diff --git a/core/modules/action/tests/Drupal/action/Tests/Menu/ActionLocalTasksTest.php b/core/modules/action/tests/Drupal/action/Tests/Menu/ActionLocalTasksTest.php
index a9b380f..891db5b 100644
--- a/core/modules/action/tests/Drupal/action/Tests/Menu/ActionLocalTasksTest.php
+++ b/core/modules/action/tests/Drupal/action/Tests/Menu/ActionLocalTasksTest.php
@@ -26,7 +26,7 @@ public static function getInfo() {
   }
 
   public function setUp() {
-    $this->moduleList = array('action' => 'core/modules/action/action.info');
+    $this->moduleList = array('action' => 'core/modules/action/action.info.yml');
     parent::setUp();
   }
 
diff --git a/core/modules/aggregator/tests/Drupal/aggregator/Tests/Menu/AggregatorLocalTasksTest.php b/core/modules/aggregator/tests/Drupal/aggregator/Tests/Menu/AggregatorLocalTasksTest.php
index 95d551b..67bedd8 100644
--- a/core/modules/aggregator/tests/Drupal/aggregator/Tests/Menu/AggregatorLocalTasksTest.php
+++ b/core/modules/aggregator/tests/Drupal/aggregator/Tests/Menu/AggregatorLocalTasksTest.php
@@ -26,7 +26,7 @@ public static function getInfo() {
   }
 
   public function setUp() {
-    $this->moduleList = array('aggregator' => 'core/modules/aggregator/aggregator.info');
+    $this->moduleList = array('aggregator' => 'core/modules/aggregator/aggregator.info.yml');
     parent::setUp();
   }
 
diff --git a/core/modules/block/custom_block/tests/Drupal/custom_blocks/Tests/Menu/CustomBlockLocalTasksTest.php b/core/modules/block/custom_block/tests/Drupal/custom_blocks/Tests/Menu/CustomBlockLocalTasksTest.php
index ab22751..96866fd 100644
--- a/core/modules/block/custom_block/tests/Drupal/custom_blocks/Tests/Menu/CustomBlockLocalTasksTest.php
+++ b/core/modules/block/custom_block/tests/Drupal/custom_blocks/Tests/Menu/CustomBlockLocalTasksTest.php
@@ -27,8 +27,8 @@ public static function getInfo() {
 
   public function setUp() {
     $this->moduleList = array(
-      'block' => 'core/modules/block/block.info',
-      'custom_block' => 'core/modules/block/custom_block/custom_block.info',
+      'block' => 'core/modules/block/block.info.yml',
+      'custom_block' => 'core/modules/block/custom_block/custom_block.info.yml',
     );
     parent::setUp();
   }
diff --git a/core/modules/block/tests/Drupal/block/Tests/Menu/BlockLocalTasksTest.php b/core/modules/block/tests/Drupal/block/Tests/Menu/BlockLocalTasksTest.php
index 0c221da..59b26f8 100644
--- a/core/modules/block/tests/Drupal/block/Tests/Menu/BlockLocalTasksTest.php
+++ b/core/modules/block/tests/Drupal/block/Tests/Menu/BlockLocalTasksTest.php
@@ -26,7 +26,7 @@ public static function getInfo() {
   }
 
   public function setUp() {
-    $this->moduleList = array('block' => 'core/modules/block/block.info');
+    $this->moduleList = array('block' => 'core/modules/block/block.info.yml');
     parent::setUp();
 
     $config_factory = $this->getConfigFactoryStub(array('system.theme' => array(
diff --git a/core/modules/book/tests/Drupal/book/Tests/Menu/BookLocalTasksTest.php b/core/modules/book/tests/Drupal/book/Tests/Menu/BookLocalTasksTest.php
index 83bae97..2f8d749 100644
--- a/core/modules/book/tests/Drupal/book/Tests/Menu/BookLocalTasksTest.php
+++ b/core/modules/book/tests/Drupal/book/Tests/Menu/BookLocalTasksTest.php
@@ -27,8 +27,8 @@ public static function getInfo() {
 
   public function setUp() {
     $this->moduleList = array(
-      'book' => 'core/modules/book/book.info',
-      'node' => 'core/modules/node/node.info',
+      'book' => 'core/modules/book/book.info.yml',
+      'node' => 'core/modules/node/node.info.yml',
     );
     parent::setUp();
   }
diff --git a/core/modules/content_translation/lib/Drupal/content_translation/Plugin/Derivative/ContentTranslationLocalTasks.php b/core/modules/content_translation/lib/Drupal/content_translation/Plugin/Derivative/ContentTranslationLocalTasks.php
index 7325a68..558bdfd 100644
--- a/core/modules/content_translation/lib/Drupal/content_translation/Plugin/Derivative/ContentTranslationLocalTasks.php
+++ b/core/modules/content_translation/lib/Drupal/content_translation/Plugin/Derivative/ContentTranslationLocalTasks.php
@@ -84,7 +84,6 @@ public function getDerivativeDefinitions(array $base_plugin_definition) {
         $this->derivatives[$translation_tab]['route_name'] = $translation_route_name;
       }
     }
-    debug($this->derivatives);
     return parent::getDerivativeDefinitions($base_plugin_definition);
   }
 
@@ -107,7 +106,6 @@ public function alterLocalTasks(array &$local_tasks) {
         }
       }
     }
-    debug($local_tasks);
   }
 
   /**
diff --git a/core/modules/content_translation/tests/Drupal/content_translation/Tests/Menu/ContentTranslationLocalTasksTest.php b/core/modules/content_translation/tests/Drupal/content_translation/Tests/Menu/ContentTranslationLocalTasksTest.php
index de463e6..cde6985 100644
--- a/core/modules/content_translation/tests/Drupal/content_translation/Tests/Menu/ContentTranslationLocalTasksTest.php
+++ b/core/modules/content_translation/tests/Drupal/content_translation/Tests/Menu/ContentTranslationLocalTasksTest.php
@@ -27,8 +27,8 @@ public static function getInfo() {
 
   public function setUp() {
     $this->moduleList = array(
-      'content_translation' => 'core/modules/content_translation/content_translation.info',
-      'node' => 'core/modules/node/node.info',
+      'content_translation' => 'core/modules/content_translation/content_translation.info.yml',
+      'node' => 'core/modules/node/node.info.yml',
     );
     parent::setUp();
 
@@ -59,22 +59,21 @@ public function setUp() {
     $collection->expects($this->any())
       ->method('all')
       ->will($this->returnValue(array('node.view' => array())));
-    $route_provider = $this->getMockBuilder('Drupal\Core\Routing\RouteProvider')
-      ->disableOriginalConstructor()
-      ->getMock();
+    $route_provider = $this->getMock('Drupal\Core\Routing\RouteProviderInterface');
     $route_provider->expects($this->any())
       ->method('getRoutesByPattern')
       ->will($this->returnValue($collection));
     \Drupal::getContainer()->set('router.route_provider', $route_provider);
 
     // Stub for t().
-    $string_translation = $this->getMockBuilder('Drupal\Core\StringTranslation\TranslationManager')
-      ->disableOriginalConstructor()
-      ->getMock();
+    $string_translation = $this->getMock('Drupal\Core\StringTranslation\TranslationInterface');
     $string_translation->expects($this->any())
       ->method('translate')
       ->will($this->returnCallback(function($string) {return $string;}));
     \Drupal::getContainer()->set('string_translation', $string_translation);
+
+    // Load the content_translation.module file in order to run the alter hook.
+    require_once DRUPAL_ROOT . '/core/modules/content_translation/content_translation.module';
   }
 
   /**
diff --git a/core/modules/locale/tests/Drupal/locale/Tests/Menu/LocaleLocalTasksTest.php b/core/modules/locale/tests/Drupal/locale/Tests/Menu/LocaleLocalTasksTest.php
index fcfa785..4c18831 100644
--- a/core/modules/locale/tests/Drupal/locale/Tests/Menu/LocaleLocalTasksTest.php
+++ b/core/modules/locale/tests/Drupal/locale/Tests/Menu/LocaleLocalTasksTest.php
@@ -27,7 +27,7 @@ public static function getInfo() {
 
   public function setUp() {
     $this->moduleList = array(
-      'locale' => 'core/modules/locale/locale.info',
+      'locale' => 'core/modules/locale/locale.info.yml',
     );
     parent::setUp();
   }
diff --git a/core/modules/shortcut/tests/Drupal/shortcut/Tests/Menu/ShortcutLocalTasksTest.php b/core/modules/shortcut/tests/Drupal/shortcut/Tests/Menu/ShortcutLocalTasksTest.php
index 71943ad..ff8bd7e 100644
--- a/core/modules/shortcut/tests/Drupal/shortcut/Tests/Menu/ShortcutLocalTasksTest.php
+++ b/core/modules/shortcut/tests/Drupal/shortcut/Tests/Menu/ShortcutLocalTasksTest.php
@@ -27,8 +27,8 @@ public static function getInfo() {
 
   public function setUp() {
     $this->moduleList = array(
-      'shortcut' => 'core/modules/shortcut/shortcut.info',
-      'user' => 'core/modules/user/user.info',
+      'shortcut' => 'core/modules/shortcut/shortcut.info.yml',
+      'user' => 'core/modules/user/user.info.yml',
     );
     parent::setUp();
   }
diff --git a/core/modules/user/tests/Drupal/user/Tests/Menu/UserLocalTasksTest.php b/core/modules/user/tests/Drupal/user/Tests/Menu/UserLocalTasksTest.php
index ae2637e..a978178 100644
--- a/core/modules/user/tests/Drupal/user/Tests/Menu/UserLocalTasksTest.php
+++ b/core/modules/user/tests/Drupal/user/Tests/Menu/UserLocalTasksTest.php
@@ -26,7 +26,7 @@ public static function getInfo() {
   }
 
   public function setUp() {
-    $this->moduleList = array('user' => 'core/modules/user/user.info');
+    $this->moduleList = array('user' => 'core/modules/user/user.info.yml');
     parent::setUp();
   }
 
diff --git a/core/tests/Drupal/Tests/Core/Menu/LocalTaskIntegrationTest.php b/core/tests/Drupal/Tests/Core/Menu/LocalTaskIntegrationTest.php
index 705347e..61ee601 100644
--- a/core/tests/Drupal/Tests/Core/Menu/LocalTaskIntegrationTest.php
+++ b/core/tests/Drupal/Tests/Core/Menu/LocalTaskIntegrationTest.php
@@ -80,6 +80,10 @@ protected function getLocalTaskManager($modules, $route_name, $route_params) {
     $property->setAccessible(TRUE);
     $property->setValue($manager, $pluginDiscovery);
 
+    $method = new \ReflectionMethod('Drupal\Core\Menu\LocalTaskManager', 'alterInfo');
+    $method->setAccessible(TRUE);
+    $method->invoke($manager, $module_handler, 'local_tasks');
+
     $plugin_stub = $this->getMock('Drupal\Core\Menu\LocalTaskInterface');
     $factory = $this->getMock('Drupal\Component\Plugin\Factory\FactoryInterface');
     $factory->expects($this->any())