You can get a foreign licence validation without any exams, but I do recommend doing the PSTAR test - 50 multi-choice questions, after a day or two study.
I've flown light aircraft in 4 countries, and they have ALL had differences, which though they might seem minor, CAN cause problems.
The PSTAR is free, and the 50 questions are just a selection of a total of 200 questions - so understand the 200 and you'll be fine (the 200 cover almost everything of importance).
That's my tuppence worth!
Dupre.