--- test/test_environ.py
+++ test/test_environ.py
@@ -640,7 +640,7 @@ def test_delete_cookie(self):
         response.delete_cookie('name')
         cookies = [value for name, value in response.headerlist
                    if name.title() == 'Set-Cookie']
-        self.assertTrue('name=;' in cookies[0])
+        self.assertTrue('Max-Age=-1' in cookies[0])
 
     def test_set_header(self):
         response = BaseResponse()