Having seen off Premier League opposition in Round 3, the Reds are likely to have a tougher game against Simon Grayson's League One side than they did against a demoralised and youthful West Ham United.
Reduced price tickets and an evening kick-off should ensure a better atmosphere than if the game was played on a Saturday afternoon and a healthy travelling contingent is expected to follow North End to the game.
The visitors will be without experienced striker Kevin Davies after he was given a straight red card against Coventry City at the weekend but manager Grayson has plenty of striking options, including in-form former Forest man Joe Garner, at his disposal.
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"This will be an even bigger yardstick of where we are than our previous games against Championship clubs this season, because Forest are flying at the minute," Grayson told his club's official website but also feels that Billy Davies will have received plenty in the scouting reports on his old club to know that Forest will face a difficult task themselves.
***Update*** Ishmael Miller has rejoined Yeovil on loan until the end of the season after making a positive impact in his first spell with the Glovers.
"He gave us his word that as soon as Nottingham Forest sent him back out he wanted to come here, so he’s kept to that," said manager Gary Johnson.