minitest-rails and capybara working like a charm

Gemfile

# you should use this branch until related pull request has been accepted
# https://github.com/blowmage/minitest-rails/pull/19
group :development, :test do
  gem 'minitest-rails', git: "git@github.com:rawongithub/minitest-rails.git", branch: "gemspec"
end

group :test do
  gem 'capybara'
  gem 'capybara_minitest_spec'
  gem 'turn'
end

minitest_helper.rb

# this file is generated by: rails g mini_test:install

(...)

ENV["RAILS_ENV"] = "test"
require File.expand_path('../../config/environment', __FILE__)
require 'capybara/rails' #!!!should be placed after requiring environment file

(...)