diff --git a/wagtail/tests/utils.py b/wagtail/tests/utils.py
index c44549401..9360f2206 100644
--- a/wagtail/tests/utils.py
+++ b/wagtail/tests/utils.py
@@ -1,4 +1,5 @@
 from django.contrib.auth.models import User
+from django.utils import six
 
 # We need to make sure that we're using the same unittest library that Django uses internally
 # Otherwise, we get issues with the "SkipTest" and "ExpectedFailure" exceptions being recognised as errors
@@ -21,3 +22,6 @@ class WagtailTestUtils(object):
         self.client.login(username='test', password='password')
 
         return user
+
+    def assertRegex(self, *args, **kwargs):
+        six.assertRegex(self, *args, **kwargs)