Bachelaert said: "I'm very pleased to be giving these two young, talented, French drivers a chance to test our Champ Car. I think they will be a good fit in these cars.
"Guillaume might have less experience in powerful cars, although he tested a GP2 car lately, but he has proven results in F3 that allow me to think he will adapt quickly and also do well in a Champ Car.
"I'm anxious to see how they both perform next week."
Moreau finished ninth in this season's Formula Three Euroseries, racing for the Signature team, but was a race-winner in the championship in 2005.