Gem::InstallError: minitest 需要 Ruby 版本 ~> 2.2

Question

Currently I am getting following error while doing bundle install

Gem::InstallError: minitest requires Ruby version ~> 2.2

It is trying to install latest minitest gem version (ie 5.12.2 which is released on September 29, 2019)

I checked my both Gemfile and Gemfile.lock files but I didn't found my traces of minitest gem. So I am thinking it is a dependency gem.

I tried to do forcefully install its version to 4.7.5 which is previous version by defining in gem file as gem 'minitest', '4.7.5' But still it is trying to install version 5.12.2 .

System details:

• ruby 2.1.5p273
• bundler (1.12.5)
• Rails 3.2.17

So how can I fix this issue.

EDIT

After debugging I found that rspec-core has dependency of minitest.

Answer 1

I just got this error when rebuilding the bundle of an old Rails program. I checked Gemfile and the gem wasn't there. I deleted Gemfile.lock and didn't get the error when I rebuilt the bundle.

Answer 2

gem 'minitest', '~> 4.7.5'

Edit your Gemfile something like this. Make sure there are no minitest gems already installed, remove them if any.

gem list | grep minitest