[Always *]

They do have to take a test. Anyone in my country who is applying to an English speaking school are made to fake a test before they can get in to prove English proficiency. The exception is if they went to a school where the language of instruction was English. So if I was an Indian foreign student but had already gone to school at a school that instructed in English, I could skip the test, but you'd still have to provide proof of English instruction OR take the test.