The final Formula 1 test of the winter has changed dates - moving from 8-11th to 9-12th March.
Williams technical director Sam Michael confirmed to AUTOSPORT that a one-day date adjustment for the Barcelona sessions had recently been agreed.
The additional test at the Catalunya circuit fills the gap left vacant by the cancellation of the planned 3-6 March test and 11-13 March grand prix in Bahrain, both of which were called off following political unrest in the country - though the race may yet be rescheduled for later in the year.
The championship itself now begins with the Australian Grand Prix in Melbourne on 25-27 March.
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