diff --git a/dubbo-rpc/dubbo-rpc-dubbo/src/test/java/org/apache/dubbo/rpc/protocol/dubbo/ReferenceCountExchangeClientTest.java b/dubbo-rpc/dubbo-rpc-dubbo/src/test/java/org/apache/dubbo/rpc/protocol/dubbo/ReferenceCountExchangeClientTest.java
index ea7743ad524..fb338769b65 100644
--- a/dubbo-rpc/dubbo-rpc-dubbo/src/test/java/org/apache/dubbo/rpc/protocol/dubbo/ReferenceCountExchangeClientTest.java
+++ b/dubbo-rpc/dubbo-rpc-dubbo/src/test/java/org/apache/dubbo/rpc/protocol/dubbo/ReferenceCountExchangeClientTest.java
@@ -26,7 +26,9 @@
 import org.apache.dubbo.rpc.Exporter;
 import org.apache.dubbo.rpc.Invoker;
 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;
@@ -52,6 +54,11 @@ public class ReferenceCountExchangeClientTest {
     public static void setUpBeforeClass() throws Exception {
     }
 
+    @AfterClass
+    public static void tearDownAfterClass() {
+        ProtocolUtils.closeAll();
+    }
+
     public static Invoker<?> referInvoker(Class<?> type, URL url) {
         return (Invoker<?>) protocol.refer(type, url);
     }