For international students, one of the most common questions during the application process is: Do schools actually prefer TOEFL, IELTS or the Duolingo English Test (DET)?
The short answer: No, they don’t.
Most universities list several accepted tests on their official admissions websites – TOEFL, IELTS, the DET and others. Once a test is listed, it means the school recognises it as a valid and reliable measure of English proficiency. In other words, there’s no hidden bias in favour of one over the others.