diff --git a/core/net/src/test/java/org/onosproject/net/pi/impl/PiPipeconfManagerTest.java b/core/net/src/test/java/org/onosproject/net/pi/impl/PiPipeconfManagerTest.java
index 9850004..17100e3 100644
--- a/core/net/src/test/java/org/onosproject/net/pi/impl/PiPipeconfManagerTest.java
+++ b/core/net/src/test/java/org/onosproject/net/pi/impl/PiPipeconfManagerTest.java
@@ -279,6 +279,11 @@
         }
 
         @Override
+        public String getProperty(String name) {
+            return null;
+        }
+
+        @Override
         public Set<Class<? extends Behaviour>> behaviours() {
             return ImmutableSet.of(DeviceDescriptionDiscovery.class);
         }