diff --git a/test/src/test/java/com/alibaba/nacos/test/naming/NamingProxy_ITCase.java b/test/src/test/java/com/alibaba/nacos/test/naming/NamingProxy_ITCase.java
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+/*
+ * Copyright 1999-2018 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alibaba.nacos.test.naming;
+
+import com.alibaba.nacos.api.PropertyKeyConst;
+import com.alibaba.nacos.api.exception.NacosException;
+import com.alibaba.nacos.api.naming.NamingFactory;
+import com.alibaba.nacos.api.naming.NamingService;
+import com.alibaba.nacos.api.naming.utils.NamingUtils;
+import com.alibaba.nacos.naming.NamingApp;
+import com.alibaba.nacos.naming.cluster.transport.Serializer;
+import com.alibaba.nacos.naming.consistency.Datum;
+import com.alibaba.nacos.naming.consistency.KeyBuilder;
+import com.alibaba.nacos.naming.consistency.ephemeral.distro.DataStore;
+import com.alibaba.nacos.naming.core.Instance;
+import com.alibaba.nacos.naming.core.Instances;
+import com.alibaba.nacos.naming.misc.NamingProxy;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.web.server.LocalServerPort;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.Properties;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes = NamingApp.class, properties = {"server.servlet.context-path=/nacos"},
+    webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+public class NamingProxy_ITCase {
+    @LocalServerPort
+    private int port;
+    @Autowired
+    private Serializer serializer;
+    private final DataStore dataStore = new DataStore();
+    private NamingService namingService;
+    private final String namespaceId = "dev";
+    private final String serviceName = "biz";
+    private final String groupName = "DEFAULT_GROUP";
+
+    @Before
+    public void init() throws NacosException {
+        Properties properties = new Properties();
+        properties.put(PropertyKeyConst.NAMESPACE, namespaceId);
+        properties.put(PropertyKeyConst.SERVER_ADDR, "localhost:" + port);
+        namingService = NamingFactory.createNamingService(properties);
+    }
+
+    @Test
+    public void testSyncData() throws NacosException {
+        // write data to DataStore
+        String groupedName = NamingUtils.getGroupedName(serviceName, groupName);
+        Instances instances = new Instances();
+        Instance instance = new Instance();
+        instance.setIp("1.2.3.4");
+        instance.setPort(8888);
+        instance.setEphemeral(true);
+        instance.setServiceName(groupedName);
+        List<Instance> instanceList = new ArrayList<Instance>(1);
+        instanceList.add(instance);
+        instances.setInstanceList(instanceList);
+        String key = KeyBuilder.buildInstanceListKey(namespaceId, instance.getServiceName(), true);
+
+        Datum<Instances> datum = new Datum<>();
+        datum.value = instances;
+        datum.key = key;
+        datum.timestamp.incrementAndGet();
+        this.dataStore.put(key, datum);
+
+        // sync data to server
+        Map<String, Datum> dataMap = dataStore.getDataMap();
+        byte[] content = serializer.serialize(dataMap);
+        boolean result = NamingProxy.syncData(content, "localhost:" + port);
+        if (!result) {
+            Assert.fail("NamingProxy.syncData error");
+        }
+        // query instance by api
+        List<com.alibaba.nacos.api.naming.pojo.Instance> allInstances = namingService.getAllInstances(serviceName);
+        com.alibaba.nacos.api.naming.pojo.Instance dst = allInstances.get(0);
+        Assert.assertEquals(instance.getIp(), dst.getIp());
+        Assert.assertEquals(instance.getPort(), dst.getPort());
+        Assert.assertEquals(instance.getServiceName(), dst.getServiceName());
+    }
+}
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