diff --git a/tests/security/open_basedir_error_log.phpt b/tests/security/open_basedir_error_log.phpt
index 62bb5cada08..581dd3f57e4 100644
--- a/tests/security/open_basedir_error_log.phpt
+++ b/tests/security/open_basedir_error_log.phpt
@@ -2,6 +2,7 @@
 Test open_basedir configuration
 --INI--
 open_basedir=.
+error_log=
 --FILE--
 <?php
 require_once "open_basedir.inc";