diff --git a/src/xdist/plugin.py b/src/xdist/plugin.py
index f9abe704..e9cf2d62 100644
--- a/src/xdist/plugin.py
+++ b/src/xdist/plugin.py
@@ -316,6 +316,7 @@ def get_shared_data(request_or_session):
 @pytest.fixture(scope="session")
 def add_shared_data(request, worker_id):
     """Adds data that will be collected from all workers and be accessible from master node in sessionfinish hook"""
+
     def _add(key, value):
         shared = request.config.stash.setdefault(shared_key, {})
         if worker_id == "master":
@@ -323,4 +324,5 @@ def _add(key, value):
             shared[key] = [value]
         else:
             shared[key] = value
+
     return _add