diff --git a/zuul.d/system-config-run.yaml b/zuul.d/system-config-run.yaml
index 0dde030dfd..15093492c6 100644
--- a/zuul.d/system-config-run.yaml
+++ b/zuul.d/system-config-run.yaml
@@ -949,6 +949,8 @@
     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