The Glovers trail 1-0 after the first leg of their League One playoff semi-final on Friday.
Johnson is confident that the players will be fired up for the match and is sure that the crowd will be right behind them.
"I know the Yeovil Town fans will be right up for it," Sky Sports News quotes Johnson as saying. "It's a tight ground at Huish Park and I think it will be a cracking game.
"It will be very colourful and noisy. I've been telling the new lads, when this place has 8000 or 9000 in it then it feels a lot more because they are right on top of you.
"It is a game to look forward to and when it comes round everybody will be pleased with the effort everyone has put in."
Brentford and Swindon Town are level at 1-1 in the other playoff semi-final.