Warning: you should require 'minitest/autorun' instead.
Warning: or add 'gem "minitest"' before 'require "minitest/autorun"'
From:
C:/projects/windows-pr/test/helper.rb:1:in `require'
C:/projects/windows-pr/test/helper.rb:1:in `<top (required)>'
C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/rake-11.2.2/lib/rake/rake_test_loader.rb:15:in `require'
C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/rake-11.2.2/lib/rake/rake_test_loader.rb:15:in `block in <main>'
C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/rake-11.2.2/lib/rake/rake_test_loader.rb:4:in `select'
C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/rake-11.2.2/lib/rake/rake_test_loader.rb:4:in `<main>'
MiniTest::Unit::TestCase is now Minitest::Test. From C:/projects/windows-pr/test/tc_clipboard.rb:9:in `<top (required)>'
...
(snip)
...
MiniTest::Unit::TestCase is now Minitest::Test. From C:/projects/windows-pr/test/tc_wsa.rb:9:in `<top (required)>'
Appveyor CI complains the following warnings:
We should suppress them.