The oddb.org uses watir-webdriver with rspec.
All testing on davaz.com are already out of date (not maintained), So I've drop old selenium jar and its support files.
Then setup watir-webdriver and Minitest using new Selenium. (like oddb.org)
And I've also documented in README.md, How to run test in davaz.com.
Currently, all test cases do not work (out of date, broken).
So this is 'How to run a single test without rake'.
% bundle exec ruby -I.:test test/feature/test_shop.rb Run options: --seed 12380 # Running: * Fabulous run in 9.634901s, 0.1038 runs/s, 0.3114 assertions/s. 1 runs, 3 assertions, 0 failures, 0 errors, 0 skips