diff --git a/swh/lister/bitbucket/tests/conftest.py b/swh/lister/bitbucket/tests/conftest.py
deleted file mode 100644
--- a/swh/lister/bitbucket/tests/conftest.py
+++ /dev/null
@@ -1,32 +0,0 @@
-# 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
-
-import pytest
-
-
-@pytest.fixture
-def lister_under_test():
-    return "bitbucket"
-
-
-@pytest.fixture
-def lister_bitbucket(swh_lister):
-    for task_type in [
-        {
-            "type": "load-git",
-            "description": "Load git repository",
-            "backend_name": "swh.loader.git.tasks.UpdateGitRepository",
-            "default_interval": "1 day",
-        },
-        {
-            "type": "load-hg",
-            "description": "Load hg repository",
-            "backend_name": "swh.loader.mercurial.tasks.LoadMercurial",
-            "default_interval": "1 day",
-        },
-    ]:
-        swh_lister.scheduler.create_task_type(task_type)
-
-    return swh_lister
diff --git a/swh/lister/cran/tests/conftest.py b/swh/lister/cran/tests/conftest.py
deleted file mode 100644
--- a/swh/lister/cran/tests/conftest.py
+++ /dev/null
@@ -1,11 +0,0 @@
-# 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"
diff --git a/swh/lister/gitea/tests/conftest.py b/swh/lister/gitea/tests/conftest.py
deleted file mode 100644
--- a/swh/lister/gitea/tests/conftest.py
+++ /dev/null
@@ -1,26 +0,0 @@
-# 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 "gitea"
-
-
-@pytest.fixture
-def lister_gitea(swh_lister):
-    for task_type in [
-        {
-            "type": "load-git",
-            "description": "Load git repository",
-            "backend_name": "swh.loader.git.tasks.UpdateGitRepository",
-            "default_interval": "1 day",
-        },
-    ]:
-        swh_lister.scheduler.create_task_type(task_type)
-
-    return swh_lister
diff --git a/swh/lister/github/tests/conftest.py b/swh/lister/github/tests/conftest.py
deleted file mode 100644
--- a/swh/lister/github/tests/conftest.py
+++ /dev/null
@@ -1,26 +0,0 @@
-# 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 "github"
-
-
-@pytest.fixture
-def lister_github(swh_lister):
-    for task_type in [
-        {
-            "type": "load-git",
-            "description": "Load git repository",
-            "backend_name": "swh.loader.git.tasks.UpdateGitRepository",
-            "default_interval": "1 day",
-        },
-    ]:
-        swh_lister.scheduler.create_task_type(task_type)
-
-    return swh_lister
diff --git a/swh/lister/npm/tests/conftest.py b/swh/lister/npm/tests/conftest.py
deleted file mode 100644
--- a/swh/lister/npm/tests/conftest.py
+++ /dev/null
@@ -1,11 +0,0 @@
-# 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
-
-import pytest
-
-
-@pytest.fixture
-def lister_under_test():
-    return "npm"
diff --git a/swh/lister/phabricator/tests/conftest.py b/swh/lister/phabricator/tests/conftest.py
deleted file mode 100644
--- a/swh/lister/phabricator/tests/conftest.py
+++ /dev/null
@@ -1,30 +0,0 @@
-# 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 "phabricator"
-
-
-@pytest.fixture
-def lister_phabricator(swh_lister):
-    # Amend the credentials
-    swh_lister.config = {
-        "cache_responses": False,
-        "credentials": {"phabricator": {swh_lister.instance: [{"password": "foo"}]}},
-    }
-    swh_lister.scheduler.create_task_type(
-        {
-            "type": "load-git",
-            "description": "Load git repository",
-            "backend_name": "swh.loader.git.tasks.UpdateGitRepository",
-            "default_interval": "1 day",
-        }
-    )
-
-    return swh_lister
diff --git a/swh/lister/pypi/tests/conftest.py b/swh/lister/pypi/tests/conftest.py
deleted file mode 100644
--- a/swh/lister/pypi/tests/conftest.py
+++ /dev/null
@@ -1,26 +0,0 @@
-# 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 "pypi"
-
-
-@pytest.fixture
-def lister_pypi(swh_lister):
-    # Add the load-pypi in the scheduler backend
-    swh_lister.scheduler.create_task_type(
-        {
-            "type": "load-pypi",
-            "description": "Load PyPI package",
-            "backend_name": "swh.loader.package.tasks.LoadPyPI",
-            "default_interval": "1 day",
-        }
-    )
-
-    return swh_lister