Red Bull rue lack of running, but are content with pace.
The Jerez Formula One test brought mixed fortunes for the Red Bull team, with the knowledge that Renault has made a step forward tempered by the fact that a series of problems restricted running.
Aside from power unit issues, day two of the test was wasted after Daniil Kvyat damaged the only front wing the team had available for that day.
The final afternoon of work on Wednesday did at least allowed for some consistent running from the Russian, and the team insisted that it had been a productive test after all.
"Once we'd sorted the issue the car ran perfectly all afternoon," said head of race engineering Guillaume Rocquelin.
"And we were able to get through the key elements of the programme we had mapped out.
"This week has all been about establishing reliability, and while we've had a few niggles the car is pretty much where we want it to be.
"We focused on medium and long runs all week and Dany was able to do more of that work this afternoon.
"We did lose track time over the four days and that's always frustrating, as you inevitably have to scratch some things off the 'to do' list, but the major items were covered so I would say we're leaving Jerez in pretty decent shape."