Following on from City's 1-1 draw at Bristol Rovers at the weekend, McCall's men hit the road again this Tuesday to take on fellow play-off hopefuls Fleetwood at Highbury Stadium.
Only one point and one place currently separates Fleetwood, who played out a goalless draw at home to Rochdale on Saturday, and City in the Sky Bet League One table.
McCall confirmed: "We will make changes on Tuesday, we will freshen it up.
"No doubt, we will be backed by a terrific away following at Fleetwood as well.
"It will be a tough game, but they are all tough at this stage of the season. Everyone is still fighting hard for something.
"Games against sides at the bottom or the top can be equally as challenging at the moment.
"If we keep playing to the standard that we have been playing at recently though, in particular on Saturday (vs Bristol Rovers), we will be confident of getting a positive result."