The practice was banned in 2009 as F1 looked to cut costs at a time when the global credit crunch was biting hard and manufacturer teams like Honda, Toyota and BMW were quitting the sport.
The clamour from the teams, however, has grown for a return in recent times, with the first hurdle now overcome.
Following a meeting of F1's Sporting Working Group on Saturdayday in the Montreal paddock, journalists understand eight of the 11 teams voted to bring back in-season testing.
The plan is for four two-day tests to be tacked on to the back of a European race, with running taking place on a Tuesday and Wednesday.
Circuits such as Barcelona and Silverstone are likely destinations, although the venues will ultimately be determined by next year's calendar.
To ensure costs are kept to a minimum there is a trade-off as there will no longer be the three-day young driver test, with the four days of aerodynamic testing cut to two.
Currently eight promotional events are also allowed, with a maximum distance of 100kms, but these will also be cut to two, whilst wind tunnel testing will be slashed from 40 to 30 hours.
The proposals now just need to be cleared by the FIA's World Motor Sport Council, which is due to meet on June 28 ahead of the British Grand Prix.
F1 now faces the prospect of its busiest season as the teams have already agreed to begin testing from late January as they prepare for the arrival of new engines, with turbo-charged 1.6-litre V6s replacing the current 2.4-litre V8s.
At least one of the three four-day pre-season tests will take place in the Middle East to guarantee warm weather and ahead of Bahrain opening the campaign, with official confirmation pending.
There is also the possibility of the calendar being further expanded to 21 races as the GP of America in New Jersey and Russian GP around the Olympic park in Sochi will be new additions.