diff --git a/lib/tempest b/lib/tempest
index 3f33512..7d7cf11 100644
--- a/lib/tempest
+++ b/lib/tempest
@@ -401,10 +401,12 @@
     fi
 
     # Scenario
-    iniset $TEMPEST_CONFIG scenario img_dir "$FILES/images/cirros-${CIRROS_VERSION}-${CIRROS_ARCH}-uec"
+    SCENARIO_IMAGE_DIR=${SCENARIO_IMAGE_DIR:-$FILES/images/cirros-${CIRROS_VERSION}-${CIRROS_ARCH}-uec}
+    iniset $TEMPEST_CONFIG scenario img_dir $SCENARIO_IMAGE_DIR
     iniset $TEMPEST_CONFIG scenario ami_img_file "cirros-${CIRROS_VERSION}-${CIRROS_ARCH}-blank.img"
     iniset $TEMPEST_CONFIG scenario ari_img_file "cirros-${CIRROS_VERSION}-${CIRROS_ARCH}-initrd"
     iniset $TEMPEST_CONFIG scenario aki_img_file "cirros-${CIRROS_VERSION}-${CIRROS_ARCH}-vmlinuz"
+    iniset $TEMPEST_CONFIG scenario img_file "cirros-${CIRROS_VERSION}-${CIRROS_ARCH}-disk.img"
 
     # Large Ops Number
     iniset $TEMPEST_CONFIG scenario large_ops_number ${TEMPEST_LARGE_OPS_NUMBER:-0}