diff --git a/core/lib/Drupal/Component/Plugin/Discovery/AnnotatedClassDiscovery.php b/core/lib/Drupal/Component/Plugin/Discovery/AnnotatedClassDiscovery.php
index 377bf4a..13f853d 100644
--- a/core/lib/Drupal/Component/Plugin/Discovery/AnnotatedClassDiscovery.php
+++ b/core/lib/Drupal/Component/Plugin/Discovery/AnnotatedClassDiscovery.php
@@ -78,6 +78,7 @@ public function getDefinitions() {
     $reader = new AnnotationReader();
     // Prevent @endlink from being parsed as an annotation.
     $reader->addGlobalIgnoredName('endlink');
+    $reader->addGlobalIgnoredName('file');
 
     // Register the namespaces of classes that can be used for annotations.
     AnnotationRegistry::registerAutoloadNamespaces($this->getAnnotationNamespaces());
diff --git a/core/modules/system/tests/modules/plugin_test/lib/Drupal/plugin_test/Plugin/plugin_test/fruit/NonAnnotatedClass.php b/core/modules/system/tests/modules/plugin_test/lib/Drupal/plugin_test/Plugin/plugin_test/fruit/NonAnnotatedClass.php
new file mode 100644
index 0000000..c4fa863
--- /dev/null
+++ b/core/modules/system/tests/modules/plugin_test/lib/Drupal/plugin_test/Plugin/plugin_test/fruit/NonAnnotatedClass.php
@@ -0,0 +1,10 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\plugin_test\Plugin\plugin_test\fruit\NonAnnotatedClass.
+ */
+
+namespace Drupal\plugin_test\Plugin\plugin_test\fruit;
+
+class NonAnnotatedClass {}