new_contents: from survey.tests import BaseTest
  from django.test import override_settings
  from django.conf import settings
  from django.test import tag
  from survey import set_default_settings
  
  
  @tag("set")
  @override_settings()
  class TestDefaultSettings(BaseTest):
      def test_set_choices_separator(self):
          url = "/admin/survey/survey/1/change/"
          del settings.CHOICES_SEPARATOR
          self.login()
          with self.assertRaises(AttributeError):
              self.client.get(url)
          set_default_settings()
          response = self.client.get(url)
          self.assertEqual(response.status_code, 200)
  
subject: Test for setting CHOICES_SEPARATOR