The increasing trend of developing and using locally produced tests of English in Asia makes a book of this nature a necessary endeavor. This opening chapter first contextualizes the trend and defines the related concepts of test localization and glocalization. It then introduces common themes that appear in subsequent chapters. By focusing on a single local English language test developed in a specific Asian context in each of these chapters, the work aims to provide readers with an in-depth understanding of how these tests are able to both cater to local needs and meet globally recognized testing standards. The positive impact and legacy of these six Asian-made tests, not least in terms of enhanced expertise, represent a radical paradigm shift in approaches to English language tests, which is also transferrable to other L2 tests.