: SELECT (1) AS "a" FROM "myapp2_table2" WHERE "myapp2...
                                 ^
  </code></pre>
  
  <p>However, all of the actual tests run fine, so it appears the fixture is indeed getting successfully installed. I can also successfully install those fixtures when running South migrations.</p>
  
  <p>What can I do to fix this error, even though it doesn't seem to affect anything? It seems to have occurred only after I hand-crafted a South migration.</p>