diff --git a/dubbo-rpc-default/src/test/java/com/alibaba/dubbo/rpc/protocol/dubbo/ImplicitCallBackTest.java b/dubbo-rpc-default/src/test/java/com/alibaba/dubbo/rpc/protocol/dubbo/ImplicitCallBackTest.java
index d36718edb9..12d8bdcf8a 100644
--- a/dubbo-rpc-default/src/test/java/com/alibaba/dubbo/rpc/protocol/dubbo/ImplicitCallBackTest.java
+++ b/dubbo-rpc-default/src/test/java/com/alibaba/dubbo/rpc/protocol/dubbo/ImplicitCallBackTest.java
@@ -16,27 +16,28 @@
 package com.alibaba.dubbo.rpc.protocol.dubbo;
 
 
-import java.io.Serializable;
-import java.lang.reflect.Method;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.concurrent.Future;
-import java.util.concurrent.TimeUnit;
-
-import junit.framework.Assert;
-
-import org.junit.Before;
-import org.junit.Test;
-
-import com.alibaba.dubbo.common.URL;
-import com.alibaba.dubbo.common.utils.NetUtils;
-import com.alibaba.dubbo.rpc.Exporter;
-import com.alibaba.dubbo.rpc.Invoker;
-import com.alibaba.dubbo.rpc.RpcConstants;
-import com.alibaba.dubbo.rpc.RpcContext;
-import com.alibaba.dubbo.rpc.StaticContext;
+import java.io.Serializable;
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.Future;
+import java.util.concurrent.TimeUnit;
+
+import junit.framework.Assert;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+import com.alibaba.dubbo.common.URL;
+import com.alibaba.dubbo.common.utils.NetUtils;
+import com.alibaba.dubbo.rpc.Exporter;
+import com.alibaba.dubbo.rpc.Invoker;
+import com.alibaba.dubbo.rpc.RpcConstants;
+import com.alibaba.dubbo.rpc.RpcContext;
+import com.alibaba.dubbo.rpc.StaticContext;
 import com.alibaba.dubbo.rpc.protocol.dubbo.support.ProtocolUtils;
 
 public class ImplicitCallBackTest{
@@ -55,6 +56,11 @@ public class ImplicitCallBackTest{
         onReturnMethod = Nofify.class.getMethod("onreturn", new Class<?>[]{Person.class, Integer.class});
         onThrowMethod = Nofify.class.getMethod("onthrow", new Class<?>[]{Throwable.class, Integer.class});
         onInvokeMethod = Nofify.class.getMethod("oninvoke", new Class<?>[]{Integer.class});
+    }
+    
+    @After
+    public void tearDown(){
+        ProtocolUtils.closeAll();
     }
     
     public void initOrResetService(){