diff --git a/dubbo-rpc-default/src/test/java/com/alibaba/dubbo/rpc/protocol/dubbo/support/ProtocolUtils.java b/dubbo-rpc-default/src/test/java/com/alibaba/dubbo/rpc/protocol/dubbo/support/ProtocolUtils.java
index e8c3eba4d6..a7ac9b65e7 100644
--- a/dubbo-rpc-default/src/test/java/com/alibaba/dubbo/rpc/protocol/dubbo/support/ProtocolUtils.java
+++ b/dubbo-rpc-default/src/test/java/com/alibaba/dubbo/rpc/protocol/dubbo/support/ProtocolUtils.java
@@ -15,36 +15,47 @@
  */
 package com.alibaba.dubbo.rpc.protocol.dubbo.support;
 
+import java.util.Collection;
+
 import com.alibaba.dubbo.common.ExtensionLoader;
 import com.alibaba.dubbo.common.URL;
+import com.alibaba.dubbo.remoting.exchange.ExchangeServer;
 import com.alibaba.dubbo.rpc.Exporter;
 import com.alibaba.dubbo.rpc.Protocol;
 import com.alibaba.dubbo.rpc.ProxyFactory;
+import com.alibaba.dubbo.rpc.protocol.dubbo.DubboProtocol;
 
 /**
  * TODO Comment of ProtocolUtils
+ * 
  * @author william.liangf
- *
  */
 public class ProtocolUtils {
 
-    private static Protocol protocol = ExtensionLoader.getExtensionLoader(Protocol.class).getAdaptiveExtension();
-    private static ProxyFactory proxy = ExtensionLoader.getExtensionLoader(ProxyFactory.class).getAdaptiveExtension();
-    
+    private static Protocol     protocol = ExtensionLoader.getExtensionLoader(Protocol.class).getAdaptiveExtension();
+    private static ProxyFactory proxy    = ExtensionLoader.getExtensionLoader(ProxyFactory.class).getAdaptiveExtension();
+
     public static <T> T refer(Class<T> type, String url) {
         return refer(type, URL.valueOf(url));
     }
-    
+
     public static <T> T refer(Class<T> type, URL url) {
         return proxy.getProxy(protocol.refer(type, url));
     }
-    
+
     public static <T> Exporter<T> export(T instance, Class<T> type, String url) {
         return export(instance, type, URL.valueOf(url));
     }
-    
+
     public static <T> Exporter<T> export(T instance, Class<T> type, URL url) {
         return protocol.export(proxy.getInvoker(instance, type, url));
     }
 
-}
\ No newline at end of file
+    public static void closeAll() {
+        DubboProtocol.getDubboProtocol().destroy();
+        Collection<ExchangeServer> servers = DubboProtocol.getDubboProtocol().getServers();
+        for (ExchangeServer server : servers) {
+            server.close();
+        }
+    }
+}
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
index cf1a0c29ff..f4185a72fb 100644
--- 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
@@ -26,11 +26,11 @@ 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.exchange.ExchangeServer;
 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;
+import com.alibaba.dubbo.rpc.protocol.dubbo.support.ProtocolUtils;
 
 /**
  * ChangeTelnetHandlerTest.java
@@ -69,11 +69,8 @@ public class ChangeTelnetHandlerTest {
 
     @After
     public void after() {
-        for (ExchangeServer server : DubboProtocol.getDubboProtocol().getServers()) {
-            server.close();
-        }
+        ProtocolUtils.closeAll();
         EasyMock.reset(mockChannel, mockInvoker);
-        DubboProtocol.getDubboProtocol().destroy();
     }
 
     @Test
diff --git a/dubbo-rpc-default/src/test/java/com/alibaba/dubbo/rpc/protocol/dubbo/telnet/InvokerTelnetHandlerTest.java b/dubbo-rpc-default/src/test/java/com/alibaba/dubbo/rpc/protocol/dubbo/telnet/InvokerTelnetHandlerTest.java
index 68485d861a..e8d41137c0 100644
--- a/dubbo-rpc-default/src/test/java/com/alibaba/dubbo/rpc/protocol/dubbo/telnet/InvokerTelnetHandlerTest.java
+++ b/dubbo-rpc-default/src/test/java/com/alibaba/dubbo/rpc/protocol/dubbo/telnet/InvokerTelnetHandlerTest.java
@@ -18,19 +18,24 @@ package com.alibaba.dubbo.rpc.protocol.dubbo.telnet;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
+import java.util.Collection;
+
 import org.easymock.EasyMock;
+import org.junit.After;
 import org.junit.Test;
 
 import com.alibaba.dubbo.common.URL;
 import com.alibaba.dubbo.common.utils.NetUtils;
 import com.alibaba.dubbo.remoting.Channel;
 import com.alibaba.dubbo.remoting.RemotingException;
+import com.alibaba.dubbo.remoting.exchange.ExchangeServer;
 import com.alibaba.dubbo.remoting.telnet.TelnetHandler;
 import com.alibaba.dubbo.rpc.Invocation;
 import com.alibaba.dubbo.rpc.Invoker;
 import com.alibaba.dubbo.rpc.RpcResult;
 import com.alibaba.dubbo.rpc.protocol.dubbo.DubboProtocol;
 import com.alibaba.dubbo.rpc.protocol.dubbo.support.DemoService;
+import com.alibaba.dubbo.rpc.protocol.dubbo.support.ProtocolUtils;
 
 /**
  * CountTelnetHandlerTest.java
@@ -43,6 +48,11 @@ public class InvokerTelnetHandlerTest {
     private Channel              mockChannel;
     private Invoker<DemoService> mockInvoker;
 
+    @After
+    public void after() {
+       ProtocolUtils.closeAll();
+    }
+
     @SuppressWarnings("unchecked")
     @Test
     public void testInvokeDefaultSService() throws RemotingException {
diff --git a/dubbo-rpc-default/src/test/java/com/alibaba/dubbo/rpc/protocol/dubbo/telnet/ListTelnetHandlerTest.java b/dubbo-rpc-default/src/test/java/com/alibaba/dubbo/rpc/protocol/dubbo/telnet/ListTelnetHandlerTest.java
index 79deaceaf9..fa56a05873 100644
--- a/dubbo-rpc-default/src/test/java/com/alibaba/dubbo/rpc/protocol/dubbo/telnet/ListTelnetHandlerTest.java
+++ b/dubbo-rpc-default/src/test/java/com/alibaba/dubbo/rpc/protocol/dubbo/telnet/ListTelnetHandlerTest.java
@@ -16,11 +16,11 @@
 package com.alibaba.dubbo.rpc.protocol.dubbo.telnet;
 
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
 
 import java.lang.reflect.Method;
 
 import org.easymock.EasyMock;
+import org.junit.After;
 import org.junit.BeforeClass;
 import org.junit.Test;
 
@@ -35,6 +35,7 @@ import com.alibaba.dubbo.rpc.Invoker;
 import com.alibaba.dubbo.rpc.RpcResult;
 import com.alibaba.dubbo.rpc.protocol.dubbo.DubboProtocol;
 import com.alibaba.dubbo.rpc.protocol.dubbo.support.DemoService;
+import com.alibaba.dubbo.rpc.protocol.dubbo.support.ProtocolUtils;
 
 /**
  * CountTelnetHandlerTest.java
@@ -67,6 +68,11 @@ public class ListTelnetHandlerTest {
         detailMethods = buf.toString();
         methodsName = buf2.toString();
     }
+    
+    @After
+    public void after() {
+        ProtocolUtils.closeAll();
+    }
 
     @SuppressWarnings("unchecked")
     @Test
@@ -100,6 +106,7 @@ public class ListTelnetHandlerTest {
         EasyMock.reset(mockChannel, mockInvoker);
     }
 
+    @SuppressWarnings("unchecked")
     @Test
     public void testList() throws RemotingException {
         mockInvoker = EasyMock.createMock(Invoker.class);
@@ -115,6 +122,7 @@ public class ListTelnetHandlerTest {
         EasyMock.reset(mockChannel);
     }
 
+    @SuppressWarnings("unchecked")
     @Test
     public void testListDetail() throws RemotingException {
         mockInvoker = EasyMock.createMock(Invoker.class);
@@ -131,6 +139,7 @@ public class ListTelnetHandlerTest {
         EasyMock.reset(mockChannel);
     }
 
+    @SuppressWarnings("unchecked")
     @Test
     public void testListDefault() throws RemotingException {
         mockInvoker = EasyMock.createMock(Invoker.class);