diff --git a/tests/pktact.py b/tests/pktact.py
index 2f9267b..67aa9bb 100644
--- a/tests/pktact.py
+++ b/tests/pktact.py
@@ -2046,6 +2046,8 @@
     Verify the packet is received at the egress port only
     """
 
+    priority = -1 # no-op base class
+
     RESULT_MATCH = "MATCH"
     RESULT_NOMATCH = "NO MATCH"
     RESULT_ANY = "ANY MATCH"