diff --git a/tests/unit/Stubs/RestfulServerTestExceptionThrown.php b/tests/unit/Stubs/RestfulServerTestExceptionThrown.php
index a830d6a..1c7cc07 100644
--- a/tests/unit/Stubs/RestfulServerTestExceptionThrown.php
+++ b/tests/unit/Stubs/RestfulServerTestExceptionThrown.php
@@ -23,7 +23,7 @@ class RestfulServerTestExceptionThrown extends DataObject implements TestOnly
         'Title' => 'Text',
     );
 
-    public function onBeforeWrite()
+    protected function onBeforeWrite()
     {
         parent::onBeforeWrite();