Toro Rosso has confirmed that it will use 2015-specification power units in its STR11 next year, ending its relationship with Renault.
Toro Rosso used Ferrari engines until Formula 1 switched to 1.6 litre V6 power units prior to the start of 2014, at which point it aligned itself with sister team Red Bull in utilising Renault power.
With Renault confirming its take over of Lotus, and Red Bull announcing it will run Tag Heuer-branded Renault power units, Toro Rosso has been able to formally confirm its move to Ferrari.
"It's great to be working with Ferrari again," said Toro Rosso team boss Franz Tost.
"We had a fruitful relationship in the past and I'm sure it won't take long for us all to be working together very well again.
"It's true that time will be very tight for us to be ready for the first test, but we have the right team of people for this and I'm confident that together we will achieve a competitive package for next year – bring on 2016."
Toro Rosso will once again field Max Verstappen and Carlos Sainz Jr. as its driver line-up.
Ferrari will also supply Sauber and the new Haas squad with current-year power units.