diff --git a/kfsend_test.go b/kfsend_test.go
index a4378fc..3116fa7 100644
--- a/kfsend_test.go
+++ b/kfsend_test.go
@@ -2,15 +2,34 @@ package main
 
 import (
 	"fmt"
+	"math/rand"
 	"testing"
 	"time"
 )
 
 var toUser = "oUN420bxqFqlx0ZQHciUOesZO3PE"
 
+func randinit() {
+	rand.Seed(time.Now().UnixNano())
+}
+
+var letterRunes = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
+
+func RandStringRunes(n int) string {
+	b := make([]rune, n)
+	for i := range b {
+		b[i] = letterRunes[rand.Intn(len(letterRunes))]
+	}
+	return string(b)
+}
+
 func TestSendTxt(t *testing.T) {
 	SetupConfig()
 	msg := fmt.Sprintf("测试消息， %s ", time.Now().String())
+
+	randinit()
+	msg = RandStringRunes(2048)
+
 	kfSendTxt(toUser, msg)
 }