class Rails::Command::TestCommand

def perform(*args)
  $LOAD_PATH << Rails::Command.root.join("test").to_s
  Rails::TestUnit::Runner.parse_options(args)
  run_prepare_task if self.args.none?(EXACT_TEST_ARGUMENT_PATTERN)
  Rails::TestUnit::Runner.run(args)
rescue Rails::TestUnit::InvalidTestError => error
  raise ArgumentError, error.message
end