Bryan Habana scored a try as Toulon beat the Scarlets 26-3 in their European Champions Cup match in Llanelli.
French centre Mathieu Bastareaud scored Toulon's other try, while Welsh fullback Leigh Halfpenny contributed 13 points with the boot.
Meanwhile, Racing Métro will host their first-ever European quarter-final after a 32-8 bonus-point win against the Northampton Saints at Franklin's Gardens. Northampton are also in the play-offs, but will face a tricky game on the road.
In other results on Saturday, former Cheetahs loose forward Ashley Johnson was sin-binned after just 17 seconds as Wasps could only manage a 20-20 draw, with Leinster sealing a quarter-final spot, the Neath-Swansea Ospreys ended their disappointing campaign with a 23-20 loss against Benetton Treviso at Stadio Comunale di Monigo, Harlequins failed to qualify for the quarter-finals despite picking up a bonus point in their 47-19 win at Castres, and Ulster cruised past Leicester 26-7.
Wasps 20 Leinster 20
Castres 19 Harlequins 17
Benetton Treviso 23 Neath-Swansea Ospreys 20
Northampton Saints 8 Racing Métro 32
Llanelli Scarlets 3 Toulon 26
Ulster 26 Leicester Tigers 7
Montpellier vs Toulouse
Bath vs Glasgow Warriors
Clermont Auvergne vs Saracens
Munster vs Sale
Photo: Geoff Caddick/AFP Photo