Why are my integration tests running twice?

home_integration_test.rb

require 'minitest_helper'

describe "Home integration" do  
  it "has content" do
    visit root_path
    assert page.has_content?("Be the first to know")
  end
  
  it "is possible to log in and log out" do
    provider = create(:provider)
    visit new_provider_session_path
    fill_in('Email', :with => provider.email)
    fill_in('Password', :with => 'secret')
    click_button('Sign in')
    assert page.has_content?("Dashboard")
    click_link('Sign out')
    assert page.has_content?("Signed out successfully.")
  end
end

minitest_helper.rb

ENV["RAILS_ENV"] = "test"
require File.expand_path('../../config/environment', __FILE__)

require "minitest/autorun"
require "minitest/rails"
require "factory_girl"
require "minitest/rails/capybara"
require "minitest/pride"
require 'turn'
require "active_support/testing/setup_and_teardown"

class MiniTest::Rails::ActiveSupport::TestCase
  include FactoryGirl::Syntax::Methods
  # Add more helper methods to be used by all tests here...
end

MiniTest::Rails.override_testunit!

DatabaseCleaner.strategy = :truncation
# Turn.config.format = :outline

class IntegrationTest < MiniTest::Rails::ActiveSupport::TestCase
  include Capybara::DSL
  include Rails.application.routes.url_helpers
  
  after do
    DatabaseCleaner.clean       # Truncate the database
    Capybara.reset_sessions!    # Forget the (simulated) browser state
    Capybara.use_default_driver # Revert Capybara.current_driver to Capybara.default_driver
  end
  register_spec_type(/integration$/, self)
end