diff --git a/mypy.ini b/mypy.ini
--- a/mypy.ini
+++ b/mypy.ini
@@ -32,5 +32,8 @@
 [mypy-dash_bootstrap_components.*]
 ignore_missing_imports = True
 
+[mypy-aioresponses.*]
+ignore_missing_imports = True
+
 [mypy-plotly.*]
 ignore_missing_imports = True
diff --git a/swh/scanner/tests/conftest.py b/swh/scanner/tests/conftest.py
--- a/swh/scanner/tests/conftest.py
+++ b/swh/scanner/tests/conftest.py
@@ -1,4 +1,4 @@
-# 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
@@ -10,7 +10,7 @@
 import sys
 
 import aiohttp
-from aioresponses import aioresponses  # type: ignore
+from aioresponses import aioresponses
 import pytest
 
 from swh.model.cli import model_of_dir