LoadError by requiring a gem with :path or :git

You'll have to load the bundler environment before running the test.rb

bundle exec ruby test.rb

You can run with the bundler environment via:

bundle exec ruby script.rb

Or require bundler setup in your script before the gem(s) that are causing the issue.

require 'bundler/setup'

Most links I found out there about this pointed to documentation on Bundler's site, but most all of the links are dead now unfortunately.