Haas has long cited a lack of consistency with the brakes and has been working with Brembo for several months in a bid to find a solution.

But it has also arranged to test new brakes from Carbone Industrie at the in-season Bahrain test, which started today.

After running the new Brembo brakes during the Bahrain race weekend, Grosjean declared himself happy - but highlighted the length of time it had taken.

"We had an update from Brembo and it worked much better than it was before," said Grosjean, who scored his first points of 2017 in Bahrain.

"It was clearly a big step. It took quite a while to get the update. We're going to try something different and see how it goes."

Grosjean, who is particularly sensitive to brake feel, said the update was "a very different story" with an improvement in the "consistency" allowing him to attack.

But having previously said the only solution for Haas's ongoing brake difficulties is to change suppliers as soon as possible, he remains excited to test the new brand.

The team tried products from Carbone Industrie during last year's Brazilian Grand Prix with Grosjean complimentary after testing them.

"I'm looking forward to getting the other brand because last year it changed a lot the end of the braking and the feeling going into the corners," he said.

"Let's see if we still have a lot of improvement. I think the delay will be less big. The new update worked pretty well but as I say, I'm looking forward to trying that.

"There is quite a lot on the menu to see where we can improve the car."