Filtering source

Is there any way of filtering out source files inthe project view of IDEA
3.0?

Specifically, I am looking for a way of filtering out my test-cases which
reside in the same packages as my project source files. So for instance, my
class could be called "com.mycompany.a.b.c.MyHandler" and my test-case
(JUnit) would be called "com.mycompany.a.b.c._TestMyHandler" and I'd like to
be able to filter out the "_Test*" files so that I don't have to see them
(even though they are still there and will still be compiled).

- Ian