diff --git a/core/api/src/test/java/org/onosproject/net/config/NetworkConfigServiceAdapter.java b/core/api/src/test/java/org/onosproject/net/config/NetworkConfigServiceAdapter.java
index 1dc9211..1bad3a9 100644
--- a/core/api/src/test/java/org/onosproject/net/config/NetworkConfigServiceAdapter.java
+++ b/core/api/src/test/java/org/onosproject/net/config/NetworkConfigServiceAdapter.java
@@ -95,4 +95,12 @@
     @Override
     public void removeListener(NetworkConfigListener listener) {
     }
+
+    @Override
+    public <S> void removeConfig(S subject) {
+    }
+
+    @Override
+    public <S> void removeConfig() {
+    }
 }