Coventry travel to Ashton Gate tomorrow night for the Championship game which kicks off at 7.45pm and will have David Bell available for selection. The winger from Norwich had to sit out Saturday's FA Cup game with Chelsea due to being cup-tied.
Johnson who lost out to Chris Coleman for the manager of the month title last week, told Bristol City's club website at a press conference: "We'll announce our team an hour before the game and not beforehand.
"I don't really want to talk about formations, and I'm sure our supporters will understand the reasons behind that. We don't want to give Coventry any clues."