diff --git a/apps/vtn/vtnrsc/src/test/java/org/onosproject/vtnrsc/util/VtnStorageServiceAdapter.java b/apps/vtn/vtnrsc/src/test/java/org/onosproject/vtnrsc/util/VtnStorageServiceAdapter.java
index 4724ceb..816cf77 100644
--- a/apps/vtn/vtnrsc/src/test/java/org/onosproject/vtnrsc/util/VtnStorageServiceAdapter.java
+++ b/apps/vtn/vtnrsc/src/test/java/org/onosproject/vtnrsc/util/VtnStorageServiceAdapter.java
@@ -21,6 +21,7 @@
 import org.onosproject.store.service.DistributedQueueBuilder;
 import org.onosproject.store.service.AtomicCounterBuilder;
 import org.onosproject.store.service.AtomicValueBuilder;
+import org.onosproject.store.service.LeaderElectorBuilder;
 import org.onosproject.store.service.TransactionContextBuilder;
 import org.onosproject.store.service.StorageService;
 
@@ -62,4 +63,9 @@
     public TransactionContextBuilder transactionContextBuilder() {
         return null;
     }
+
+    @Override
+    public LeaderElectorBuilder leaderElectorBuilder() {
+        return null;
+    }
 }