title: minitest_plugin.rb:9 getting wrong number of arguments
body: <pre><code>~/Sites/sample_app$ rails test
  Running via Spring preloader in process 24338
  Run options: --seed 58780
  
  Running:
  
  ..
  
  Finished in 0.292172s, 6.8453 runs/s, 6.8453 assertions/s.
  /var/lib/gems/2.3.0/gems/railties-5.1.0/lib/rails/test_unit/minitest_plugin.rb:9:in `aggregated_results': wrong number of arguments (given 1, expected 0) (ArgumentError)
  </code></pre>
  
  <p>I don't understand why I am getting this error. I Can't seem to find anyone with this specific error. I'm following the tutorial <a href="https://www.railstutorial.org/book/static_pages" rel="noreferrer">https://www.railstutorial.org/book/static_pages</a>. This error follows the rails test command. Running Ubuntu and rails 5.1 if that helps. I'm not passing any arguments so I don't understand why I am getting this error. </p>
  
  <p>My test file looks like : </p>
  
  <pre><code>    require 'test_helper'
  
      class StaticPagesControllerTest &lt; ActionDispatch::IntegrationTest
  
      test "should get home" do
        get static_pages_home_url
        assert_response :success
      end
  
      test "should get help" do
        get static_pages_help_url
        assert_response :success
      end
  </code></pre>