Williams will bring an updated version of their 2012 challenger, the FW34, to the first test at the Circuito de Jerez.
Their 2013 car, the FW35, will not be unveiled until Tuesday 19th February at the start of the second test.
The FW34 will be driven with 2013 livery in Jerez.
A Williams statement says that 'the team will run the 2012 FW34 in order to test a number of key development parts in preparation for the launch of the FW35'.'
Pastor Maldonado and Valtteri Bottas will race for the team this year.
Pre-season launch dates:
McLaren MP4-28 |
Thursday 31st January |
TBC, United Kingdom |
Ferrari TBA |
Friday 1st February |
Maranello, Italy |
Force India VJM06 |
Friday 1st February |
Silverstone, United Kingdom |
Sauber C32 |
Saturday 2nd February |
Hinwil, Switzerland |
Red Bull RB9 |
Sunday 3rd February |
Milton Keynes, UK |
Mercedes W04 |
Monday 4th February |
Jerez, Spain |
Toro Rosso STR8 |
Monday 4th February |
Jerez, Spain |
Williams FW35 |
Tuesday 19th February |
Barcelona, Spain |