diff --git a/pkg/lru/ttl_test.go b/pkg/lru/ttl_test.go
new file mode 100644
index 0000000..eecfcd6
--- /dev/null
+++ b/pkg/lru/ttl_test.go
@@ -0,0 +1,35 @@
+package lru
+
+import (
+	"fmt"
+	"gitee.com/timedb/wheatCache/pkg/proto"
+	"gitee.com/timedb/wheatCache/pkg/structure/stringx"
+	"github.com/stretchr/testify/require"
+	"testing"
+	"time"
+)
+
+func TestTTlCup(t *testing.T) {
+	k := make([]string, 100, 3000)
+	fmt.Println(cap(k))
+	p := k[:50]
+	fmt.Println(cap(p))
+}
+
+func Test_LruTTl(t *testing.T) {
+	lru := NewLRUCache()
+	s := stringx.NewStringSingle()
+	lru.Add(&proto.BaseKey{
+		Key: "k8s",
+		Ttl: 1,
+	}, s)
+	lru.Add(&proto.BaseKey{
+		Key: "990",
+		Ttl: 10,
+	}, s)
+	require.Equal(t, lru.nowSize, int64(16))
+
+	time.Sleep(4 * time.Second)
+	require.Equal(t, lru.nowSize, int64(8))
+
+}
diff --git a/pkg/lru/woker_test.go b/pkg/lru/woker_test.go
index 9e8a21b..52ad96d 100644
--- a/pkg/lru/woker_test.go
+++ b/pkg/lru/woker_test.go
@@ -53,6 +53,6 @@ func TestSingleCache_DelToClearSize(t *testing.T) {
 		workEvent.StartWaitEvent(2 * time.Second)
 	}
 
-	time.Sleep(5 * time.Second)
+	time.Sleep(5<<10 * time.Second)
 	logx.Info("end size is %d", lru.nowSize)
 }