diff --git a/etc/tempest.conf.sample b/etc/tempest.conf.sample
index 247f6d1..29f80bd 100644
--- a/etc/tempest.conf.sample
+++ b/etc/tempest.conf.sample
@@ -933,8 +933,15 @@
 # Directory containing image files (string value)
 #img_dir=/opt/stack/new/devstack/files/images/cirros-0.3.1-x86_64-uec
 
-# QCOW2 image file name (string value)
-#qcow2_img_file=cirros-0.3.1-x86_64-disk.img
+# Image file name (string value)
+# Deprecated group/name - [DEFAULT]/qcow2_img_file
+#img_file=cirros-0.3.1-x86_64-disk.img
+
+# Image disk format (string value)
+#img_disk_format=qcow2
+
+# Image container format (string value)
+#img_container_format=bare
 
 # AMI image file name (string value)
 #ami_img_file=cirros-0.3.1-x86_64-blank.img