diff --git a/tests/build_exe.py b/tests/build_exe.py
index cd82db9..8e0aac0 100644
--- a/tests/build_exe.py
+++ b/tests/build_exe.py
@@ -29,6 +29,7 @@ def base64_to_image(base64_string, image_path):
 
 
 code = """
+# -*- coding:utf-8 -*-
 from pywxdump.cli import console_run
 console_run()
 """