1 files changed, 6 insertions, 2 deletions
diff --git a/tests/basic/models.py b/tests/basic/models.py
index 86d0f0c4e4..0e85087d32 100644
--- a/tests/basic/models.py
+++ b/tests/basic/models.py
@@ -28,8 +28,12 @@ class ArticleSelectOnSave(Article):
 
 @python_2_unicode_compatible
 class SelfRef(models.Model):
-    selfref = models.ForeignKey('self', null=True, blank=True,
-                                related_name='+')
+    selfref = models.ForeignKey(
+        'self',
+        models.SET_NULL,
+        null=True, blank=True,
+        related_name='+',
+    )
 
     def __str__(self):
         # This method intentionally doesn't work for all cases - part