diff --git a/dubbo-rpc/dubbo-rpc-dubbo/src/test/java/org/apache/dubbo/rpc/protocol/dubbo/DubboInvokerAvilableTest.java b/dubbo-rpc/dubbo-rpc-dubbo/src/test/java/org/apache/dubbo/rpc/protocol/dubbo/DubboInvokerAvilableTest.java
index ced3d067751..14ab1242f6b 100644
--- a/dubbo-rpc/dubbo-rpc-dubbo/src/test/java/org/apache/dubbo/rpc/protocol/dubbo/DubboInvokerAvilableTest.java
+++ b/dubbo-rpc/dubbo-rpc-dubbo/src/test/java/org/apache/dubbo/rpc/protocol/dubbo/DubboInvokerAvilableTest.java
@@ -26,6 +26,7 @@
 import org.apache.dubbo.rpc.Exporter;
 import org.apache.dubbo.rpc.ProxyFactory;
 import org.apache.dubbo.rpc.protocol.dubbo.support.ProtocolUtils;
+import org.junit.AfterClass;
 import org.junit.Assert;
 import org.junit.Before;
 import org.junit.BeforeClass;
@@ -51,6 +52,11 @@ public static void setUpBeforeClass() throws Exception {
     public void setUp() throws Exception {
     }
 
+    @AfterClass
+    public static void tearDownAfterClass() {
+        ProtocolUtils.closeAll();
+    }
+
     @Test
     public void test_Normal_available() {
         URL url = URL.valueOf("dubbo://127.0.0.1:20883/org.apache.dubbo.rpc.protocol.dubbo.IDemoService");
diff --git a/dubbo-rpc/dubbo-rpc-dubbo/src/test/java/org/apache/dubbo/rpc/protocol/dubbo/DubboLazyConnectTest.java b/dubbo-rpc/dubbo-rpc-dubbo/src/test/java/org/apache/dubbo/rpc/protocol/dubbo/DubboLazyConnectTest.java
index 4efad6f9af2..31a4421e76f 100644
--- a/dubbo-rpc/dubbo-rpc-dubbo/src/test/java/org/apache/dubbo/rpc/protocol/dubbo/DubboLazyConnectTest.java
+++ b/dubbo-rpc/dubbo-rpc-dubbo/src/test/java/org/apache/dubbo/rpc/protocol/dubbo/DubboLazyConnectTest.java
@@ -22,6 +22,7 @@
 import org.apache.dubbo.common.utils.NetUtils;
 import org.apache.dubbo.rpc.RpcException;
 import org.apache.dubbo.rpc.protocol.dubbo.support.ProtocolUtils;
+import org.junit.AfterClass;
 import org.junit.Assert;
 import org.junit.Before;
 import org.junit.BeforeClass;
@@ -40,6 +41,11 @@ public static void setUpBeforeClass() throws Exception {
     public void setUp() throws Exception {
     }
 
+    @AfterClass
+    public static void tearDownAfterClass() {
+        ProtocolUtils.closeAll();
+    }
+
     @Test(expected = RpcException.class)
     public void testSticky1() {
         URL url = URL.valueOf("dubbo://127.0.0.1:9090/org.apache.dubbo.rpc.protocol.dubbo.IDemoService");
diff --git a/dubbo-rpc/dubbo-rpc-dubbo/src/test/java/org/apache/dubbo/rpc/protocol/dubbo/ExplicitCallbackTest.java b/dubbo-rpc/dubbo-rpc-dubbo/src/test/java/org/apache/dubbo/rpc/protocol/dubbo/ExplicitCallbackTest.java
index 3c8aecdd39f..e7a2b2a8837 100644
--- a/dubbo-rpc/dubbo-rpc-dubbo/src/test/java/org/apache/dubbo/rpc/protocol/dubbo/ExplicitCallbackTest.java
+++ b/dubbo-rpc/dubbo-rpc-dubbo/src/test/java/org/apache/dubbo/rpc/protocol/dubbo/ExplicitCallbackTest.java
@@ -49,6 +49,7 @@ public class ExplicitCallbackTest {
     @After
     public void tearDown() {
         destroyService();
+        ProtocolUtils.closeAll();
     }
 
     public void exportService() {
diff --git a/dubbo-rpc/dubbo-rpc-dubbo/src/test/java/org/apache/dubbo/rpc/protocol/dubbo/MultiThreadTest.java b/dubbo-rpc/dubbo-rpc-dubbo/src/test/java/org/apache/dubbo/rpc/protocol/dubbo/MultiThreadTest.java
index ce43473025b..04c3645824a 100644
--- a/dubbo-rpc/dubbo-rpc-dubbo/src/test/java/org/apache/dubbo/rpc/protocol/dubbo/MultiThreadTest.java
+++ b/dubbo-rpc/dubbo-rpc-dubbo/src/test/java/org/apache/dubbo/rpc/protocol/dubbo/MultiThreadTest.java
@@ -23,6 +23,8 @@
 import org.apache.dubbo.rpc.ProxyFactory;
 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.ProtocolUtils;
+import org.junit.After;
 import org.junit.Assert;
 import org.junit.Test;
 
@@ -36,6 +38,11 @@ public class MultiThreadTest {
     private Protocol protocol = ExtensionLoader.getExtensionLoader(Protocol.class).getAdaptiveExtension();
     private ProxyFactory proxy = ExtensionLoader.getExtensionLoader(ProxyFactory.class).getAdaptiveExtension();
 
+    @After
+    public void after() {
+        ProtocolUtils.closeAll();
+    }
+
     @Test
     public void testDubboMultiThreadInvoke() throws Exception {
         Exporter<?> rpcExporter = protocol.export(proxy.getInvoker(new DemoServiceImpl(), DemoService.class, URL.valueOf("dubbo://127.0.0.1:20259/TestService")));
diff --git a/dubbo-rpc/dubbo-rpc-dubbo/src/test/java/org/apache/dubbo/rpc/protocol/dubbo/RpcFilterTest.java b/dubbo-rpc/dubbo-rpc-dubbo/src/test/java/org/apache/dubbo/rpc/protocol/dubbo/RpcFilterTest.java
index f9cca922c11..43297a9d6ba 100644
--- a/dubbo-rpc/dubbo-rpc-dubbo/src/test/java/org/apache/dubbo/rpc/protocol/dubbo/RpcFilterTest.java
+++ b/dubbo-rpc/dubbo-rpc-dubbo/src/test/java/org/apache/dubbo/rpc/protocol/dubbo/RpcFilterTest.java
@@ -22,8 +22,10 @@
 import org.apache.dubbo.rpc.ProxyFactory;
 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.ProtocolUtils;
 import org.apache.dubbo.rpc.service.EchoService;
 
+import org.junit.After;
 import org.junit.Assert;
 import org.junit.Test;
 
@@ -31,6 +33,11 @@ public class RpcFilterTest {
     private Protocol protocol = ExtensionLoader.getExtensionLoader(Protocol.class).getAdaptiveExtension();
     private ProxyFactory proxy = ExtensionLoader.getExtensionLoader(ProxyFactory.class).getAdaptiveExtension();
 
+    @After
+    public void after() {
+        ProtocolUtils.closeAll();
+    }
+
     @Test
     public void testRpcFilter() throws Exception {
         DemoService service = new DemoServiceImpl();