diff --git a/MANIFEST.in b/MANIFEST.in
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,5 +1,5 @@
 include Makefile
 include requirements*.txt
 include version.txt
-recursive-include swh/loader/mercurial/tests/resources *
+recursive-include swh/loader/mercurial/tests/data *
 recursive-include swh py.typed
diff --git a/swh/loader/mercurial/tests/conftest.py b/swh/loader/mercurial/tests/conftest.py
--- a/swh/loader/mercurial/tests/conftest.py
+++ b/swh/loader/mercurial/tests/conftest.py
@@ -56,15 +56,6 @@
     return conffile
 
 
-@pytest.fixture
-def datadir(request):
-    """Override default datadir because it's named `resources` in this repository and not
-    `data` as expected by the default fixture.
-
-    """
-    return os.path.join(os.path.dirname(str(request.fspath)), "resources")
-
-
 @pytest.fixture(scope="session")  # type: ignore  # expected redefinition
 def celery_includes():
     return [
diff --git a/swh/loader/mercurial/tests/resources/hello.tgz b/swh/loader/mercurial/tests/data/hello.tgz
rename from swh/loader/mercurial/tests/resources/hello.tgz
rename to swh/loader/mercurial/tests/data/hello.tgz
diff --git a/swh/loader/mercurial/tests/resources/the-sandbox.tgz b/swh/loader/mercurial/tests/data/the-sandbox.tgz
rename from swh/loader/mercurial/tests/resources/the-sandbox.tgz
rename to swh/loader/mercurial/tests/data/the-sandbox.tgz
diff --git a/swh/loader/mercurial/tests/resources/transplant.tgz b/swh/loader/mercurial/tests/data/transplant.tgz
rename from swh/loader/mercurial/tests/resources/transplant.tgz
rename to swh/loader/mercurial/tests/data/transplant.tgz