diff --git a/g/os/gmlock/gmlock_unit_lock_test.go b/g/os/gmlock/gmlock_unit_lock_test.go
index fcd730dd7..27ddbdb1d 100644
--- a/g/os/gmlock/gmlock_unit_lock_test.go
+++ b/g/os/gmlock/gmlock_unit_lock_test.go
@@ -16,7 +16,6 @@ import (
 )
 
 func Test_Locker_Lock(t *testing.T) {
-	//no expire
 	gtest.Case(t, func() {
 		key := "testLock"
 		array := garray.New()
@@ -43,6 +42,71 @@ func Test_Locker_Lock(t *testing.T) {
 		gtest.Assert(array.Len(), 3)
 		time.Sleep(50 * time.Millisecond)
 		gtest.Assert(array.Len(), 4)
+		gmlock.Remove(key)
+	})
+
+	gtest.Case(t, func() {
+		key := "testLock"
+		array := garray.New()
+		lock := gmlock.New()
+		go func() {
+			lock.Lock(key)
+			array.Append(1)
+			time.Sleep(50 * time.Millisecond)
+			array.Append(1)
+			lock.Unlock(key)
+		}()
+		go func() {
+			time.Sleep(10 * time.Millisecond)
+			lock.Lock(key)
+			array.Append(1)
+			time.Sleep(100 * time.Millisecond)
+			array.Append(1)
+			lock.Unlock(key)
+		}()
+		time.Sleep(10 * time.Millisecond)
+		gtest.Assert(array.Len(), 1)
+		time.Sleep(50 * time.Millisecond)
+		gtest.Assert(array.Len(), 3)
+		time.Sleep(50 * time.Millisecond)
+		gtest.Assert(array.Len(), 3)
+		time.Sleep(50 * time.Millisecond)
+		gtest.Assert(array.Len(), 4)
+		lock.Clear()
+	})
+
+}
+
+func Test_Locker_TryLock(t *testing.T) {
+	gtest.Case(t, func() {
+		key := "testTryLock"
+		array := garray.New()
+		go func() {
+			gmlock.Lock(key)
+			array.Append(1)
+			time.Sleep(200 * time.Millisecond)
+			gmlock.Unlock(key)
+		}()
+		go func() {
+			time.Sleep(10 * time.Millisecond)
+			if gmlock.TryLock(key) {
+				array.Append(1)
+				gmlock.Unlock(key)
+			}
+		}()
+		go func() {
+			time.Sleep(300 * time.Millisecond)
+			if gmlock.TryLock(key) {
+				array.Append(1)
+				gmlock.Unlock(key)
+			}
+		}()
+		time.Sleep(50 * time.Millisecond)
+		gtest.Assert(array.Len(), 1)
+		time.Sleep(50 * time.Millisecond)
+		gtest.Assert(array.Len(), 1)
+		time.Sleep(300 * time.Millisecond)
+		gtest.Assert(array.Len(), 2)
 	})
 
 }