diff --git a/heat_tempest_plugin/config.py b/heat_tempest_plugin/config.py
index c30981c..d572340 100644
--- a/heat_tempest_plugin/config.py
+++ b/heat_tempest_plugin/config.py
@@ -162,6 +162,11 @@
     cfg.StrOpt('credential_secret_id',
                help="Barbican secret id which storing cloud credential in "
                "remote site."),
+    cfg.BoolOpt('vm_to_heat_api_insecure',
+                default=False,
+                help="Set this to True if VM images used for tests "
+                     "can not verify a (self-signed) SSL certificate "
+                     "of public Heat endpoint."),
 ]
 
 heat_features_group = cfg.OptGroup(