diff --git a/requirements-test.txt b/requirements-test.txt
index 2576dc1..d0c4f08 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -1,3 +1,7 @@
 pytest
 pytest-mock
 confluent-kafka
+types-click
+types-pytz
+types-pyyaml
+types-requests
diff --git a/swh/__init__.py b/swh/__init__.py
index 7dd8d61..030e022 100644
--- a/swh/__init__.py
+++ b/swh/__init__.py
@@ -1,9 +1,9 @@
-# Copyright (C) 2019-2020  The Software Heritage developers
+# Copyright (C) 2019-2021  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__)