diff --git a/tests/pillar/master_cluster.sls b/tests/pillar/master_cluster.sls
index a2c98fd..2d03b69 100644
--- a/tests/pillar/master_cluster.sls
+++ b/tests/pillar/master_cluster.sls
@@ -1,5 +1,6 @@
 kubernetes:
   common:
+    cluster_domain: cluster.local
     network:
       engine: none
     hyperkube: