This is the 17th video in the NerdDice create a RubyGem series. In this video, Mike finishes refactoring the specs from the previous videos and then comments out the refresh_seed! method and simulates redoing test-driven development to ensure the specs all fail without the code and pass with it. He refactors longer methods out into shorter methods in order to resolve the rest of the Rubocop issues and demonstrates disabling a cop for a method. In the end, he rebases his refresh_seed! commits from the past several videos into a single commit and force-pushes to the branch.