Agile teams practicing Acceptance Test Driven Development (ATDD) define acceptance tests collaboratively while discussing each story. This practice helps uncover assumptions and confirm that everyone has a shared understanding of “Done”. During implementation, the technical team automates the natural-language Acceptance Tests by writing code to wire them to the emerging software. In this way, ATDD tests become executable requirements. This session is a demo of the full ATDD workflow from initial discussions to distilling tests into an automatable format to implementing code to the final demo.