Since about a year and a half, I do a lot of presentations on Mutation Testing. In those, my point is to show that Code Coverage’s only benefit is that it’s easy to compute but that it’s meaningless - hence Mutation Testing. Since some time, I’ve been interested in Kotlin, a language from JetBrains that runs on the JVM. It’s only natural that I wanted to check how Mutation Testing could be applied to the Kotlin language.