The Cobblers will take on Corby Town at Steel Park in the 2013 final of the Maunsell Cup.
The game will be played on Wednesday July 24 with a 7.30pm kick-off.
The fixture is the third that Town have arranged so far against non-league opposition, with trips to United Counties League sides Sileby Rangers and Cogenhoe United preceding it.
As it stands, the club’s two home games will be against Peterborough United and Leicester City.
Admission prices for the Corby game, payable on arrival, are:
Concessions (over 60s) £4
Under 16s £2
The Cobblers’ pre-season friendly schedule:
Sat July 13: Sileby Rangers (away, 3pm)
Tues July 16: Cogenhoe United (away, 7.45pm)
Sat July 20: Peterborough United (home, 3pm)
Weds July 24: Corby Town (away, 7.30pm)
Tues July 30: Leicester City (home, 7.45pm)