diff --git a/providers/pcep/tunnel/src/test/java/org/onosproject/provider/pcep/tunnel/impl/PcepClientAdapter.java b/providers/pcep/tunnel/src/test/java/org/onosproject/provider/pcep/tunnel/impl/PcepClientAdapter.java
index 4f6178a..aafdfaa 100644
--- a/providers/pcep/tunnel/src/test/java/org/onosproject/provider/pcep/tunnel/impl/PcepClientAdapter.java
+++ b/providers/pcep/tunnel/src/test/java/org/onosproject/provider/pcep/tunnel/impl/PcepClientAdapter.java
@@ -18,6 +18,7 @@
 import static org.junit.Assert.assertNotNull;
 
 import java.util.HashMap;
+import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.RejectedExecutionException;
@@ -31,6 +32,7 @@
 import org.onosproject.pcepio.protocol.PcepFactories;
 import org.onosproject.pcepio.protocol.PcepFactory;
 import org.onosproject.pcepio.protocol.PcepMessage;
+import org.onosproject.pcepio.protocol.PcepStateReport;
 import org.onosproject.pcepio.protocol.PcepVersion;
 
 /**
@@ -49,6 +51,7 @@
     private PcepSyncStatus lspDbSyncStatus;
     private PcepSyncStatus labelDbSyncStatus;
     private Map<LspKey, Boolean> lspDelegationInfo = new HashMap<>();
+    private Map<PccId, List<PcepStateReport>> sycRptCache = new HashMap<>();
 
     /**
      * Initialize instance with specified parameters.
@@ -161,4 +164,27 @@
     public Boolean delegationInfo(LspKey lspKey) {
         return lspDelegationInfo.get(lspKey);
     }
+
+    @Override
+    public void initializeSyncMsgList(PccId pccId) {
+        List<PcepStateReport> rptMsgList = new LinkedList<>();
+        sycRptCache.put(pccId, rptMsgList);
+    }
+
+    @Override
+    public List<PcepStateReport> getSyncMsgList(PccId pccId) {
+        return sycRptCache.get(pccId);
+    }
+
+    @Override
+    public void removeSyncMsgList(PccId pccId) {
+        sycRptCache.remove(pccId);
+    }
+
+    @Override
+    public void addSyncMsgToList(PccId pccId, PcepStateReport rptMsg) {
+        List<PcepStateReport> rptMsgList = sycRptCache.get(pccId);
+        rptMsgList.add(rptMsg);
+        sycRptCache.put(pccId, rptMsgList);
+    }
 }