Stefan GP officesStefan GP has announced it will test its first Formula 1 car later this month in Portugal, as it continues to push with its plans to race in the sport this year despite not having an officially approved entry.

Following today's announcement that the Serbia-based squad will send equipment to Bahrain for the first of the season, the team said it will test its car at Portimao on Feb. 25-28.

Stefan GP said it will unveil the Stefan S-01 before the tests. AUTOSPORT reports that former Williams driver Kazuki Nakajima will be one of the team's drivers.

Stefan GP said its car has been developed by the team and with technical support from Toyota, with which it has agreed to a technical partnership. The engine it will use is the Stefan RG-01, also serviced by Toyota.

The team said it will be testing two drivers at Portimao.

Stefan GP released the above picture of its offices, in which team owner Zoran Stefanovich can be seen with former McLaren chief designer Mike Coughlan.