diff --git a/swh/lister/cran/tests/conftest.py b/swh/lister/cran/tests/conftest.py
index 4f086d8..686ee86 100644
--- a/swh/lister/cran/tests/conftest.py
+++ b/swh/lister/cran/tests/conftest.py
@@ -1,26 +1,25 @@
 # Copyright (C) 2019-2020  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
 
 import pytest
 
 
 @pytest.fixture
 def lister_under_test():
     return "cran"
 
 
 @pytest.fixture
 def lister_cran(swh_lister):
-    # Add the load-cran in the scheduler backend
     swh_lister.scheduler.create_task_type(
         {
             "type": "load-cran",
             "description": "Load a CRAN package",
             "backend_name": "swh.loader.package.cran.tasks.LoaderCRAN",
             "default_interval": "1 day",
         }
     )
 
     return swh_lister
diff --git a/swh/lister/cran/tests/test_lister.py b/swh/lister/cran/tests/test_lister.py
index 9512970..95675c9 100644
--- a/swh/lister/cran/tests/test_lister.py
+++ b/swh/lister/cran/tests/test_lister.py
@@ -1,71 +1,69 @@
 # Copyright (C) 2019-2020 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
 
 import json
 from os import path
 from unittest.mock import patch
 
 import pytest
 
 from swh.lister.cran.lister import CRAN_MIRROR, compute_origin_urls
 
 
 def test_cran_compute_origin_urls():
     pack = "something"
     vers = "0.0.1"
     origin_url, artifact_url = compute_origin_urls({"Package": pack, "Version": vers,})
 
     assert origin_url == f"{CRAN_MIRROR}/package={pack}"
     assert artifact_url == f"{CRAN_MIRROR}/src/contrib/{pack}_{vers}.tar.gz"
 
 
 def test_cran_compute_origin_urls_failure():
     for incomplete_repo in [{"Version": "0.0.1"}, {"Package": "package"}, {}]:
         with pytest.raises(KeyError):
             compute_origin_urls(incomplete_repo)
 
 
 @patch("swh.lister.cran.lister.read_cran_data")
 def test_cran_lister_cran(mock_cran, datadir, lister_cran):
-    lister = lister_cran
-
     with open(path.join(datadir, "list-r-packages.json")) as f:
         data = json.loads(f.read())
 
     mock_cran.return_value = data
     assert len(data) == 6
 
-    lister.run()
+    lister_cran.run()
 
-    r = lister.scheduler.search_tasks(task_type="load-cran")
+    r = lister_cran.scheduler.search_tasks(task_type="load-cran")
     assert len(r) == 6
 
     for row in r:
         assert row["type"] == "load-cran"
         # arguments check
         args = row["arguments"]["args"]
         assert len(args) == 0
 
         # kwargs
         kwargs = row["arguments"]["kwargs"]
         assert len(kwargs) == 2
         assert set(kwargs.keys()) == {"url", "artifacts"}
 
         artifacts = kwargs["artifacts"]
         assert len(artifacts) == 1
 
         assert set(artifacts[0].keys()) == {"url", "version"}
 
         assert row["policy"] == "oneshot"
         assert row["retries_left"] == 3
 
         origin_url = kwargs["url"]
         record = (
-            lister.db_session.query(lister.MODEL)
+            lister_cran.db_session.query(lister_cran.MODEL)
             .filter(origin_url == origin_url)
             .first()
         )
         assert record
         assert record.uid == f"{record.name}-{record.version}"