diff --git a/tests/runtests.py b/tests/runtests.py
index afa5663a..5eeb50c0 100755
--- a/tests/runtests.py
+++ b/tests/runtests.py
@@ -1,3 +1,4 @@
+#!/usr/bin/python
 # -*- coding: utf-8 -*-
 #
 # Copyright (C) 2007, TUBITAK/UEKAE