Index: flask-paranoid-0.3.0/tests/test_paranoid.py
===================================================================
--- flask-paranoid-0.3.0.orig/tests/test_paranoid.py
+++ flask-paranoid-0.3.0/tests/test_paranoid.py
@@ -1,12 +1,21 @@
 import sys
 import unittest
 
+import flask
 from flask import Flask
 from flask_paranoid import Paranoid
 
 
 class ParanoidTests(unittest.TestCase):
     def _delete_cookie(self, name, httponly=True):
+        flask_version = flask.__version__.split('.')
+        if int(flask_version[0]) < 2 or (int(flask_version[0]) == 2 and int(flask_version[1]) < 1):
+            httponly = False
+
+        if (sys.version_info.minor < 8):
+            return (name + '=; Expires=Thu, 01-Jan-1970 00:00:00 GMT; '
+                    f'Max-Age=0; {"HttpOnly; " if httponly else ""}Path=/')
+
         return (name + '=; Expires=Thu, 01 Jan 1970 00:00:00 GMT; '
                 f'Max-Age=0; {"HttpOnly; " if httponly else ""}Path=/')