diff --git a/core/api/src/test/java/org/onosproject/ui/UiExtensionServiceAdapter.java b/core/api/src/test/java/org/onosproject/ui/UiExtensionServiceAdapter.java
index 8a246dc..93bcf9f 100644
--- a/core/api/src/test/java/org/onosproject/ui/UiExtensionServiceAdapter.java
+++ b/core/api/src/test/java/org/onosproject/ui/UiExtensionServiceAdapter.java
@@ -45,4 +45,8 @@
     public LionBundle getNavLionBundle() {
         return null;
     }
+
+    @Override
+    public void refreshModel() {
+    }
 }