diff --git a/pkg/local_object_storage/engine/delete_test.go b/pkg/local_object_storage/engine/delete_test.go
index 0904c9820..e095e4bbd 100644
--- a/pkg/local_object_storage/engine/delete_test.go
+++ b/pkg/local_object_storage/engine/delete_test.go
@@ -49,11 +49,7 @@ func TestDeleteBigObject(t *testing.T) {
 	link.SetSplitID(splitID)
 	link.SetChildren(childIDs...)
 
-	s1 := testNewShard(t)
-	s2 := testNewShard(t)
-	s3 := testNewShard(t)
-
-	e := testNewEngine(t).setInitializedShards(t, s1, s2, s3).engine
+	e := testNewEngine(t).setShardsNum(t, 3).engine
 	e.log = test.NewLogger(t)
 	defer e.Close(context.Background())
 
diff --git a/pkg/local_object_storage/engine/engine_test.go b/pkg/local_object_storage/engine/engine_test.go
index 88c523b76..44bda2cbc 100644
--- a/pkg/local_object_storage/engine/engine_test.go
+++ b/pkg/local_object_storage/engine/engine_test.go
@@ -43,12 +43,7 @@ func BenchmarkExists(b *testing.B) {
 }
 
 func benchmarkExists(b *testing.B, shardNum int) {
-	shards := make([]*shard.Shard, shardNum)
-	for i := range shardNum {
-		shards[i] = testNewShard(b)
-	}
-
-	e := testNewEngine(b).setInitializedShards(b, shards...).engine
+	e := testNewEngine(b).setShardsNum(b, shardNum).engine
 	defer func() { require.NoError(b, e.Close(context.Background())) }()
 
 	addr := oidtest.Address()