| Name | Lines of code | Maintainability | Test coverage |
| lib/capybara/webkit/matchers.rb | 33 | A 0 mins | |
| lib/capybara/webkit/cookie_jar.rb | 39 | A 0 mins | |
| lib/capybara/webkit/errors.rb | 41 | A 0 mins | |
| lib/capybara/webkit/connection.rb | 74 | A 0 mins | |
| lib/capybara/webkit/configuration.rb | 88 | A 0 mins | |
| lib/capybara_webkit_builder.rb | 89 | A 0 mins | |
| lib/capybara/webkit/server.rb | 92 | A 1 hr | |
| lib/capybara/webkit/node.rb | 198 | C 7 hrs | |
| lib/capybara/webkit/browser.rb | 291 | D 1 day | |
| lib/capybara/webkit/driver.rb | 388 | D 2 days | |
| src/capybara.js | 477 | F 3 days |