diff --git a/tests/indexes/models.py b/tests/indexes/models.py
index dc384ab4891..abd3b0584a5 100644
--- a/tests/indexes/models.py
+++ b/tests/indexes/models.py
@@ -19,7 +19,7 @@ class CurrentTranslation(models.ForeignObject):
 class ArticleTranslation(models.Model):
 
     article = models.ForeignKey('indexes.Article', models.CASCADE)
-    article_no_constraint = models.ForeignKey('indexes.Article', models.CASCADE, db_constraint=False)
+    article_no_constraint = models.ForeignKey('indexes.Article', models.CASCADE, db_constraint=False, related_name='+')
     language = models.CharField(max_length=10, unique=True)
     content = models.TextField()