diff --git a/MANIFEST.in b/MANIFEST.in
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -2,4 +2,6 @@
 include requirements*.txt
 include version.txt
 include README.md
+include conftest.py
 recursive-include swh py.typed
+recursive-include swh/loader/bzr/tests/data/ *
diff --git a/conftest.py b/conftest.py
--- a/conftest.py
+++ b/conftest.py
@@ -1,4 +1,4 @@
-# Copyright (C) 2021 The Software Heritage developers
+# Copyright (C) 2021-2022 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
@@ -8,3 +8,10 @@
     "swh.storage.pytest_plugin",
     "swh.loader.pytest_plugin",
 ]
+
+
+@pytest.fixture(scope="session")
+def swh_scheduler_celery_includes(swh_scheduler_celery_includes):
+    return swh_scheduler_celery_includes + [
+        "swh.loader.bzr.tasks",
+    ]