The reigning world and European champions were disappointing in the first half but improved after the break following several changes at the interval, including Adrian Lopez, who grabbed the opener and who won the penalty for the second, which Santi Cazorla dispatched.
Roberto Soldado and Alvaro Negredo started the match in attack together, but both flattered to deceive. However, Del Bosque confirmed he would judge his forwards on their performances over the course of the season and not the one friendly.
"The most real type of training possible is a match and we have simply completed a cycle of training sessions with a friendly," the former Real Madrid trainer told reporters after the game.
“We brought Adrian with us for this reason and he has the same chance as he did before today.
“Soldado also did well against Venezuela and Negredo with his club. I will value what they have done throughout the season.”
Meanwhile, Adrian was delighted with a goal on his senior debut and is keen to reach Poland and Ukraine after helping guide the Under-21 team to Euro glory last summer.
“I am very happy to have debuted with a goal. The coach gives the list tomorrow and I am very excited. It would be fantastic to go to the Euros," he added.
“I am happy with my performance this year with Atletico and for this work with my club I have entered the squad.
“Now, though, the competition is of a very high level and it is good that the coach has a lot to choose from. It will be difficult for him to do so.”
Del Basque lists his final 23-man squad on Sunday, with Spain set to face South Korea in another warm-up friendly on Wednesday.