diff --git a/requirements-test.txt b/requirements-test.txt
index cda155f8..3af04370 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -1,8 +1,9 @@
 pytest
 pytest-django
 pytest-mock
 swh.scheduler[testing]
 swh.loader.core[testing]
 pytest-postgresql >= 2.1.0
 requests_mock
 django-stubs
+djangorestframework-stubs >= 1.4
diff --git a/swh/deposit/urls.py b/swh/deposit/urls.py
index d5d2fc68..22c5a4c6 100644
--- a/swh/deposit/urls.py
+++ b/swh/deposit/urls.py
@@ -1,31 +1,35 @@
 # Copyright (C) 2017-2019  The Software Heritage developers
 # See the AUTHORS file at the top-level directory of this distribution
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
 """SWH's main deposit URL Configuration
 
 """
 
+from typing import Sequence, Union
+
 from django.conf.urls import include, url
 from django.shortcuts import render
+from django.urls import URLPattern, URLResolver
 from django.views.generic.base import RedirectView
 from rest_framework.urlpatterns import format_suffix_patterns
 
 favicon_view = RedirectView.as_view(
     url="/static/img/icons/swh-logo-32x32.png", permanent=True
 )
 
 
 def default_view(req):
     return render(req, "homepage.html")
 
 
-urlpatterns = [
-    url(r"^favicon\.ico$", favicon_view),
-    url(r"^1/", include("swh.deposit.api.urls")),
-    url(r"^1/private/", include("swh.deposit.api.private.urls")),
-    url(r"^$", default_view, name="home"),
-]
-
-urlpatterns = format_suffix_patterns(urlpatterns)  # type: ignore
+urlpatterns: Sequence[Union[URLPattern, URLResolver]]
+urlpatterns = format_suffix_patterns(
+    [
+        url(r"^favicon\.ico$", favicon_view),
+        url(r"^1/", include("swh.deposit.api.urls")),
+        url(r"^1/private/", include("swh.deposit.api.private.urls")),
+        url(r"^$", default_view, name="home"),
+    ]
+)
diff --git a/tox.ini b/tox.ini
index f9d945e7..12c11f50 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,45 +1,43 @@
 [tox]
 envlist=flake8,mypy,py3-django2
 
 [testenv]
 extras =
   testing
 deps =
   # the dependency below is needed for now as a workaround for
   #   https://github.com/pypa/pip/issues/6239
   swh.core[http] >= 0.3
   swh.scheduler[testing] >= 0.5.0
   dev: pdbpp
   pytest-cov
   django2: Django>=2,<3
 commands =
   pytest \
   !dev: --cov {envsitepackagesdir}/swh/deposit --cov-branch \
         {envsitepackagesdir}/swh/deposit \
         {posargs}
 
 [testenv:black]
 skip_install = true
 deps =
   black==19.10b0
 commands =
   {envpython} -m black --check swh
 
 [testenv:flake8]
 skip_install = true
 deps =
   flake8
 commands =
   {envpython} -m flake8 \
     --exclude=.tox,.git,__pycache__,.tox,.eggs,*.egg,swh/deposit/migrations
 
 [testenv:mypy]
 setenv = DJANGO_SETTINGS_MODULE=swh.deposit.settings.testing
 extras =
   testing
 deps =
   mypy
-  django-stubs
-  djangorestframework-stubs >= 1.3.0
 commands =
   mypy swh