Kevin Keegan admitted that his squad still needed to be reinforced following the 4-1 victory over Hartlepool.
Damien Duff netted a hat-trick in the pre-season match and summer signing Danny Guthrie also scored with the aid of a deflection.
But Keegan realises he has plenty of work still to do if the Magpies are to be ready for their opening Premier League game against Manchester United.
Asked if there would be any more signings, Keegan replied: "There have definitely got to be some more in the pipeline.
"We only had two players (on the bench) today who I would call senior players with us, so that gave us a total of 12 outfield players.
"We are like a lot of clubs at the moment, everyone is waiting for something to happen. We are still looking.
"They will definitely be in by the end of the transfer window because you just can't go into the Premier League with this small squad we have got.
"But everyone is working hard and we will see what happens."
