Williams has confirmed Susie Wolff will drive for the team on the opening day of the second pre-season test.
Wolff was promoted to the role of test driver at the end of 2014 after completing two Friday practice sessions at the British and German grands prix. As part of the enhanced role it was announced that Wolff would drive on one day of testing ahead of the start of this season, with Williams now confirming its plan for the second test at the Circuit de Catalunya.
With Wolff driving on the first day, Felipe Massa will take over for day two before Valtteri Bottas drives on day three. Massa and Bottas will then share duties on the final day of the second test.
Wolff's enhanced role will also see her complete another day of testing later in the season - with two in-season tests set to take place following the races in Spain and Austria - as well as another two Friday practice sessions.
Alex Lynn joined Williams as development driver over the winter after leaving the Red Bull young driver programme, with former test and reserve driver Felipe Nasr having secured a race seat at Sauber this season.
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