Stop using bundle exec. Integrate Rubygems and Bundler. Make rubygems generate bundler aware executable wrappers.

Appraisal integrates with bundler and rake to test your library against different versions of dependencies in repeatable scenarios called "appraisals."

Guard::Bundler automatically install/update your gem bundle when needed

Stop using bundle exec.

Use bundler to generate gem tarball packages.

A bundler plugin that starts a console session with your gem dependencies.

Attempt to update every single gem of your Gemfile to its latest patch, minor then major release. Runs a test command to ensure the update succeeded