End to end testing in Kubernetes apps is usually done with many lines of bash scripts as this may seem as natural progression from testing Kubernetes apps manually with kubectl. Bash is not well-equipped for such tests because users have to create a lot of boilerplate and wrapper functions to make tests reliable. At the same time, Kubernetes provides excellent client libraries in many programming languages. In this presentation, Paweł will show that taking advantage of the client libraries can improve tests speed and reliability, and as a side effect, shorten a feedback loop for developers.