diff --git a/lib/tempest b/lib/tempest
index c492182..1bb70c1 100644
--- a/lib/tempest
+++ b/lib/tempest
@@ -290,6 +290,7 @@
     fi
     if [ "$VIRT_DRIVER" = "xenserver" ]; then
         iniset $TEMPEST_CONFIG image disk_formats "ami,ari,aki,vhd,raw,iso"
+        iniset $TEMPEST_CONFIG scenario img_disk_format vhd
     fi
 
     # Image Features