Turn off concurrency in tests to avoid race conditions in Capybara.
Use RSpec and JSON Schema to create a test-driven process in which changes to the structure of your JSON API drive the implementation of new features.
Learn one simple way to speed up your tests with the factory_girl gem!
During my Test-Driven Rails workshop earlier this week (which is also...
Use Webmock to mock HTTP requests to external services in a simple and predictable way.