diff --git a/zuul.d/rocky_jobs.yaml b/zuul.d/rocky_jobs.yaml
index 211e896..5cb6125 100644
--- a/zuul.d/rocky_jobs.yaml
+++ b/zuul.d/rocky_jobs.yaml
@@ -615,6 +615,7 @@
       devstack_localrc:
         USE_PYTHON3: false
         TEMPEST_PLUGINS: '"/opt/stack/designate-tempest-plugin /opt/stack/neutron-tempest-plugin"'
+        ADVANCED_INSTANCE_TYPE: ds512M
     branches:
       - stable/rocky