diff --git a/tests/regressiontests/backends/models.py b/tests/regressiontests/backends/models.py
index 69575cb429..7315408d49 100644
--- a/tests/regressiontests/backends/models.py
+++ b/tests/regressiontests/backends/models.py
@@ -41,7 +41,7 @@ if settings.DATABASES[DEFAULT_DB_ALIAS]['ENGINE'] != 'django.db.backends.mysql':
 
 class Tag(models.Model):
     name = models.CharField(max_length=30)
-    content_type = models.ForeignKey(ContentType)
+    content_type = models.ForeignKey(ContentType, related_name='backend_tags')
     object_id = models.PositiveIntegerField()
     content_object = generic.GenericForeignKey('content_type', 'object_id')