diff --git a/horizon/test/helpers.py b/horizon/test/helpers.py
index 5fcf58ee83..712c4899ff 100644
--- a/horizon/test/helpers.py
+++ b/horizon/test/helpers.py
@@ -35,6 +35,7 @@ from django.test.client import RequestFactory  # noqa
 from django.test import testcases
 from django.utils.encoding import force_text
 from django.utils import unittest
+import six
 
 if django.VERSION < (1, 7):
     from django.test import LiveServerTestCase  # noqa
@@ -169,6 +170,14 @@ class TestCase(django_test.TestCase):
         if hasattr(self.user, "_perm_cache"):
             del self.user._perm_cache
 
+    if six.PY3:
+        # Python 2 assert methods renamed in Python 3
+        def assertItemsEqual(self, expected_seq, actual_seq, msg=None):
+            self.assertCountEqual(expected_seq, actual_seq, msg)
+
+        def assertNotRegexpMatches(self, text, unexpected_regexp, msg=None):
+            self.assertNotRegex(text, unexpected_regexp, msg)
+
     def assertNoMessages(self, response=None):
         """Asserts that no messages have been attached by the
         ``contrib.messages`` framework.
diff --git a/tox.ini b/tox.ini
index 1161049715..1c31f2e7bb 100644
--- a/tox.ini
+++ b/tox.ini
@@ -24,6 +24,7 @@ commands =
     python manage.py test --settings=horizon.test.settings \
         horizon.test.tests.base \
         horizon.test.tests.forms \
+        horizon.test.tests.messages \
         horizon.test.tests.middleware \
         horizon.test.tests.tables.DataTableViewTests \
         horizon.test.tests.templatetags \