Pastor Maldonado will evaluate an aggressive new rear wing design for Williams during free practice for the Canadian Grand Prix.
The team has admitted that the performance of its DRS has held it back at times this year, particularly in qualifying.
Maldonado added that the new design, which has a more curved profile than its predecessor, is part of a raft of updates for this weekend.
"In Barcelona it was OK," Maldonado told reporters about the performance of the DRS. "We have a new rear wing here, and I hope it will be better for the DRS but also for all the weekend.
"It's all to discover. We need to test tomorrow and analyse many things on the car. We have a completely new aero package, so let's see."
At the Chinese Grand Prix earlier this season, Maldonado's team-mate Bruno Senna said that he felt the team could make big gains with an improved DRS.
"If you can get three tenths from the DRS effect, which is not impossible, then you are already jumping three or four positions," said Senna.
"We know all the other teams have a bigger effect [from DRS], so on tracks with long straights it is hard."