Toro Rosso's Pierre Gasly is still encouraged with the team's relationship with Honda, saying the Japanese manufacturer are working toward a "big, big plan" in the future.
The Honda-powered car ran reliably throughout winter testing, but Honda's engine issues were exposed once again in the season opener when Gasly was forced to retire due to a MGU-H failure.
But the Frenchman is happy to remain patient with Toro Rosso's new engine partners as he feels there is a brighter future ahead.
“On their side they are pushing flat out because they really want to show everyone they can do proper engines,” said Gasly via Motorsport.com.
“And in terms of the development already they are pushing flat out and we can see some really positive progress.
“We are pushing to have as many upgrades as we can, but of course we know we only have three engines so we need to see exactly when is the best time to bring them.
“It’s all going well, but we also need to give them [Honda] time because it’s Formula 1 – they are all pushing: Mercedes, Ferrari, Renault, they are all pushing and improving all the time.
“For sure they [Honda] cannot recover everything in only three or four months, but in terms of medium to long-term collaboration I think they have a big, big plan ahead, and at the moment they are doing the right things and really pushing hard.”