diff --git a/MANIFEST.in b/MANIFEST.in
index c31438fc6399acf3302782e6cba5271301de7b7b..2f90a77b3df9688e759f43464e9b5363b1d92fa0 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -2,6 +2,7 @@ include Makefile
 include README
 include requirements*.txt
 include version.txt
+include conftest.py
 include swh/lister/cran/list_all_packages.R
 recursive-include swh/lister/*/tests/data/ *
 recursive-include swh py.typed
diff --git a/conftest.py b/conftest.py
index 1759d04da6daee24503a25683f5582a7f97f0149..e709cbe56aba7954bbbb746006efab26c7173ddf 100644
--- a/conftest.py
+++ b/conftest.py
@@ -7,7 +7,7 @@ import os
 
 import pytest
 
-pytest_plugins = ["swh.scheduler.pytest_plugin"]
+pytest_plugins = ["swh.scheduler.pytest_plugin", "swh.lister.pytest_plugin"]
 
 os.environ["LC_ALL"] = "C.UTF-8"
 
diff --git a/swh/lister/bitbucket/tests/conftest.py b/swh/lister/bitbucket/tests/conftest.py
deleted file mode 100644
index 507fef9155c09d3c24b5bbd30826801e6ee4ff6c..0000000000000000000000000000000000000000
--- a/swh/lister/bitbucket/tests/conftest.py
+++ /dev/null
@@ -1 +0,0 @@
-from swh.lister.core.tests.conftest import *  # noqa
diff --git a/swh/lister/cgit/tests/conftest.py b/swh/lister/cgit/tests/conftest.py
deleted file mode 100644
index 507fef9155c09d3c24b5bbd30826801e6ee4ff6c..0000000000000000000000000000000000000000
--- a/swh/lister/cgit/tests/conftest.py
+++ /dev/null
@@ -1 +0,0 @@
-from swh.lister.core.tests.conftest import *  # noqa
diff --git a/swh/lister/cran/tests/conftest.py b/swh/lister/cran/tests/conftest.py
index 30d88c385990f4a61c9248b706885b865d5d9cb8..7b7777a249c0348042ffa16ea88b2cd74e16711f 100644
--- a/swh/lister/cran/tests/conftest.py
+++ b/swh/lister/cran/tests/conftest.py
@@ -5,8 +5,6 @@
 
 import pytest
 
-from swh.lister.core.tests.conftest import *  # noqa
-
 
 @pytest.fixture
 def lister_cran(swh_listers):
diff --git a/swh/lister/debian/tests/conftest.py b/swh/lister/debian/tests/conftest.py
index 4b2ab4c383ba769478c200dbd968bf5a0e824e66..bea3f46c3c5988f4aadc42b14704f6ceb96cecad 100644
--- a/swh/lister/debian/tests/conftest.py
+++ b/swh/lister/debian/tests/conftest.py
@@ -1,4 +1,4 @@
-# Copyright (C) 2019 The Software Heritage developers
+# 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
@@ -9,7 +9,6 @@ from pytest_postgresql.janitor import DatabaseJanitor
 from sqlalchemy import create_engine
 from sqlalchemy.orm import sessionmaker
 
-from swh.lister.core.tests.conftest import *  # noqa
 from swh.lister.core.models import SQLBase
 from swh.lister.debian import debian_init
 
diff --git a/swh/lister/gitea/tests/conftest.py b/swh/lister/gitea/tests/conftest.py
deleted file mode 100644
index c18796b03b0597fdb5f05f395824c123cff887bd..0000000000000000000000000000000000000000
--- a/swh/lister/gitea/tests/conftest.py
+++ /dev/null
@@ -1,6 +0,0 @@
-# Copyright (C) 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
-
-from swh.lister.core.tests.conftest import *  # noqa
diff --git a/swh/lister/github/tests/conftest.py b/swh/lister/github/tests/conftest.py
deleted file mode 100644
index 507fef9155c09d3c24b5bbd30826801e6ee4ff6c..0000000000000000000000000000000000000000
--- a/swh/lister/github/tests/conftest.py
+++ /dev/null
@@ -1 +0,0 @@
-from swh.lister.core.tests.conftest import *  # noqa
diff --git a/swh/lister/gitlab/tests/conftest.py b/swh/lister/gitlab/tests/conftest.py
deleted file mode 100644
index 24269871f1b0c1d375b22c85832eb362648f0ef2..0000000000000000000000000000000000000000
--- a/swh/lister/gitlab/tests/conftest.py
+++ /dev/null
@@ -1,6 +0,0 @@
-# Copyright (C) 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
-
-from swh.lister.core.tests.conftest import *  # noqa
diff --git a/swh/lister/gnu/tests/conftest.py b/swh/lister/gnu/tests/conftest.py
deleted file mode 100644
index a4b2b262f26dc08b5da46f33d7e3f17a145a7073..0000000000000000000000000000000000000000
--- a/swh/lister/gnu/tests/conftest.py
+++ /dev/null
@@ -1,6 +0,0 @@
-# Copyright (C) 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
-
-from swh.lister.core.tests.conftest import *  # noqa
diff --git a/swh/lister/launchpad/tests/conftest.py b/swh/lister/launchpad/tests/conftest.py
index d1dd73ed3798ff04a5fd87e51432f2daccdf4a92..655d8589c111c5b83ee39b6341f0bc04300f9d45 100644
--- a/swh/lister/launchpad/tests/conftest.py
+++ b/swh/lister/launchpad/tests/conftest.py
@@ -3,7 +3,6 @@
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
-from swh.lister.core.tests.conftest import *  # noqa
 from datetime import datetime
 import json
 import os
diff --git a/swh/lister/npm/tests/conftest.py b/swh/lister/npm/tests/conftest.py
index bfa555f438276a0956a57f7047dfc32e694c7edc..507064d67c60f08df1af7a57393233c97efe2657 100644
--- a/swh/lister/npm/tests/conftest.py
+++ b/swh/lister/npm/tests/conftest.py
@@ -1,12 +1,10 @@
-# Copyright (C) 2019  The Software Heritage developers
+# 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
 
-from swh.lister.core.tests.conftest import *  # noqa
-
 
 @pytest.fixture
 def lister_npm(swh_listers):
diff --git a/swh/lister/packagist/tests/conftest.py b/swh/lister/packagist/tests/conftest.py
index 1eafc36a59669eb1b8db1f62c354a988ea5d088c..81f8e4499b2234014e6604ff277224bac5b158cb 100644
--- a/swh/lister/packagist/tests/conftest.py
+++ b/swh/lister/packagist/tests/conftest.py
@@ -1,12 +1,10 @@
-# Copyright (C) 2019  The Software Heritage developers
+# 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
 
-from swh.lister.core.tests.conftest import *  # noqa
-
 
 @pytest.fixture
 def lister_packagist(swh_listers):
diff --git a/swh/lister/phabricator/tests/conftest.py b/swh/lister/phabricator/tests/conftest.py
index 2713ce9c261caf8fe7b2990c845ca575526c5367..192612207a464b462f8036d599595f4b5892b554 100644
--- a/swh/lister/phabricator/tests/conftest.py
+++ b/swh/lister/phabricator/tests/conftest.py
@@ -1,12 +1,10 @@
-# Copyright (C) 2019  The Software Heritage developers
+# 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
 
-from swh.lister.core.tests.conftest import *  # noqa
-
 
 @pytest.fixture
 def lister_phabricator(swh_listers):
diff --git a/swh/lister/pypi/tests/conftest.py b/swh/lister/pypi/tests/conftest.py
index 658fdcb75dca1142461ad18ed80ebbf20c1cca90..5d235f7a3f742e6f40e0a089b3f89465fd285ee6 100644
--- a/swh/lister/pypi/tests/conftest.py
+++ b/swh/lister/pypi/tests/conftest.py
@@ -1,12 +1,10 @@
-# Copyright (C) 2019  The Software Heritage developers
+# 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
 
-from swh.lister.core.tests.conftest import *  # noqa
-
 
 @pytest.fixture
 def lister_pypi(swh_listers):
diff --git a/swh/lister/core/tests/conftest.py b/swh/lister/pytest_plugin.py
similarity index 99%
rename from swh/lister/core/tests/conftest.py
rename to swh/lister/pytest_plugin.py
index 647fd466c77e046f8a269ab1bcc0410c8654a7df..d58195c907bba1ff18fda51dc7cc13f0c151216c 100644
--- a/swh/lister/core/tests/conftest.py
+++ b/swh/lister/pytest_plugin.py
@@ -4,6 +4,7 @@
 # See top-level LICENSE file for more information
 
 import logging
+
 import pytest
 
 from sqlalchemy import create_engine
@@ -11,6 +12,7 @@ from sqlalchemy import create_engine
 from swh.lister import get_lister, SUPPORTED_LISTERS
 from swh.lister.core.models import initialize
 
+
 logger = logging.getLogger(__name__)