MDL-10064 global $CFG in unit test files is non standard, it is recommended to use MOODLE_INTERNAL test in all library files

lib/simpletest/slowtestcode.php

@@ -8,10 +8,9 @@
  * @package SimpleTestEx
  */
 
-/** */
-require_once(dirname(__FILE__) . '/../../config.php');
-
-global $CFG;
+if (!defined('MOODLE_INTERNAL')) {
+    die('Direct access to this script is forbidden.');    ///  It must be included from a Moodle page
+}
 
 class slow_code_test extends UnitTestCase {
     var $php_code_extensions = array('php', 'html', 'php\.inc');