Although the Cobblers are all but certain to be playing League Two football again next season, new manager Johnson is keen to stamp his authority onto the team and build up some momentum for the new campaign.
Although pleased with the way his side ended Tuesday night's game at Chesterfield, Johnson was none too happy with what he called a 'soft underbelly' as the league leaders came away with all three points.
Loan signings Nana and Jamie Reckord started the game and Johnson may seek to do a further deal in the near future.
He added: “The two new lads did well for us. We can get one more in.
“It’s just a question of working out which position we’re going to go for, because there are really two or three areas where we could use someone."