diff --git a/pkg/fedvolumebackup/backupschedule/backup_schedule_manager.go b/pkg/fedvolumebackup/backupschedule/backup_schedule_manager.go
index 903f5276ed..f0a89e3e4a 100644
--- a/pkg/fedvolumebackup/backupschedule/backup_schedule_manager.go
+++ b/pkg/fedvolumebackup/backupschedule/backup_schedule_manager.go
@@ -295,10 +295,7 @@ func sortSnapshotBackups(backupsList []*v1alpha1.VolumeBackup) []*v1alpha1.Volum
 // it's for test only now
 func sortAllSnapshotBackups(backupsList []*v1alpha1.VolumeBackup) []*v1alpha1.VolumeBackup {
 	var ascBackupList = make([]*v1alpha1.VolumeBackup, 0)
-
-	for _, backup := range backupsList {
-		ascBackupList = append(ascBackupList, backup)
-	}
+	ascBackupList = append(ascBackupList, backupsList...)
 
 	sort.Slice(ascBackupList, func(i, j int) bool {
 		return ascBackupList[i].CreationTimestamp.Unix() < ascBackupList[j].CreationTimestamp.Unix()
diff --git a/pkg/fedvolumebackup/backupschedule/backup_schedule_manager_test.go b/pkg/fedvolumebackup/backupschedule/backup_schedule_manager_test.go
index 3e26b38d86..43fd0e5102 100644
--- a/pkg/fedvolumebackup/backupschedule/backup_schedule_manager_test.go
+++ b/pkg/fedvolumebackup/backupschedule/backup_schedule_manager_test.go
@@ -16,7 +16,7 @@ package backupschedule
 import (
 	"context"
 	"fmt"
-	old_v1alpha1 "github.com/pingcap/tidb-operator/pkg/apis/pingcap/v1alpha1"
+	oldv1alpha1 "github.com/pingcap/tidb-operator/pkg/apis/pingcap/v1alpha1"
 	"strconv"
 	"testing"
 	"time"
@@ -43,7 +43,7 @@ func TestManager(t *testing.T) {
 	bs.Namespace = "ns"
 	bs.Name = "bsname"
 	bs.Spec.BackupTemplate.Template.BR = &v1alpha1.BRConfig{}
-	bs.Spec.BackupTemplate.Template.S3 = &old_v1alpha1.S3StorageProvider{}
+	bs.Spec.BackupTemplate.Template.S3 = &oldv1alpha1.S3StorageProvider{}
 
 	// test pause
 	bs.Spec.Pause = true
@@ -204,7 +204,7 @@ func TestBuildBackup(t *testing.T) {
 
 	// test BR != nil
 	bs.Spec.BackupTemplate.Template.BR = &v1alpha1.BRConfig{}
-	bs.Spec.BackupTemplate.Template.S3 = &old_v1alpha1.S3StorageProvider{}
+	bs.Spec.BackupTemplate.Template.S3 = &oldv1alpha1.S3StorageProvider{}
 
 	bk.Spec.Template.BR = bs.Spec.BackupTemplate.Template.BR.DeepCopy()
 	bk.Spec.Template.S3 = bs.Spec.BackupTemplate.Template.S3.DeepCopy()