diff --git a/zuul.d/devstack-tobiko-designate.yaml b/zuul.d/devstack-tobiko-designate.yaml
index 7da574b..8a95820 100644
--- a/zuul.d/devstack-tobiko-designate.yaml
+++ b/zuul.d/devstack-tobiko-designate.yaml
@@ -27,7 +27,6 @@
     vars: &VARS
       devstack_localrc:
         API_WORKERS: 4
-        DESIGNATE_SERVICE_PORT_DNS: 5322
       devstack_plugins:
         designate: https://opendev.org/openstack/designate.git
       devstack_services: