diff --git a/nova/tests/unit/virt/disk/mount/test_api.py b/nova/tests/unit/virt/disk/mount/test_api.py
index baaa81ae7d93..b92f43abf47b 100644
--- a/nova/tests/unit/virt/disk/mount/test_api.py
+++ b/nova/tests/unit/virt/disk/mount/test_api.py
@@ -28,6 +28,8 @@ AUTOMAP_PARTITION = "/dev/nullp77"
 MAP_PARTITION = "/dev/mapper/nullp77"
 
 
+# Make RetryDecorator not actually sleep on retries
+@mock.patch('oslo_service.loopingcall._ThreadingEvent.wait', new=mock.Mock())
 class MountTestCase(test.NoDBTestCase):
     def _test_map_dev(self, partition):
         mount = api.Mount(mock.sentinel.image, mock.sentinel.mount_dir)
diff --git a/nova/tests/unit/virt/libvirt/test_guest.py b/nova/tests/unit/virt/libvirt/test_guest.py
index d34b22ac44fb..b7f484e1abf2 100644
--- a/nova/tests/unit/virt/libvirt/test_guest.py
+++ b/nova/tests/unit/virt/libvirt/test_guest.py
@@ -34,6 +34,8 @@ if sys.version_info > (3,):
     long = int
 
 
+# Make RetryDecorator not actually sleep on retries
+@mock.patch('oslo_service.loopingcall._ThreadingEvent.wait', new=mock.Mock())
 class GuestTestCase(test.NoDBTestCase):
 
     def setUp(self):