diff -u b/core/tests/Drupal/KernelTests/Core/Image/ToolkitGdTest.php b/core/tests/Drupal/KernelTests/Core/Image/ToolkitGdTest.php
--- b/core/tests/Drupal/KernelTests/Core/Image/ToolkitGdTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Image/ToolkitGdTest.php
@@ -55,7 +55,7 @@
   }
 
   /**
-   * @requires function imagegd2()
+   * @requires function imagegd2
    */
 
     /**