diff --git a/tests/common.php b/tests/common.php
index aae5ea7e..223a5bf1 100644
--- a/tests/common.php
+++ b/tests/common.php
@@ -86,7 +86,7 @@ require 'path2class.func.php';
  *
  */
 function htmlpurifier_parse_args(&$AC, $aliases) {
-    if (empty($_GET)) {
+    if (empty($_GET) && !empty($_SERVER['argv'])) {
         array_shift($_SERVER['argv']);
         $o = false;
         $bool = false;