This review article surveys recent developments and validation activities related to four large-scale tests of L2 English ability: the iBT TOEFL, the IELTS, the FCE, and the TOEIC. In addition to describing recent changes to these tests, the paper reports on validation activities that were conducted on the measures. The results of this research constitute some of the evidence available to support claims that these tests are suitable for their intended purposes. The discussion is organized on the basis of a framework that considers test purpose, selected test method characteristics, and important aspects of test usefulness.