diff --git a/cacheunittest.py b/cacheunittest.py
index 6ec58b2..f24813a 100644
--- a/cacheunittest.py
+++ b/cacheunittest.py
@@ -181,6 +181,6 @@ def assertBackend(self, response, backend):
         self.assertEqual(response.headers['X-Back'].lower(), backend.lower())
 
     def assertRedirectURL(self, response, url):
-        self.assertEqual(response.reason.lower(), url.lower())
+        self.assertEqual(response.location.lower(), url.lower())