Pirelli motorsport boss Paul Hembery says things have to change if they are to stay in Formula 1 next year.
While Hembery insists Pirelli are keen to stay on in their role as F1 tyre supplier, he says there is currently no deal in place for 2014 and any new agreement will have to feature some changes to prevent them from walking away.
The relationship between Pirelli and the sport must evolve, says Hembery, and first on the agenda is allowing the manufacturer to test its tyres on current cars to aid with development.
"At the moment we have no real indication what the 2014 cars are going to be like and in a couple of months we're meant to be all ready to go," he told ESPNF1.
"I guess it's not in the teams' briefs to understand what our problems are or our needs are. In the past when previous suppliers have been in they had a few years of tyre competition so you do more in one week of tyre testing than we've done in three years. That creates a lot of knowledge and a lot of background, which we've not been able to do.
"We've only really performed a proper tyre test - when you've been running 14/15 specifications, short runs, long runs - we've only done it once with a current car in three years and that's simply not good enough.
"They're things that have to change, we couldn't possibly risk putting ourselves in that situation again. There's no doubt it has to change. If the sport doesn't want to change then they can find someone else. We want to stay obviously but we need to make some changes, we can't just keep talking about it, things now have to change."
Hembery added that there is a growing friction between themselves and the teams, which isn't making things any easier.
"The teams in the first year were quite a lot better at working together and we've seen that dissipate over the last two and a half years," he said.
"That's not just with us, I think there's lots of things going on there behind the scenes with new agreements - the Concorde Agreement - and things like that, some teams struggling, so there's a lot more friction between the teams than we've seen before. Whilst individually we have fantastic support from all of them, collectively it's not quite there.
"We know going forward that a lot of things have to change and that's something that we need to have fixed because we can't be in a situation like this again."