Pirelli has formally confirmed that it will remain as Formula 1's sole tyre supplier until at least the end of the 2019 season.
Pirelli has been the sport's sole supplier since 2011 and last October provisionally agreed to remain in its current position for the next three years.
The Italian manufacturer has now confirmed that it has come to an agreement with the FIA for the 2017-19 period.
"This deal was completed over the winter, during which the FIA and Pirelli – in collaboration with the teams – agreed important changes to the technical regulations," read a statement issued by Pirelli.
"From 2017 there will be new technical regulations, including significant changes to the bodywork and wider tyres.
To prepare for these major changes, Pirelli put forward the need to modify the sporting regulations regarding tyre testing to the Teams and the FIA.
"The resulting modification now means that the following tyre tests can take place this year:
"1. Tests with 2012, 2013 or 2014-specification cars, using tyres in the current size but with prototype elements (in the constructions or compounds) to prepare for 2017.
"2. A total of 25 days of testing with modified 2015 cars, using prototype tyres in 2017 size: 305/670-13 at the front and 405/670-13 at the rear (for slick tyres).
"The testing described in point one is already underway, based on an agreement with the FIA and the teams."