The practice of agile software development requires a clear understanding of business needs. Misunderstanding requirements causes waste, slipped schedules, and mistrust within the organization. Jared Richardson shows how good acceptance tests can reduce misunderstanding of requirements. A testable requirement provides a single source that serves as the analysis document, acceptance criteria, regression test suite, and progress-tracker for any given feature. Jared explores the creation, evaluation, and use of testable requirements by the business and developers.