diff --git a/.zuul.yaml b/.zuul.yaml
index df5770ec62..05ba8defdc 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -36,6 +36,8 @@
       Takes advantage of the base tox job's install-siblings feature.
     # The job only tests the latest and shouldn't be run on the stable branches
     branches: ^master$
+    # TODO(tkajinam): Make this voting once oslo.utils is bumped to 6.3.0
+    voting: false
     required-projects:
       - name: github.com/sqlalchemy/sqlalchemy
         override-checkout: main
diff --git a/nova/tests/unit/objects/test_objects.py b/nova/tests/unit/objects/test_objects.py
index 6ae1de1b24..5ccb32e613 100644
--- a/nova/tests/unit/objects/test_objects.py
+++ b/nova/tests/unit/objects/test_objects.py
@@ -1040,6 +1040,7 @@ class TestArgsSerializer(test.NoDBTestCase):
 class TestRegistry(test.NoDBTestCase):
     @mock.patch('nova.objects.base.objects')
     def test_hook_chooses_newer_properly(self, mock_objects):
+        del mock_objects.MyObj
         reg = base.NovaObjectRegistry()
         reg.registration_hook(MyObj, 0)
 
@@ -1056,6 +1057,7 @@ class TestRegistry(test.NoDBTestCase):
 
     @mock.patch('nova.objects.base.objects')
     def test_hook_keeps_newer_properly(self, mock_objects):
+        del mock_objects.MyObj
         reg = base.NovaObjectRegistry()
         reg.registration_hook(MyObj, 0)