The FIA has confirmed that Abu Dhabi and Hungary will complement Bahrain in this year's in-season group test schedule.
Bahrain will kick off the in-season sessions on April 18/19, but Hungary has come about as a switch from Silverstone, and will take place on August 1/2.
Teams will have a free agenda at these tests, but will have to run young drivers who have competed in fewer than three Grands Prix on two of the four days.
Abu Dhabi will once again host a post-season test on November 28/29, but for "the sole purpose of providing all competitors with the chance to test the tyre specifications to be used the following season," according to the governing body.
Pirelli will therefore trial its 2018 compounds before the December 1 extended deadline set by the FIA yesterday.
F1 2017 group test plans
Barcelona Feb 27 - March 2
Barcelona March 7 - March 10
Bahrain April 18 - 19
Budapest August 1 - 2
Abu Dhabi November 28 - 29
GALLERY: F1 drivers' wives and girlfriends
Keep up to date with all the F1 news via Facebook and Twitter
Max Verstappen wrapped up his opening day at the Abu Dhabi Grand Prix sounding upbeat…
McLaren boss Zak Brown has brushed off a claim from Australian senator Matt Canavan that…
Lando Norris closed out Friday at the Abu Dhabi Grand Prix with authority, topping the…
Full results from Free Practice 2 for the Abu Dhabi Grand Prix at Yas Marina,…
Intrigue is swirling around Adrian Sutil after the former Grand Prix driver was arrested in…
On this day in 1975, a somber mood enveloped St Albans Abbey in Hertfordshire as…