International English Language Testing System (IELTS)
A standardized test of English language proficiency designed for non-native English language speakers. It could be a test required for higher studies, migration or work in various English speaking countries such as the Americas, UK, Australia, and New Zealand. The test is jointly managed by the British Council, International Development Program (IDP): IELTS Australia and Cambridge Assessment English.
Similar to OET, IELTS also has four components: speaking, reading, writing, and listening. While the required OET can be achieved by clubbing the best scores from two different tests, all sections of IELTS must be completed in single attempt to be accepted to the required program or for migration purposes.