diff --git a/requirements-test.txt b/requirements-test.txt
index b72b790..243b9f6 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -1,4 +1,6 @@
-pytest
 apache-libcloud
 azure-storage-blob >= 12.0
+pytest
 python-cephlibs
+types-pyyaml
+types-requests
diff --git a/swh/__init__.py b/swh/__init__.py
index e780381..8d9f151 100644
--- a/swh/__init__.py
+++ b/swh/__init__.py
@@ -1,4 +1,4 @@
 from pkgutil import extend_path
-from typing import Iterable
+from typing import List
 
-__path__: Iterable[str] = extend_path(__path__, __name__)
+__path__: List[str] = extend_path(__path__, __name__)
diff --git a/swh/objstorage/__init__.py b/swh/objstorage/__init__.py
index 2b0fb3d..0958148 100644
--- a/swh/objstorage/__init__.py
+++ b/swh/objstorage/__init__.py
@@ -1,9 +1,9 @@
-# Copyright (C) 2020  The Software Heritage developers
+# Copyright (C) 2020-2021  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
 
 from pkgutil import extend_path
-from typing import Iterable
+from typing import List
 
-__path__: Iterable[str] = extend_path(__path__, __name__)
+__path__: List[str] = extend_path(__path__, __name__)