I use minitest-rails as a testsuit for my rails app but cannot get it working on 9000.
So when I run it under 1.7.18 it executes all my controller tests with:
rake test:controllers

Under jRuby 9000 it only runs:
** Invoke test:controllers (first_time)
** Invoke test:prepare (first_time)
** Execute test:prepare
** Execute test:controllers
Then just quits no output at all.