diff --git a/swh/lister/cgit/tasks.py b/swh/lister/cgit/tasks.py
--- a/swh/lister/cgit/tasks.py
+++ b/swh/lister/cgit/tasks.py
@@ -7,17 +7,9 @@
 from .lister import CGitLister
 
 
-def new_lister(url='https://git.kernel.org/',
-               url_prefix=None,
-               instance='kernal', **kw):
-    return CGitLister(url=url, instance=instance, url_prefix=url_prefix,
-                      **kw)
-
-
 @app.task(name=__name__ + '.CGitListerTask')
 def cgit_lister(**lister_args):
-    lister = new_lister(**lister_args)
-    lister.run()
+    CGitLister(**lister_args).run()
 
 
 @app.task(name=__name__ + '.ping')
diff --git a/swh/lister/cgit/tests/test_tasks.py b/swh/lister/cgit/tests/test_tasks.py
--- a/swh/lister/cgit/tests/test_tasks.py
+++ b/swh/lister/cgit/tests/test_tasks.py
@@ -11,7 +11,7 @@
 
 
 @patch('swh.lister.cgit.tasks.CGitLister')
-def test_lister_no_url_prefix(lister, swh_app, celery_session_worker):
+def test_lister(lister, swh_app, celery_session_worker):
     # setup the mocked CGitLister
     lister.return_value = lister
     lister.run.return_value = None
@@ -25,29 +25,6 @@
 
     lister.assert_called_once_with(
            url='https://git.kernel.org/',
-           url_prefix=None,
            instance='kernel')
     lister.db_last_index.assert_not_called()
     lister.run.assert_called_once_with()
-
-
-@patch('swh.lister.cgit.tasks.CGitLister')
-def test_lister_with_url_prefix(lister, swh_app, celery_session_worker):
-    # setup the mocked CGitLister
-    lister.return_value = lister
-    lister.run.return_value = None
-
-    res = swh_app.send_task(
-        'swh.lister.cgit.tasks.CGitListerTask',
-        kwargs=dict(url='https://cgit.kde.org/',
-                    url_prefix='https://anongit.kde.org/', instance='kde'))
-    assert res
-    res.wait()
-    assert res.successful()
-
-    lister.assert_called_once_with(
-           url='https://cgit.kde.org/',
-           url_prefix='https://anongit.kde.org/',
-           instance='kde')
-    lister.db_last_index.assert_not_called()
-    lister.run.assert_called_once_with()