diff --git a/core/modules/aggregator/tests/modules/aggregator_test/aggregator_test.routing.yml b/core/modules/aggregator/tests/modules/aggregator_test/aggregator_test.routing.yml
index 16a26be..fc40427 100644
--- a/core/modules/aggregator/tests/modules/aggregator_test/aggregator_test.routing.yml
+++ b/core/modules/aggregator/tests/modules/aggregator_test/aggregator_test.routing.yml
@@ -6,7 +6,7 @@ aggregator_test.feed:
     use_last_modified: FALSE
     use_etag: FALSE
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 aggregator_test.redirect:
   path: '/aggregator/redirect'
@@ -14,4 +14,4 @@ aggregator_test.redirect:
     _controller: '\Drupal\aggregator_test\Controller\AggregatorTestRssController::testRedirect'
     _title: 'Test feed with a redirect'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
diff --git a/core/modules/file/tests/file_module_test/file_module_test.routing.yml b/core/modules/file/tests/file_module_test/file_module_test.routing.yml
index 5238cc8..a045ecb 100644
--- a/core/modules/file/tests/file_module_test/file_module_test.routing.yml
+++ b/core/modules/file/tests/file_module_test/file_module_test.routing.yml
@@ -7,4 +7,4 @@ file_module_test.managed_test:
     multiple: FALSE
     default_fids: NULL
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
diff --git a/core/modules/file/tests/file_test/file_test.routing.yml b/core/modules/file/tests/file_test/file_test.routing.yml
index 9f9878f..cdbf08e 100644
--- a/core/modules/file/tests/file_test/file_test.routing.yml
+++ b/core/modules/file/tests/file_test/file_test.routing.yml
@@ -3,4 +3,4 @@ file.test:
   defaults:
     _form: 'Drupal\file_test\Form\FileTestForm'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
diff --git a/core/modules/system/tests/modules/common_test/common_test.routing.yml b/core/modules/system/tests/modules/common_test/common_test.routing.yml
index e02d5ce..2032a3b 100644
--- a/core/modules/system/tests/modules/common_test/common_test.routing.yml
+++ b/core/modules/system/tests/modules/common_test/common_test.routing.yml
@@ -10,7 +10,7 @@ common_test.destination:
   defaults:
     _controller: '\Drupal\common_test\Controller\CommonTestController::destination'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 common_test.js_and_css_querystring:
   path: '/common-test/query-string'
@@ -18,4 +18,4 @@ common_test.js_and_css_querystring:
     _title: 'Test querystring'
     _content: '\Drupal\common_test\Controller\CommonTestController::jsAndCssQuerystring'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
diff --git a/core/modules/system/tests/modules/menu_test/menu_test.routing.yml b/core/modules/system/tests/modules/menu_test/menu_test.routing.yml
index bc8a736..21a2d1e 100644
--- a/core/modules/system/tests/modules/menu_test/menu_test.routing.yml
+++ b/core/modules/system/tests/modules/menu_test/menu_test.routing.yml
@@ -12,7 +12,7 @@ menu_test.menu_callback_title:
     _title: 'Menu Callback Title'
     _content: '\Drupal\menu_test\Controller\MenuTestController::menuTestCallback'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 menu_test.login_callback:
   path: '/menu_login_callback'
@@ -26,7 +26,7 @@ menu_test.callback_description:
   defaults:
     _content: '\Drupal\system\Controller\SystemController::systemAdminMenuBlockPage'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 menu_test.callback_description_plain:
   path: '/menu_callback_description/description-plain'
@@ -34,7 +34,7 @@ menu_test.callback_description_plain:
     _title: 'Menu item with a regular description'
     _content: '\Drupal\menu_test\Controller\MenuTestController::menuTestCallback'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 menu_test.callback_description_callback:
   path: '/menu_callback_description/description-callback'
@@ -42,7 +42,7 @@ menu_test.callback_description_callback:
     _title: 'Menu item with a description set with a callback'
     _content: '\Drupal\menu_test\Controller\MenuTestController::menuTestCallback'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 menu_test.menu_no_title_callback:
   path: '/menu_no_title_callback'
@@ -50,7 +50,7 @@ menu_test.menu_no_title_callback:
     _title: 'A title with @placeholder'
     _content: '\Drupal\menu_test\Controller\MenuTestController::menuTestCallback'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 menu_test.router_test1:
   path: '/foo/{bar}'
@@ -213,7 +213,7 @@ menu_test.menu_test_maintain:
     _title: 'Menu maintain test'
     _content: '\Drupal\test_page_test\Controller\TestPageTestController::testPage'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 menu_test.hierarchy_parent:
   path: '/menu-test/hierarchy/parent'
@@ -221,7 +221,7 @@ menu_test.hierarchy_parent:
     _title: 'Parent menu router'
     _content: '\Drupal\test_page_test\Controller\TestPageTestController::testPage'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 menu_test.hierarchy_parent_child:
   path: '/menu-test/hierarchy/parent/child'
@@ -229,7 +229,7 @@ menu_test.hierarchy_parent_child:
     _title: 'Child menu router'
     _content: '\Drupal\test_page_test\Controller\TestPageTestController::testPage'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 menu_test.hierarchy_parent_child2:
   path: '/menu-test/hierarchy/parent/child2/child'
@@ -237,7 +237,7 @@ menu_test.hierarchy_parent_child2:
     _title: 'Unattached subchild router'
     _content: '\Drupal\test_page_test\Controller\TestPageTestController::testPage'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 menu_test.menu_test:
   path: '/menu-test'
@@ -245,7 +245,7 @@ menu_test.menu_test:
     _title: 'Menu test root'
     _content: '\Drupal\test_page_test\Controller\TestPageTestController::testPage'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 menu_test.hidden:
   path: '/menu-test/hidden'
@@ -253,7 +253,7 @@ menu_test.hidden:
     _title: 'Hidden test root'
     _content: '\Drupal\test_page_test\Controller\TestPageTestController::testPage'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 menu_test.hidden_menu:
   path: '/menu-test/hidden/menu'
@@ -261,7 +261,7 @@ menu_test.hidden_menu:
     _title: 'Menus'
     _content: '\Drupal\test_page_test\Controller\TestPageTestController::testPage'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 menu_test.hidden_menu_add:
   path: '/menu-test/hidden/menu/add'
@@ -269,7 +269,7 @@ menu_test.hidden_menu_add:
     _title: 'Add menu'
     _content: '\Drupal\test_page_test\Controller\TestPageTestController::testPage'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 menu_test.hidden_menu_settings:
   path: '/menu-test/hidden/menu/settings'
@@ -277,7 +277,7 @@ menu_test.hidden_menu_settings:
     _title: 'Settings'
     _content: '\Drupal\test_page_test\Controller\TestPageTestController::testPage'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 menu_test.hidden_manage:
   path: '/menu-test/hidden/menu/manage/{menu}'
@@ -285,7 +285,7 @@ menu_test.hidden_manage:
     _title: 'Customize menu'
     _content: '\Drupal\test_page_test\Controller\TestPageTestController::testPage'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 menu_test.hidden_manage_add:
   path: '/menu-test/hidden/menu/manage/{menu}/add'
@@ -293,7 +293,7 @@ menu_test.hidden_manage_add:
     _title: 'Add link'
     _content: '\Drupal\test_page_test\Controller\TestPageTestController::testPage'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 menu_test.hidden_manage_edit:
   path: '/menu-test/hidden/menu/manage/{menu}/edit'
@@ -301,7 +301,7 @@ menu_test.hidden_manage_edit:
     _title: 'Edit menu'
     _content: '\Drupal\test_page_test\Controller\TestPageTestController::testPage'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 menu_test.hidden_manage_delete:
   path: '/menu-test/hidden/menu/manage/{menu}/delete'
@@ -309,7 +309,7 @@ menu_test.hidden_manage_delete:
     _title: 'Delete menu'
     _content: '\Drupal\test_page_test\Controller\TestPageTestController::testPage'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 menu_test.hidden_block:
   path: '/menu-test/hidden/block'
@@ -317,7 +317,7 @@ menu_test.hidden_block:
     _title: 'Blocks'
     _content: '\Drupal\test_page_test\Controller\TestPageTestController::testPage'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 menu_test.hidden_block_add:
   path: '/menu-test/hidden/block/add'
@@ -325,7 +325,7 @@ menu_test.hidden_block_add:
     _title: 'Add block'
     _content: '\Drupal\test_page_test\Controller\TestPageTestController::testPage'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 menu_test.hidden_block_configure:
   path: '/menu-test/hidden/block/manage/{foo}/{bar}'
@@ -333,7 +333,7 @@ menu_test.hidden_block_configure:
     _title: 'Configure block'
     _content: '\Drupal\test_page_test\Controller\TestPageTestController::testPage'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 menu_test.hidden_block_delete:
   path: '/menu-test/hidden/block/manage/{foo}/{bar}/delete'
@@ -341,7 +341,7 @@ menu_test.hidden_block_delete:
     _title: 'Configure block'
     _content: '\Drupal\test_page_test\Controller\TestPageTestController::testPage'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 menu_test.breadcrumbs:
   path: '/menu-test/breadcrumb/tasks'
@@ -453,7 +453,7 @@ menu_test.custom_403:
     _title: 'Custom 403 page'
     _content: '\Drupal\menu_test\Controller\MenuTestController::custom403404'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 menu_test.custom_404:
   path: '/menu-test/custom-404-page'
@@ -461,7 +461,7 @@ menu_test.custom_404:
     _title: 'Custom 404 page'
     _content: '\Drupal\menu_test\Controller\MenuTestController::custom403404'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 menu_test.menu_trail:
   path: '/menu-test/menu-trail'
@@ -469,7 +469,7 @@ menu_test.menu_trail:
     _title: 'Menu trail - Case 1'
     _content: '\Drupal\menu_test\Controller\MenuTestController::menuTrail'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 menu_test.menu_trail_admin:
   path: '/admin/config/development/menu-trail'
@@ -485,7 +485,7 @@ menu_test.theme_callback:
     _title: 'Page that displays different themes'
     _content: '\Drupal\menu_test\Controller\MenuTestController::themePage'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 menu_test.no_theme_callback:
   path: '/menu-test/no-theme-callback'
@@ -494,7 +494,7 @@ menu_test.no_theme_callback:
     _content: '\Drupal\menu_test\Controller\MenuTestController::themePage'
     inherited: false
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 menu_test.exotic_path:
   # "Special" ASCII characters, characters that look like a percent-escaped
@@ -506,7 +506,7 @@ menu_test.exotic_path:
     _content: '\Drupal\menu_test\Controller\MenuTestController::menuTestCallback'
   requirements:
     exotic: '.+'
-    _permission: 'access content'
+    _access: 'TRUE'
 
 menu_test.theme_callback_inheritance:
   path: '/menu-test/theme-callback/{inherited}/inheritance'
@@ -514,7 +514,7 @@ menu_test.theme_callback_inheritance:
     _title: 'Page that tests theme negotiation inheritance.'
     _content: '\Drupal\menu_test\Controller\MenuTestController::themePage'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 menu_test.title_test_case1:
   path: '/menu-title-test/case1'
diff --git a/core/modules/system/tests/modules/module_test/module_test.routing.yml b/core/modules/system/tests/modules/module_test/module_test.routing.yml
index 450cf09..bcecaf4 100644
--- a/core/modules/system/tests/modules/module_test/module_test.routing.yml
+++ b/core/modules/system/tests/modules/module_test/module_test.routing.yml
@@ -4,7 +4,7 @@ module_test.dynamic_invoke:
     _title: 'Test hook dynamic loading (invoke)'
     _content: '\Drupal\module_test\Controller\ModuleTestController::hookDynamicLoadingInvoke'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 module_test.dynamic_invoke_all:
   path: '/module-test/hook-dynamic-loading-invoke-all'
@@ -12,7 +12,7 @@ module_test.dynamic_invoke_all:
     _title: 'Test hook dynamic loading (invoke_all)'
     _content: '\Drupal\module_test\Controller\ModuleTestController::hookDynamicLoadingInvokeAll'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 module_test.class_loading:
   path: '/module-test/class-loading'
diff --git a/core/modules/system/tests/modules/session_test/session_test.routing.yml b/core/modules/system/tests/modules/session_test/session_test.routing.yml
index 17eafeb..b1dc489 100644
--- a/core/modules/system/tests/modules/session_test/session_test.routing.yml
+++ b/core/modules/system/tests/modules/session_test/session_test.routing.yml
@@ -4,7 +4,7 @@ session_test.get:
     _title: 'Session value'
     _content: '\Drupal\session_test\Controller\SessionTestController::get'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 session_test.id:
   path: '/session-test/id'
@@ -12,7 +12,7 @@ session_test.id:
     _title: 'Session ID'
     _content: '\Drupal\session_test\Controller\SessionTestController::getId'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 session_test.id_from_cookie:
   path: '/session-test/id-from-cookie'
@@ -20,7 +20,7 @@ session_test.id_from_cookie:
     _title: 'Session ID from cookie'
     _content: '\Drupal\session_test\Controller\SessionTestController::getIdFromCookie'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 session_test.set:
   path: '/session-test/set/{test_value}'
@@ -31,7 +31,7 @@ session_test.set:
     converters:
       test_value: '\s+'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 session_test.no_set:
   path: '/session-test/no-set/{test_value}'
@@ -42,7 +42,7 @@ session_test.no_set:
     converters:
       test_value: '\s+'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 session_test.set_message:
   path: '/session-test/set-message'
@@ -50,7 +50,7 @@ session_test.set_message:
     _title: 'Set message'
     _content: '\Drupal\session_test\Controller\SessionTestController::setMessage'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 session_test.set_message_but_dont_save:
   path: '/session-test/set-message-but-dont-save'
@@ -58,7 +58,7 @@ session_test.set_message_but_dont_save:
     _title: 'Set message but do not save session'
     _content: '\Drupal\session_test\Controller\SessionTestController::setMessageButDontSave'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 session_test.set_not_started:
   path: '/session-test/set-not-started'
@@ -66,7 +66,7 @@ session_test.set_not_started:
     _title: 'Set message when session is not started'
     _content: '\Drupal\session_test\Controller\SessionTestController::setNotStarted'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 session_test.is_logged_in:
   path: '/session-test/is-logged-in'
diff --git a/core/modules/system/tests/modules/system_test/system_test.routing.yml b/core/modules/system/tests/modules/system_test/system_test.routing.yml
index 660cfce..643b85b 100644
--- a/core/modules/system/tests/modules/system_test/system_test.routing.yml
+++ b/core/modules/system/tests/modules/system_test/system_test.routing.yml
@@ -65,14 +65,14 @@ system_test.variable_get:
     _title: 'Variable Get'
     _content: '\Drupal\system_test\Controller\SystemTestController::variableGet'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 system_test.set_header:
   path: '/system-test/set-header'
   defaults:
     _content: '\Drupal\system_test\Controller\SystemTestController::setHeader'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 system_test.shutdown_functions:
   path: '/system-test/shutdown-functions/{arg1}/{arg2}'
diff --git a/core/modules/system/tests/modules/theme_test/theme_test.routing.yml b/core/modules/system/tests/modules/theme_test/theme_test.routing.yml
index 6b78b13..19f2b8c 100644
--- a/core/modules/system/tests/modules/theme_test/theme_test.routing.yml
+++ b/core/modules/system/tests/modules/theme_test/theme_test.routing.yml
@@ -5,7 +5,7 @@ theme_test.function_template_override:
   defaults:
     _content: '\Drupal\theme_test\ThemeTestController::functionTemplateOverridden'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 theme_test.info_stylesheets:
   path: '/theme-test/info/stylesheets'
@@ -63,32 +63,32 @@ suggestion_alter:
   defaults:
     _content: '\Drupal\theme_test\ThemeTestController::suggestionAlter'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 theme_test.general_suggestion_alter:
   path: '/theme-test/general-suggestion-alter'
   defaults:
     _content: '\Drupal\theme_test\ThemeTestController::generalSuggestionAlter'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 suggestion_provided:
   path: '/theme-test/suggestion-provided'
   defaults:
     _content: '\Drupal\theme_test\ThemeTestController::suggestionProvided'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 specific_suggestion_alter:
   path: '/theme-test/specific-suggestion-alter'
   defaults:
     _content: '\Drupal\theme_test\ThemeTestController::specificSuggestionAlter'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 function_suggestion_alter:
   path: '/theme-test/function-suggestion-alter'
   defaults:
     _content: '\Drupal\theme_test\ThemeTestController::functionSuggestionAlter'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
diff --git a/core/modules/system/tests/modules/twig_extension_test/twig_extension_test.routing.yml b/core/modules/system/tests/modules/twig_extension_test/twig_extension_test.routing.yml
index cda7369..0f30820 100644
--- a/core/modules/system/tests/modules/twig_extension_test/twig_extension_test.routing.yml
+++ b/core/modules/system/tests/modules/twig_extension_test/twig_extension_test.routing.yml
@@ -3,10 +3,10 @@ twig_extension_test.filter:
   defaults:
     _content: '\Drupal\twig_extension_test\TwigExtensionTestController::testFilterRender'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 twig_extension_test.function:
   path: '/twig-extension-test/function'
   defaults:
     _content: '\Drupal\twig_extension_test\TwigExtensionTestController::testFunctionRender'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
diff --git a/core/modules/system/tests/modules/twig_theme_test/twig_theme_test.routing.yml b/core/modules/system/tests/modules/twig_theme_test/twig_theme_test.routing.yml
index 07880fb..96befd4 100644
--- a/core/modules/system/tests/modules/twig_theme_test/twig_theme_test.routing.yml
+++ b/core/modules/system/tests/modules/twig_theme_test/twig_theme_test.routing.yml
@@ -3,11 +3,11 @@ twig_theme_test.php_variables:
   defaults:
     _content: '\Drupal\twig_theme_test\TwigThemeTestController::phpVariablesRender'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
 
 twig_theme_test.trans:
   path: '/twig-theme-test/trans'
   defaults:
     _content: '\Drupal\twig_theme_test\TwigThemeTestController::transBlockRender'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'
diff --git a/core/modules/system/tests/modules/url_alter_test/url_alter_test.routing.yml b/core/modules/system/tests/modules/url_alter_test/url_alter_test.routing.yml
index a92ebf6..c12c7cb 100644
--- a/core/modules/system/tests/modules/url_alter_test/url_alter_test.routing.yml
+++ b/core/modules/system/tests/modules/url_alter_test/url_alter_test.routing.yml
@@ -3,4 +3,4 @@ url_alter_test.foo:
   defaults:
     _content: '\Drupal\url_alter_test\Controller\URLAlterTestController::foo'
   requirements:
-    _permission: 'access content'
+    _access: 'TRUE'