https://medium.freecodecamp.org/how-to-dockerize-your-end-to-end-acceptance-tests-dbb593acb8e0 > This article serves as a “how-to” guide for using Selenium Docker images alongside CodeceptJS and an Express server. > Acceptance testing is a phase in a typical software development process. It covers tests to see if the product has met the overall requirement specifications, and if it is “accepted” as ready for delivery. It is typically the last phase of testing before releasing the product to production. This could include user-based acceptance tests, business-based acceptance tests, or even alpha/beta testing.