diff --git a/model_utils/tests/models.py b/model_utils/tests/models.py
index 9e2cfe7..0513a45 100644
--- a/model_utils/tests/models.py
+++ b/model_utils/tests/models.py
@@ -191,7 +191,7 @@ class AbidingManager(PassThroughManager):
 class Dude(models.Model):
     abides = models.BooleanField(default=True)
     name = models.CharField(max_length=20)
-    has_rug = models.BooleanField()
+    has_rug = models.BooleanField(default=False)
 
     objects = PassThroughManager(DudeQuerySet)
     abiders = AbidingManager()