This http://jetbrains.net/jira/browse/IDEADEV-2614 is marked as a feature request that will is planned for the next version (not 6.0). I think it's a bug. When I right-click on a path and select 'Run "All Tests"' I want to run all tests below that source path and not all tests in all modules.
The current behavior - to run all tests in all modules instead of the ones in the selected path - is totally unintuitive and a backward step compared to earlier versions of IDEA.
The feature that allows to create a run configuration for all tests in all modules is great, but it shouldn't make IDEA as unintuitive as it does right now.
Now I have to create an "All Tests" run configuration for each project to be able to run tests for specific modules.