diff --git a/tempest/test_discover/plugins.py b/tempest/test_discover/plugins.py
index 1206e3f..9c18052 100644
--- a/tempest/test_discover/plugins.py
+++ b/tempest/test_discover/plugins.py
@@ -76,7 +76,7 @@
                 conf.register_opt(my_config.service_option,
                                   group='service_available')
                 conf.register_group(my_config.my_service_group)
-                conf.register_opts(my_config.MyService +
+                conf.register_opts(my_config.MyServiceGroup,
                                    my_config.my_service_group)
 
                 conf.register_group(my_config.my_service_feature_group)