Northampton boss Chris Wilder described defeat to Leyton Orient as a 'wake-up call' for him and his players.
An experimental Northampton side were pegged back by a late goal as they drew 1-1 with Alloa.
Northampton have confirmed the signing of defender Evan Horwood on a two-year contract.
Northampton have completed the signing of Swansea defender Daniel Alfei on a season-long loan.
Northampton have secured the signing of John-Joe O'Toole after he left Bristol Rovers.
League One's Milton Keynes Dons face AFC Wimbledon of League Two in the pick of the first round Capital One Cup draw.
Port Vale winger Kaid Mohamed has completed a season-long loan deal with Northampton.
Northampton have confirmed that striker David Moyo has signed a new one-year contract.