The Rams are in town on Saturday 18 July with a 2pm kick-off while Blues visit on Tuesday 21 July at 7:30pm.
Ticket details are out now on the official club website
The fixtures are a step up in pre-season preparation for the Cobblers, who play two public friendlies during their South Coast training camp, starting at Worthing FC on Tuesday July 7 at 7:30pm and continuing at Burgess Hill Town on Saturday July 11 at 3pm.
Known as ‘The Rebels’ and currently of the Ryman League Division One South, where they finished just outside the play-offs last season, Worthing play their home games at Woodside Road.
Burgess Hill Town will move up to the Ryman League Premier next season after winning Division One South by an impressive distance in 2014/15 when they amassed 109 points. Leylands Park is their home ground.
Other confirmed pre-season games are against Sileby Rangers (Sunday 5 July) and Brackley Town (Saturday 25 July).