diff --git a/swh/loader/mercurial/tests/test_tasks.py b/swh/loader/mercurial/tests/test_tasks.py
index 6e050d7..0c44cd3 100644
--- a/swh/loader/mercurial/tests/test_tasks.py
+++ b/swh/loader/mercurial/tests/test_tasks.py
@@ -1,40 +1,45 @@
 # Copyright (C) 2018-2019  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
 
 
 def test_loader(mocker, swh_app, celery_session_worker):
     mock_loader = mocker.patch(
         'swh.loader.mercurial.loader.HgBundle20Loader.load')
     mock_loader.return_value = {'status': 'eventful'}
 
     res = swh_app.send_task(
         'swh.loader.mercurial.tasks.LoadMercurial',
-        (), dict(url='origin_url',
-                 directory='/some/repo',
-                 visit_date='now'))
+        kwargs={
+            'url': 'origin_url',
+            'directory': '/some/repo',
+            'visit_date': 'now',
+        })
+
     assert res
     res.wait()
     assert res.successful()
 
     assert res.result == {'status': 'eventful'}
     mock_loader.assert_called_once_with()
 
 
 def test_archive_loader(mocker, swh_app, celery_session_worker):
     mock_loader = mocker.patch(
         'swh.loader.mercurial.loader.HgArchiveBundle20Loader.load')
     mock_loader.return_value = {'status': 'uneventful'}
 
     res = swh_app.send_task(
         'swh.loader.mercurial.tasks.LoadArchiveMercurial',
-        (), dict(url='another_url',
-                 archive_path='/some/tar.tgz',
-                 visit_date='now'))
+        kwargs={
+            'url': 'another_url',
+            'archive_path': '/some/tar.tgz',
+            'visit_date': 'now',
+        })
     assert res
     res.wait()
     assert res.successful()
 
     assert res.result == {'status': 'uneventful'}
     mock_loader.assert_called_once_with()