Tests for [12744], which were accidentally left out of the commit. Refs #13071.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@12745 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/regressiontests/model_fields/models.py

@@ -63,7 +63,11 @@ class BigInt(models.Model):
 class Post(models.Model):
     title = models.CharField(max_length=100)
     body = models.TextField()
-    
+
+class NullBooleanModel(models.Model):
+    nbfield = models.NullBooleanField()
+
+
 ###############################################################################
 # ImageField