diff --git a/dubbo-rpc-default/src/test/java/com/alibaba/dubbo/rpc/protocol/dubbo/telnet/ChangeTelnetHandlerTest.java b/dubbo-rpc-default/src/test/java/com/alibaba/dubbo/rpc/protocol/dubbo/telnet/ChangeTelnetHandlerTest.java
new file mode 100644
index 0000000000..4bd3ba71d6
--- /dev/null
+++ b/dubbo-rpc-default/src/test/java/com/alibaba/dubbo/rpc/protocol/dubbo/telnet/ChangeTelnetHandlerTest.java
@@ -0,0 +1,120 @@
+/*
+ * Copyright 1999-2101 Alibaba Group.
+ *  
+ * 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.dubbo.rpc.protocol.dubbo.telnet;
+
+import static org.junit.Assert.assertEquals;
+
+import org.easymock.EasyMock;
+import org.junit.After;
+import org.junit.AfterClass;
+import org.junit.Before;
+import org.junit.Test;
+
+import com.alibaba.dubbo.common.URL;
+import com.alibaba.dubbo.remoting.Channel;
+import com.alibaba.dubbo.remoting.RemotingException;
+import com.alibaba.dubbo.remoting.telnet.TelnetHandler;
+import com.alibaba.dubbo.rpc.Invoker;
+import com.alibaba.dubbo.rpc.protocol.dubbo.DubboProtocol;
+import com.alibaba.dubbo.rpc.protocol.dubbo.support.DemoService;
+
+/**
+ * ChangeTelnetHandlerTest.java
+ * 
+ * @author tony.chenl
+ */
+public class ChangeTelnetHandlerTest {
+
+    private static TelnetHandler change = new ChangeTelnetHandler();
+    private Channel              mockChannel;
+    private Invoker<DemoService> mockInvoker;
+
+    @SuppressWarnings("unchecked")
+    @Before
+    public void setUp() {
+        mockChannel = EasyMock.createMock(Channel.class);
+        mockInvoker = EasyMock.createMock(Invoker.class);
+        EasyMock.expect(mockChannel.getAttribute("telnet.service")).andReturn("com.alibaba.dubbo.rpc.protocol.dubbo.support.DemoService").anyTimes();
+        mockChannel.setAttribute("telnet.service", "DemoService");
+        EasyMock.expectLastCall().anyTimes();
+        mockChannel.setAttribute("telnet.service", "com.alibaba.dubbo.rpc.protocol.dubbo.support.DemoService");
+        EasyMock.expectLastCall().anyTimes();
+        mockChannel.setAttribute("telnet.service", "demo");
+        EasyMock.expectLastCall().anyTimes();
+        mockChannel.removeAttribute("telnet.service");
+        EasyMock.expectLastCall().anyTimes();
+        EasyMock.expect(mockInvoker.getInterface()).andReturn(DemoService.class).anyTimes();
+        EasyMock.expect(mockInvoker.getUrl()).andReturn(URL.valueOf("dubbo://127.0.0.1:20880/demo")).anyTimes();
+        EasyMock.replay(mockChannel, mockInvoker);
+    }
+
+    @AfterClass
+    public static void tearDown() {
+
+    }
+
+    @After
+    public void after() {
+        EasyMock.reset(mockChannel, mockInvoker);
+        DubboProtocol.getDubboProtocol().destroy();
+    }
+
+    @Test
+    public void testChangeSimpleName() throws RemotingException {
+        DubboProtocol.getDubboProtocol().export(mockInvoker);
+        String result = change.telnet(mockChannel, "DemoService");
+        assertEquals("Used the DemoService as default.\r\nYou can cancel default service by command: cd /", result);
+    }
+
+    @Test
+    public void testChangeName() throws RemotingException {
+        DubboProtocol.getDubboProtocol().export(mockInvoker);
+        String result = change.telnet(mockChannel, "com.alibaba.dubbo.rpc.protocol.dubbo.support.DemoService");
+        assertEquals("Used the com.alibaba.dubbo.rpc.protocol.dubbo.support.DemoService as default.\r\nYou can cancel default service by command: cd /",
+                     result);
+    }
+
+    @Test
+    public void testChangePath() throws RemotingException {
+        DubboProtocol.getDubboProtocol().export(mockInvoker);
+        String result = change.telnet(mockChannel, "demo");
+        assertEquals("Used the demo as default.\r\nYou can cancel default service by command: cd /", result);
+    }
+
+    @Test
+    public void testChangeMessageNull() throws RemotingException {
+        String result = change.telnet(mockChannel, null);
+        assertEquals("Please input service name, eg: \r\ncd XxxService\r\ncd com.xxx.XxxService", result);
+    }
+
+    @Test
+    public void testChangeServiceNotExport() throws RemotingException {
+        String result = change.telnet(mockChannel, "demo");
+        assertEquals("No such service demo", result);
+    }
+
+    @Test
+    public void testChangeCancel() throws RemotingException {
+        String result = change.telnet(mockChannel, "..");
+        assertEquals("Cancelled default service com.alibaba.dubbo.rpc.protocol.dubbo.support.DemoService.", result);
+    }
+
+    @Test
+    public void testChangeCancel2() throws RemotingException {
+        String result = change.telnet(mockChannel, "/");
+        assertEquals("Cancelled default service com.alibaba.dubbo.rpc.protocol.dubbo.support.DemoService.", result);
+    }
+}