diff --git a/client/client_test.go b/client/client_test.go
index 897b69d..ab89403 100644
--- a/client/client_test.go
+++ b/client/client_test.go
@@ -14,10 +14,7 @@ func TestClient(t *testing.T) {
 	require.NoError(t, err)
 	ctx := context.Background()
 
-	bKey := &proto.BaseKey{
-		Key: "apple",
-		Ttl: 10,
-	}
+	bKey := proto.NewBaseKey("apple")
 	resp, err := cli.Set(ctx, &proto.SetRequest{
 		Key: bKey,
 		Val: "yyyy",
diff --git a/pkg/proto/define.go b/pkg/proto/define.go
index 271091f..5b5f408 100644
--- a/pkg/proto/define.go
+++ b/pkg/proto/define.go
@@ -15,7 +15,7 @@ const (
 // NewBaseKey
 // key，ttl，expire
 func NewBaseKey(key string, t ...int64) *BaseKey {
-	var expire *timestamppb.Timestamp
+	var expire *timestamppb.Timestamp = nil
 	var ttl int64
 
 	if len(t) > 1 {