diff --git a/swh/lister/pypi/tests/test_tasks.py b/swh/lister/pypi/tests/test_tasks.py
index 6e6e618..f90fee2 100644
--- a/swh/lister/pypi/tests/test_tasks.py
+++ b/swh/lister/pypi/tests/test_tasks.py
@@ -1,31 +1,30 @@
-# 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 unittest.mock import patch
-
 from swh.lister.pattern import ListerStats
 
 
 def test_ping(swh_scheduler_celery_app, swh_scheduler_celery_worker):
     res = swh_scheduler_celery_app.send_task("swh.lister.pypi.tasks.ping")
     assert res
     res.wait()
     assert res.successful()
     assert res.result == "OK"
 
 
-@patch("swh.lister.pypi.tasks.PyPILister")
-def test_lister(lister, swh_scheduler_celery_app, swh_scheduler_celery_worker):
-    # setup the mocked PypiLister
+def test_pypi_full_lister(
+    swh_scheduler_celery_app, swh_scheduler_celery_worker, mocker
+):
+    lister = mocker.patch("swh.lister.pypi.tasks.PyPILister")
     lister.from_configfile.return_value = lister
     lister.run.return_value = ListerStats(pages=1, origins=0)
 
     res = swh_scheduler_celery_app.send_task("swh.lister.pypi.tasks.PyPIListerTask")
     assert res
     res.wait()
     assert res.successful()
 
     lister.from_configfile.assert_called_once_with()
     lister.run.assert_called_once_with()