minitest/autorunでエラーの解決方法がわからない

Question

以前までエラーが出なかったのですが、minitest/autorunをロードするときにエラーがでるようになりました。

require 'minitest/autorun'

このコードを実行すると、次のエラーになりました。

$ ruby mini.rb 
Traceback (most recent call last):
        9: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/minitest-5.14.2/lib/minitest.rb:68:in `block in autorun'
        8: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/minitest-5.14.2/lib/minitest.rb:126:in `run'
        7: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/minitest-5.14.2/lib/minitest.rb:97:in `load_plugins'
        6: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/minitest-5.14.2/lib/minitest.rb:97:in `each'
        5: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/minitest-5.14.2/lib/minitest.rb:103:in `block in load_plugins'
        4: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:92:in `require'
        3: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:92:in `require'
        2: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-6.0.3.4/lib/minitest/rails_plugin.rb:4:in `<top (required)>'
        1: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:92:in `require'
/Users/shisha/.rbenv/versions/2.7.1/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:92:in `require': cannot load such file -- rails/test_unit/reporter (LoadError)
        12: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/minitest-5.14.2/lib/minitest.rb:68:in `block in autorun'
        11: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/minitest-5.14.2/lib/minitest.rb:126:in `run'
        10: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/minitest-5.14.2/lib/minitest.rb:97:in `load_plugins'
         9: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/minitest-5.14.2/lib/minitest.rb:97:in `each'
         8: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/minitest-5.14.2/lib/minitest.rb:103:in `block in load_plugins'
         7: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:92:in `require'
         6: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:92:in `require'
         5: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-6.0.3.4/lib/minitest/rails_plugin.rb:4:in `<top (required)>'
         4: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:156:in `require'
         3: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:161:in `rescue in require'
         2: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/2.7.0/rubygems.rb:209:in `try_activate'
         1: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/2.7.0/rubygems/specification.rb:1371:in `activate'
/Users/shisha/.rbenv/versions/2.7.1/lib/ruby/2.7.0/rubygems/specification.rb:2243:in `raise_if_conflicts': Unable to activate railties-6.0.3.4, because activesupport-6.1.0 conflicts with activesupport (= 6.0.3.4) (Gem::ConflictError)
        13: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/minitest-5.14.2/lib/minitest.rb:68:in `block in autorun'
        12: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/minitest-5.14.2/lib/minitest.rb:126:in `run'
        11: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/minitest-5.14.2/lib/minitest.rb:97:in `load_plugins'
        10: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/minitest-5.14.2/lib/minitest.rb:97:in `each'
         9: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/minitest-5.14.2/lib/minitest.rb:103:in `block in load_plugins'
         8: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:92:in `require'
         7: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:92:in `require'
         6: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-6.0.3.4/lib/minitest/rails_plugin.rb:4:in `<top (required)>'
         5: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:156:in `require'
         4: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:161:in `rescue in require'
         3: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/2.7.0/rubygems.rb:208:in `try_activate'
         2: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/2.7.0/rubygems.rb:215:in `rescue in try_activate'
         1: from /Users/shisha/.rbenv/versions/2.7.1/lib/ruby/2.7.0/rubygems/specification.rb:1371:in `activate'
/Users/shisha/.rbenv/versions/2.7.1/lib/ruby/2.7.0/rubygems/specification.rb:2243:in `raise_if_conflicts': Unable to activate railties-6.0.3.4, because activesupport-6.1.0 conflicts with activesupport (= 6.0.3.4) (Gem::ConflictError)

このファイルを実行したディレクトリ自体は、Railsと関係ないはずなのにエラーにRailsと表示されて不思議な感じです。

Answer 1

https://laptrinhx.com/gem-conflicterrornitsuite-activesupport-2513391273/
なんか1回active_supportをアンインストールしたら、動きました