Advanced talk about why and how we migrated thousands of tests from JUnit to Spek and how it helps us write even more tests while keeping them concise and maintainable. Talk covers testing for both JVM and Android platforms. 5+ years of Android development experience, 7+ years of Java, and 2+ years of Kotlin including ~year of Kotlin-only projects in production and everyday work (Juno Android apps, several libraries, and devops tools). Co-host of "The Context" podcast.