Simon Grayson said: "It doesn't matter what results we get, it's about the players spending time on the pitch and getting match fitness".
The Whites also have friendly fixtures with Bury, Hartlepool, Hemsworth, Wolves, Wakefield, Harrogate Town and Goole AFC throughout July and August, before the first match of the season against Derby County.
"By the time you reach the Wolves game, you'd like to think you're not far off where you want to be in terms of fitness levels ready for that Derby game," Grayson added.