def test_removing_user_objects(self):
        """
        Must remove django User instance after 'app.models.TheUser' objects was deleted.
        """
        the_user3 = TheUser.objects.get(id_user__username='user3')
        the_user4 = TheUser.objects.get(id_user__email='user4@user4.com')

        the_user3.delete()
        the_user4.delete()

        self.assertEqual(User.objects.all().count(), 4)
        self.assertEqual(User.objects.all().count(), TheUser.objects.all().count())