Fixed #24345 -- Isolated sitemaps_tests from contenttypes_tests; refs #11505

from django.apps import apps

from django.contrib.sites.models import Site

from django.core.cache import cache

from django.test import TestCase, modify_settings, override_settings

        # Create an object for sitemap content.

        TestModel.objects.create(name='Test Object')

        self.i18n_model = I18nTestModel.objects.create(name='Test Object')

    @classmethod

    def setUpClass(cls):

        super(SitemapTestsBase, cls).setUpClass()

        # This cleanup is necessary because contrib.sites cache

        # makes tests interfere with each other, see #11505

        Site.objects.clear_cache()