This article advocates making the provision of opportunities for learning the main objective of language testing. It recognizes the need for tests to be fair, valid, and reliable, but asserts the priority of what it calls "learning validity", in order to prevent time being wasted on language courses on tests, and the preparation for them. The article lists what can be learned from tests with learning validity, and then discusses why such benefits are rare. It surveys the literature on testing in an attempt to find support, and then provides examples of ways of testing which could help language learners to learn from being tested. In particular, it looks at how learners could really benefit from their preparation for tests, from taking tests, and from constructive feedback whilst and after taking them.