diff --git a/cinder/tests/unit/test_test.py b/cinder/tests/unit/test_test.py
index b59244c1ac8..659f8e156e4 100644
--- a/cinder/tests/unit/test_test.py
+++ b/cinder/tests/unit/test_test.py
@@ -38,8 +38,13 @@ class IsolationTestCase(test.TestCase):
     def test_rpc_consumer_isolation(self):
         class NeverCalled(object):
 
-            def __getattribute__(*args):
-                self.fail(msg="I should never get called.")
+            def __getattribute__(self, name):
+                if name == 'target':
+                    # oslo.messaging 5.31.0 explicitly looks for 'target'
+                    # on the endpoint and checks it's type, so we can't avoid
+                    # it here, just ignore it if that's the case.
+                    return
+                self.fail(msg="I should never get called. name: %s" % name)
 
         server = rpc.get_server(messaging.Target(topic='volume',
                                                  server=cfg.CONF.host),