diff --git a/tests/pillar/maas_cluster.sls b/tests/pillar/maas_cluster.sls
index dc16599..8e6c738 100644
--- a/tests/pillar/maas_cluster.sls
+++ b/tests/pillar/maas_cluster.sls
@@ -5,6 +5,7 @@
       host: localhost
     role: slave
   region:
+    theme: theme
     bind:
       host: localhost
       port: 80