diff --git a/core/includes/menu.inc b/core/includes/menu.inc
index 56566e1..9dbbc20 100644
--- a/core/includes/menu.inc
+++ b/core/includes/menu.inc
@@ -93,7 +93,7 @@ function menu_list_system_menus() {
 }
 
 /**
- * Collects the local tasks (tabs), action links, and the root path.
+ * Collects the local tasks (tabs) for the current route.
  *
  * @param int $level
  *   The level of tasks you ask for. Primary tasks are 0, secondary are 1.
@@ -101,96 +101,46 @@ function menu_list_system_menus() {
  * @return array
  *   An array containing
  *   - tabs: Local tasks for the requested level.
- *   - actions: Action links for the requested level.
- *   - root_path: The router path for the current page. If the current page is
- *     a default local task, then this corresponds to the parent tab.
+ *   - route_name: The route name for the current page used to collect the local
+ *     tasks.
  *
- * @see hook_menu_local_tasks()
  * @see hook_menu_local_tasks_alter()
+ *
+ * @deprecated in Drupal 8.0.0, will be removed before Drupal 9.0.0.
  */
 function menu_local_tasks($level = 0) {
-  $data = &drupal_static(__FUNCTION__);
-  $root_path = &drupal_static(__FUNCTION__ . ':root_path', '');
-  $empty = array(
-    'tabs' => array(),
-    'actions' => array(),
-    'root_path' => &$root_path,
-  );
-
-  if (!isset($data)) {
-    // Look for route-based tabs.
-    $data['tabs'] = array();
-    $data['actions'] = array();
-
-    $route_name = \Drupal::routeMatch()->getRouteName();
-    if (!\Drupal::request()->attributes->has('exception') && !empty($route_name)) {
-      $manager = \Drupal::service('plugin.manager.menu.local_task');
-      $local_tasks = $manager->getTasksBuild($route_name);
-      foreach ($local_tasks as $level => $items) {
-        $data['tabs'][$level] = empty($data['tabs'][$level]) ? $items : array_merge($data['tabs'][$level], $items);
-      }
-    }
-
-    // Allow modules to dynamically add further tasks.
-    $module_handler = \Drupal::moduleHandler();
-    foreach ($module_handler->getImplementations('menu_local_tasks') as $module) {
-      $function = $module . '_menu_local_tasks';
-      $function($data, $route_name);
-    }
-    // Allow modules to alter local tasks.
-    $module_handler->alter('menu_local_tasks', $data, $route_name);
-  }
-
-  if (isset($data['tabs'][$level])) {
-    return array(
-      'tabs' => $data['tabs'][$level],
-      'actions' => $data['actions'],
-      'root_path' => $root_path,
-    );
-  }
-  elseif (!empty($data['actions'])) {
-    return array('actions' => $data['actions']) + $empty;
-  }
-  return $empty;
+  /** @var \Drupal\Core\Menu\LocalTaskManagerInterface $manager */
+  $manager = \Drupal::service('plugin.manager.menu.local_task');
+  return $manager->getLocalTasks(\Drupal::routeMatch()->getRouteName(), $level);
 }
 
 /**
  * Returns the rendered local tasks at the top level.
+ *
+ * @deprecated in Drupal 8.0.0, will be removed before Drupal 9.0.0.
  */
 function menu_primary_local_tasks() {
-  $links = menu_local_tasks(0);
+  /** @var \Drupal\Core\Menu\LocalTaskManagerInterface $manager */
+  $manager = \Drupal::service('plugin.manager.menu.local_task');
+  $links = $manager->getLocalTasks(\Drupal::routeMatch()->getRouteName(), 0);
   // Do not display single tabs.
   return count(Element::getVisibleChildren($links['tabs'])) > 1 ? $links['tabs'] : '';
 }
 
 /**
  * Returns the rendered local tasks at the second level.
+ *
+ * @deprecated in Drupal 8.0.0, will be removed before Drupal 9.0.0.
  */
 function menu_secondary_local_tasks() {
-  $links = menu_local_tasks(1);
+  /** @var \Drupal\Core\Menu\LocalTaskManagerInterface $manager */
+  $manager = \Drupal::service('plugin.manager.menu.local_task');
+  $links = $manager->getLocalTasks(\Drupal::routeMatch()->getRouteName(), 1);
   // Do not display single tabs.
   return count(Element::getVisibleChildren($links['tabs'])) > 1 ? $links['tabs'] : '';
 }
 
 /**
- * Returns the rendered local actions at the current level.
- */
-function menu_get_local_actions() {
-  $links = menu_local_tasks();
-  $route_name = Drupal::routeMatch()->getRouteName();
-  $manager = \Drupal::service('plugin.manager.menu.local_action');
-  return $manager->getActionsForRoute($route_name) + $links['actions'];
-}
-
-/**
- * Returns the router path, or the path for a default local task's parent.
- */
-function menu_tab_root_path() {
-  $links = menu_local_tasks();
-  return $links['root_path'];
-}
-
-/**
  * Returns a renderable element for the primary and secondary tabs.
  */
 function menu_local_tabs() {
diff --git a/core/includes/theme.inc b/core/includes/theme.inc
index b3deb32..329ff58 100644
--- a/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -1322,14 +1322,6 @@ function template_preprocess_page(&$variables) {
     $variables['is_front'] = FALSE;
     $variables['db_is_active'] = FALSE;
   }
-  if (!defined('MAINTENANCE_MODE')) {
-    $variables['action_links']   = menu_get_local_actions();
-    $variables['tabs']           = menu_local_tabs();
-  }
-  else {
-    $variables['action_links']   = array();
-    $variables['tabs']           = array();
-  }
 
   if ($node = \Drupal::routeMatch()->getParameter('node')) {
     $variables['node'] = $node;
diff --git a/core/lib/Drupal/Core/Menu/LocalActionManager.php b/core/lib/Drupal/Core/Menu/LocalActionManager.php
index c387b15..eb1e2d0 100644
--- a/core/lib/Drupal/Core/Menu/LocalActionManager.php
+++ b/core/lib/Drupal/Core/Menu/LocalActionManager.php
@@ -191,10 +191,11 @@ public function getActionsForRoute($route_appears) {
           'url' => Url::fromRoute($route_name, $route_parameters),
           'localized_options' => $plugin->getOptions($this->routeMatch),
         ),
-        '#access' => $this->accessManager->checkNamedRoute($route_name, $route_parameters, $this->account),
+        '#access' => $this->accessManager->checkNamedRoute($route_name, $route_parameters, $this->account, TRUE),
         '#weight' => $plugin->getWeight(),
       );
     }
+
     return $links;
   }
 
diff --git a/core/lib/Drupal/Core/Menu/LocalTaskManager.php b/core/lib/Drupal/Core/Menu/LocalTaskManager.php
index 5b12ac8..7055628 100644
--- a/core/lib/Drupal/Core/Menu/LocalTaskManager.php
+++ b/core/lib/Drupal/Core/Menu/LocalTaskManager.php
@@ -82,6 +82,13 @@ class LocalTaskManager extends DefaultPluginManager implements LocalTaskManagerI
   protected $instances = array();
 
   /**
+   * The local task render arrays for the current route.
+   *
+   * @var array
+   */
+  protected $taskData;
+
+  /**
    * The route provider to load routes by name.
    *
    * @var \Drupal\Core\Routing\RouteProviderInterface
@@ -296,41 +303,76 @@ public function getTasksBuild($current_route_name) {
     // of SQL queries that would otherwise be triggered by the access manager.
     $routes = $route_names ? $this->routeProvider->getRoutesByNames($route_names) : array();
 
+    // @todo add cacheability data in https://www.drupal.org/node/2511516 so
+    // that we are not re-building inaccessible links on every page request.
     foreach ($tree as $level => $instances) {
       /** @var $instances \Drupal\Core\Menu\LocalTaskInterface[] */
       foreach ($instances as $plugin_id => $child) {
         $route_name = $child->getRouteName();
         $route_parameters = $child->getRouteParameters($this->routeMatch);
 
-        // Find out whether the user has access to the task.
-        $access = $this->accessManager->checkNamedRoute($route_name, $route_parameters, $this->account);
-        if ($access) {
-          $active = $this->isRouteActive($current_route_name, $route_name, $route_parameters);
-
-          // The plugin may have been set active in getLocalTasksForRoute() if
-          // one of its child tabs is the active tab.
-          $active = $active || $child->getActive();
-          // @todo It might make sense to use link render elements instead.
-
-          $link = array(
-            'title' => $this->getTitle($child),
-            'url' => Url::fromRoute($route_name, $route_parameters),
-            'localized_options' => $child->getOptions($this->routeMatch),
-          );
-          $build[$level][$plugin_id] = array(
-            '#theme' => 'menu_local_task',
-            '#link' => $link,
-            '#active' => $active,
-            '#weight' => $child->getWeight(),
-            '#access' => $access,
-          );
-        }
+        $active = $this->isRouteActive($current_route_name, $route_name, $route_parameters);
+
+        // The plugin may have been set active in getLocalTasksForRoute() if
+        // one of its child tabs is the active tab.
+        $active = $active || $child->getActive();
+        // @todo It might make sense to use link render elements instead.
+
+        $link = [
+          'title' => $this->getTitle($child),
+          'url' => Url::fromRoute($route_name, $route_parameters),
+          'localized_options' => $child->getOptions($this->routeMatch),
+        ];
+        $build[$level][$plugin_id] = [
+          '#theme' => 'menu_local_task',
+          '#link' => $link,
+          '#active' => $active,
+          '#weight' => $child->getWeight(),
+          '#access' => $this->accessManager->checkNamedRoute($route_name, $route_parameters, $this->account, TRUE),
+        ];
       }
     }
+
     return $build;
   }
 
   /**
+   * {@inheritdoc}
+   */
+  public function getLocalTasks($route_name, $level = 0) {
+    if (!isset($this->taskData[$route_name])) {
+      // Look for route-based tabs.
+      $this->taskData[$route_name] = [
+        'tabs' => [],
+      ];
+
+      if (!$this->requestStack->getCurrentRequest()->attributes->has('exception')) {
+        // Safe to build tasks only when no exceptions raised.
+        $data = [];
+        $local_tasks = $this->getTasksBuild($route_name);
+        foreach ($local_tasks as $tab_level => $items) {
+          $data[$tab_level] = empty($data[$tab_level]) ? $items : array_merge($data[$tab_level], $items);
+        }
+        $this->taskData[$route_name]['tabs'] = $data;
+        // Allow modules to alter local tasks.
+        $this->moduleHandler->alter('menu_local_tasks', $this->taskData[$route_name], $route_name);
+      }
+    }
+
+    if (isset($this->taskData[$route_name]['tabs'][$level])) {
+      return [
+        'tabs' => $this->taskData[$route_name]['tabs'][$level],
+        'route_name' => $route_name,
+      ];
+    }
+
+    return [
+      'tabs' => [],
+      'route_name' => $route_name,
+    ];
+  }
+
+  /**
    * Determines whether the route of a certain local task is currently active.
    *
    * @param string $current_route_name
diff --git a/core/lib/Drupal/Core/Menu/LocalTaskManagerInterface.php b/core/lib/Drupal/Core/Menu/LocalTaskManagerInterface.php
index e75307d..1f8d3d2 100644
--- a/core/lib/Drupal/Core/Menu/LocalTaskManagerInterface.php
+++ b/core/lib/Drupal/Core/Menu/LocalTaskManagerInterface.php
@@ -53,4 +53,22 @@ public function getLocalTasksForRoute($route_name);
    */
   public function getTasksBuild($current_route_name);
 
+  /**
+   * Collects the local tasks (tabs) for the current route.
+   *
+   * @param string $route_name
+   *   The route for which to make renderable local tasks.
+   * @param int $level
+   *   The level of tasks you ask for. Primary tasks are 0, secondary are 1.
+   *
+   * @return array
+   *   An array containing
+   *   - tabs: Local tasks render array for the requested level.
+   *   - route_name: The route name for the current page used to collect the
+   *     local tasks.
+   *
+   * @see hook_menu_local_tasks_alter()
+   */
+  public function getLocalTasks($route_name, $level = 0);
+
 }
diff --git a/core/lib/Drupal/Core/Menu/Plugin/Block/LocalActionsBlock.php b/core/lib/Drupal/Core/Menu/Plugin/Block/LocalActionsBlock.php
new file mode 100644
index 0000000..c8348e0
--- /dev/null
+++ b/core/lib/Drupal/Core/Menu/Plugin/Block/LocalActionsBlock.php
@@ -0,0 +1,125 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Core\Plugin\Block\LocalActionsBlock.
+ */
+
+namespace Drupal\Core\Menu\Plugin\Block;
+
+use Drupal\Core\Block\BlockBase;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Menu\LocalActionManagerInterface;
+use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Drupal\Core\Routing\RouteMatchInterface;
+
+/**
+ * Provides a block to display the local actions.
+ *
+ * @Block(
+ *   id = "local_actions_block",
+ *   admin_label = @Translation("Primary admin actions")
+ * )
+ */
+class LocalActionsBlock extends BlockBase implements ContainerFactoryPluginInterface {
+
+  /**
+   * The local action manager.
+   *
+   * @var \Drupal\Core\Menu\LocalActionManagerInterface
+   */
+  protected $localActionManager;
+
+  /**
+   * The route match.
+   *
+   * @var \Drupal\Core\Routing\RouteMatchInterface
+   */
+  protected $routeMatch;
+
+  /**
+   * Creates a LocalActionsBlock instance.
+   *
+   * @param array $configuration
+   *   A configuration array containing information about the plugin instance.
+   * @param string $plugin_id
+   *   The plugin_id for the plugin instance.
+   * @param mixed $plugin_definition
+   *   The plugin implementation definition.
+   * @param \Drupal\Core\Menu\LocalActionManagerInterface $local_action_manager
+   *   A local action manager.
+   * @param \Drupal\Core\Routing\RouteMatchInterface $route_match
+   *   The route match.
+   */
+  public function __construct(array $configuration, $plugin_id, $plugin_definition, LocalActionManagerInterface $local_action_manager, RouteMatchInterface $route_match) {
+    parent::__construct($configuration, $plugin_id, $plugin_definition);
+    $this->localActionManager = $local_action_manager;
+    $this->routeMatch = $route_match;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
+    return new static(
+      $configuration,
+      $plugin_id,
+      $plugin_definition,
+      $container->get('plugin.manager.menu.local_action'),
+      $container->get('current_route_match')
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function defaultConfiguration() {
+    return ['label_display' => FALSE];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function build() {
+    $route_name = $this->routeMatch->getRouteName();
+    $local_actions = $this->localActionManager->getActionsForRoute($route_name);
+    if (empty($local_actions)) {
+      return [];
+    }
+
+    return $local_actions;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
+    $form = parent::buildConfigurationForm($form, $form_state);
+
+    // The "Primary admin actions" block is never cacheable because hooks creating local
+    // actions don't provide cacheability metadata.
+    // @todo Remove after https://www.drupal.org/node/2511516 has landed.
+    $form['cache']['#disabled'] = TRUE;
+    $form['cache']['#description'] = $this->t('This block is never cacheable.');
+    $form['cache']['max_age']['#value'] = 0;
+
+    return $form;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getCacheMaxAge() {
+    // @todo Remove after https://www.drupal.org/node/2511516 has landed.
+    return 0;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getCacheContexts() {
+    return ['route.name'];
+  }
+
+}
diff --git a/core/lib/Drupal/Core/Menu/Plugin/Block/LocalTasksBlock.php b/core/lib/Drupal/Core/Menu/Plugin/Block/LocalTasksBlock.php
new file mode 100644
index 0000000..6edfc6b
--- /dev/null
+++ b/core/lib/Drupal/Core/Menu/Plugin/Block/LocalTasksBlock.php
@@ -0,0 +1,187 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Core\Menu\Plugin\Block\LocalTasksBlock.
+ */
+
+namespace Drupal\Core\Menu\Plugin\Block;
+
+use Drupal\Core\Block\BlockBase;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Menu\LocalTaskManagerInterface;
+use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
+use Drupal\Core\Render\Element;
+use Drupal\Core\Routing\RouteMatchInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Provides a "Tabs" block to display the local tasks.
+ *
+ * @Block(
+ *   id = "local_tasks_block",
+ *   admin_label = @Translation("Tabs"),
+ * )
+ */
+class LocalTasksBlock extends BlockBase implements ContainerFactoryPluginInterface {
+
+  /**
+   * The local task manager.
+   *
+   * @var \Drupal\Core\Menu\LocalTaskManagerInterface
+   */
+  protected $localTaskManager;
+
+  /**
+   * The route match.
+   *
+   * @var \Drupal\Core\Routing\RouteMatchInterface
+   */
+  protected $routeMatch;
+
+  /**
+   * Creates a LocalTasksBlock instance.
+   *
+   * @param array $configuration
+   *   A configuration array containing information about the plugin instance.
+   * @param string $plugin_id
+   *   The plugin_id for the plugin instance.
+   * @param mixed $plugin_definition
+   *   The plugin implementation definition.
+   * @param \Drupal\Core\Menu\LocalTaskManagerInterface $local_task_manager
+   *   The local task manager.
+   * @param \Drupal\Core\Routing\RouteMatchInterface $route_match
+   *   The route match.
+   */
+  public function __construct(array $configuration, $plugin_id, $plugin_definition, LocalTaskManagerInterface $local_task_manager, RouteMatchInterface $route_match) {
+    parent::__construct($configuration, $plugin_id, $plugin_definition);
+    $this->localTaskManager = $local_task_manager;
+    $this->routeMatch = $route_match;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
+    return new static(
+      $configuration,
+      $plugin_id,
+      $plugin_definition,
+      $container->get('plugin.manager.menu.local_task'),
+      $container->get('current_route_match')
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function defaultConfiguration() {
+    return [
+      'label_display' => FALSE,
+      'primary' => TRUE,
+      'secondary' => TRUE,
+    ];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function build() {
+    $config = $this->configuration;
+
+    $tabs = [
+      '#theme' => 'menu_local_tasks',
+    ];
+
+    // Add only selected levels for the printed output.
+    if ($config['primary']) {
+      $links = $this->localTaskManager->getLocalTasks($this->routeMatch->getRouteName(), 0);
+      // Do not display single tabs.
+      $tabs += [
+        '#primary' => count(Element::getVisibleChildren($links['tabs'])) > 1 ? $links['tabs'] : [],
+      ];
+    }
+    if ($config['secondary']) {
+      $links = $this->localTaskManager->getLocalTasks($this->routeMatch->getRouteName(), 1);
+      // Do not display single tabs.
+      $tabs += [
+        '#secondary' => count(Element::getVisibleChildren($links['tabs'])) > 1 ? $links['tabs'] : [],
+      ];
+    }
+
+    if (empty($tabs['#primary']) && empty($tabs['#secondary'])) {
+      return [];
+    }
+
+    return $tabs;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
+    $form = parent::buildConfigurationForm($form, $form_state);
+
+    // The "Page actions" block is never cacheable because of hooks creating
+    // local tasks doesn't provide cacheability metadata.
+    // @todo Remove after https://www.drupal.org/node/2511516 has landed.
+    $form['cache']['#disabled'] = TRUE;
+    $form['cache']['#description'] = $this->t('This block is never cacheable.');
+    $form['cache']['max_age']['#value'] = 0;
+
+    return $form;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getCacheMaxAge() {
+    // @todo Remove after https://www.drupal.org/node/2511516 has landed.
+    return 0;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getCacheContexts() {
+    return ['route.name'];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function blockForm($form, FormStateInterface $form_state) {
+    $config = $this->configuration;
+    $defaults = $this->defaultConfiguration();
+
+    $form['levels'] = [
+      '#type' => 'details',
+      '#title' => $this->t('Shown tabs'),
+      '#description' => $this->t('Select tabs being shown in the block'),
+      // Open if not set to defaults.
+      '#open' => $defaults['primary'] !== $config['primary'] || $defaults['secondary'] !== $config['secondary'],
+    ];
+    $form['levels']['primary'] = [
+      '#type' => 'checkbox',
+      '#title' => $this->t('Show primary tabs'),
+      '#default_value' => $config['primary'],
+    ];
+    $form['levels']['secondary'] = [
+      '#type' => 'checkbox',
+      '#title' => $this->t('Show secondary tabs'),
+      '#default_value' => $config['secondary'],
+    ];
+
+    return $form;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function blockSubmit($form, FormStateInterface $form_state) {
+    $levels = $form_state->getValue('levels');
+    $this->configuration['primary'] = $levels['primary'];
+    $this->configuration['secondary'] = $levels['secondary'];
+  }
+
+}
diff --git a/core/lib/Drupal/Core/Menu/menu.api.php b/core/lib/Drupal/Core/Menu/menu.api.php
index e68b795..971a193 100644
--- a/core/lib/Drupal/Core/Menu/menu.api.php
+++ b/core/lib/Drupal/Core/Menu/menu.api.php
@@ -393,48 +393,35 @@ function hook_menu_links_discovered_alter(&$links) {
 }
 
 /**
- * Alter tabs and actions displayed on the page before they are rendered.
+ * Alter local tasks displayed on the page before they are rendered.
  *
  * This hook is invoked by menu_local_tasks(). The system-determined tabs and
- * actions are passed in by reference. Additional tabs or actions may be added.
+ * actions are passed in by reference. Additional tabs may be added.
  *
- * Each tab or action is an associative array containing:
+ * The local tasks are under the 'tabs' element and keyed by plugin ID.
+ *
+ * Each local task is an associative array containing:
  * - #theme: The theme function to use to render.
  * - #link: An associative array containing:
  *   - title: The localized title of the link.
- *   - href: The system path to link to.
+ *   - url: a Url object.
  *   - localized_options: An array of options to pass to _l().
  * - #weight: The link's weight compared to other links.
  * - #active: Whether the link should be marked as 'active'.
  *
  * @param array $data
- *   An associative array containing:
- *   - actions: A list of of actions keyed by their href, each one being an
- *     associative array as described above.
- *   - tabs: A list of (up to 2) tab levels that contain a list of of tabs keyed
- *     by their href, each one being an associative array as described above.
+ *   An associative array containing list of (up to 2) tab levels that contain a
+ *   list of of tabs keyed by their href, each one being an associative array
+ *   as described above.
  * @param string $route_name
  *   The route name of the page.
  *
  * @ingroup menu
  */
-function hook_menu_local_tasks(&$data, $route_name) {
-  // Add an action linking to node/add to all pages.
-  $data['actions']['node/add'] = array(
-      '#theme' => 'menu_local_action',
-      '#link' => array(
-          'title' => t('Add content'),
-          'url' => Url::fromRoute('node.add_page'),
-          'localized_options' => array(
-              'attributes' => array(
-                  'title' => t('Add content'),
-              ),
-          ),
-      ),
-  );
+function hook_menu_local_tasks_alter(&$data, $route_name) {
 
   // Add a tab linking to node/add to all pages.
-  $data['tabs'][0]['node/add'] = array(
+  $data['tabs'][0]['node.add_page'] = array(
       '#theme' => 'menu_local_task',
       '#link' => array(
           'title' => t('Example tab'),
@@ -449,25 +436,6 @@ function hook_menu_local_tasks(&$data, $route_name) {
 }
 
 /**
- * Alter tabs and actions displayed on the page before they are rendered.
- *
- * This hook is invoked by menu_local_tasks(). The system-determined tabs and
- * actions are passed in by reference. Existing tabs or actions may be altered.
- *
- * @param array $data
- *   An associative array containing tabs and actions. See
- *   hook_menu_local_tasks() for details.
- * @param string $route_name
- *   The route name of the page.
- *
- * @see hook_menu_local_tasks()
- *
- * @ingroup menu
- */
-function hook_menu_local_tasks_alter(&$data, $route_name) {
-}
-
-/**
  * Alter local actions plugins.
  *
  * @param array $local_actions
diff --git a/core/modules/aggregator/src/Tests/AggregatorTestBase.php b/core/modules/aggregator/src/Tests/AggregatorTestBase.php
index 312a0b1..08c0c23 100644
--- a/core/modules/aggregator/src/Tests/AggregatorTestBase.php
+++ b/core/modules/aggregator/src/Tests/AggregatorTestBase.php
@@ -29,7 +29,7 @@
    *
    * @var array
    */
-  public static $modules = array('node', 'aggregator', 'aggregator_test', 'views');
+  public static $modules = ['block', 'node', 'aggregator', 'aggregator_test', 'views'];
 
   /**
    * {@inheritdoc}
@@ -44,6 +44,7 @@ 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('local_tasks_block');
   }
 
   /**
diff --git a/core/modules/block/src/Tests/BlockHiddenRegionTest.php b/core/modules/block/src/Tests/BlockHiddenRegionTest.php
index 347cdaf..a6af2ce 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('local_tasks_block');
   }
 
   /**
diff --git a/core/modules/block/src/Tests/BlockTest.php b/core/modules/block/src/Tests/BlockTest.php
index cff4a24..bd360f6 100644
--- a/core/modules/block/src/Tests/BlockTest.php
+++ b/core/modules/block/src/Tests/BlockTest.php
@@ -222,6 +222,7 @@ public function testBlockThemeSelector() {
   function testThemeName() {
     // Enable the help block.
     $this->drupalPlaceBlock('help_block', array('region' => 'help'));
+    $this->drupalPlaceBlock('local_tasks_block');
     // Explicitly set the default and admin themes.
     $theme = 'block_test_specialchars_theme';
     \Drupal::service('theme_handler')->install(array($theme));
diff --git a/core/modules/block/src/Tests/NonDefaultBlockAdminTest.php b/core/modules/block/src/Tests/NonDefaultBlockAdminTest.php
index bc55ab2..a2bfddc 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('local_tasks_block');
+  }
+
+  /**
    * Test non-default theme admin.
    */
   function testNonDefaultBlockAdmin() {
diff --git a/core/modules/block_content/src/Tests/BlockContentTestBase.php b/core/modules/block_content/src/Tests/BlockContentTestBase.php
index 82139c0..3e0aa74 100644
--- a/core/modules/block_content/src/Tests/BlockContentTestBase.php
+++ b/core/modules/block_content/src/Tests/BlockContentTestBase.php
@@ -60,6 +60,7 @@ protected function setUp() {
     }
 
     $this->adminUser = $this->drupalCreateUser($this->permissions);
+    $this->drupalPlaceBlock('local_actions_block');
   }
 
   /**
diff --git a/core/modules/comment/src/Tests/CommentTestBase.php b/core/modules/comment/src/Tests/CommentTestBase.php
index a52cbb3..12ea894 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('local_tasks_block');
   }
 
   /**
diff --git a/core/modules/config/src/Tests/ConfigEntityListTest.php b/core/modules/config/src/Tests/ConfigEntityListTest.php
index ee58be5..9b74a5f 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('local_actions_block');
   }
 
   /**
diff --git a/core/modules/config_translation/src/Tests/ConfigTranslationListUiTest.php b/core/modules/config_translation/src/Tests/ConfigTranslationListUiTest.php
index 4ceec20..fceb41d 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('local_tasks_block');
   }
 
   /**
diff --git a/core/modules/config_translation/src/Tests/ConfigTranslationOverviewTest.php b/core/modules/config_translation/src/Tests/ConfigTranslationOverviewTest.php
index 0916dcd..221b7d6 100644
--- a/core/modules/config_translation/src/Tests/ConfigTranslationOverviewTest.php
+++ b/core/modules/config_translation/src/Tests/ConfigTranslationOverviewTest.php
@@ -24,6 +24,7 @@ class ConfigTranslationOverviewTest extends WebTestBase {
    * @var array
    */
   public static $modules = [
+    'block',
     'config_test',
     'config_translation',
     'config_translation_test',
@@ -67,6 +68,7 @@ protected function setUp() {
       ConfigurableLanguage::createFromLangcode($langcode)->save();
     }
     $this->localeStorage = $this->container->get('locale.storage');
+    $this->drupalPlaceBlock('local_tasks_block');
   }
 
   /**
diff --git a/core/modules/config_translation/src/Tests/ConfigTranslationUiTest.php b/core/modules/config_translation/src/Tests/ConfigTranslationUiTest.php
index f220d1a..98a1816 100644
--- a/core/modules/config_translation/src/Tests/ConfigTranslationUiTest.php
+++ b/core/modules/config_translation/src/Tests/ConfigTranslationUiTest.php
@@ -31,6 +31,7 @@ class ConfigTranslationUiTest extends WebTestBase {
    * @var array
    */
   public static $modules = [
+    'block',
     'config_translation',
     'config_translation_test',
     'contact',
@@ -117,6 +118,7 @@ protected function setUp() {
       ConfigurableLanguage::createFromLangcode($langcode)->save();
     }
     $this->localeStorage = $this->container->get('locale.storage');
+    $this->drupalPlaceBlock('local_tasks_block');
   }
 
   /**
diff --git a/core/modules/contact/src/Tests/ContactSitewideTest.php b/core/modules/contact/src/Tests/ContactSitewideTest.php
index 1ab942b..83f296f 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('local_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/field_ui/src/Tests/EntityDisplayModeTest.php b/core/modules/field_ui/src/Tests/EntityDisplayModeTest.php
index 7b7fe12..1a6007c 100644
--- a/core/modules/field_ui/src/Tests/EntityDisplayModeTest.php
+++ b/core/modules/field_ui/src/Tests/EntityDisplayModeTest.php
@@ -19,9 +19,18 @@ class EntityDisplayModeTest extends WebTestBase {
   /**
    * Modules to enable.
    *
-   * @var array
+   * @var string[]
    */
-  public static $modules = array('entity_test', 'field_ui');
+  public static $modules = ['block', 'entity_test', 'field_ui'];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+
+    $this->drupalPlaceBlock('local_actions_block');
+  }
 
   /**
    * Tests the EntityViewMode user interface.
diff --git a/core/modules/field_ui/src/Tests/FieldUIRouteTest.php b/core/modules/field_ui/src/Tests/FieldUIRouteTest.php
index 6b68043..181d3c3 100644
--- a/core/modules/field_ui/src/Tests/FieldUIRouteTest.php
+++ b/core/modules/field_ui/src/Tests/FieldUIRouteTest.php
@@ -23,7 +23,7 @@ class FieldUIRouteTest extends WebTestBase {
    *
    * @var string[]
    */
-  public static $modules = array('entity_test', 'field_ui');
+  public static $modules = ['block', 'entity_test', 'field_ui'];
 
   /**
    * {@inheritdoc}
@@ -32,6 +32,7 @@ protected function setUp() {
     parent::setUp();
 
     $this->drupalLogin($this->rootUser);
+    $this->drupalPlaceBlock('local_tasks_block');
   }
 
   /**
diff --git a/core/modules/field_ui/src/Tests/ManageFieldsTest.php b/core/modules/field_ui/src/Tests/ManageFieldsTest.php
index 3b2ac3e..6872bcf 100644
--- a/core/modules/field_ui/src/Tests/ManageFieldsTest.php
+++ b/core/modules/field_ui/src/Tests/ManageFieldsTest.php
@@ -66,7 +66,10 @@ class ManageFieldsTest extends WebTestBase {
    */
   protected function setUp() {
     parent::setUp();
+
     $this->drupalPlaceBlock('system_breadcrumb_block');
+    $this->drupalPlaceBlock('local_actions_block');
+    $this->drupalPlaceBlock('local_tasks_block');
 
     // Create a test user.
     $admin_user = $this->drupalCreateUser(array('access content', 'administer content types', 'administer node fields', 'administer node form display', 'administer node display', 'administer taxonomy', 'administer taxonomy_term fields', 'administer taxonomy_term display', 'administer users', 'administer account settings', 'administer user display', 'bypass node access'));
diff --git a/core/modules/filter/src/Tests/FilterAdminTest.php b/core/modules/filter/src/Tests/FilterAdminTest.php
index 54a7237..0c61a9e 100644
--- a/core/modules/filter/src/Tests/FilterAdminTest.php
+++ b/core/modules/filter/src/Tests/FilterAdminTest.php
@@ -25,7 +25,7 @@ class FilterAdminTest extends WebTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = ['filter', 'node', 'filter_test_plugin', 'dblog'];
+  public static $modules = ['block', 'filter', 'node', 'filter_test_plugin', 'dblog'];
 
   /**
    * An user with administration permissions.
@@ -109,6 +109,7 @@ 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('local_actions_block');
   }
 
   /**
diff --git a/core/modules/filter/src/Tests/FilterFormatAccessTest.php b/core/modules/filter/src/Tests/FilterFormatAccessTest.php
index 029c60b..b9eeaa7 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('local_tasks_block');
   }
 
   /**
diff --git a/core/modules/forum/src/Tests/ForumTest.php b/core/modules/forum/src/Tests/ForumTest.php
index 3861f66..767e3e3 100644
--- a/core/modules/forum/src/Tests/ForumTest.php
+++ b/core/modules/forum/src/Tests/ForumTest.php
@@ -115,6 +115,7 @@ protected function setUp() {
       'access comments',
     ));
     $this->drupalPlaceBlock('help_block', array('region' => 'help'));
+    $this->drupalPlaceBlock('local_actions_block');
   }
 
   /**
diff --git a/core/modules/language/src/Tests/LanguagePathMonolingualTest.php b/core/modules/language/src/Tests/LanguagePathMonolingualTest.php
index c20a57e..aaccec0 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('local_actions_block');
   }
 
   /**
diff --git a/core/modules/language/src/Tests/LanguageTourTest.php b/core/modules/language/src/Tests/LanguageTourTest.php
index 98418b6..6d8ec6a 100644
--- a/core/modules/language/src/Tests/LanguageTourTest.php
+++ b/core/modules/language/src/Tests/LanguageTourTest.php
@@ -28,7 +28,7 @@ class LanguageTourTest extends TourTestBase {
    *
    * @var array
    */
-  public static $modules = array('language', 'tour');
+  public static $modules = ['block', 'language', 'tour'];
 
   /**
    * {@inheritdoc}
@@ -37,6 +37,7 @@ protected function setUp() {
     parent::setUp();
     $this->adminUser = $this->drupalCreateUser(array('administer languages', 'access tour'));
     $this->drupalLogin($this->adminUser);
+    $this->drupalPlaceBlock('local_actions_block');
   }
 
   /**
diff --git a/core/modules/node/src/Tests/NodeTranslationUITest.php b/core/modules/node/src/Tests/NodeTranslationUITest.php
index fe3a4bc..bcb9de9 100644
--- a/core/modules/node/src/Tests/NodeTranslationUITest.php
+++ b/core/modules/node/src/Tests/NodeTranslationUITest.php
@@ -27,6 +27,7 @@ class NodeTranslationUITest extends ContentTranslationUITestBase {
   protected $defaultCacheContexts = [
     'languages:language_interface',
     'theme',
+    'route.name',
     'route.menu_active_trails:account',
     'route.menu_active_trails:footer',
     'route.menu_active_trails:main',
diff --git a/core/modules/node/src/Tests/PageEditTest.php b/core/modules/node/src/Tests/PageEditTest.php
index 9082dca..31d6ea9 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 string[]
+   */
+  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('local_tasks_block');
   }
 
   /**
diff --git a/core/modules/page_cache/src/Tests/PageCacheTagsIntegrationTest.php b/core/modules/page_cache/src/Tests/PageCacheTagsIntegrationTest.php
index c471cea..f19ac70 100644
--- a/core/modules/page_cache/src/Tests/PageCacheTagsIntegrationTest.php
+++ b/core/modules/page_cache/src/Tests/PageCacheTagsIntegrationTest.php
@@ -103,6 +103,8 @@ function testPageCacheTags() {
       'config:block.block.bartik_main_menu',
       'config:block.block.bartik_account_menu',
       'config:block.block.bartik_messages',
+      'config:block.block.bartik_local_actions',
+      'config:block.block.bartik_local_tasks',
       'node_view',
       'node:' . $node_1->id(),
       'user:' . $author_1->id(),
@@ -137,6 +139,8 @@ function testPageCacheTags() {
       'config:block.block.bartik_main_menu',
       'config:block.block.bartik_account_menu',
       'config:block.block.bartik_messages',
+      'config:block.block.bartik_local_actions',
+      'config:block.block.bartik_local_tasks',
       'node_view',
       'node:' . $node_2->id(),
       'user:' . $author_2->id(),
diff --git a/core/modules/search/src/Tests/SearchConfigSettingsFormTest.php b/core/modules/search/src/Tests/SearchConfigSettingsFormTest.php
index a99ea45..2c17ed6 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('local_tasks_block');
   }
 
   /**
diff --git a/core/modules/search/src/Tests/SearchPageTextTest.php b/core/modules/search/src/Tests/SearchPageTextTest.php
index 408848c..8a95fe6 100644
--- a/core/modules/search/src/Tests/SearchPageTextTest.php
+++ b/core/modules/search/src/Tests/SearchPageTextTest.php
@@ -23,11 +23,22 @@ class SearchPageTextTest extends SearchTestBase {
    */
   protected $searchingUser;
 
+  /**
+   * Modules to enable.
+   *
+   * @var string[]
+   */
+  public static $modules = ['block'];
+
+  /**
+   * {@inheritdoc}
+   */
   protected function setUp() {
     parent::setUp();
 
     // Create user.
     $this->searchingUser = $this->drupalCreateUser(array('search content', 'access user profiles', 'use advanced search'));
+    $this->drupalPlaceBlock('local_tasks_block');
   }
 
   /**
diff --git a/core/modules/shortcut/src/Tests/ShortcutSetsTest.php b/core/modules/shortcut/src/Tests/ShortcutSetsTest.php
index 26a3171..bc3c5f9 100644
--- a/core/modules/shortcut/src/Tests/ShortcutSetsTest.php
+++ b/core/modules/shortcut/src/Tests/ShortcutSetsTest.php
@@ -17,6 +17,22 @@
 class ShortcutSetsTest extends ShortcutTestBase {
 
   /**
+   * Modules to enable.
+   *
+   * @var string[]
+   */
+  public static $modules = ['block'];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+
+    $this->drupalPlaceBlock('local_actions_block');
+  }
+
+  /**
    * Tests creating a shortcut set.
    */
   function testShortcutSetAdd() {
diff --git a/core/modules/simpletest/src/Tests/BrowserTest.php b/core/modules/simpletest/src/Tests/BrowserTest.php
index 02422e7..3e58c0d 100644
--- a/core/modules/simpletest/src/Tests/BrowserTest.php
+++ b/core/modules/simpletest/src/Tests/BrowserTest.php
@@ -24,6 +24,22 @@ class BrowserTest extends WebTestBase {
   protected static $cookieSet = FALSE;
 
   /**
+   * Modules to enable.
+   *
+   * @var string[]
+   */
+  public static $modules = ['block'];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+
+    $this->drupalPlaceBlock('local_tasks_block');
+  }
+
+  /**
    * Test \Drupal\simpletest\WebTestBase::getAbsoluteUrl().
    */
   function testGetAbsoluteUrl() {
diff --git a/core/modules/system/config/schema/system.schema.yml b/core/modules/system/config/schema/system.schema.yml
index 12b0e6c..b4a8873 100644
--- a/core/modules/system/config/schema/system.schema.yml
+++ b/core/modules/system/config/schema/system.schema.yml
@@ -342,6 +342,17 @@ block.settings.system_menu_block:*:
       type: integer
       label: 'Maximum number of levels'
 
+block.settings.local_tasks_block:
+  type: block_settings
+  label: 'Tabs block'
+  mapping:
+    primary:
+      type: boolean
+      label: 'Whether primary tabs are shown'
+    secondary:
+      type: boolean
+      label: 'Whether secondary tabs are shown'
+
 condition.plugin.request_path:
   type: condition.plugin
   mapping:
diff --git a/core/modules/system/src/Tests/Menu/LocalActionTest.php b/core/modules/system/src/Tests/Menu/LocalActionTest.php
index cd6dc81..22f188d 100644
--- a/core/modules/system/src/Tests/Menu/LocalActionTest.php
+++ b/core/modules/system/src/Tests/Menu/LocalActionTest.php
@@ -19,9 +19,20 @@
 class LocalActionTest extends WebTestBase {
 
   /**
+   * Modules to enable.
+   *
+   * @var string[]
+   */
+  public static $modules = ['block', 'menu_test'];
+
+  /**
    * {@inheritdoc}
    */
-  public static $modules = array('menu_test');
+  protected function setUp() {
+    parent::setUp();
+
+    $this->drupalPlaceBlock('local_actions_block');
+  }
 
   /**
    * Tests appearance of local actions.
diff --git a/core/modules/system/src/Tests/Menu/LocalTasksTest.php b/core/modules/system/src/Tests/Menu/LocalTasksTest.php
index 1a0ce81..4030c48 100644
--- a/core/modules/system/src/Tests/Menu/LocalTasksTest.php
+++ b/core/modules/system/src/Tests/Menu/LocalTasksTest.php
@@ -18,7 +18,28 @@
  */
 class LocalTasksTest extends WebTestBase {
 
-  public static $modules = array('menu_test', 'entity_test');
+  /**
+   * Modules to enable.
+   *
+   * @var string[]
+   */
+  public static $modules = ['block', 'menu_test', 'entity_test'];
+
+  /**
+   * The local tasks block under testing.
+   *
+   * @var \Drupal\block\Entity\Block
+   */
+  protected $sut;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+
+    $this->sut = $this->drupalPlaceBlock('local_tasks_block', ['id' => 'tabs_block']);
+  }
 
   /**
    * Asserts local tasks in the page output.
@@ -66,6 +87,20 @@ protected function assertLocalTaskAppers($title) {
   }
 
   /**
+   * Asserts that the local tasks on the specified level are not being printed.
+   *
+   * @param int $level
+   *   (optional) The local tasks level to assert; 0 for primary, 1 for
+   *   secondary. Defaults to 0.
+   */
+  protected function assertNoLocalTasks($level = 0) {
+    $elements = $this->xpath('//*[contains(@class, :class)]//a', array(
+      ':class' => $level == 0 ? 'tabs primary' : 'tabs secondary',
+    ));
+    $this->assertFalse(count($elements), 'Local tasks not found.');
+  }
+
+  /**
    * Tests the plugin based local tasks.
    */
   public function testPluginLocalTask() {
@@ -172,4 +207,52 @@ public function testPluginLocalTask() {
     $this->assertEqual('upcasting sub2', (string) $result[0]->a, 'The "upcasting sub2" tab is active.');
   }
 
+  /**
+   * Tests that local task blocks are configurable to show a specific level.
+   */
+  public function testLocalTaskBlock() {
+    // Remove the default block and create a new one.
+    $this->sut->delete();
+
+    $this->sut = $this->drupalPlaceBlock('local_tasks_block', [
+      'id' => 'tabs_block',
+      'primary' => TRUE,
+      'secondary' => FALSE,
+    ]);
+
+    $this->drupalGet(Url::fromRoute('menu_test.local_task_test_tasks_settings'));
+
+    // Verify that local tasks in the first level appear.
+    $this->assertLocalTasks([
+      ['menu_test.local_task_test_tasks_view', []],
+      ['menu_test.local_task_test_tasks_edit', []],
+      ['menu_test.local_task_test_tasks_settings', []],
+    ]);
+
+    // Verify that local tasks in the second level doesn't appear.
+    $this->assertNoLocalTasks(1);
+
+    $this->sut->delete();
+    $this->sut = $this->drupalPlaceBlock('local_tasks_block', [
+      'id' => 'tabs_block',
+      'primary' => FALSE,
+      'secondary' => TRUE,
+    ]);
+
+    $this->drupalGet(Url::fromRoute('menu_test.local_task_test_tasks_settings'));
+
+    // Verify that local tasks in the first level doesn't appear.
+    $this->assertNoLocalTasks(0);
+
+    // Verify that local tasks in the second level appear.
+    $sub_tasks = [
+      ['menu_test.local_task_test_tasks_settings_sub1', []],
+      ['menu_test.local_task_test_tasks_settings_sub2', []],
+      ['menu_test.local_task_test_tasks_settings_sub3', []],
+      ['menu_test.local_task_test_tasks_settings_derived', ['placeholder' => 'derive1']],
+      ['menu_test.local_task_test_tasks_settings_derived', ['placeholder' => 'derive2']],
+    ];
+    $this->assertLocalTasks($sub_tasks, 1);
+  }
+
 }
diff --git a/core/modules/system/src/Tests/Menu/MenuRouterTest.php b/core/modules/system/src/Tests/Menu/MenuRouterTest.php
index 7fd809d..21052a4 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('local_tasks_block');
   }
 
   /**
diff --git a/core/modules/system/src/Tests/Menu/MenuTranslateTest.php b/core/modules/system/src/Tests/Menu/MenuTranslateTest.php
index e316c95..3641ab1 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('local_tasks_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 4fdc279..39dac52 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('local_actions_block');
   }
 
   /**
diff --git a/core/modules/system/src/Tests/System/ThemeTest.php b/core/modules/system/src/Tests/System/ThemeTest.php
index 7c85275..f4e87e1 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('local_tasks_block');
   }
 
   /**
diff --git a/core/modules/system/src/Tests/Update/LocalActionsAndTasksConvertedIntoBlocksUpdateTest.php b/core/modules/system/src/Tests/Update/LocalActionsAndTasksConvertedIntoBlocksUpdateTest.php
new file mode 100644
index 0000000..0665f40
--- /dev/null
+++ b/core/modules/system/src/Tests/Update/LocalActionsAndTasksConvertedIntoBlocksUpdateTest.php
@@ -0,0 +1,91 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\system\Tests\Update\LocalActionsAndTasksConvertedIntoBlocksUpdateTest.
+ */
+
+namespace Drupal\system\Tests\Update;
+
+use Drupal\node\Entity\Node;
+
+/**
+ * Tests the upgrade path for local actions/tasks being converted into blocks.
+ *
+ * @see https://www.drupal.org/node/507488
+ *
+ * @group system
+ */
+class LocalActionsAndTasksConvertedIntoBlocksUpdateTest extends UpdatePathTestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setDatabaseDumpFiles() {
+    $this->databaseDumpFiles = [
+      __DIR__ . '/../../../../system/tests/fixtures/update/drupal-8.bare.standard.php.gz',
+      __DIR__ . '/../../../../system/tests/fixtures/update/drupal-8.local-actions-tasks-into-blocks-507488.php',
+    ];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setUp() {
+    parent::setUp();
+    /** @var \Drupal\Core\Extension\ThemeHandlerInterface $theme_handler */
+    $theme_handler = \Drupal::service('theme_handler');
+    $theme_handler->refreshInfo();
+  }
+
+  /**
+   * Tests that local actions/tasks are being converted into blocks.
+   */
+  public function testUpdateHookN() {
+    $this->runUpdates();
+
+    /** @var \Drupal\block\BlockInterface $block_storage */
+    $block_storage = \Drupal::entityManager()->getStorage('block');
+    /* @var \Drupal\block\BlockInterface[] $help_blocks */
+    $help_blocks = $block_storage->loadByProperties(['theme' => 'bartik', 'region' => 'help']);
+
+    $this->assertRaw('Because your site has custom theme(s) installed, we had to set local actions and tasks blocks into the content region. Please manually review the block configurations and remove the removed variables from your templates.');
+
+    // Disable maintenance mode.
+    // @todo Can be removed once maintenance mode is automatically turned off
+    // after updates in https://www.drupal.org/node/2435135.
+    \Drupal::state()->set('system.maintenance_mode', FALSE);
+
+    // We finished updating so we can login the user now.
+    $this->drupalLogin($this->rootUser);
+
+    $page = Node::create([
+      'type' => 'page',
+      'title' => 'Page node',
+    ]);
+    $page->save();
+
+    // Ensures that blocks inside help region has been moved to content region.
+    foreach ($help_blocks as $block) {
+      $new_block = $block_storage->load($block->id());
+      $this->assertEqual($new_block->getRegion(), 'content');
+    }
+
+    // Local tasks are visible on the node page.
+    $this->drupalGet('node/' . $page->id());
+    $this->assertText(t('Edit'));
+
+    // Local actions are visible on the content listing page.
+    $this->drupalGet('admin/content');
+    $action_link = $this->cssSelect('.action-links');
+    $this->assertTrue($action_link);
+
+    $this->drupalGet('admin/structure/block/list/seven');
+
+    /** @var \Drupal\Core\Config\StorageInterface $config_storage */
+    $config_storage = \Drupal::service('config.storage');
+    $this->assertTrue($config_storage->exists('block.block.test_theme_local_tasks'), 'Local task block has been created for the custom theme.');
+    $this->assertTrue($config_storage->exists('block.block.test_theme_local_actions'), 'Local action block has been created for the custom theme.');
+  }
+
+}
diff --git a/core/modules/system/system.install b/core/modules/system/system.install
index ce06b7a..e6992f9 100644
--- a/core/modules/system/system.install
+++ b/core/modules/system/system.install
@@ -1154,6 +1154,11 @@ function system_schema() {
 }
 
 /**
+ * @addtogroup updates-8.0.0-beta
+ * @{
+ */
+
+/*
  * Change two fields on the default menu link storage to be serialized data.
  */
 function system_update_8001(&$sandbox = NULL) {
@@ -1268,3 +1273,179 @@ function system_update_8004() {
     $manager->updateEntityType($manager->getEntityType($entity_type_id));
   }
 }
+
+/**
+ * Place local actions and tasks blocks in every theme.
+ */
+function system_update_8005() {
+  // When block module is not installed, there is nothing that could be done
+  // except showing a warning.
+  if (!\Drupal::moduleHandler()->moduleExists('block')) {
+    return t('Block module is not enabled so local actions and tasks which have been converted to blocks, are not visible anymore.');
+  }
+  $config_factory = \Drupal::configFactory();
+  /** @var \Drupal\Core\Extension\ThemeHandlerInterface $theme_handler */
+  $theme_handler = \Drupal::service('theme_handler');
+  $custom_themes_installed = FALSE;
+  $message = NULL;
+  $langcode = \Drupal::service('language_manager')->getCurrentLanguage()->getId();
+
+  $local_actions_default_settings = [
+    'plugin' => 'local_actions_block',
+    'region' => 'content',
+    'settings.label' => 'Primary admin actions',
+    'settings.label_display' => 0,
+    'settings.cache.max_age' => 0,
+    'visibility' => [],
+    'weight' => 0,
+    'langcode' => $langcode,
+  ];
+  $tabs_default_settings = [
+    'plugin' => 'local_tasks_block',
+    'region' => 'content',
+    'settings.label' => 'Tabs',
+    'settings.label_display' => 0,
+    'settings.cache.max_age' => 0,
+    'visibility' => [],
+    'weight' => 0,
+    'langcode' => $langcode,
+  ];
+  foreach ($theme_handler->listInfo() as $theme) {
+    $theme_name = $theme->getName();
+    switch ($theme_name) {
+      case 'bartik':
+        $name = 'block.block.bartik_local_actions';
+        $values = [
+          'id' => 'bartik_local_actions',
+          'weight' => -1,
+        ] + $local_actions_default_settings;
+        _system_update_create_block($name, $theme_name, $values);
+
+        $name = 'block.block.bartik_local_tasks';
+        $values = [
+          'id' => 'bartik_local_tasks',
+          'weight' => -7,
+        ] + $tabs_default_settings;
+        _system_update_create_block($name, $theme_name, $values);
+
+        // Help region has been removed so all the blocks inside has to be moved
+        // to content region.
+        $weight = -6;
+        $blocks = [];
+        foreach ($config_factory->listAll('block.block.') as $block_config) {
+          $block = $config_factory->getEditable($block_config);
+          if ($block->get('theme') == 'bartik' && $block->get('region') == 'help') {
+            $blocks[] = $block;
+          }
+        }
+        // Sort blocks by block weight.
+        uasort($blocks, function ($a, $b) {
+          return $a->get('weight') - $b->get('weight');
+        });
+        // Move blocks to content region and set them in right order by their
+        // weight.
+        foreach ($blocks as $block) {
+          $block->set('region', 'content');
+          $block->set('weight', $weight++);
+          $block->save();
+        }
+        break;
+
+      case 'seven':
+        $name = 'block.block.seven_local_actions';
+          $values = [
+            'id' => 'seven_local_actions',
+            'weight' => -10,
+          ] + $local_actions_default_settings;
+        _system_update_create_block($name, $theme_name, $values);
+
+        $name = 'block.block.seven_primary_local_tasks';
+        $values = [
+          'region' => 'header',
+          'id' => 'seven_primary_local_tasks',
+          'settings.label' => 'Primary tabs',
+          'settings.primary' => TRUE,
+          'settings.secondary' => FALSE,
+        ] + $tabs_default_settings;
+        _system_update_create_block($name, $theme_name, $values);
+
+        $values = [
+          'region' => 'pre_content',
+          'id' => 'seven_secondary_local_tasks',
+          'settings.label' => 'Secondary tabs',
+          'settings.primary' => FALSE,
+          'settings.secondary' => TRUE,
+        ] + $tabs_default_settings;
+        _system_update_create_block($name, $theme_name, $values);
+        break;
+
+      case 'stark':
+        $name = 'block.block.stark_local_actions';
+        $values = [
+          'id' => 'stark_local_actions',
+        ] + $local_actions_default_settings;
+        _system_update_create_block($name, $theme_name, $values);
+
+        $name = 'block.block.stark_local_tasks';
+        $values = [
+          'id' => 'stark_local_tasks',
+        ] + $tabs_default_settings;
+        _system_update_create_block($name, $theme_name, $values);
+        break;
+
+      case 'classy':
+        // Don't place any blocks or trigger custom themes installed warning.
+        break;
+
+      default:
+        $custom_themes_installed = TRUE;
+        $name = sprintf('block.block.%s_local_actions', $theme_name);
+        $values = [
+          'id' => sprintf('%s_local_actions', $theme_name),
+          'weight' => -10,
+        ] + $local_actions_default_settings;
+        _system_update_create_block($name, $theme_name, $values);
+
+        $name = sprintf('block.block.%s_local_tasks', $theme_name);
+        $values = [
+          'id' => sprintf('%s_local_tasks', $theme_name),
+          'weight' => -20,
+        ] + $tabs_default_settings;
+        _system_update_create_block($name, $theme_name, $values);
+        break;
+    }
+  }
+
+  if ($custom_themes_installed) {
+    $message = t('Because your site has custom theme(s) installed, we had to set local actions and tasks blocks into the content region. Please manually review the block configurations and remove the removed variables from your templates.');
+  }
+
+  return $message;
+}
+
+/**
+ * Helper function to create block configuration objects for the update.
+ *
+ * @param string $name
+ *   The name of the config object.
+ * @param string $theme_name
+ *   The name of the theme the block is associated with.
+ * @param array $values
+ *   The block config values.
+ */
+function _system_update_create_block($name, $theme_name, array $values) {
+  if (!\Drupal::service('config.storage')->exists($name)) {
+    $block = \Drupal::configFactory()->getEditable($name);
+    $values['uuid'] = \Drupal::service('uuid')->generate();
+    $values['theme'] = $theme_name;
+    $values['dependencies.theme'] = [$theme_name];
+    foreach ($values as $key => $value) {
+      $block->set($key, $value);
+    }
+    $block->save();
+  }
+}
+
+/**
+ * @} End of "addtogroup updates-8.0.0-beta".
+ */
diff --git a/core/modules/system/templates/block--local-actions-block.html.twig b/core/modules/system/templates/block--local-actions-block.html.twig
new file mode 100644
index 0000000..65d57be
--- /dev/null
+++ b/core/modules/system/templates/block--local-actions-block.html.twig
@@ -0,0 +1,12 @@
+{% extends "@block/block.html.twig" %}
+{#
+/**
+ * @file
+ * Theme override for local actions (primary admin actions.)
+ */
+#}
+{% block content %}
+  {% if content %}
+    <nav>{{ content }}</nav>
+  {% endif %}
+{% endblock %}
diff --git a/core/modules/system/templates/page.html.twig b/core/modules/system/templates/page.html.twig
index c5a3711..b80310e 100644
--- a/core/modules/system/templates/page.html.twig
+++ b/core/modules/system/templates/page.html.twig
@@ -32,10 +32,6 @@
  * - title_suffix: Additional output populated by modules, intended to be
  *   displayed after the main title tag that appears in the template.
  * - messages: Status and error messages. Should be displayed prominently.
- * - tabs: Tabs linking to any sub-pages beneath the current page (e.g., the
- *   view and edit tabs when displaying a node).
- * - action_links: Actions local to the page, such as "Add menu" on the menu
- *   administration interface.
  * - node: Fully loaded node, if there is an automatically-loaded node
  *   associated with the page and the node ID is the second argument in the
  *   page's path (e.g. node/12345 and node/12345/revisions, but not
@@ -110,13 +106,6 @@
         <h1>{{ title }}</h1>
       {% endif %}
       {{ title_suffix }}
-
-      {{ tabs }}
-
-      {% if action_links %}
-        <nav class="action-links">{{ action_links }}</nav>
-      {% endif %}
-
       {{ page.content }}
     </div>{# /.layout-content #}
 
diff --git a/core/modules/system/tests/fixtures/update/block.block.testfor507488.yml b/core/modules/system/tests/fixtures/update/block.block.testfor507488.yml
new file mode 100644
index 0000000..a8b79fd
--- /dev/null
+++ b/core/modules/system/tests/fixtures/update/block.block.testfor507488.yml
@@ -0,0 +1,20 @@
+uuid: ee7c230c-337b-4e8f-8600-d65bfd34f171
+langcode: en
+status: true
+dependencies:
+  theme:
+    - seven
+id: seven_local_actions
+theme: seven
+region: content
+weight: -10
+provider: null
+plugin: local_actions_block
+settings:
+  id: local_actions_block
+  label: 'Primary admin actions'
+  label_display: '0'
+  cache:
+    max_age: 0
+  status: true
+visibility: {  }
diff --git a/core/modules/system/tests/fixtures/update/drupal-8.local-actions-tasks-into-blocks-507488.php b/core/modules/system/tests/fixtures/update/drupal-8.local-actions-tasks-into-blocks-507488.php
new file mode 100644
index 0000000..986362f
--- /dev/null
+++ b/core/modules/system/tests/fixtures/update/drupal-8.local-actions-tasks-into-blocks-507488.php
@@ -0,0 +1,60 @@
+<?php
+
+/**
+ * @file
+ * Contains database additions to drupal-8.bare.standard.php.gz for testing the
+ * upgrade path of https://www.drupal.org/node/507488.
+ */
+
+use Drupal\Core\Database\Database;
+
+$connection = Database::getConnection();
+
+// Structure of a custom block with visibility settings.
+$block_configs[] = \Drupal\Component\Serialization\Yaml::decode(file_get_contents(__DIR__ . '/block.block.testfor507488.yml'));
+
+foreach ($block_configs as $block_config) {
+  $connection->insert('config')
+    ->fields([
+      'collection',
+      'name',
+      'data',
+    ])
+    ->values([
+      'collection' => '',
+      'name' => 'block.block.' . $block_config['id'],
+      'data' => serialize($block_config),
+    ])
+    ->execute();
+}
+
+// Update the config entity query "index".
+$existing_blocks = $connection->select('key_value')
+    ->fields('key_value', ['value'])
+    ->condition('collection', 'config.entity.key_store.block')
+    ->condition('name', 'theme:seven')
+    ->execute()
+    ->fetchField();
+$existing_blocks = unserialize($existing_blocks);
+
+$connection->update('key_value')
+  ->fields([
+    'value' => serialize(array_merge($existing_blocks, ['block.block.seven_local_actions']))
+  ])
+  ->condition('collection', 'config.entity.key_store.block')
+  ->condition('name', 'theme:seven')
+  ->execute();
+
+// Enable test theme.
+$extensions = $connection->select('config')
+  ->fields('config', ['data'])
+  ->condition('name', 'core.extension')
+  ->execute()
+  ->fetchField();
+$extensions = unserialize($extensions);
+$connection->update('config')
+  ->fields([
+    'data' => serialize(array_merge_recursive($extensions, ['theme' => ['test_theme' => 0]]))
+  ])
+  ->condition('name', 'core.extension')
+  ->execute();
diff --git a/core/modules/system/tests/modules/menu_test/menu_test.module b/core/modules/system/tests/modules/menu_test/menu_test.module
index 429b357..60c926f 100644
--- a/core/modules/system/tests/modules/menu_test/menu_test.module
+++ b/core/modules/system/tests/modules/menu_test/menu_test.module
@@ -27,9 +27,9 @@ function menu_test_menu_links_discovered_alter(&$links) {
 }
 
 /**
- * Implements hook_menu_local_tasks().
+ * Implements hook_menu_local_tasks_alter().
  */
-function menu_test_menu_local_tasks(&$data, $route_name) {
+function menu_test_menu_local_tasks_alter(&$data, $route_name) {
   if (in_array($route_name, array('menu_test.tasks_default'))) {
     $data['tabs'][0]['foo'] = array(
       '#theme' => 'menu_local_task',
@@ -51,32 +51,6 @@ function menu_test_menu_local_tasks(&$data, $route_name) {
 }
 
 /**
- * Implements hook_menu_local_tasks_alter().
- *
- * If the menu_test.settings configuration 'tasks.alter' has been set, adds
- * several local tasks to menu-test/tasks.
- */
-function menu_test_menu_local_tasks_alter(&$data, $route_name) {
-  if (!\Drupal::config('menu_test.settings')->get('tasks.alter')) {
-    return;
-  }
-  if (in_array($route_name, array('menu_test.tasks_default', 'menu_test.tasks_empty', 'menu_test.tasks_tasks'))) {
-    // Rename the default local task from 'View' to 'Show'.
-    // $data['tabs'] is expected to be keyed by link hrefs.
-    // The default local task always links to its parent path, which means that
-    // if the tab root path appears as key in $data['tabs'], then that key is
-    // the default local task.
-    $key = $route_name . '_tab';
-    if (isset($data['tabs'][0][$key])) {
-      $data['tabs'][0][$key]['#link']['title'] = 'Show it';
-    }
-    // Rename the 'foo' task to "Advanced settings" and put it last.
-    $data['tabs'][0]['foo']['#link']['title'] = 'Advanced settings';
-    $data['tabs'][0]['foo']['#weight'] = 110;
-  }
-}
-
-/**
  * Page callback: Tests the theme negotiation functionality.
  *
  * @param bool $inherited
diff --git a/core/modules/taxonomy/src/Tests/TermTest.php b/core/modules/taxonomy/src/Tests/TermTest.php
index 3af85d8..9d06719 100644
--- a/core/modules/taxonomy/src/Tests/TermTest.php
+++ b/core/modules/taxonomy/src/Tests/TermTest.php
@@ -35,8 +35,22 @@ class TermTest extends TaxonomyTestBase {
    */
   protected $field;
 
+  /**
+   * Modules to enable.
+   *
+   * @var string[]
+   */
+  public static $modules = ['block'];
+
+  /**
+   * {@inheritdoc}
+   */
   protected function setUp() {
     parent::setUp();
+
+    $this->drupalPlaceBlock('local_actions_block');
+    $this->drupalPlaceBlock('local_tasks_block');
+
     $this->drupalLogin($this->drupalCreateUser(['administer taxonomy', 'bypass node access']));
     $this->vocabulary = $this->createVocabulary();
 
@@ -308,10 +322,7 @@ function testTermInterface() {
     // Submitting a term takes us to the add page; we need the List page.
     $this->drupalGet('admin/structure/taxonomy/manage/' . $this->vocabulary->id() . '/overview');
 
-    // Test edit link as accessed from Taxonomy administration pages.
-    // Because Simpletest creates its own database when running tests, we know
-    // the first edit link found on the listing page is to our term.
-    $this->clickLink(t('Edit'), 1);
+    $this->clickLink(t('Edit'));
 
     $this->assertRaw($edit['name[0][value]'], 'The randomly generated term name is present.');
     $this->assertText($edit['description[0][value]'], 'The randomly generated term description is present.');
diff --git a/core/modules/taxonomy/src/Tests/VocabularyUiTest.php b/core/modules/taxonomy/src/Tests/VocabularyUiTest.php
index 3a34c2e..029e99d 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('local_actions_block');
   }
 
   /**
diff --git a/core/modules/tour/src/Tests/TourTest.php b/core/modules/tour/src/Tests/TourTest.php
index 8ed261c..d0acf45 100644
--- a/core/modules/tour/src/Tests/TourTest.php
+++ b/core/modules/tour/src/Tests/TourTest.php
@@ -21,7 +21,7 @@ class TourTest extends TourTestBasic {
    *
    * @var array
    */
-  public static $modules = array('tour', 'locale', 'language', 'tour_test');
+  public static $modules = ['block', 'tour', 'locale', 'language', 'tour_test'];
 
   /**
    * The permissions required for a logged in user to test tour tips.
@@ -42,6 +42,18 @@ class TourTest extends TourTestBasic {
   );
 
   /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+
+    $this->drupalPlaceBlock('local_actions_block', [
+      'theme' => 'seven',
+      'region' => 'content'
+    ]);
+  }
+
+  /**
    * Test tour functionality.
    */
   public function testTourFunctionality() {
diff --git a/core/modules/tracker/src/Tests/TrackerTest.php b/core/modules/tracker/src/Tests/TrackerTest.php
index 246e163..d8da6e8 100644
--- a/core/modules/tracker/src/Tests/TrackerTest.php
+++ b/core/modules/tracker/src/Tests/TrackerTest.php
@@ -32,7 +32,7 @@ class TrackerTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('comment', 'tracker', 'history', 'node_test');
+  public static $modules = ['block', 'comment', 'tracker', 'history', 'node_test'];
 
   /**
    * The main user for testing.
@@ -61,6 +61,8 @@ protected function setUp() {
       'access content',
       'access user profiles',
     ));
+    $this->drupalPlaceBlock('local_tasks_block', ['id' => 'page_tabs_block']);
+    $this->drupalPlaceBlock('local_actions_block', ['id' => 'page_actions_block']);
   }
 
   /**
@@ -84,10 +86,22 @@ function testTrackerAll() {
     $this->assertLink(t('My recent content'), 0, 'User tab shows up on the global tracker page.');
 
     // Assert cache contexts, specifically the pager and node access contexts.
-    $this->assertCacheContexts(['languages:language_interface', 'theme', 'url.query_args:' . MainContentViewSubscriber::WRAPPER_FORMAT, 'url.query_args.pagers:0', 'user.node_grants:view', 'user.permissions', 'user.roles:authenticated']);
-    // Assert cache tags for the visible node and node list cache tag.
+    $this->assertCacheContexts(['languages:language_interface', 'route.name', 'theme', 'url.query_args:' . MainContentViewSubscriber::WRAPPER_FORMAT, 'url.query_args.pagers:0', 'user.node_grants:view', 'user']);
+    // Assert cache tags for the action/tabs blocks, visible node, and node list
+    // cache tag.
     $expected_tags = Cache::mergeTags($published->getCacheTags(), $published->getOwner()->getCacheTags());
-    $expected_tags = Cache::mergeTags($expected_tags, ['node_list', 'rendered']);
+    $block_tags = [
+      'block_view',
+      'config:block.block.page_actions_block',
+      'config:block.block.page_tabs_block',
+      'config:block_list',
+    ];
+    $expected_tags = Cache::mergeTags($expected_tags, $block_tags);
+    $additional_tags = [
+      'node_list',
+      'rendered',
+    ];
+    $expected_tags = Cache::mergeTags($expected_tags, $additional_tags);
     $this->assertCacheTags($expected_tags);
 
     // Delete a node and ensure it no longer appears on the tracker.
@@ -150,16 +164,27 @@ function testTrackerUser() {
     $this->assertText($other_published_my_comment->label(), "Nodes that the user has commented on appear in the user's tracker listing.");
 
     // Assert cache contexts.
-    $this->assertCacheContexts(['languages:language_interface', 'theme', 'url.query_args:' . MainContentViewSubscriber::WRAPPER_FORMAT, 'url.query_args.pagers:0', 'user', 'user.node_grants:view']);
+    $this->assertCacheContexts(['languages:language_interface', 'route.name', 'theme', 'url.query_args:' . MainContentViewSubscriber::WRAPPER_FORMAT, 'url.query_args.pagers:0', 'user', 'user.node_grants:view']);
     // Assert cache tags for the visible nodes (including owners) and node list
     // cache tag.
     $expected_tags = Cache::mergeTags($my_published->getCacheTags(), $my_published->getOwner()->getCacheTags());
     $expected_tags = Cache::mergeTags($expected_tags, $other_published_my_comment->getCacheTags());
     $expected_tags = Cache::mergeTags($expected_tags, $other_published_my_comment->getOwner()->getCacheTags());
-    $expected_tags = Cache::mergeTags($expected_tags, ['node_list', 'rendered']);
+    $block_tags = [
+      'block_view',
+      'config:block.block.page_actions_block',
+      'config:block.block.page_tabs_block',
+      'config:block_list',
+    ];
+    $expected_tags = Cache::mergeTags($expected_tags, $block_tags);
+    $additional_tags = [
+      'node_list',
+      'rendered',
+    ];
+    $expected_tags = Cache::mergeTags($expected_tags, $additional_tags);
 
     $this->assertCacheTags($expected_tags);
-    $this->assertCacheContexts(['languages:language_interface', 'theme', 'url.query_args:' . MainContentViewSubscriber::WRAPPER_FORMAT, 'url.query_args.pagers:0', 'user', 'user.node_grants:view']);
+    $this->assertCacheContexts(['languages:language_interface', 'route.name', 'theme', 'url.query_args:' . MainContentViewSubscriber::WRAPPER_FORMAT, 'url.query_args.pagers:0', 'user', 'user.node_grants:view']);
 
     $this->assertLink($my_published->label());
     $this->assertNoLink($unpublished->label());
diff --git a/core/modules/update/src/Tests/UpdateCoreTest.php b/core/modules/update/src/Tests/UpdateCoreTest.php
index aef7c5e..b105780 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('local_actions_block');
   }
 
   /**
diff --git a/core/modules/user/src/Tests/UserRoleAdminTest.php b/core/modules/user/src/Tests/UserRoleAdminTest.php
index 455d6f7..a01c01e 100644
--- a/core/modules/user/src/Tests/UserRoleAdminTest.php
+++ b/core/modules/user/src/Tests/UserRoleAdminTest.php
@@ -25,9 +25,20 @@ class UserRoleAdminTest extends WebTestBase {
    */
   protected $adminUser;
 
+  /**
+   * Modules to enable.
+   *
+   * @var string[]
+   */
+  public static $modules = ['block'];
+
+  /**
+   * {@inheritdoc}
+   */
   protected function setUp() {
     parent::setUp();
     $this->adminUser = $this->drupalCreateUser(array('administer permissions', 'administer users'));
+    $this->drupalPlaceBlock('local_tasks_block');
   }
 
   /**
diff --git a/core/modules/views/src/Tests/Plugin/DisplayPageWebTest.php b/core/modules/views/src/Tests/Plugin/DisplayPageWebTest.php
index be85795..8bc8bc3 100644
--- a/core/modules/views/src/Tests/Plugin/DisplayPageWebTest.php
+++ b/core/modules/views/src/Tests/Plugin/DisplayPageWebTest.php
@@ -33,10 +33,14 @@ class DisplayPageWebTest extends PluginTestBase {
    */
   public static $modules = ['menu_ui', 'block', 'views_ui'];
 
+  /**
+   * {@inheritdoc}
+   */
   protected function setUp() {
     parent::setUp();
 
     $this->enableViewsTestModule();
+    $this->drupalPlaceBlock('local_tasks_block');
   }
 
   /**
@@ -53,7 +57,7 @@ public function testArguments() {
 
     $this->drupalGet('test_route_with_argument/1');
     $this->assertResponse(200);
-    $this->assertCacheContexts(['languages:language_interface', 'theme', 'url']);
+    $this->assertCacheContexts(['languages:language_interface', 'route.name', 'theme', 'url']);
     $result = $this->xpath('//span[@class="field-content"]');
     $this->assertEqual(count($result), 1, 'Ensure that just the filtered entry was returned.');
     $this->assertEqual((string) $result[0], 1, 'The passed ID was returned.');
diff --git a/core/modules/views/src/Tests/Wizard/WizardTestBase.php b/core/modules/views/src/Tests/Wizard/WizardTestBase.php
index f610a5f..7d8d9c0 100644
--- a/core/modules/views/src/Tests/Wizard/WizardTestBase.php
+++ b/core/modules/views/src/Tests/Wizard/WizardTestBase.php
@@ -27,6 +27,7 @@ protected function setUp() {
     // Create and log in a user with administer views permission.
     $views_admin = $this->drupalCreateUser(array('administer views', 'administer blocks', 'bypass node access', 'access user profiles', 'view all revisions'));
     $this->drupalLogin($views_admin);
+    $this->drupalPlaceBlock('local_actions_block');
   }
 
 }
diff --git a/core/modules/views_ui/src/Tests/SettingsTest.php b/core/modules/views_ui/src/Tests/SettingsTest.php
index 262fc7a..f2df1ee 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('local_tasks_block');
+  }
+
+  /**
    * Tests the settings for the edit ui.
    */
   function testEditUI() {
diff --git a/core/modules/views_ui/src/Tests/ViewsListTest.php b/core/modules/views_ui/src/Tests/ViewsListTest.php
index cc49bfd..4fcf223 100644
--- a/core/modules/views_ui/src/Tests/ViewsListTest.php
+++ b/core/modules/views_ui/src/Tests/ViewsListTest.php
@@ -23,19 +23,35 @@ class ViewsListTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('views_ui');
+  public static $modules = array('block', 'views_ui');
+
+  /**
+   * A user with permission to administer views.
+   *
+   * @var \Drupal\user\Entity\User
+   */
+  protected $adminUser;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+
+    $this->drupalPlaceBlock('local_tasks_block');
+    $this->drupalPlaceBlock('local_actions_block');
+    $this->adminUser = $this->drupalCreateUser(['administer views']);
+    $this->drupalLogin($this->adminUser);
+  }
 
   /**
    * Tests that the views list does not use a pager.
    */
   public function testViewsListLimit() {
-    // Login.
-    $user = $this->createUser(['administer views']);
-    $this->drupalLogin($user);
-
     // Check if we can access the main views admin page.
     $this->drupalGet('admin/structure/views');
-    $this->assertText(t('Add new view'));
+    $this->assertResponse(200);
+    $this->assertLink(t('Add new view'));
 
     // Count default views to be subtracted from the limit.
     $views = count(Views::getEnabledViews());
diff --git a/core/profiles/minimal/config/install/block.block.stark_local_actions.yml b/core/profiles/minimal/config/install/block.block.stark_local_actions.yml
new file mode 100644
index 0000000..f2dd88b
--- /dev/null
+++ b/core/profiles/minimal/config/install/block.block.stark_local_actions.yml
@@ -0,0 +1,15 @@
+id: stark_local_actions
+theme: stark
+weight: -10
+status: true
+langcode: en
+region: content
+plugin: local_actions_block
+settings:
+  id: local_actions_block
+  label: Primary admin actions
+  label_display: '0'
+dependencies:
+  theme:
+    - stark
+visibility: {  }
diff --git a/core/profiles/minimal/config/install/block.block.stark_local_tasks.yml b/core/profiles/minimal/config/install/block.block.stark_local_tasks.yml
new file mode 100644
index 0000000..2d0c5dc
--- /dev/null
+++ b/core/profiles/minimal/config/install/block.block.stark_local_tasks.yml
@@ -0,0 +1,15 @@
+id: stark_local_tasks
+theme: stark
+weight: -20
+status: true
+langcode: en
+region: content
+plugin: local_tasks_block
+settings:
+  id: local_tasks_block
+  label: Tabs
+  label_display: '0'
+dependencies:
+  theme:
+    - stark
+visibility: {  }
diff --git a/core/profiles/standard/config/install/block.block.bartik_help.yml b/core/profiles/standard/config/install/block.block.bartik_help.yml
index 88c4f1a..e93a546 100644
--- a/core/profiles/standard/config/install/block.block.bartik_help.yml
+++ b/core/profiles/standard/config/install/block.block.bartik_help.yml
@@ -1,9 +1,9 @@
 id: bartik_help
 theme: bartik
-weight: 0
+weight: -30
 status: true
 langcode: en
-region: help
+region: content
 plugin: help_block
 settings:
   id: help_block
diff --git a/core/profiles/standard/config/install/block.block.bartik_local_actions.yml b/core/profiles/standard/config/install/block.block.bartik_local_actions.yml
new file mode 100644
index 0000000..c88b8753
--- /dev/null
+++ b/core/profiles/standard/config/install/block.block.bartik_local_actions.yml
@@ -0,0 +1,15 @@
+id: bartik_local_actions
+theme: bartik
+weight: -20
+status: true
+langcode: en
+region: content
+plugin: local_actions_block
+settings:
+  id: local_actions_block
+  label: Primary admin actions
+  label_display: '0'
+dependencies:
+  theme:
+    - bartik
+visibility: {  }
diff --git a/core/profiles/standard/config/install/block.block.bartik_local_tasks.yml b/core/profiles/standard/config/install/block.block.bartik_local_tasks.yml
new file mode 100644
index 0000000..1cf88fe
--- /dev/null
+++ b/core/profiles/standard/config/install/block.block.bartik_local_tasks.yml
@@ -0,0 +1,15 @@
+id: bartik_local_tasks
+theme: bartik
+weight: -40
+status: true
+langcode: en
+region: content
+plugin: local_tasks_block
+settings:
+  id: local_tasks_block
+  label: Tabs
+  label_display: '0'
+dependencies:
+  theme:
+    - bartik
+visibility: {  }
diff --git a/core/profiles/standard/config/install/block.block.seven_local_actions.yml b/core/profiles/standard/config/install/block.block.seven_local_actions.yml
new file mode 100644
index 0000000..999807f
--- /dev/null
+++ b/core/profiles/standard/config/install/block.block.seven_local_actions.yml
@@ -0,0 +1,15 @@
+id: seven_local_actions
+theme: seven
+weight: -10
+status: true
+langcode: en
+region: content
+plugin: local_actions_block
+settings:
+  id: local_actions_block
+  label: Primary admin actions
+  label_display: '0'
+dependencies:
+  theme:
+    - seven
+visibility: {  }
diff --git a/core/profiles/standard/config/install/block.block.seven_primary_local_tasks.yml b/core/profiles/standard/config/install/block.block.seven_primary_local_tasks.yml
new file mode 100644
index 0000000..66e8d7b
--- /dev/null
+++ b/core/profiles/standard/config/install/block.block.seven_primary_local_tasks.yml
@@ -0,0 +1,17 @@
+id: seven_primary_local_tasks
+theme: seven
+weight: 0
+status: true
+langcode: en
+region: header
+plugin: local_tasks_block
+settings:
+  id: local_tasks_block
+  label: Primary tabs
+  label_display: '0'
+  primary: true
+  secondary: false
+dependencies:
+  theme:
+    - seven
+visibility: {  }
diff --git a/core/profiles/standard/config/install/block.block.seven_secondary_local_tasks.yml b/core/profiles/standard/config/install/block.block.seven_secondary_local_tasks.yml
new file mode 100644
index 0000000..7824d64
--- /dev/null
+++ b/core/profiles/standard/config/install/block.block.seven_secondary_local_tasks.yml
@@ -0,0 +1,17 @@
+id: seven_secondary_local_tasks
+theme: seven
+weight: 0
+status: true
+langcode: en
+region: pre_content
+plugin: local_tasks_block
+settings:
+  id: local_tasks_block
+  label: Secondary tabs
+  label_display: '0'
+  primary: false
+  secondary: true
+dependencies:
+  theme:
+    - seven
+visibility: {  }
diff --git a/core/tests/Drupal/Tests/Core/Menu/LocalActionManagerTest.php b/core/tests/Drupal/Tests/Core/Menu/LocalActionManagerTest.php
index 85731c7..24a09f2 100644
--- a/core/tests/Drupal/Tests/Core/Menu/LocalActionManagerTest.php
+++ b/core/tests/Drupal/Tests/Core/Menu/LocalActionManagerTest.php
@@ -10,6 +10,8 @@
 use Drupal\Component\Plugin\Discovery\DiscoveryInterface;
 use Drupal\Component\Plugin\Factory\FactoryInterface;
 use Drupal\Core\Access\AccessManagerInterface;
+use Drupal\Core\Access\AccessResult;
+use Drupal\Core\Access\AccessResultForbidden;
 use Drupal\Core\Cache\CacheBackendInterface;
 use Drupal\Core\Extension\ModuleHandlerInterface;
 use Drupal\Core\Language\Language;
@@ -109,10 +111,11 @@ protected function setUp() {
     $this->moduleHandler = $this->getMock('Drupal\Core\Extension\ModuleHandlerInterface');
     $this->cacheBackend = $this->getMock('Drupal\Core\Cache\CacheBackendInterface');
 
+    $access_result = new AccessResultForbidden();
     $this->accessManager = $this->getMock('Drupal\Core\Access\AccessManagerInterface');
     $this->accessManager->expects($this->any())
       ->method('checkNamedRoute')
-      ->will($this->returnValue(FALSE));
+      ->willReturn($access_result);
     $this->account = $this->getMock('Drupal\Core\Session\AccountInterface');
     $this->discovery = $this->getMock('Drupal\Component\Plugin\Discovery\DiscoveryInterface');
     $this->factory = $this->getMock('Drupal\Component\Plugin\Factory\FactoryInterface');
@@ -202,7 +205,7 @@ public function getActionsForRouteProvider() {
             'url' => Url::fromRoute('test_route_2'),
             'localized_options' => '',
           ),
-          '#access' => FALSE,
+          '#access' => AccessResult::forbidden(),
           '#weight' => 0,
         ),
       ),
@@ -236,7 +239,7 @@ public function getActionsForRouteProvider() {
             'url' => Url::fromRoute('test_route_2'),
             'localized_options' => '',
           ),
-          '#access' => FALSE,
+          '#access' => AccessResult::forbidden(),
           '#weight' => 0,
         ),
       ),
@@ -271,7 +274,7 @@ public function getActionsForRouteProvider() {
             'url' => Url::fromRoute('test_route_2'),
             'localized_options' => '',
           ),
-          '#access' => FALSE,
+          '#access' => AccessResult::forbidden(),
           '#weight' => 1,
         ),
         'plugin_id_2' => array(
@@ -281,7 +284,7 @@ public function getActionsForRouteProvider() {
             'url' => Url::fromRoute('test_route_3'),
             'localized_options' => '',
           ),
-          '#access' => FALSE,
+          '#access' => AccessResult::forbidden(),
           '#weight' => 0,
         ),
       ),
@@ -318,7 +321,7 @@ public function getActionsForRouteProvider() {
             'url' => Url::fromRoute('test_route_2', ['test1']),
             'localized_options' => '',
           ),
-          '#access' => FALSE,
+          '#access' => AccessResult::forbidden(),
           '#weight' => 1,
         ),
         'plugin_id_2' => array(
@@ -328,7 +331,7 @@ public function getActionsForRouteProvider() {
             'url' => Url::fromRoute('test_route_2', ['test2']),
             'localized_options' => '',
           ),
-          '#access' => FALSE,
+          '#access' => AccessResult::forbidden(),
           '#weight' => 0,
         ),
       ),
diff --git a/core/themes/bartik/bartik.info.yml b/core/themes/bartik/bartik.info.yml
index 308afbf..8b52f48 100644
--- a/core/themes/bartik/bartik.info.yml
+++ b/core/themes/bartik/bartik.info.yml
@@ -17,7 +17,6 @@ regions:
   header: Header
   primary_menu: 'Primary menu'
   secondary_menu: 'Secondary menu'
-  help: Help
   page_top: 'Page top'
   page_bottom: 'Page bottom'
   highlighted: Highlighted
diff --git a/core/themes/bartik/bartik.libraries.yml b/core/themes/bartik/bartik.libraries.yml
index 9c1a33c..bb49f7e 100644
--- a/core/themes/bartik/bartik.libraries.yml
+++ b/core/themes/bartik/bartik.libraries.yml
@@ -19,7 +19,7 @@ global-styling:
       css/components/form.css: {}
       css/components/forum.css: {}
       css/components/header.css: {}
-      css/components/region-help.css: {}
+      css/components/help.css: {}
       css/components/item-list.css: {}
       css/components/list-group.css: {}
       css/components/list.css: {}
diff --git a/core/themes/bartik/css/components/help.css b/core/themes/bartik/css/components/help.css
new file mode 100644
index 0000000..c606992
--- /dev/null
+++ b/core/themes/bartik/css/components/help.css
@@ -0,0 +1,10 @@
+/**
+ * @file
+ * Styles for the help block.
+ */
+
+.block-help {
+  border: 1px solid #d3d7d9;
+  padding: 0 1.5em;
+  margin-bottom: 30px;
+}
diff --git a/core/themes/bartik/css/components/region-help.css b/core/themes/bartik/css/components/region-help.css
deleted file mode 100644
index 3c16b0d..0000000
--- a/core/themes/bartik/css/components/region-help.css
+++ /dev/null
@@ -1,10 +0,0 @@
-/**
- * @file
- * Styles for the help region.
- */
-
-.region-help {
-  border: 1px solid #d3d7d9;
-  padding: 0 1.5em;
-  margin-bottom: 30px;
-}
diff --git a/core/themes/bartik/templates/page.html.twig b/core/themes/bartik/templates/page.html.twig
index b5d9c08..4c27d8f 100644
--- a/core/themes/bartik/templates/page.html.twig
+++ b/core/themes/bartik/templates/page.html.twig
@@ -38,10 +38,6 @@
  * - title: The page title, for use in the actual content.
  * - title_suffix: Additional output populated by modules, intended to be
  *   displayed after the main title tag that appears in the template.
- * - tabs: Tabs linking to any sub-pages beneath the current page (e.g., the
- *   view and edit tabs when displaying a node).
- * - action_links: Actions local to the page, such as "Add menu" on the menu
- *   administration interface.
  * - node: Fully loaded node, if there is an automatically-loaded node
  *   associated with the page and the node ID is the second argument in the
  *   page's path (e.g. node/12345 and node/12345/revisions, but not
@@ -53,7 +49,6 @@
  * - page.primary_menu: Items for the primary menu region.
  * - page.secondary_menu: Items for the secondary menu region.
  * - page.featured_top: Items for the featured top region.
- * - page.help: Dynamic help text, mostly for admin pages.
  * - page.content: The main content of the current page.
  * - page.sidebar_first: Items for the first sidebar.
  * - page.sidebar_second: Items for the second sidebar.
@@ -136,15 +131,6 @@
               </h1>
             {% endif %}
             {{ title_suffix }}
-            {% if tabs %}
-              <nav class="tabs" role="navigation" aria-label="{{ 'Tabs'|t }}">
-                {{ tabs }}
-              </nav>
-            {% endif %}
-            {{ page.help }}
-            {% if action_links %}
-              <ul class="action-links">{{ action_links }}</ul>
-            {% endif %}
             {{ page.content }}
           </section>
         </main>
diff --git a/core/themes/classy/templates/block/block--local-actions-block.html.twig b/core/themes/classy/templates/block/block--local-actions-block.html.twig
new file mode 100644
index 0000000..2a0f5c4
--- /dev/null
+++ b/core/themes/classy/templates/block/block--local-actions-block.html.twig
@@ -0,0 +1,12 @@
+{% extends "@block/block.html.twig" %}
+{#
+/**
+ * @file
+ * Theme override for local actions (primary admin actions.)
+ */
+#}
+{% block content %}
+  {% if content %}
+    <nav class="action-links">{{ content }}</nav>
+  {% endif %}
+{% endblock %}
diff --git a/core/themes/classy/templates/block/block--local-tasks-block.html.twig b/core/themes/classy/templates/block/block--local-tasks-block.html.twig
new file mode 100644
index 0000000..a191c60
--- /dev/null
+++ b/core/themes/classy/templates/block/block--local-tasks-block.html.twig
@@ -0,0 +1,14 @@
+{% extends "@block/block.html.twig" %}
+{#
+/**
+ * @file
+ * Theme override for tabs.
+ */
+#}
+{% block content %}
+  {% if content %}
+    <nav class="tabs" role="navigation" aria-label="{{ 'Tabs'|t }}">
+      {{ content }}
+    </nav>
+  {% endif %}
+{% endblock %}
diff --git a/core/themes/classy/templates/layout/page.html.twig b/core/themes/classy/templates/layout/page.html.twig
index 57533c8..8c81950 100644
--- a/core/themes/classy/templates/layout/page.html.twig
+++ b/core/themes/classy/templates/layout/page.html.twig
@@ -31,10 +31,6 @@
  * - title: The page title, for use in the actual content.
  * - title_suffix: Additional output populated by modules, intended to be
  *   displayed after the main title tag that appears in the template.
- * - tabs: Tabs linking to any sub-pages beneath the current page (e.g., the
- *   view and edit tabs when displaying a node).
- * - action_links: Actions local to the page, such as "Add menu" on the menu
- *   administration interface.
  * - node: Fully loaded node, if there is an automatically-loaded node
  *   associated with the page and the node ID is the second argument in the
  *   page's path (e.g. node/12345 and node/12345/revisions, but not
@@ -109,13 +105,6 @@
         <h1>{{ title }}</h1>
       {% endif %}
       {{ title_suffix }}
-
-      {{ tabs }}
-
-      {% if action_links %}
-        <nav class="action-links">{{ action_links }}</nav>
-      {% endif %}
-
       {{ page.content }}
     </div>{# /.layout-content #}
 
diff --git a/core/themes/seven/seven.info.yml b/core/themes/seven/seven.info.yml
index 99a3ec1..1427896 100644
--- a/core/themes/seven/seven.info.yml
+++ b/core/themes/seven/seven.info.yml
@@ -14,12 +14,14 @@ stylesheets-remove:
 quickedit_stylesheets:
   - css/components/quickedit.css
 regions:
-  content: Content
+  header: 'Header'
+  pre_content: 'Pre-content'
+  breadcrumb: Breadcrumb
   highlighted: Highlighted
   help: Help
+  content: Content
   page_top: 'Page top'
   page_bottom: 'Page bottom'
   sidebar_first: 'First sidebar'
-  breadcrumb: Breadcrumb
 regions_hidden:
   - sidebar_first
diff --git a/core/themes/seven/seven.theme b/core/themes/seven/seven.theme
index 930b7d0..1a44bc4 100644
--- a/core/themes/seven/seven.theme
+++ b/core/themes/seven/seven.theme
@@ -24,18 +24,6 @@ function seven_preprocess_html(&$variables) {
 }
 
 /**
- * Implements hook_preprocess_HOOK() for page templates.
- */
-function seven_preprocess_page(&$variables) {
-  $variables['primary_local_tasks'] = $variables['tabs'];
-  unset($variables['primary_local_tasks']['#secondary']);
-  $variables['secondary_local_tasks'] = array(
-    '#theme' => 'menu_local_tasks',
-    '#secondary' => isset($variables['tabs']['#secondary']) ? $variables['tabs']['#secondary'] : '',
-  );
-}
-
-/**
  * Implements hook_pre_render_HOOK() for menu-local-tasks templates.
  *
  * Use preprocess hook to set #attached to child elements
diff --git a/core/themes/seven/templates/block--local-actions-block.html.twig b/core/themes/seven/templates/block--local-actions-block.html.twig
new file mode 100644
index 0000000..6539758
--- /dev/null
+++ b/core/themes/seven/templates/block--local-actions-block.html.twig
@@ -0,0 +1,14 @@
+{% extends "@block/block.html.twig" %}
+{#
+/**
+ * @file
+ * Theme override for local actions (primary admin actions.)
+ */
+#}
+{% block content %}
+  {% if content %}
+    <ul class="action-links">
+      {{ content }}
+    </ul>
+  {% endif %}
+{% endblock %}
diff --git a/core/themes/seven/templates/page.html.twig b/core/themes/seven/templates/page.html.twig
index 1c36be5..ac26a51 100644
--- a/core/themes/seven/templates/page.html.twig
+++ b/core/themes/seven/templates/page.html.twig
@@ -32,24 +32,18 @@
  * - title: The page title, for use in the actual content.
  * - title_suffix: Additional output populated by modules, intended to be
  *   displayed after the main title tag that appears in the template.
- * - tabs: Tabs linking to any sub-pages beneath the current page (e.g., the
- *   view and edit tabs when displaying a node).
- * - action_links: Actions local to the page, such as "Add menu" on the menu
- *   administration interface.
  * - node: Fully loaded node, if there is an automatically-loaded node
  *   associated with the page and the node ID is the second argument in the
  *   page's path (e.g. node/12345 and node/12345/revisions, but not
  *   comment/reply/12345).
  *
  * Regions:
- * - page.page_top: Items for the header region.
+ * - page.header: Items for the header region.
+ * - page.pre_content: Items for the pre-content region.
+ * - page.breadcrumb: Items for the breadcrumb region.
  * - page.highlighted: Items for the highlighted region.
  * - page.help: Dynamic help text, mostly for admin pages.
  * - page.content: The main content of the current page.
- * - page.sidebar_first: Items for the first sidebar.
- * - page.sidebar_second: Items for the second sidebar.
- * - page.page_bottom: Items for the footer region.
- * - page.breadcrumb: Items for the breadcrumb region.
  *
  * @see template_preprocess_page()
  * @see seven_preprocess_page()
@@ -63,19 +57,13 @@
         <h1 class="page-title">{{ title }}</h1>
       {% endif %}
       {{ title_suffix }}
-      {% if primary_local_tasks %}
-        {{ primary_local_tasks }}
-      {% endif %}
+      {{ page.header }}
     </div>
   </header>
 
   <div class="layout-container">
-    {% if secondary_local_tasks %}
-      <div class="tabs-secondary clearfix" role="navigation">{{ secondary_local_tasks }}</div>
-    {% endif %}
-
+    {{ page.pre_content }}
     {{ page.breadcrumb }}
-
     <main class="page-content clearfix" role="main">
       <div class="visually-hidden"><a id="main-content" tabindex="-1"></a></div>
       {{ page.highlighted }}
@@ -84,11 +72,6 @@
           {{ page.help }}
         </div>
       {% endif %}
-      {% if action_links %}
-        <ul class="action-links">
-          {{ action_links }}
-        </ul>
-      {% endif %}
       {{ page.content }}
     </main>