I have a maven project forked and cloned from a git repo onto my eclipse. It is build on Java 8. The first thing i do is perform a
mvn clean install
I am not able to run my own build on the other suggestions here. I even tried different versions of maven-compiler-plugin: 3.1, 3.7.0, etc.
I made it work adding this:
/src/test/java
I tried this approach because it seems like the /src/test/java directory is considered a java class that is why it is compiled the same time as /src/test/java. So my hunch were right in my case.
Maybe it is to others too, so just try this one.