Newport Pagnell Town were comfortable 4-1 winners over Buckingham Athletic on Tuesday.
Dom Lawless opened the scoring, Fazel Koriya made it 2-0 before the visitors pulled one back.
Daryl Smith added a third before Koriya completed his brace to make it 4-1.
Darren Lynch’s men also learned their FA Cup fate this week as they were drawn against Biggleswade United in the FA Cup Extra Preliminary Round.
The Swans will host United at Willen Road on Saturday August 6.
The winner of the game will progress to the Preliminary Round against Aylesbury United on Saturday August 20.