diff --git a/core/lib/Drupal/Component/Discovery/YamlDiscovery.php b/core/lib/Drupal/Component/Discovery/YamlDiscovery.php
index 4d00f44..1d147fd 100644
--- a/core/lib/Drupal/Component/Discovery/YamlDiscovery.php
+++ b/core/lib/Drupal/Component/Discovery/YamlDiscovery.php
@@ -50,7 +50,7 @@ public function findAll() {
     foreach ($this->findFiles() as $provider => $file) {
       // If a file is empty or its contents are commented out, return an empty
       // array instead of NULL for type consistency.
-      $all[$provider] = Yaml::decode(file_get_contents($file)) ?: array();
+      $all[$provider] = Yaml::decode(file_get_contents($file)) ?: [];
     }
 
     return $all;