Christian Horner is adamant Mercedes' Young Driver Test ban should stand despite their rivals being granted even more scope to test.
Mercedes were banned from this year's Young Driver Test after running a 2013 W04 during their own three-day test with Pirelli earlier this season.
However, at the time of the ban the test was, as its name dictates, an outing for young drivers.
Since then the FIA have given Merc's rivals permission to run their regular drivers for one of the three days while it has also emerged that other restrictions had been lifted.
Teams will now be permitted to work on the balance of their cars on the new Pirelli tyres, although updates for the cars are still prohibited.
Horner, however, still stands by his belief that the Merc's ban is fitting.
"Absolutely," the Red Bull team boss told the official F1 website.
"They've already done their three-day test. With both drivers! One thousand kilometres!
"It is not about justice. I think the right decision was made by the FIA to allow Pirelli a tyre test at the young driver event - and for teams to put experienced drivers in the cars to give experienced feedback.
"This is a logical and correct solution. There are no winners out of what happened last weekend, so it is important that we work together and find a solution."