The World Rally Championship is considering implementing Formula 1-style group tests in an attempt to curb rising costs.
The majority of the teams are lobbying the FIA to reduce the number of test days available in the WRC, which was raised from 42 to 55 for 2017 when the latest generation of cars were introduced.
An innovative approach to cost reduction could be achieved through a pre-event group test, with all four manufacturers running in the same area on rotated test roads - in the style of F1's in-season tyre and development tests.
That measure is currently being discussed for asphalt rallies only, as the logistics of trying to make a group test work on a gravel surface that degrades quicker pose a more complex challenge.
With most teams currently preparing for Rally Finland, Autosport has learned that a five-day test on location close to the event's Jyvaskyla base has fixed costs of close to £110,000 - which covers only getting the cars and team to the test, and not the cost of running or repairing the cars.
With a testing budget of more than £1m required in the WRC, most of the teams believe the FIA needs to step in.
Toyota's Tommi Makinen is comfortable with the level of testing currently allowed, but M-Sport's Rich Millener told Autosport: "For gravel, we need to cut down the number of days available, that's a fairly route-one fix - probably one the drivers won't like, but the costs are getting silly.
"[But] for asphalt, we have an opportunity to follow F1's lead and do something interesting with the teams together.
"For most of the [asphalt] rallies, we can find four representative roads in an area and share them, rotating around them.