The general rule is this: each FrameFlex provisioning site must have an associated cleanup site.
Optionally, if your method @Beforeinitializes FrameField (as in:, w = new FrameFixture<MyWindow>()where w is the field of the test class), you must define a method @Afterthat will free resources through w.cleanUp().
. : http://docs.codehaus.org/display/FEST/Getting+Started.