diff -u b/core/modules/file/src/Tests/FileFieldTestBase.php b/core/modules/file/src/Tests/FileFieldTestBase.php
--- b/core/modules/file/src/Tests/FileFieldTestBase.php
+++ b/core/modules/file/src/Tests/FileFieldTestBase.php
@@ -45,10 +45,8 @@
     // Get a file to upload.
     $file = current($this->drupalGetTestFiles($type_name, $size));
 
-    /**
-     * Add a filesize property to files as would be read by
-     * \Drupal\Core\Entity\EntityInterface::load().
-     */
+    // Add a filesize property to files as would be read by
+    // \Drupal\Core\Entity\EntityInterface::load().
     $file->filesize = filesize($file->uri);
 
     return entity_create('file', (array) $file);