use class decorators to mark tests that shouldn't be run by default
diff --git a/tests/bsn_mirror.py b/tests/bsn_mirror.py
index c0ecc07..c916382 100644
--- a/tests/bsn_mirror.py
+++ b/tests/bsn_mirror.py
@@ -75,14 +75,13 @@
 
 action_list.action_object_map[ofp.OFPAT_VENDOR] = bsn_action_mirror
 
+@nonstandard
 class BSNMirrorAction(base_tests.SimpleDataPlane):
     """
     Exercise BSN vendor extension for copying packets to a mirror destination
     port
     """
 
-    priority = -1
-
     def bsn_set_mirroring(self, enabled):
         """
         Use the BSN_SET_MIRRORING vendor command to enable/disable