IntelliJ Idea working directory hint

I was struggling with running our unit tests in Idea for some time. Problem was that we have many modules and some of our tests using files try to find them through working directory instead of classpath. So every time I needed to execute test/suite from different module I needed to change working directory of test to point to its own module.

Finally I was able to find great solution (I really do not understand why I did not try it sooner :-) ). Just open Run/Debug dialog, click to Edit Defaults and write $MODULE_DIR$ into Working directory: field.