Sam Ward also found the net but two goals from Matias Paredes and Gonzalo Peillat’s penalty corner sealed victory for the visitors.
“We fell right into their trap as we were sloppy at times in possession which allowed them to counter-attack,” said GB head coach Bobby Crutchley.
“That’s what they’re looking for and that’s why it’s frustrating.”
Britain is now in the midst of preparations for the World League Final 27 November in India. The test match will assess both their mettle and poise.
The second Test against Argentina will be held on Wednesday at the same venue.