diff --git a/tests.py b/tests.py
index 121bab3..d24f6d4 100644
--- a/tests.py
+++ b/tests.py
@@ -1,3 +1,6 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
 from __future__ import absolute_import, print_function, unicode_literals
 
 import os