shoulda-matchers: Rails 5.0.0, Get `undefined method `configure' for Shoulda::Matchers:Module' error.

Rails 5.0.0, config with following process:

1. Add following config to Gemfile

group :test do
  gem 'shoulda', '~> 3.5'
  gem 'shoulda-matchers'
end

1. run bundle install
2. Add following code to test/test_helper

Shoulda::Matchers.configure do |config|
  config.integrate do |with|
    with.test_framework :minitest
    with.library :rails
  end
end

1. Run rake test. Got

rake aborted!
NoMethodError: undefined method `configure' for Shoulda::Matchers:Module
/home/zw963/Xthink/ershou_web/test/test_helper.rb:20:in `<top (required)>'

Thanks