diff --git a/tests/regressiontests/null_queries/models.py b/tests/regressiontests/null_queries/models.py
index 25560fbab7..9070dd4873 100644
--- a/tests/regressiontests/null_queries/models.py
+++ b/tests/regressiontests/null_queries/models.py
@@ -28,4 +28,5 @@ class OuterB(models.Model):
 
 class Inner(models.Model):
     first = models.ForeignKey(OuterA)
-    second = models.ForeignKey(OuterB, null=True)
+    # second would clash with the __second lookup.
+    third = models.ForeignKey(OuterB, null=True)
diff --git a/tests/regressiontests/null_queries/tests.py b/tests/regressiontests/null_queries/tests.py
index 47c99fbcb3..93e72d55d8 100644
--- a/tests/regressiontests/null_queries/tests.py
+++ b/tests/regressiontests/null_queries/tests.py
@@ -55,17 +55,17 @@ class NullQueriesTests(TestCase):
         """
         obj = OuterA.objects.create()
         self.assertQuerysetEqual(
-            OuterA.objects.filter(inner__second=None),
+            OuterA.objects.filter(inner__third=None),
             ['<OuterA: OuterA object>']
         )
         self.assertQuerysetEqual(
-            OuterA.objects.filter(inner__second__data=None),
+            OuterA.objects.filter(inner__third__data=None),
             ['<OuterA: OuterA object>']
         )
 
         inner_obj = Inner.objects.create(first=obj)
         self.assertQuerysetEqual(
-            Inner.objects.filter(first__inner__second=None),
+            Inner.objects.filter(first__inner__third=None),
             ['<Inner: Inner object>']
         )