def test_expired_user_deletion(self):
        new_user = RegistrationProfile.objects.create_inactive_user(site=Site.objects.get_current(),
                                                                    **self.user_info)
        expired_user = RegistrationProfile.objects.create_inactive_user(site=Site.objects.get_current(),
                                                                        username='bob',
                                                                        password='secret',
                                                                        email='bob@example.com')
        expired_user.date_joined -= datetime.timedelta(days=settings.ACCOUNT_ACTIVATION_DAYS + 1)
        expired_user.save()

        RegistrationProfile.objects.delete_expired_users()
        self.assertEqual(RegistrationProfile.objects.count(), 1)
        self.assertRaises(User.DoesNotExist, User.objects.get, username='bob')
``RegistrationProfile.objects.delete_expired_users()`` only
dataset/ETHPy150Open codesters/codesters/registration/tests/models.py/RegistrationModelTests.test_expired_user_deletion