diff --git a/lib/tempest b/lib/tempest
index d31119b..aea913d 100644
--- a/lib/tempest
+++ b/lib/tempest
@@ -278,7 +278,7 @@
 
     # Identity
     iniset $TEMPEST_CONFIG identity uri "$KEYSTONE_SERVICE_PROTOCOL://$KEYSTONE_SERVICE_HOST:5000/v2.0/"
-    iniset $TEMPEST_CONFIG identity uri_v3 "$KEYSTONE_SERVICE_PROTOCOL://$KEYSTONE_SERVICE_HOST:5000/v3/"
+    iniset $TEMPEST_CONFIG identity uri_v3 "$KEYSTONE_SERVICE_URI_V3"
     iniset $TEMPEST_CONFIG identity username $TEMPEST_USERNAME
     iniset $TEMPEST_CONFIG identity password "$password"
     iniset $TEMPEST_CONFIG identity tenant_name $TEMPEST_TENANT_NAME