I never took a test in Malaysia. They appeared to accept my British licence.
However, around 1981/2 or so, I applied for a driving licence in Qatar. It consisted of answering a few road signs questions (virtually all based upon the British system) and an eye test. The eye test was similar to our own but was a reducing size of upper case "E"s all pointing in different directions (up, down, left, right). The examiner pointed to one of the "E"s and you needed to indicate which way it was pointing. Piece o'piss really but for farangs they only concentrated on the top three rows and the chart was only just behind the desk. For Indians, Pakistanis, Egyptians,etc, the chart was the full length of a 5 metre corridor!
My boss at the time was not allowed to take the test with his glasses on because on his proffered photograph intended for the licence, he was not wearing glasses. We got over it.