MiddlewareMixin = object
 
 
-def get_page(self, suffix):
+def get_page(self, suffix=''):
     """
     A function which will be monkeypatched onto the request to get the current
     integer representing the current page.
 
-# This file is part of django-ssify, licensed under GNU Affero GPLv3 or later.
-# Copyright © Fundacja Nowoczesna Polska. See README.md for more information.
-#
 [tox]
 envlist=clear,
-    d{12,13,14}-py27,
-    d{15}-py{27,32},
-    d16-py{27,32,33},
-    d17-py{27,32,33,34},
-    d18-py{27,32,33,34},
-    d{19,110}-py{27,34,35},
-    d111-py{27,34,35,36,37},
-    d20-py{34,35,36,37},
-    d{21,22}-py{35,36,37},
+    d{12,13,14,15,16,17,18}-py27,
+    d{19,110}-py{27,35},
+    d111-py{27,35,36,37},
+    d{20,21}-py{35,36,37},
+    d22-py{35,36,37,38},
+    d30-py{36,37,38},
     stats
 
 [testenv]
     d111: Django>=1.11,<2.0
     d20: Django>=2.0,<2.1
     d21: Django>=2.1,<2.2
-    d22: Django>=2.2,<2.3
+    d22: Django>=2.2,<3.0
+    d30: Django>=3.0,<3.1
     coverage
 
 [testenv:clear]
-basepython=python3.4
+basepython=python3
 commands=coverage erase
 
 [testenv:stats]
-basepython=python3.4
+basepython=python3
 commands=coverage html