diff --git a/heat_tempest_plugin/config.py b/heat_tempest_plugin/config.py
index ced87e3..5bf5161 100644
--- a/heat_tempest_plugin/config.py
+++ b/heat_tempest_plugin/config.py
@@ -156,6 +156,11 @@
     cfg.StrOpt('hidden_stack_tag',
                default='data-processing-cluster',
                help="Tag to be considered as hidden for stack tags tests"),
+    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."),
 ]