diff --git a/queue/simple/simple.go b/queue/simple/simple.go
index 61e5d32..e14d2f8 100644
--- a/queue/simple/simple.go
+++ b/queue/simple/simple.go
@@ -17,8 +17,8 @@ var errMaxCapacity = errors.New("max capacity reached")
 
 // Worker for simple queue using channel
 type Worker struct {
-	QueueNotification chan queue.QueuedMessage
-	runFunc           func(*Worker) error
+	queueNotification chan queue.QueuedMessage
+	runFunc           func(queue.QueuedMessage) error
 }
 
 // BeforeRun run script before start worker
@@ -33,29 +33,32 @@ func (s *Worker) AfterRun() error {
 
 // Run start the worker
 func (s *Worker) Run(_ chan struct{}) error {
-	return s.runFunc(s)
+	for notification := range s.queueNotification {
+		s.runFunc(notification)
+	}
+	return nil
 }
 
 // Shutdown worker
 func (s *Worker) Shutdown() error {
-	close(s.QueueNotification)
+	close(s.queueNotification)
 	return nil
 }
 
 // Capacity for channel
 func (s *Worker) Capacity() int {
-	return cap(s.QueueNotification)
+	return cap(s.queueNotification)
 }
 
 // Usage for count of channel usage
 func (s *Worker) Usage() int {
-	return len(s.QueueNotification)
+	return len(s.queueNotification)
 }
 
 // Queue send notification to queue
 func (s *Worker) Queue(job queue.QueuedMessage) error {
 	select {
-	case s.QueueNotification <- job:
+	case s.queueNotification <- job:
 		return nil
 	default:
 		return errMaxCapacity
@@ -65,12 +68,12 @@ func (s *Worker) Queue(job queue.QueuedMessage) error {
 // WithQueueNum setup the capcity of queue
 func WithQueueNum(num int) Option {
 	return func(w *Worker) {
-		w.QueueNotification = make(chan queue.QueuedMessage, num)
+		w.queueNotification = make(chan queue.QueuedMessage, num)
 	}
 }
 
 // WithRunFunc setup the run func of queue
-func WithRunFunc(fn func(w *Worker) error) Option {
+func WithRunFunc(fn func(queue.QueuedMessage) error) Option {
 	return func(w *Worker) {
 		w.runFunc = fn
 	}
@@ -79,11 +82,9 @@ func WithRunFunc(fn func(w *Worker) error) Option {
 // NewWorker for struc
 func NewWorker(opts ...Option) *Worker {
 	w := &Worker{
-		QueueNotification: make(chan queue.QueuedMessage, runtime.NumCPU()<<1),
-		runFunc: func(w *Worker) error {
-			for notification := range w.QueueNotification {
-				gorush.SendNotification(notification)
-			}
+		queueNotification: make(chan queue.QueuedMessage, runtime.NumCPU()<<1),
+		runFunc: func(msg queue.QueuedMessage) error {
+			gorush.SendNotification(msg)
 			return nil
 		},
 	}
diff --git a/queue/simple/simple_test.go b/queue/simple/simple_test.go
index 335908e..32244e8 100644
--- a/queue/simple/simple_test.go
+++ b/queue/simple/simple_test.go
@@ -1,14 +1,39 @@
 package simple
 
 import (
+	"log"
 	"runtime"
 	"testing"
+	"time"
 
 	"github.com/appleboy/gorush/gorush"
+	"github.com/appleboy/gorush/logx"
+	"github.com/appleboy/gorush/queue"
 
 	"github.com/stretchr/testify/assert"
 )
 
+type mockMessage struct {
+	msg string
+}
+
+func (m mockMessage) Bytes() []byte {
+	return []byte(m.msg)
+}
+
+func TestMain(m *testing.M) {
+	if err := logx.InitLog(
+		"debug",
+		"stdout",
+		"debug",
+		"stdout",
+	); err != nil {
+		log.Fatalf("Can't load log module, error: %v", err)
+	}
+
+	m.Run()
+}
+
 func TestQueueUsage(t *testing.T) {
 	w := NewWorker()
 	assert.Equal(t, runtime.NumCPU()<<1, w.Capacity())
@@ -33,3 +58,27 @@ func TestMaxCapacity(t *testing.T) {
 	err := w.Queue(&gorush.PushNotification{})
 	assert.Equal(t, errMaxCapacity, err)
 }
+
+func TestCustomFuncAndWait(t *testing.T) {
+	m := mockMessage{
+		msg: "foo",
+	}
+	w := NewWorker(
+		WithRunFunc(func(msg queue.QueuedMessage) error {
+			logx.LogAccess.Infof("get message: %s", msg.Bytes())
+			time.Sleep(500 * time.Millisecond)
+			return nil
+		}),
+	)
+	q := queue.NewQueue(w, 2)
+	q.Start()
+	time.Sleep(100 * time.Millisecond)
+	q.Queue(m)
+	q.Queue(m)
+	q.Queue(m)
+	q.Queue(m)
+	time.Sleep(600 * time.Millisecond)
+	q.Shutdown()
+	q.Wait()
+	// you will see the execute time > 1000ms
+}