use Coveralls.merged!('rails')

spec/spec_helper.rb

@@ -1,3 +1,6 @@
+require 'coveralls'
+Coveralls.merged!('rails')
+
 # This file was generated by the `rails generate rspec:install` command. Conventionally, all
 # specs live under a `spec` directory, which RSpec adds to the `$LOAD_PATH`.
 # The generated `.rspec` file contains `--require spec_helper` which will cause
@@ -40,9 +43,6 @@ RSpec.configure do |config|
     mocks.verify_partial_doubles = true
   end
 
-require 'coveralls'
-Coveralls.wear!
-
 # The settings below are suggested to provide a good initial experience
 # with RSpec, but feel free to customize to your heart's content.
 =begin

test/test_helper.rb

@@ -1,3 +1,6 @@
+require 'coveralls'
+Coveralls.merged!('rails')
+
 require 'simplecov'
 SimpleCov.start 'rails'
 
@@ -6,9 +9,6 @@ require File.expand_path('../../config/environment', __FILE__)
 require 'rails/test_help'
 require 'capybara/rails'
 
-require 'coveralls'
-Coveralls.wear!
-
 class ActiveSupport::TestCase
   # Setup all fixtures in test/fixtures/*.yml for all tests in alphabetical order.
   # fixtures :all