diff --git a/transports/transport-rest/transport-rest-vertx/src/test/java/org/apache/servicecomb/transport/rest/vertx/MockHttpServerResponse.java b/transports/transport-rest/transport-rest-vertx/src/test/java/org/apache/servicecomb/transport/rest/vertx/MockHttpServerResponse.java
index 568aab893a2..9d78aa6760c 100644
--- a/transports/transport-rest/transport-rest-vertx/src/test/java/org/apache/servicecomb/transport/rest/vertx/MockHttpServerResponse.java
+++ b/transports/transport-rest/transport-rest-vertx/src/test/java/org/apache/servicecomb/transport/rest/vertx/MockHttpServerResponse.java
@@ -195,6 +195,11 @@ public HttpServerResponse endHandler(Handler<Void> handler) {
     return null;
   }
 
+  @Override
+  public Future<Void> writeHead() {
+    return Future.succeededFuture();
+  }
+
   @Override
   public Future<Void> write(String chunk, String enc) {
     return Future.succeededFuture();