def test_clean_overwrite_url(self):
        user = AnonymousUser()
        user.is_superuser = True
        user.pk = 1
        request = type('Request', (object,), {'user': user})
        with SettingsOverride():
            data = {
                'title': 'TestPage',
                'slug': 'test-page',
                'language': 'en',
                'overwrite_url': '/overwrite/url/',
                'site': Site.objects.get_current().pk,
                'template': get_cms_setting('TEMPLATES')[0][0],
                'published': True
            }

            form = PageForm(data)
            self.assertTrue(form.is_valid(), form.errors.as_text())
            # WTF? WHY DOES form.save() not handle this stuff???
            instance = form.save()
            instance.permission_user_cache = user
            instance.permission_advanced_settings_cache = True
            Title.objects.set_or_create(request, instance, form, 'en')
            form = PageForm(data, instance=instance)
            self.assertTrue(form.is_valid(), form.errors.as_text())