diff --git a/tempest/config.py b/tempest/config.py
index a4527ed..70ede55 100644
--- a/tempest/config.py
+++ b/tempest/config.py
@@ -397,7 +397,10 @@
     cfg.BoolOpt('nova_cert',
                 default=False,
                 help='Does the test environment have the nova cert running?',
-                deprecated_for_removal=True),
+                deprecated_for_removal=True,
+                deprecated_reason="On Nova side, the nova-cert service is "
+                                  "deprecated and the service will be removed "
+                                  "as early as Ocata."),
     cfg.BoolOpt('personality',
                 default=False,
                 help='Does the test environment support server personality'),