diff --git a/core/modules/aggregator/src/Tests/AggregatorTestBase.php b/core/modules/aggregator/src/Tests/AggregatorTestBase.php
index 3c5a452..2ef399f 100644
--- a/core/modules/aggregator/src/Tests/AggregatorTestBase.php
+++ b/core/modules/aggregator/src/Tests/AggregatorTestBase.php
@@ -28,7 +28,7 @@
    *
    * @var array
    */
-  public static $modules = array('node', 'aggregator', 'aggregator_test', 'views');
+  public static $modules = ['block', 'node', 'aggregator', 'aggregator_test', 'views'];
 
   /**
    * {@inheritdoc}
@@ -43,6 +43,7 @@ protected function setUp() {
 
     $this->adminUser = $this->drupalCreateUser(array('access administration pages', 'administer news feeds', 'access news feeds', 'create article content'));
     $this->drupalLogin($this->adminUser);
+    $this->drupalPlaceBlock('system_page_tabs_block');
   }
 
   /**
diff --git a/core/modules/block/src/Tests/BlockHiddenRegionTest.php b/core/modules/block/src/Tests/BlockHiddenRegionTest.php
index b5abe7c..e8b53b5 100644
--- a/core/modules/block/src/Tests/BlockHiddenRegionTest.php
+++ b/core/modules/block/src/Tests/BlockHiddenRegionTest.php
@@ -42,6 +42,7 @@ protected function setUp() {
 
     $this->drupalLogin($this->adminUser);
     $this->drupalPlaceBlock('search_form_block');
+    $this->drupalPlaceBlock('system_page_tabs_block');
   }
 
   /**
diff --git a/core/modules/block/src/Tests/NonDefaultBlockAdminTest.php b/core/modules/block/src/Tests/NonDefaultBlockAdminTest.php
index 563d12d..07418e0 100644
--- a/core/modules/block/src/Tests/NonDefaultBlockAdminTest.php
+++ b/core/modules/block/src/Tests/NonDefaultBlockAdminTest.php
@@ -24,6 +24,15 @@ class NonDefaultBlockAdminTest extends WebTestBase {
   public static $modules = array('block');
 
   /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+
+    $this->drupalPlaceBlock('system_page_tabs_block');
+  }
+
+  /**
    * Test non-default theme admin.
    */
   function testNonDefaultBlockAdmin() {
diff --git a/core/modules/comment/src/Tests/CommentTestBase.php b/core/modules/comment/src/Tests/CommentTestBase.php
index 8ebc4e7..f181808 100644
--- a/core/modules/comment/src/Tests/CommentTestBase.php
+++ b/core/modules/comment/src/Tests/CommentTestBase.php
@@ -27,7 +27,7 @@
    *
    * @var array
    */
-  public static $modules = array('comment', 'node', 'history', 'field_ui', 'datetime');
+  public static $modules = ['block', 'comment', 'node', 'history', 'field_ui', 'datetime'];
 
   /**
    * An administrative user with permission to configure comment settings.
@@ -86,6 +86,7 @@ protected function setUp() {
 
     // Create a test node authored by the web user.
     $this->node = $this->drupalCreateNode(array('type' => 'article', 'promote' => 1, 'uid' => $this->webUser->id()));
+    $this->drupalPlaceBlock('system_page_tabs_block');
   }
 
   /**
diff --git a/core/modules/config/src/Tests/ConfigEntityListTest.php b/core/modules/config/src/Tests/ConfigEntityListTest.php
index 73571ce..406cd1e 100644
--- a/core/modules/config/src/Tests/ConfigEntityListTest.php
+++ b/core/modules/config/src/Tests/ConfigEntityListTest.php
@@ -23,7 +23,7 @@ class ConfigEntityListTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('config_test');
+  public static $modules = ['block', 'config_test'];
 
   /**
    * {@inheritdoc}
@@ -33,6 +33,7 @@ protected function setUp() {
     // Delete the override config_test entity since it is not required by this
     // test.
     \Drupal::entityManager()->getStorage('config_test')->load('override')->delete();
+    $this->drupalPlaceBlock('system_page_actions_block');
   }
 
   /**
diff --git a/core/modules/config_translation/src/Tests/ConfigTranslationListUiTest.php b/core/modules/config_translation/src/Tests/ConfigTranslationListUiTest.php
index 4ceec20..366e3bb 100644
--- a/core/modules/config_translation/src/Tests/ConfigTranslationListUiTest.php
+++ b/core/modules/config_translation/src/Tests/ConfigTranslationListUiTest.php
@@ -80,6 +80,7 @@ protected function setUp() {
     $this->config('locale.settings')
       ->set('translation.import_enabled', TRUE)
       ->save();
+    $this->drupalPlaceBlock('system_page_tabs_block');
   }
 
   /**
diff --git a/core/modules/config_translation/src/Tests/ConfigTranslationOverviewTest.php b/core/modules/config_translation/src/Tests/ConfigTranslationOverviewTest.php
index a2f6a6c..2a7553e 100644
--- a/core/modules/config_translation/src/Tests/ConfigTranslationOverviewTest.php
+++ b/core/modules/config_translation/src/Tests/ConfigTranslationOverviewTest.php
@@ -23,7 +23,7 @@ class ConfigTranslationOverviewTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('contact', 'config_translation', 'views', 'views_ui', 'contextual', 'config_test', 'config_translation_test');
+  public static $modules = ['block', 'contact', 'config_translation', 'views', 'views_ui', 'contextual', 'config_test', 'config_translation_test'];
 
   /**
    * Languages to enable.
@@ -58,6 +58,7 @@ protected function setUp() {
       ConfigurableLanguage::createFromLangcode($langcode)->save();
     }
     $this->localeStorage = $this->container->get('locale.storage');
+    $this->drupalPlaceBlock('system_page_tabs_block');
   }
 
   /**
diff --git a/core/modules/config_translation/src/Tests/ConfigTranslationUiTest.php b/core/modules/config_translation/src/Tests/ConfigTranslationUiTest.php
index c7218df..ecdffce 100644
--- a/core/modules/config_translation/src/Tests/ConfigTranslationUiTest.php
+++ b/core/modules/config_translation/src/Tests/ConfigTranslationUiTest.php
@@ -28,7 +28,7 @@ class ConfigTranslationUiTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'contact', 'contact_test', 'config_translation', 'config_translation_test', 'views', 'views_ui', 'contextual', 'filter', 'filter_test');
+  public static $modules = ['block', 'node', 'contact', 'contact_test', 'config_translation', 'config_translation_test', 'views', 'views_ui', 'contextual', 'filter', 'filter_test'];
 
   /**
    * Languages to enable.
@@ -100,6 +100,7 @@ protected function setUp() {
       ConfigurableLanguage::createFromLangcode($langcode)->save();
     }
     $this->localeStorage = $this->container->get('locale.storage');
+    $this->drupalPlaceBlock('system_page_tabs_block');
   }
 
   /**
diff --git a/core/modules/contact/src/Tests/ContactSitewideTest.php b/core/modules/contact/src/Tests/ContactSitewideTest.php
index c815d35..a8e5ecf 100644
--- a/core/modules/contact/src/Tests/ContactSitewideTest.php
+++ b/core/modules/contact/src/Tests/ContactSitewideTest.php
@@ -39,6 +39,7 @@ class ContactSitewideTest extends WebTestBase {
   protected function setUp() {
     parent::setUp();
     $this->drupalPlaceBlock('system_breadcrumb_block');
+    $this->drupalPlaceBlock('system_page_actions_block');
   }
 
   /**
diff --git a/core/modules/contact/src/Tests/ContactStorageTest.php b/core/modules/contact/src/Tests/ContactStorageTest.php
index 5d62e10..f18d10e 100644
--- a/core/modules/contact/src/Tests/ContactStorageTest.php
+++ b/core/modules/contact/src/Tests/ContactStorageTest.php
@@ -28,13 +28,14 @@ class ContactStorageTest extends ContactSitewideTest {
    *
    * @var array
    */
-  public static $modules = array(
+  public static $modules = [
+    'block',
     'text',
     'contact',
     'field_ui',
     'contact_storage_test',
     'contact_test',
-  );
+  ];
 
   /**
    * Tests configuration options and the site-wide contact form.
diff --git a/core/modules/filter/src/Tests/FilterAdminTest.php b/core/modules/filter/src/Tests/FilterAdminTest.php
index 112c486..a12cefe 100644
--- a/core/modules/filter/src/Tests/FilterAdminTest.php
+++ b/core/modules/filter/src/Tests/FilterAdminTest.php
@@ -22,7 +22,7 @@ class FilterAdminTest extends WebTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('filter', 'node');
+  public static $modules = ['block', 'filter', 'node'];
 
   /**
    * An user with administration permissions.
@@ -105,6 +105,7 @@ protected function setUp() {
     user_role_grant_permissions('authenticated', array($basic_html_format->getPermissionName()));
     user_role_grant_permissions('anonymous', array($restricted_html_format->getPermissionName()));
     $this->drupalLogin($this->adminUser);
+    $this->drupalPlaceBlock('system_page_actions_block');
   }
 
   /**
diff --git a/core/modules/filter/src/Tests/FilterFormatAccessTest.php b/core/modules/filter/src/Tests/FilterFormatAccessTest.php
index 32d5d04..aa45bbd 100644
--- a/core/modules/filter/src/Tests/FilterFormatAccessTest.php
+++ b/core/modules/filter/src/Tests/FilterFormatAccessTest.php
@@ -24,7 +24,7 @@ class FilterFormatAccessTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('filter', 'node');
+  public static $modules = ['block', 'filter', 'node'];
 
   /**
    * A user with administrative permissions.
@@ -114,6 +114,7 @@ protected function setUp() {
       $this->secondAllowedFormat->getPermissionName(),
       $this->disallowedFormat->getPermissionName(),
     ));
+    $this->drupalPlaceBlock('system_page_tabs_block');
   }
 
   /**
diff --git a/core/modules/language/src/Tests/LanguagePathMonolingualTest.php b/core/modules/language/src/Tests/LanguagePathMonolingualTest.php
index d3aa814..5e741c7 100644
--- a/core/modules/language/src/Tests/LanguagePathMonolingualTest.php
+++ b/core/modules/language/src/Tests/LanguagePathMonolingualTest.php
@@ -21,7 +21,7 @@ class LanguagePathMonolingualTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('language', 'path');
+  public static $modules = ['block', 'language', 'path'];
 
   protected function setUp() {
     parent::setUp();
@@ -56,6 +56,7 @@ protected function setUp() {
     // Set language detection to URL.
     $edit = array('language_interface[enabled][language-url]' => TRUE);
     $this->drupalPostForm('admin/config/regional/language/detection', $edit, t('Save settings'));
+    $this->drupalPlaceBlock('system_page_actions_block');
   }
 
   /**
diff --git a/core/modules/node/src/Tests/PageEditTest.php b/core/modules/node/src/Tests/PageEditTest.php
index 582ab6f..6ee5722 100644
--- a/core/modules/node/src/Tests/PageEditTest.php
+++ b/core/modules/node/src/Tests/PageEditTest.php
@@ -16,11 +16,19 @@ class PageEditTest extends NodeTestBase {
   protected $webUser;
   protected $adminUser;
 
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = ['block', 'node', 'datetime'];
+
   protected function setUp() {
     parent::setUp();
 
     $this->webUser = $this->drupalCreateUser(array('edit own page content', 'create page content'));
     $this->adminUser = $this->drupalCreateUser(array('bypass node access', 'administer nodes'));
+    $this->drupalPlaceBlock('system_page_tabs_block');
   }
 
   /**
diff --git a/core/modules/search/src/Tests/SearchConfigSettingsFormTest.php b/core/modules/search/src/Tests/SearchConfigSettingsFormTest.php
index a99ea45..273673e 100644
--- a/core/modules/search/src/Tests/SearchConfigSettingsFormTest.php
+++ b/core/modules/search/src/Tests/SearchConfigSettingsFormTest.php
@@ -58,6 +58,7 @@ protected function setUp() {
 
     // Enable the search block.
     $this->drupalPlaceBlock('search_form_block');
+    $this->drupalPlaceBlock('system_page_tabs_block');
   }
 
   /**
diff --git a/core/modules/search/src/Tests/SearchPageTextTest.php b/core/modules/search/src/Tests/SearchPageTextTest.php
index 4614baf..5d0f8ed 100644
--- a/core/modules/search/src/Tests/SearchPageTextTest.php
+++ b/core/modules/search/src/Tests/SearchPageTextTest.php
@@ -23,11 +23,19 @@ class SearchPageTextTest extends SearchTestBase {
    */
   protected $searchingUser;
 
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = ['block', 'node', 'search', 'dblog'];
+
   protected function setUp() {
     parent::setUp();
 
     // Create user.
     $this->searchingUser = $this->drupalCreateUser(array('search content', 'access user profiles', 'use advanced search'));
+    $this->drupalPlaceBlock('system_page_tabs_block');
   }
 
   /**
diff --git a/core/modules/system/src/Tests/Menu/MenuRouterTest.php b/core/modules/system/src/Tests/Menu/MenuRouterTest.php
index d75bd6c..f54bd11 100644
--- a/core/modules/system/src/Tests/Menu/MenuRouterTest.php
+++ b/core/modules/system/src/Tests/Menu/MenuRouterTest.php
@@ -43,6 +43,7 @@ protected function setUp() {
     parent::setUp();
 
     $this->drupalPlaceBlock('system_menu_block:tools');
+    $this->drupalPlaceBlock('system_page_tabs_block');
   }
 
   /**
diff --git a/core/modules/system/src/Tests/Menu/MenuTranslateTest.php b/core/modules/system/src/Tests/Menu/MenuTranslateTest.php
index e316c95..f4e158a 100644
--- a/core/modules/system/src/Tests/Menu/MenuTranslateTest.php
+++ b/core/modules/system/src/Tests/Menu/MenuTranslateTest.php
@@ -23,7 +23,16 @@ class MenuTranslateTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('menu_test');
+  public static $modules = ['block', 'menu_test'];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+
+    $this->drupalPlaceBlock('system_page_tabs_block');
+  }
 
   /**
    * Tests _menu_translate().
diff --git a/core/modules/system/src/Tests/System/DateTimeTest.php b/core/modules/system/src/Tests/System/DateTimeTest.php
index 9f0b0ac..f01200b 100644
--- a/core/modules/system/src/Tests/System/DateTimeTest.php
+++ b/core/modules/system/src/Tests/System/DateTimeTest.php
@@ -22,13 +22,14 @@ class DateTimeTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'language');
+  public static $modules = ['block', 'node', 'language'];
 
   protected function setUp() {
     parent::setUp();
 
     // Create admin user and log in admin user.
     $this->drupalLogin ($this->drupalCreateUser(array('administer site configuration')));
+    $this->drupalPlaceBlock('system_page_actions_block');
   }
 
   /**
diff --git a/core/modules/system/src/Tests/System/ThemeTest.php b/core/modules/system/src/Tests/System/ThemeTest.php
index d5bb6f6..48710cb 100644
--- a/core/modules/system/src/Tests/System/ThemeTest.php
+++ b/core/modules/system/src/Tests/System/ThemeTest.php
@@ -30,7 +30,7 @@ class ThemeTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'block', 'file');
+  public static $modules = ['node', 'block', 'file'];
 
   protected function setUp() {
     parent::setUp();
@@ -40,6 +40,7 @@ protected function setUp() {
     $this->adminUser = $this->drupalCreateUser(array('access administration pages', 'view the administration theme', 'administer themes', 'bypass node access', 'administer blocks'));
     $this->drupalLogin($this->adminUser);
     $this->node = $this->drupalCreateNode();
+    $this->drupalPlaceBlock('system_page_tabs_block');
   }
 
   /**
diff --git a/core/modules/taxonomy/src/Tests/VocabularyUiTest.php b/core/modules/taxonomy/src/Tests/VocabularyUiTest.php
index 3a34c2e..791d168 100644
--- a/core/modules/taxonomy/src/Tests/VocabularyUiTest.php
+++ b/core/modules/taxonomy/src/Tests/VocabularyUiTest.php
@@ -29,6 +29,7 @@ protected function setUp() {
     parent::setUp();
     $this->drupalLogin($this->drupalCreateUser(['administer taxonomy']));
     $this->vocabulary = $this->createVocabulary();
+    $this->drupalPlaceBlock('system_page_actions_block');
   }
 
   /**
diff --git a/core/modules/tracker/src/Tests/TrackerTest.php b/core/modules/tracker/src/Tests/TrackerTest.php
index 5c256d5..0593622 100644
--- a/core/modules/tracker/src/Tests/TrackerTest.php
+++ b/core/modules/tracker/src/Tests/TrackerTest.php
@@ -55,6 +55,7 @@ protected function setUp() {
     $this->otherUser = $this->drupalCreateUser($permissions);
     $this->addDefaultCommentField('node', 'page');
     $this->drupalPlaceBlock('system_page_tabs_block');
+    $this->drupalPlaceBlock('system_page_actions_block');
   }
 
   /**
diff --git a/core/modules/update/src/Tests/UpdateCoreTest.php b/core/modules/update/src/Tests/UpdateCoreTest.php
index 3aa598a..fdbf735 100644
--- a/core/modules/update/src/Tests/UpdateCoreTest.php
+++ b/core/modules/update/src/Tests/UpdateCoreTest.php
@@ -22,12 +22,13 @@ class UpdateCoreTest extends UpdateTestBase {
    *
    * @var array
    */
-  public static $modules = array('update_test', 'update', 'language');
+  public static $modules = ['update_test', 'update', 'language', 'block'];
 
   protected function setUp() {
     parent::setUp();
     $admin_user = $this->drupalCreateUser(array('administer site configuration', 'administer modules', 'administer themes'));
     $this->drupalLogin($admin_user);
+    $this->drupalPlaceBlock('system_page_actions_block');
   }
 
   /**
diff --git a/core/modules/user/src/Tests/UserRoleAdminTest.php b/core/modules/user/src/Tests/UserRoleAdminTest.php
index c19130c..f65897e 100644
--- a/core/modules/user/src/Tests/UserRoleAdminTest.php
+++ b/core/modules/user/src/Tests/UserRoleAdminTest.php
@@ -25,9 +25,17 @@ class UserRoleAdminTest extends WebTestBase {
    */
   protected $adminUser;
 
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = ['block'];
+
   protected function setUp() {
     parent::setUp();
     $this->adminUser = $this->drupalCreateUser(array('administer permissions', 'administer users'));
+    $this->drupalPlaceBlock('system_page_tabs_block');
   }
 
   /**
diff --git a/core/modules/views_ui/src/Tests/SettingsTest.php b/core/modules/views_ui/src/Tests/SettingsTest.php
index 262fc7a..523288c 100644
--- a/core/modules/views_ui/src/Tests/SettingsTest.php
+++ b/core/modules/views_ui/src/Tests/SettingsTest.php
@@ -22,6 +22,14 @@ class SettingsTest extends UITestBase {
   protected $adminUser;
 
   /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+    $this->drupalPlaceBlock('system_page_tabs_block');
+  }
+
+  /**
    * Tests the settings for the edit ui.
    */
   function testEditUI() {