Haas will wait until March to run their first F1 car, putting an end to talk of a December shake-down.
Previously there had been reports that Haas, who will enter Formula 1 next season as the sport's 11th team, could run their new car as early as December.
However, team principal Guenther Steiner now says it won't be until the first pre-season test – or perhaps a day before.
"On 1st March 2016, on the first all-team test day," Steiner told Formula1.com when asked when his team's new car would make its debut.
"It could be that we will perform a shake-down one day before – on 29th February – but nothing more is planned so far."
As for the reduction in pre-season testing, which in 2016 will be cut to just two four-day outings, Steiner has opted for a philosophical attitude.
"I wouldn't say [it's] a problem – it is what it is," he said. "We have to live with it."