Renault and Haas's 2017 Formula 1 cars both made their track debuts with filming day runs at Barcelona on Saturday.
Only Renault released footage and images of its RS17, which was launched in London on Tuesday.
The team had been due to run on Friday initially, but rain cancelled that plan and also led to Jolyon Palmer rather than new signing Nico Hulkenberg being at the wheel for the new car's first laps.
“That was really fun,” said Palmer. “Loads of downforce, loads of grip, a few laps, no hiccups and a big smile on my face.”
Haas images leak across internet
Haas is keeping its VF-17 under wraps until Sunday, although images of the car running did leak out on social media.
New Haas driver Kevin Magnussen described the day's work as “filming and doing some interviews and some adverts”.
The photos were snapped in the Barcelona pitlane, where staff from rival teams were setting up for their running.
They show a VF-17 car with a predominantly grey, red and black livery, with a jagged-effect paint scheme on the engine cover’s shark fin. Romain Grosjean was at the wheel.
Haas launches its car officially on Sunday, along with Red Bull Racing and Toro Rosso.