diff --git a/requirements-test.txt b/requirements-test.txt
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -1,6 +1,9 @@
 confluent-kafka
+hypothesis >= 3.11.0
 pytest
 pytest-mock
-hypothesis>=3.11.0
 swh.scheduler[testing] >= 0.5.0
 swh.storage[testing] >= 0.10.0
+
+types-click
+types-pyyaml
diff --git a/swh/__init__.py b/swh/__init__.py
--- 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__ = extend_path(__path__, __name__)  # type: Iterable[str]
+__path__: List[str] = extend_path(__path__, __name__)