diff --git a/apps/vtn/sfcmgr/src/test/java/org/onosproject/sfc/util/VtnRscAdapter.java b/apps/vtn/sfcmgr/src/test/java/org/onosproject/sfc/util/VtnRscAdapter.java
index e5e2f1c..011d6a1 100644
--- a/apps/vtn/sfcmgr/src/test/java/org/onosproject/sfc/util/VtnRscAdapter.java
+++ b/apps/vtn/sfcmgr/src/test/java/org/onosproject/sfc/util/VtnRscAdapter.java
@@ -24,6 +24,7 @@
 import org.onosproject.net.HostId;
 import org.onosproject.vtnrsc.SegmentationId;
 import org.onosproject.vtnrsc.TenantId;
+import org.onosproject.vtnrsc.TenantRouter;
 import org.onosproject.vtnrsc.VirtualPortId;
 import org.onosproject.vtnrsc.event.VtnRscListener;
 import org.onosproject.vtnrsc.service.VtnRscService;
@@ -79,4 +80,9 @@
     public void removeDeviceIdOfOvsMap(Host host, TenantId tenantId,
                                        DeviceId deviceId) {
     }
+
+    @Override
+    public SegmentationId getL3vni(TenantRouter tenantRouter) {
+        return null;
+    }
 }