Super Aguri have withdrawn from testing in Spain, prompting fears about the financial future of the team ahead of the Australian Grand Prix on 16 March.
Super Aguri have yet to confirm their 2008 drivers
Next week's test in Barcelona will be their last chance to try the cars before they are flown to Melbourne.
"We are planning to attend the test at the Circuit de Catalunya next week with two cars," said team head Aguri Suzuki.
The cash-strapped Japanese team have held talks with potential backers but have yet to strike a deal.
Super Aguri had postponed their official launch of their 2008 car last week in the hope of finding an investor.
And the Honda-backed team have yet to confirm their drivers for the forthcoming season.
But they have said they expect to continue with Japan's Takuma Sato and Britain's Anthony Davidson, who drove the team to ninth place overall in 2007.