Red Bull are confident they will be on the track at the opening pre-season test in 2016 even though they have yet to secure an engine for the campaign.
The four-time World Champions have found themselves without a power unit for next season after deciding to drop current supplier Renault.
While Mercedes have outright rejected a deal, Ferrari are only offering 2015 engines which Red Bull have stated they are not interested in.
With McLaren blocking a possible partnership with Honda, reports claim Red Bull may yet run an independent engine based on the latest spec Renault unit.
For now, though, Red Bull remain without power but engineering chief Paul Monaghan is confident that the delay won't hampered their chances of taking part in the opening pre-season test.
"We are working towards a deal and if one can be achieved, then that will be announced in time but we will still make it, don't worry," he said.
Pre-season tests gets underway next year at the Circuit de Barcelona-Catalunya on February 22.