Explore domain-driven testing principles and practices in this 54-minute conference talk from Devoxx. Learn how to become a more effective tester by understanding the product domain, avoiding "Programming by Coincidence," and improving user experience. Discover the importance of ubiquitous language, context mapping, and design by contract in testing. Follow the speaker's journey in the website building software industry, gaining insights on preventing common problems and leveraging industry knowledge. Examine the DDD test pyramid, and explore tools like BackstopJS and Protractor with Cucumber to enhance your testing approach. Gain valuable strategies to defend against releasing functional but unusable products and elevate your testing skills from good to great.