only in patch2:
unchanged:
--- a/core/tests/Drupal/Tests/Core/Menu/LocalTaskIntegrationTest.php
+++ b/core/tests/Drupal/Tests/Core/Menu/LocalTaskIntegrationTest.php
@@ -108,7 +108,7 @@ protected function getLocalTaskManager($module_dirs, $route_name, $route_params)
         return isset($module_dirs[$module]);
       }));
 
-    $pluginDiscovery = new YamlDiscovery('local_tasks', $module_dirs);
+    $pluginDiscovery = new YamlDiscovery('links.task', $module_dirs);
     $pluginDiscovery = new ContainerDerivativeDiscoveryDecorator($pluginDiscovery);
     $property = new \ReflectionProperty('Drupal\Core\Menu\LocalTaskManager', 'discovery');
     $property->setAccessible(TRUE);