He will be partnered by Brazilian rookie Nelson Piquet Jnr, son of three-times world champion Nelson Piquet.
Piquet takes the place of Heikki Kovalainen, his predecessor as GP2 runner-up and Renault’s previous test driver in 2006.
Kovalainen is expected to be confirmed as Lewis Hamilton’s team mate at McLaren for 2008. Kovalainen had earlier commented that he did not want to be at a team where he would be forced into a number two role, suggesting he did not want to partner Alonso.
Reports suggest Alonso has signed a three-year deal, refuting earlier rumours linking him to a deal with Ferrari for 2009. Renault has also confirmed F3 Euroseries champion and Renault Development Driver Romain Grosjean as a test driver for 2008.
More on the 2008 F1 season