diff --git a/dubbo-rpc/dubbo-rpc-dubbo/src/test/java/org/apache/dubbo/rpc/protocol/dubbo/DubboProtocolTest.java b/dubbo-rpc/dubbo-rpc-dubbo/src/test/java/org/apache/dubbo/rpc/protocol/dubbo/DubboProtocolTest.java
index 7366ed1dd25..b67112c40df 100644
--- a/dubbo-rpc/dubbo-rpc-dubbo/src/test/java/org/apache/dubbo/rpc/protocol/dubbo/DubboProtocolTest.java
+++ b/dubbo-rpc/dubbo-rpc-dubbo/src/test/java/org/apache/dubbo/rpc/protocol/dubbo/DubboProtocolTest.java
@@ -26,11 +26,13 @@
 import org.apache.dubbo.rpc.protocol.dubbo.support.DemoService;
 import org.apache.dubbo.rpc.protocol.dubbo.support.DemoServiceImpl;
 import org.apache.dubbo.rpc.protocol.dubbo.support.NonSerialized;
+import org.apache.dubbo.rpc.protocol.dubbo.support.ProtocolUtils;
 import org.apache.dubbo.rpc.protocol.dubbo.support.RemoteService;
 import org.apache.dubbo.rpc.protocol.dubbo.support.RemoteServiceImpl;
 import org.apache.dubbo.rpc.protocol.dubbo.support.Type;
 import org.apache.dubbo.rpc.service.EchoService;
 
+import org.junit.AfterClass;
 import org.junit.Assert;
 import org.junit.Test;
 
@@ -48,6 +50,11 @@ public class DubboProtocolTest {
     private Protocol protocol = ExtensionLoader.getExtensionLoader(Protocol.class).getAdaptiveExtension();
     private ProxyFactory proxy = ExtensionLoader.getExtensionLoader(ProxyFactory.class).getAdaptiveExtension();
 
+    @AfterClass
+    public static void after() {
+        ProtocolUtils.closeAll();
+    }
+
     @Test
     public void testDemoProtocol() throws Exception {
         DemoService service = new DemoServiceImpl();
@@ -181,4 +188,4 @@ public void testReturnNonSerialized() throws Exception {
             Assert.assertTrue(e.getMessage().contains("org.apache.dubbo.rpc.protocol.dubbo.support.NonSerialized must implement java.io.Serializable"));
         }
     }
-}
\ No newline at end of file
+}