diff --git a/run-tests.php b/run-tests.php
index e632f69a828..5a6ac531fc3 100755
--- a/run-tests.php
+++ b/run-tests.php
@@ -2473,12 +2473,9 @@ COMMAND $cmd
             save_text($test_clean, trim($section_text['CLEAN']), $temp_clean);
 
             if (!$no_clean) {
-                $clean_params = array();
-                settings2array($ini_overwrites, $clean_params);
-                $clean_params = settings2params($clean_params);
                 $extra = substr(PHP_OS, 0, 3) !== "WIN" ?
                     "unset REQUEST_METHOD; unset QUERY_STRING; unset PATH_TRANSLATED; unset SCRIPT_FILENAME; unset REQUEST_METHOD;" : "";
-                system_with_timeout("$extra $php $pass_options $extra_options -q $clean_params $no_file_cache \"$test_clean\"", $env);
+                system_with_timeout("$extra $php $pass_options $extra_options -q $orig_ini_settings $no_file_cache \"$test_clean\"", $env);
             }
 
             if (!$cfg['keep']['clean']) {