In next example my tg bot returning raw text instead of formatted in code markdown

t_msg := tgbotapi.NewMessage(chat_id, ("```n" + "test" + "n```"))
        t_msg.ReplyMarkup = buttons_pos_search
        println(command, response, date)

        if _, err := bot.Send(t_msg); err != nil {
            log.Panic(err)
        }

Return from bot in tg

Mb im doing it wrong, but i need to get propper code Markdown in tg message from bot, but im getting just raw text instead