diff --git a/tests/pillar/server.sls b/tests/pillar/server.sls
index 3e01819..a7383dc 100644
--- a/tests/pillar/server.sls
+++ b/tests/pillar/server.sls
@@ -3,4 +3,5 @@
     enabled: true
     identity: cloud1
     image_location: http://download.cirros-cloud.net/0.3.4/cirros-0.3.4-x86_64-disk.img
+    disk_format: qcow2
     public_network: INET1
\ No newline at end of file