Aberdeen equalled their best ever start to the season but were made to work it before eventually securing a 2-0 win.
Adam Rooney put the Dons in front but there was much controversy surrounding the goal as it looked as though he used his arm in the build up.
Kenny McLean rounded off an impressive personal performance, slamming the ball home after Tomas Cerny had parried David Goodwillie’s effort.
It means the Dons have won their first five games and match the start they made in the 1984 campaign where they would go on to win the title.
But it took them a while to get going in this game before they broke the deadlock.
And they had goalkeeper Danny Ward to thank for some fine interventions before the opener.
Aberdeen boss Derek McInnes told BBC Scotland after the game: “Danny’s made a couple of great saves. I thought Thistle to their credit created some good openings for themselves, but sometimes when a game’s tight it’s your goalkeeper and centre forward who can make the difference, and that was the case today.”
Meanwhile, Partick Thistle boss Alan Archibald was annoyed at referee Steven Finnie after he failed to spot a handball from Rooney in the build up to the first goal.
He said: “The big talking point was the goal, it changed it, it was a blatant handball. I said a few weeks ago against Celtic it’s a grey area and it’s hard for the referees.
“It’s got to be a handball, it doesn’t matter if it’s deliberate or not, but we’ve lost a goal on the back of it and it’s a sore one to take.
“(I am) delighted with the reaction afterwards, we still created chances against a top team.”