diff --git a/core/includes/menu.inc b/core/includes/menu.inc
index 3ba3b5d..e6c070e 100644
--- a/core/includes/menu.inc
+++ b/core/includes/menu.inc
@@ -1723,6 +1723,11 @@ function theme_menu_local_task($variables) {
     'localized_options' => array(),
   );
   $link_text = $link['title'];
+  if (!empty($link['description'])) {
+    $link['localized_options']['attributes']['title'] = check_plain(
+      $link['description']
+    );
+  }
 
   if (!empty($variables['element']['#active'])) {
     // Add text to indicate active tab for non-visual users.
diff --git a/core/modules/system/lib/Drupal/system/Tests/Menu/LocalTasksTest.php b/core/modules/system/lib/Drupal/system/Tests/Menu/LocalTasksTest.php
index 9366aef..7f7088a 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Menu/LocalTasksTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Menu/LocalTasksTest.php
@@ -112,6 +112,10 @@ function testLocalTasks() {
     ));
     $this->assertText('Show it');
     $this->assertText('Advanced settings');
+
+    // Verify the title attribute get's set correctly on a local task.
+    $this->drupalGet('menu-test/tasks/tasks/edit');
+    $this->assertRaw('Local task description', "Local task title attribute get's set correctly.");
   }
 
   /**
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 833d497..845dee4 100644
--- a/core/modules/system/tests/modules/menu_test/menu_test.module
+++ b/core/modules/system/tests/modules/menu_test/menu_test.module
@@ -262,6 +262,7 @@ function menu_test_menu() {
   ) + $base;
   $items['menu-test/tasks/tasks/edit'] = array(
     'title' => 'Edit',
+    'description' => 'Local task description',
     'type' => MENU_LOCAL_TASK,
   ) + $base;
   $items['menu-test/tasks/tasks/settings'] = array(