Fixed #14920 -- Fixed some test failures caused by caching contenttyp…

…es that were loaded during a contenttype fixture test. Thanks to Karen for the report.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@14985 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/contrib/auth/tests/permissions.py

@@ -11,6 +11,12 @@
 
 
 class TestAuthPermissions(TestCase):
+    def tearDown(self):
+        # These tests mess with content types, but content type lookups
+        # are cached, so we need to make sure the effects of this test
+        # are cleaned up.
+        contenttypes_models.ContentType.objects.clear_cache()
+
     def test_permission_register_order(self):
         """Test that the order of registered permissions doesn't break"""
         # Changeset 14413 introduced a regression in the ordering of