If you haven't tried the new and shiny IntelliJ IDEA 2016.3 yet, there's a good reason to do it right now. Welcome IntelliJ IDEA 2016.3.1, an update that brings lots of important bugfixes.
One of the most notable changes in this build is the long-awaited support for JUnit 5 M3, so if you plan to keep running JUnit 5 M2, you have to either use IntelliJ IDEA 2016.3 (or earlier), or manually include JUnit 5 M2 dependencies in your classpath (junit-platform-launcher, junit-platform-commons, junit-platform-engine; junit-jupiter-api and junit-jupiter-engine for Jupiter; and junit-vintage-engine f