St Johnstone punished Hamilton Academical's lacklustre defending to secure successive Premiership wins.
Blair Alston bundled in the opening goal after David McMillan's header had been saved and McMillan then nodded the visitors' second.
McMillan and Chris Kane fired wide as Accies continued to struggle after the break.
Rakish Bingham lashed home to give Hamilton hope but they could not avoid a third defeat in four league games.
Tommy Wright's side move on to seven points from four games before the international break.
Accies exposed by clinical Saints
Hamilton had recruited four players, including James Keatings, on transfer deadline day while Saints added two Friday captures - Ross Callachan and Danny Swanson - to Tristan Nydam's arrival earlier in the week.
But none of the new signings started in Lanarkshire and only Callachan and Nydam made the bench.
The lack of fresh faces did not seem to affect Accies early on with Bingham's low shot testing goalkeeper Zander Clark and Steven Boyd's effort deflecting wide just wide.
But the hosts passed up several opportunities to get the ball clear after Scott Tanser's free-kick had hit the wall and eventually McMillan's diving header was clawed away by Gary Woods only for Alston to score.
And Saints took advantage of Hamilton's passive approach again when McMillan applied a simple downward header to Richard Foster's delivery.
McMillan volleyed wide and Alston was denied by Woods before Accies scored against the run of play with Boyd holding up well and Bingham applying a ruthless finish.
Neither Boyd nor Tony Watt's replacement Kane could emulate that kind of finishing prowess in the closing stages.