diff --git a/core/modules/entity_reference/src/Plugin/Type/SelectionPluginManager.php b/core/modules/entity_reference/src/Plugin/Type/SelectionPluginManager.php
index 6ca37c9..f5542b5 100644
--- a/core/modules/entity_reference/src/Plugin/Type/SelectionPluginManager.php
+++ b/core/modules/entity_reference/src/Plugin/Type/SelectionPluginManager.php
@@ -26,7 +26,7 @@ class SelectionPluginManager extends DefaultPluginManager {
   /**
    * {@inheritdoc}
    */
-  public function __construct(\Traversable $namespaces, CacheBackendInterface $cache_backend, LanguageManager $language_manager, ModuleHandlerInterface $module_handler) {
+  public function __construct(array $namespaces, CacheBackendInterface $cache_backend, LanguageManager $language_manager, ModuleHandlerInterface $module_handler) {
     $this->discovery = new AnnotatedClassDiscovery('Plugin/entity_reference/selection', $namespaces, 'Drupal\entity_reference\Annotation\EntityReferenceSelection');
 
     // We're not using the parent constructor because we use a different factory
diff --git a/core/modules/migrate/src/Plugin/MigrateDestinationPluginManager.php b/core/modules/migrate/src/Plugin/MigrateDestinationPluginManager.php
index 9e87795..43c6c46 100644
--- a/core/modules/migrate/src/Plugin/MigrateDestinationPluginManager.php
+++ b/core/modules/migrate/src/Plugin/MigrateDestinationPluginManager.php
@@ -34,7 +34,7 @@ class MigrateDestinationPluginManager extends MigratePluginManager {
   /**
    * {@inheritdoc}
    */
-  public function __construct($type, \Traversable $namespaces, CacheBackendInterface $cache_backend, LanguageManager $language_manager, ModuleHandlerInterface $module_handler, EntityManagerInterface $entity_manager, $annotation = 'Drupal\migrate\Annotation\MigrateDestination') {
+  public function __construct($type, array $namespaces, CacheBackendInterface $cache_backend, LanguageManager $language_manager, ModuleHandlerInterface $module_handler, EntityManagerInterface $entity_manager, $annotation = 'Drupal\migrate\Annotation\MigrateDestination') {
     parent::__construct($type, $namespaces, $cache_backend, $language_manager, $module_handler, $annotation);
     $this->entityManager = $entity_manager;
   }