Lotus will be using Renault power through 2014 and beyond after agreeing a new long-term deal with the French manufacturer.
Although this year's pre-season has not gone well for Renault, Lotus are keeping faith with the company into the new 1.6-litre turbocharged era.
While confirmation for this season was a mere formality, the Enstone-based team has revealed they will continue to use Renault power for "2014 and beyond."
Lotus CEO Matthew Carter said: "The Lotus F1 team and Renault Sport F1 have enjoyed a successful partnership these past few years and we look forward to continue to build on our relationship and collaboration in 2014 and beyond.
"It is the beginning of a new era in Formula 1 and we are pleased to embrace it together with Renault Sport F1."
Meanwhile, Renault Sport F1 president Jean-Michel Jaliner says the relationship between the two parties remains close.
"We are pleased to see our partnership officially confirmed as the E22 takes to the track for its first official test," he said.
"The relationship between Viry and Enstone has gone from strength to strength over the past few years.
"This is illustrated in no better way than the excellent - and very close - collaboration on the 2014 car, which is more technically complex than any previous designs.
"We hope this spirit will pay dividends on track this season and going forward into the new F1 technical era."