cls.register_jvm_tool(register,
                          'junit',
                          classpath=[
                            JarDependency(org='org.pantsbuild', name='junit-runner', rev='0.0.13'),
                          ],
                          main=JUnitRun._MAIN,
                          # TODO(John Sirois): Investigate how much less we can get away with.
                          # Clearly both tests and the runner need access to the same @Test,
                          # @Before, as well as other annotations, but there is also the Assert
                          # class and some subset of the @Rules, @Theories and @RunWith APIs.
                          custom_rules=[
                            Shader.exclude_package('junit.', recursive=True),
                            Shader.exclude_package('org', recursive=True),
                          ])