At the time of this writing...

To get JUnit5 up and running, one has to install (via lib directory, Maven, Gradle etc.) at least the following:

1. org.junit.jupiter:junit-jupiter-api:5.3.2
2. org.junit.jupiter:junit-jupiter-engine:5.3.2
3. org.junit.jupiter:junit-jupiter-params:5.3.2

Wishing above helps!