test your gem locally before publishing. • STEP 1 - cd into your gem directory and run gem build your-gem.gemspec • STEP 2 - in the same directory then run gem install ./your-gem-<version>.gem (<version> will be replaced by the current version of your gem) • STEP 3 - Now cd into your project where you want to install this gem. • STEP 4 - Open Gemfile and add gem 'your-gem', path: '/path/to/your-gem' (Replace /path/to/your-gem with the actual path to your gem. #ruby-gems , #rails TIP: you can get your path by running pwd in your terminal where you have opened your gem file.