diff --git a/keystoneclient/tests/v3/test_trusts.py b/keystoneclient/tests/v3/test_trusts.py
index 79c616b38..f47fc7fd3 100644
--- a/keystoneclient/tests/v3/test_trusts.py
+++ b/keystoneclient/tests/v3/test_trusts.py
@@ -97,4 +97,4 @@ class TrustTests(utils.TestCase, utils.CrudTests):
 
     def test_update(self):
         # Update not supported for the OS-TRUST API
-        self.assertRaises(exceptions.HTTPNotImplemented, self.manager.update)
+        self.assertRaises(exceptions.HttpNotImplemented, self.manager.update)