diff --git a/ext/mbstring/tests/mbregex_stack_limit2.phpt b/ext/mbstring/tests/mbregex_stack_limit2.phpt
index 12c8c8edab2..8faa01565e9 100644
--- a/ext/mbstring/tests/mbregex_stack_limit2.phpt
+++ b/ext/mbstring/tests/mbregex_stack_limit2.phpt
@@ -1,7 +1,11 @@
 --TEST--
 Test oniguruma stack limit
 --SKIPIF--
-<?php extension_loaded('mbstring') or die('skip mbstring not available'); ?>
+<?php
+extension_loaded('mbstring') or die('skip mbstring not available');
+extension_loaded('iconv') or die('skip iconv not available');
+if (!function_exists('mb_ereg_replace')) die('skip mb_ereg_replace not available');
+?>
 --FILE--
 <?php
 function mb_trim( $string, $chars = "", $chars_array = array() )