British Formula 3 squad Fortec Motorsport could run Formula Renault BARC race winner Sam MacLeod in the series next season.
The 19-year-old, who competed with Fortec this year in Renault BARC and selected FRenault NEC rounds, tested one of the team's Dallara-Mercedes for two days at Valencia.
It came straight after MacLeod tested with the German Formula 3 Cup arm of Dutch squad Van Amersfoort Racing at Barcelona.
Fortec team manager Andi Scott said: "If you look at the times from Valencia, his performance has been fantastic.
"I expected him to need time to get up to speed, but he was very competitive with guys who have been racing in European F3 this year who were out at the same time."
Scott said he would be keen for MacLeod to join Fortec's British F3 squad in 2014.
"That is our plan," he said, "and that's why he's been out testing with us. He is someone we want in the team."
Fortec also tested runaway German F3 Cup champion Marvin Kirchhofer at Valencia.
Sources indicate that, although Kirchhofer is strongly tipped to graduate to the GP3 Series, he could combine this with a programme in the F3 European Championship.
Kirchhofer tested with Prema Powerteam in October but it is understood that there is little chance of a tie-up with the Italian squad.
Scott added: "The team were very happy with him. He went well and his feedback was very good."
CHANG SET FOR BRITISH F3
Chinese teenager Andy Chang, who contested late-season British Formula Ford events and the Formula Masters China race in Macau, will compete in British F3 next season.
Sources close to Chang say he is in dialogue with Falcon Motorsport, which ran him in Formula Ford, as well as established F3 squads.