The tree in the JUnit Test Result window should be a bit more detailed. 

I usually create a unit test for every class and a TestSuite for every package
containing all unit tests of this package. Furthermore I have some more complete
TestSuites that consist of a lot of package-TestSuites combined.

Now when I run JUnit on one of the suites I get a tree with the class name of
the TestSuite and all involved test method names as nodes. It would be much
better if this tree would indeed be more treelike. E.g. a combined test, all
packages tests as child of this and all classes as child of the package tests
and finally the methods as childs of the tested classes - or whatever the actual
hierarchy in a project might look like. 

It would look like the following:


AllTestsTestSuite
  |
  +-- PackageTestSuite1
      |
      +-- TestClass1
          |
          +-- testMethod1
          |
          +-- testMethod2
      |
      +-- TestClass2
          |
          +-- testMethod1
          |
          +-- testMethod2
  |
  +-- PackageTestSuite2
      |
      +-- TestClass3
          |
          +-- testMethod1
      |
      +-- TestClass4
          |
          +-- testMethod1
          
This would look much more like the classic JUnit Swing-based TestRunner and one
would feel more at home with using JUnit in Netbeans. I think the JUnit
TestResults window should look as much like the Swing-based TestRunner as possible.
   
An - albeit not as good - alternative would be to include the class names of the
TestCase-subclasses prior to the method names. Like:

AllTests
  |
  +-- TestClass1.testMethod1
  |
  +-- TextClass2.testMethod2