Williams has confirmed that Robert Kubica and Sergey Sirotkin will join regular Lance Stroll for the post Abu Dhabi Grand Prix Formula 1 tyre test.
Following weeks of speculation, the Grove-based outfit said that the three drivers would split their running across the running that takes place on the Tuesday and Wednesday after the season finale.
Kubica, who is believed to be the frontrunner to land a race seat with Williams in 2018, will drive in the opening morning session, before handing the car over to Stroll in the afternoon.
Sirotkin will take over the car for Wednesday morning and then will hand it back to Kubica later that afternoon so the Polish driver can finish the test.
In a statement, Williams said it hoped to benefit from the different feedback that the three drivers would give it regarding Pirelli's 2018 rubber
"The test is aimed at evaluating 2018 candidate tyres on behalf of the F1 tyre supplier Pirelli," said the team.
"Williams are excited to have this opportunity to assess the new tyres across such an interesting range of drivers: Lance, as confirmed race driver for 2018, Robert with his huge experience and Sergey as a very promising young talent in F1."