diff --git a/ext/zend_test/tests/observer_fiber_functions_03.phpt b/ext/zend_test/tests/observer_fiber_functions_03.phpt
index 3468120ef4b58..147e6f7229d49 100644
--- a/ext/zend_test/tests/observer_fiber_functions_03.phpt
+++ b/ext/zend_test/tests/observer_fiber_functions_03.phpt
@@ -10,6 +10,10 @@ zend_test.observer.fiber_init=1
 zend_test.observer.fiber_switch=1
 zend_test.observer.fiber_destroy=1
 memory_limit=100M
+--SKIPIF--
+<?php
+if (getenv("USE_ZEND_ALLOC") === "0") die("skip requires ZendMM because it uses the memory limit");
+?>
 --FILE--
 <?php