The major one is a 13-driver session (9 a.m. - 5 p.m. PT) being held at Infineon Raceway in Sonoma, which will feature both Chevrolet and Honda-powered squads. Once again, the session will be free and open to the public.
Here are the teams/drivers slated to test in Sonoma:
Andretti Autosport - Marco Andretti, Ryan Hunter-Reay and James Hinchcliffe
KV Racing Technology - E.J. Viso, Rubens Barrichello and Tony Kanaan
Team Penske - Helio Castroneves, Ryan Briscoe and Will Power
Target Chip Ganassi Racing - Dario Franchitti and Scott Dixon
Chip Ganassi Racing/"G2" - Graham Rahal and Charlie Kimball
Meanwhile, Ed Carpenter is slated to do a test session with his team (Chevrolet) out at Auto Club Speedway in Fontana, site of this year's season finale in September.