rails tutorial 4章テストに失敗してしまう

HTMLの記述のみですが、
testを実行すると以下の様に失敗してしまいます。

ubuntu:~/environment/sample_app (rails-flavored-ruby) $ rails test
Running via Spring preloader in process 9215
Started with run options --seed 39178

 FAIL["test_should_get_about", #<Minitest::Reporters::Suite:0x00005584bd8c6b48 @name="StaticPagesControllerTest">, 1.0102913549999357]
 test_should_get_about#StaticPagesControllerTest (1.01s)
        <About | Ruby on Rails Tutorial Sample App> expected but was
        <About|Ruby on Rails Tutorial Sample App>..
        Expected 0 to be >= 1.
        test/controllers/static_pages_controller_test.rb:20:in `block in <class:StaticPagesControllerTest>'

 FAIL["test_should_get_contact", #<Minitest::Reporters::Suite:0x00005584bd93fde0 @name="StaticPagesControllerTest">, 1.0231368189997738]
 test_should_get_contact#StaticPagesControllerTest (1.02s)
        <Contact | Ruby on Rails Tutorial Sample App> expected but was
        <Contact|Ruby on Rails Tutorial Sample App>..
        Expected 0 to be >= 1.
        test/controllers/static_pages_controller_test.rb:26:in `block in <class:StaticPagesControllerTest>'

 FAIL["test_should_get_help", #<Minitest::Reporters::Suite:0x00005584bd9be0a0 @name="StaticPagesControllerTest">, 1.0346855889993094]
 test_should_get_help#StaticPagesControllerTest (1.04s)
        <Help | Ruby on Rails Tutorial Sample App> expected but was
        <Help|Ruby on Rails Tutorial Sample App>..
        Expected 0 to be >= 1.
        test/controllers/static_pages_controller_test.rb:14:in `block in <class:StaticPagesControllerTest>'

 FAIL["test_should_get_home", #<Minitest::Reporters::Suite:0x00005584bda67768 @name="StaticPagesControllerTest">, 1.0463882349995401]
 test_should_get_home#StaticPagesControllerTest (1.05s)
        <Home | Ruby on Rails Tutorial Sample App> expected but was
        <Home|Ruby on Rails Tutorial Sample App>..
        Expected 0 to be >= 1.
        test/controllers/static_pages_controller_test.rb:8:in `block in <class:StaticPagesControllerTest>'

  4/4: [==================================================================================================================] 100% Time: 00:00:01, Time: 00:00:01

Finished in 1.05075s
4 tests, 8 assertions, 4 failures, 0 errors, 0 skips

テストファイル、helper、erbファイル、ルーティンングは以下の様に記述しています。

テストコード

require 'test_helper'

class StaticPagesControllerTest < ActionDispatch::IntegrationTest
  
  test "should get home" do
    get static_pages_home_url
    assert_response :success
    assert_select "title", "Home | Ruby on Rails Tutorial Sample App"
  end

  test "should get help" do
    get static_pages_help_url
    assert_response :success
    assert_select "title", "Help | Ruby on Rails Tutorial Sample App"
  end
  
  test "should get about" do
    get static_pages_about_url
    assert_response :success
    assert_select "title", "About | Ruby on Rails Tutorial Sample App"
  end 
  
    test "should get contact" do
    get static_pages_contact_url
    assert_response :success
    assert_select "title", "Contact | Ruby on Rails Tutorial Sample App"
  end
  

end

共通テンプレerbファイル

<html>
  <head>
    <title><%= full_title(yield(:title)) %></title>
    <%= csrf_meta_tags %>
    <%= csp_meta_tag %>
    <%= stylesheet_link_tag    'application', media: 'all',
                               'data-turbolinks-track': 'reload' %>
    <%= javascript_pack_tag 'application',
                               'data-turbolinks-track': 'reload' %>
  </head>
  <body>
    <%= yield %>
  </body>
</html>

helper.rb

module ApplicationHelper
  
  def full_title(page_title='')
    base_title = "Ruby on Rails Tutorial Sample App"
    if page_title.empty?
      base_title
    else
      page_title + "|" + base_title
    end
  end
end

ルーティング

Rails.application.routes.draw do
  root 'static_pages#home'
  get 'static_pages/home'
  get 'static_pages/help'
  get 'static_pages/about'
  get 'static_pages/contact'
  # For details on the DSL available within this file, see https://guides.rubyonrails.org/routing.html
  
end

試したこと

<Home | Ruby on Rails Tutorial Sample App> expected but was
<Home|Ruby on Rails Tutorial Sample App>..
とのことで、試しに以下の様に|の前後で半角スペースを消す様に記述してみました。

test "should get home" do
    略
    assert_select "title", "Home|Ruby on Rails Tutorial Sample App"
  end

しかし、

FAIL["test_should_get_home", #<Minitest::Reporters::Suite:0x00005584ba1984f0 @name="StaticPagesControllerTest">, 1.0933848129998296]
 test_should_get_home#StaticPagesControllerTest (1.09s)
        <Home|Ruby on Rails Tutorial Sample App> expected but was
        <Home|Ruby on Rails Tutorial Sample App>..
Expected 0 to be >= 1.
        test/controllers/static_pages_controller_test.rb:8:in `block in <class:StaticPagesControllerTest>'

とのことでした。expect通りでいいじゃないかと思いましたが、全然違う様です。

失敗の原因が分かる方いらっしゃいましたら、お助けください。