$ ruby19 test/json/runner.rb
test/json/runner.rb:3:in `require': no such file to load --
test/unit/ui/console/testrunner (LoadError)
        from test/json/runner.rb:3:in `<main>'

$ ruby19 test/yaml/test_yaml.rb
Loaded suite test/yaml/test_yaml
Started
...........................................................
Finished in 0.410006 seconds.

59 tests, 206 assertions, 0 failures, 0 errors, 0 skips
test/yaml/test_yaml.rb:1292:in `<main>': uninitialized constant
Test::Unit::TestSuite (NameError)


Are these OK?

-- 
Yusuke ENDOH <mame / tsg.ne.jp>