Dublin manager Dessie Farrell warned his side will move into "a different realm" when they square up to Armagh for their Allianz Football League Division 1 opener on Saturday night.
The Dubs lifted the O'Byrne Cup for the tenth time after battling past a dogged and organised Laois.
Dublin had 14 players for all of the second half following John Small's 31st-minute sending-off but they still had too much quality as they closed out a 1-13 to 0-11 win at Netwatch Cullen Park.
Attention now turns to a Croke Park face-off with Kieran McGeeney's Armagh, and Farrell expects a major test.
"You're moving into a different realm [against Armagh] and that's no disrespect to Laois who were very, very competitive today," he told RTÉ Sport.
"Armagh would have been out the gap. They're well organised with Kieran and very fit, very physical with a good game plan.
"Our objective in the O'Byrne Cup was to try out some new players and we've done that through the various rounds but also to give some core players some preparation for the start of the National League next week.
"We've managed to do that quite well over the last couple of weeks which we're happy with.
"There's a proper test of character when you go a man down. It was something we spoke about at half-time in terms of upping the intensity and the work rate.
"There were some really encouraging performances from some of the newer players, that started or were introduced. We're happy with today's exercise for sure."
Farrell did have words of praise for Billy Sheehan's Laois, who had a positive pre-season after bouncing back from a heavy defeat to Wexford in round one.
"Laois have been impressive in the O'Byrne Cup, particularly in the latter rounds," said Farrell.
"Under new management, they're well organised, they've a good set-up and a good shape about them. They know what they're doing. It was always going to be a proper test."
Reflecting on GAA Central Council's endorsement of the 'Green Proposal' for reform of the All-Ireland senior football championship, Farrell added: "More games is always better. We had a culture of a lot of training and not so many games previously in the GAA, in inter-county competition at least. Anything that addresses is always worthy."