Add a `bin/test` executable to use Rails 5 Minitest report.

.travis.yml

@@ -33,7 +33,7 @@ before_install: "rm ${BUNDLE_GEMFILE}.lock"
 
 before_script: "bundle update"
 
-script: "bundle exec rake test"
+script: "bin/test"
 
 notifications:
   email: false

bin/test

@@ -0,0 +1,13 @@
+#!/usr/bin/env ruby
+$: << File.expand_path(File.expand_path('../../test', __FILE__))
+
+require 'bundler/setup'
+begin
+  require 'rails/test_unit/minitest_plugin'
+rescue LoadError
+  exec 'rake'
+end
+
+Rails::TestUnitReporter.executable = 'bin/test'
+
+exit Minitest.run(ARGV)