Wilder was pleased with a lot of aspects of Saturday's game against Derby County when the big-spending Championship side edged a close encounter at Sixfields.
"I thought we were excellent, it was a real competitive game and we took a lot out of it," the Cobblers boss told the official club website.
Gary Rowett's Birmingham City are the next visitors with the Blues splitting their squad in two for games both at Northampton and League One side Shrewsbury Town.
Trialists Shane Lowry and Rostyn Griffiths played against Kidderminster Harriers on Saturday and Rowett and his staff will be keen to look at the pair again.