Caley Thistle confirmed their top flight status with an excellent 4-1 win against a below-par Partick Thistle at Firhill.
Carl Tremarco opened the scoring after 14 minutes before Miles Storey added a second within a minute of the restart.
Josh Meekings volleyed home the third from a Greg Tansey corner to put the result beyond doubt.
Kris Doolan pulled one back for Partick before Jordan Roberts completed the scoring with a smart finish.
Caley Thistle made two changes from the side that secured a crucial 3-1 win against Kilmarnock last Sunday with Andrea Mbuyi-Mutombo and Jordan Roberts replacing the suspended Iain Vigurs and the absent Danny Williams.
Partick Thistle should have broken the deadlock after only three minutes the ball broke kindly for the unmarked Steven Lawless but the midfielder fluffed his lines and shot wide.
But it was the visitors who opened the scoring with a superb move which culminated in Mutombo laying the ball off to left back Tremarco who ran 30 yards with the ball before showing excellent composure to slot the ball beyond Ryan Scully.
Miles Storey was denied twice by the Partick goalkeeper before Sean Welsh went close at the other end with a curling free kick that was well held by Owain Fon Williams.
The Caley Jags doubled their lead after only 35 seconds of the second period when Mutombo found Storey with a cute pass and the on-loan Swindon Town attacker volleyed the ball beyond Scully, who should have done better.
It almost got worse for the hosts a couple of minutes later when Mutombo almost took advantage of some poor play by Liam Lindsay but the Congolese attacker fired into the side-netting.
There was another reprieve for Partick after 55 minutes when Josh Meekings crossed for Roberts but his effort bounced back off the post.
Another chance went begging for the Caley Jags five minutes later when Roberts dragged his shot wide, prompting a loud chorus of boos from a frustrated Partick support.
The Partick defence were struggling to deal with the physical presence of Mutombo who almost grabbed the goal he deserved only to be denied by Scully and then see his follow up effort hacked off the line by Daniel Seaborne.
But Caley Thistle got the third goal their play merited with 14 minutes remaining when an out-swinging Greg Tansey corner fell perfectly for Meekings to thrash home.
Partick pulled a goal back after 83 minutes when a Seaborne free kick fell for Doolan who showed good composure to round Fon Williams and tap the ball into an unguarded net.
But the visitors were undeterred by that setback and went straight up the park and scored again with substitute Richie Foran crossing for Roberts to volley home.
