Caterham has announced it will have its 2014 car ready for the start of official 2014 testing.
Lotus, fourth in 2013 but struggling with financial problems, said earlier this week it will not be at Jerez for the first four-day test, which will feature all-new cars and turbo V6 engines for the first time.
But the other teams are all expected to be in southern Spain, with Jerez one of only three four-day tests scheduled before March's Melbourne season opener.
Adrian Sutil has indicated Sauber, having also struggled financially in 2013, will be at all three tests at Jerez and Bahrain, and backmarker Caterham said on Wednesday it will also have its 2014 car ready to run.
"We'll be at all three tests," the team announced on Twitter, "and we'll unveil the 2014 car on the morning of day one (of the first test), 28 January."
"Knew we'd forgotten something!" Caterham joked when asked by one of its 160,000 followers if it was "not bothering" about signing drivers for 2014.