This is known as International English Language Testing System.

The international English Language Testing System or IELTS is an international standard test for English language proficiency for non-native English language speakers. It is collectively managed by the British council, DIP, IELTS, Australia and Cambridge Assessment English and happened to be created in 1989.

Score / grade validity: 2 years
Score / grade range: 0 to 9, in 0.5 band increments
Annual number of test takers: Over 3 million in 2017
Scores / grades used by: More than 10,000 colleges, agencies and other institutions in over 140 countries
Countries / regions: More than 1,200 test centres in over 140 countries
Knowledge / skills tested: Listening, reading, writing and speaking of the English language