diff --git a/rpc/rpc_test.go b/rpc/rpc_test.go
index 2965c1b..59479c8 100644
--- a/rpc/rpc_test.go
+++ b/rpc/rpc_test.go
@@ -2,6 +2,7 @@ package rpc
 
 import (
 	"context"
+	"math/rand"
 	"testing"
 	"time"
 
@@ -20,12 +21,12 @@ func (tr *testReceiver) TargetExists(tid primitive.ObjectID) bool {
 
 func (tr *testReceiver) TestFunc(a string, b string, c int) {
 	target := primitive.NewObjectID()
-	target[0] = 0
+	target[0] = byte(rand.Intn(2) * 20)
 	if CallOrGo(tr, target, a, b) != ErrCanExecuteHere {
 		return
 	}
 
-	logger.Println("    ", a, b)
+	logger.Println("    ", a, b, target[0])
 }
 
 func TestRpc(t *testing.T) {