diff --git a/public/lib/classes/check/environment/configrw.php b/public/lib/classes/check/environment/configrw.php
index 32d4221b693..448c68be302 100644
--- a/public/lib/classes/check/environment/configrw.php
+++ b/public/lib/classes/check/environment/configrw.php
@@ -14,6 +14,11 @@
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
+namespace core\check\environment;
+
+use core\check\check;
+use core\check\result;
+
 /**
  * Verifies config.php is not writable anymore after installation
  *
@@ -23,48 +28,32 @@
  * @copyright  2008 petr Skoda
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
-
-namespace core\check\environment;
-
-defined('MOODLE_INTERNAL') || die();
-
-use core\check\check;
-use core\check\result;
-
-/**
- * Verifies config.php is not writable anymore after installation
- *
- * @copyright  2020 Brendan Heywood <brendan@catalyst-au.net>
- * @copyright  2008 petr Skoda
- * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
-class configrw extends check {
-
-    /**
-     * Get the short check name
-     *
-     * @return string
-     */
+final class configrw extends check {
+    #[\Override]
     public function get_name(): string {
         return get_string('check_configrw_name', 'report_security');
     }
 
-    /**
-     * Return result
-     * @return result
-     */
+    #[\Override]
     public function get_result(): result {
         global $CFG;
         $details = get_string('check_configrw_details', 'report_security');
 
-        if (is_writable($CFG->dirroot . '/config.php')) {
-            $status = result::WARNING;
-            $summary = get_string('check_configrw_warning', 'report_security');
-        } else {
-            $status = result::OK;
-            $summary = get_string('check_configrw_ok', 'report_security');
+        $configfilepaths = [
+            "{$CFG->root}/config.php",
+            "{$CFG->dirroot}/config.php",
+        ];
+
+        foreach ($configfilepaths as $configfile) {
+            if (is_writable($configfile)) {
+                $status = result::WARNING;
+                $summary = get_string('check_configrw_warning', 'report_security');
+                return new result($status, $summary, $details);
+            }
         }
+
+        $status = result::OK;
+        $summary = get_string('check_configrw_ok', 'report_security');
         return new result($status, $summary, $details);
     }
 }
-