diff --git a/Zend/tests/gh10251.phpt b/Zend/tests/gh10251.phpt
index eb942824802..da8d8767a36 100644
--- a/Zend/tests/gh10251.phpt
+++ b/Zend/tests/gh10251.phpt
@@ -2,6 +2,7 @@
 GH-10251 (Assertion `(flag & (1<<3)) == 0' failed.)
 --FILE--
 <?php
+#[\AllowDynamicProperties]
 class A
 {
     function __set($o, $l)