[DRE-maint] Bug#744081: FTBFS: minitest/unit.rb:28:in const_missing: uninitialized constant MiniTest::Test (NameError)

[Christian Hofstaedtler]

Source: ruby-escape-utils
Version: 1.0.1-1
Severity: serious
Justification: fails to build from source

Dear Maintainer,

your package is failing to build on the buildds:

/bin/mkdir -p . ./.gem.20140409-24791-u8yi50/escape_utils
exit > .RUBYARCHDIR.-.escape_utils.time
/usr/bin/install -c -m 0755 escape_utils.so ./.gem.20140409-24791-u8yi50/escape_utils
make[1]: Leaving directory `/«PKGBUILDDIR»/ext/escape_utils'
Running tests for ruby2.0 using debian/ruby-tests.rb...
/usr/lib/ruby/2.0.0/minitest/unit.rb:28:in `const_missing': uninitialized constant MiniTest::Test (NameError)
                                           from /«PKGBUILDDIR»/test/html_safety_test.rb:29:in `<top (required)>'
                                           from /usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
                                           from /usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
                                           from debian/ruby-tests.rb:1:in `block in <main>'
                                           from debian/ruby-tests.rb:1:in `each'
                                           from debian/ruby-tests.rb:1:in `<main>'
ERROR: Test "ruby2.0" failed. Exiting.
dh_auto_install: dh_ruby --install /«PKGBUILDDIR»/debian/ruby-escape-utils returned exit code 1
make: *** [binary-arch] Error 1


This happened on all archs that managed to attempt a build so far, see:
  https://buildd.debian.org/status/package.php?p=ruby-escape-utils

  -ch