This document discusses testing approaches in agile development. It notes that with agile development using 2 week cycles, there is a shift from bug detection to bug prevention. It outlines the roles of testers and developers in agile teams, with testers focusing on manual testing and rapid feedback while developers rely more on test-driven development and automation. An example is given of how Atlassian uses both developers and testers by having testers focus on domain knowledge and manual testing of primary artifacts while developers concentrate on test automation and infrastructure. The key to their approach is emphasized as test automation within a continuous integration pipeline.