diff --git a/tests/regressiontests/model_regress/tests.py b/tests/regressiontests/model_regress/tests.py
index 48b0f70f679..a1035906717 100644
--- a/tests/regressiontests/model_regress/tests.py
+++ b/tests/regressiontests/model_regress/tests.py
@@ -1,6 +1,7 @@
 import datetime
 from operator import attrgetter
 
+from django.core.exceptions import ValidationError
 from django.test import TestCase, skipUnlessDBFeature
 from django.utils import tzinfo