diff --git a/transport/internet/kcp/kcp_test.go b/transport/internet/kcp/kcp_test.go
index e039812ad..7a35ec218 100644
--- a/transport/internet/kcp/kcp_test.go
+++ b/transport/internet/kcp/kcp_test.go
@@ -52,7 +52,7 @@ func TestDialAndListen(t *testing.T) {
 		go func() {
 			clientSend := make([]byte, 1024*1024)
 			rand.Read(clientSend)
-			clientConn.Write(clientSend)
+			go clientConn.Write(clientSend)
 
 			clientReceived := make([]byte, 1024*1024)
 			nBytes, _ := io.ReadFull(clientConn, clientReceived)