diff --git a/zuul.d/system-config-run.yaml b/zuul.d/system-config-run.yaml
index d3d813636f..1a1d7a041c 100644
--- a/zuul.d/system-config-run.yaml
+++ b/zuul.d/system-config-run.yaml
@@ -947,6 +947,8 @@
     vars:
       run_playbooks:
         - playbooks/service-kerberos.yaml
+        # Run twice to double-check idempotence
+        - playbooks/service-kerberos.yaml
       run_test_playbook: playbooks/test-kerberos.yaml
     files:
       - playbooks/bridge.yaml