Ross Murdoch, Michael Jamieson and Craig Benson have all qualified for the 200m breaststroke final at the British trials in Glasgow.
The Scottish trio will go up against Adam Peaty, world record holder over 50m and 100m, in pursuit of Olympic places.
Andrew Willis was the fastest qualifier in two minutes, 10.47 seconds.
Murdoch, the 2014 Commonwealth gold medallist, won his heat in 2:11.06, the second quickest time.
Benson and Jamieson, who won Olympic silver in 2012, recorded the fourth and fifth best times in the heats at Tollcross, with Peaty ahead of them.
Earlier this week, Murdoch finished second behind Peaty in the 100m breaststroke and is almost certain to join the world champion in that event at Rio this summer.