kernel_require.rb:55:in(1) sass-spec testsuite for Sass implementions

DESCRIPTION

,/usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require/.rb:55:in `require': cannot load such file -- minitest (LoadError)
from ,/usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require/.rb:55:in `require' from /tmp/buildd/sass-spec-0~20150516/lib/sass_spec/runner.rb:1:in `<top (required)>' from /tmp/buildd/sass-spec-0~20150516/lib/sass_spec.rb:4:in `require_relative' from /tmp/buildd/sass-spec-0~20150516/lib/sass_spec.rb:4:in `<top (required)>' from ./sass-spec:22:in `require_relative' from ./sass-spec:22:in `<main>'
from ,/usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require/.rb:55:in `require' from /tmp/buildd/sass-spec-0~20150516/lib/sass_spec/runner.rb:1:in `<top (required)>' from /tmp/buildd/sass-spec-0~20150516/lib/sass_spec.rb:4:in `require_relative' from /tmp/buildd/sass-spec-0~20150516/lib/sass_spec.rb:4:in `<top (required)>' from ./sass-spec:22:in `require_relative' from ./sass-spec:22:in `<main>'