module Minitest

def self.load_plugins # :nodoc:
  return unless self.extensions.empty?
  seen = {}
  require "rubygems" unless defined? Gem
  Gem.find_files("minitest/*_plugin.rb").each do |plugin_path|
    name = File.basename plugin_path, "_plugin.rb"
    next if seen[name]
    seen[name] = true
    require plugin_path
    self.extensions << name
  end
end