diff --git a/swh/graphql/tests/conftest.py b/swh/graphql/tests/conftest.py
index ef045de..03e319b 100644
--- a/swh/graphql/tests/conftest.py
+++ b/swh/graphql/tests/conftest.py
@@ -1,60 +1,60 @@
 # Copyright (C) 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
 
 
 from ariadne import graphql_sync
 from flask import Flask, jsonify, request
 import pytest
 
 from swh.graphql import server as app_server
 from swh.graphql.app import schema
 from swh.search import get_search as get_swh_search
 from swh.storage import get_storage as get_swh_storage
 
 from .data import populate_dummy_data, populate_search_data
 
 
-@pytest.fixture
+@pytest.fixture(scope="session")
 def storage():
     storage = get_swh_storage(cls="memory")
     # set the global var to use the in-memory storage
     app_server.storage = storage
     # populate the in-memory storage
     populate_dummy_data(storage)
     return storage
 
 
-@pytest.fixture
+@pytest.fixture(scope="session")
 def search():
     search = get_swh_search("memory")
     # set the global var to use the in-memory search
     app_server.search = search
     search.initialize()
     # populate the in-memory search
     populate_search_data(search)
     return search
 
 
-@pytest.fixture
+@pytest.fixture(scope="session")
 def test_app(storage, search):
     app = Flask(__name__)
 
     @app.route("/", methods=["POST"])
     def graphql_server():
         # GraphQL queries are always sent as POST
         data = request.get_json()
         success, result = graphql_sync(
             schema, data, context_value=request, debug=app.debug
         )
         status_code = 200 if success else 400
         return jsonify(result), status_code
 
     yield app
 
 
-@pytest.fixture
+@pytest.fixture(scope="session")
 def client(test_app):
     with test_app.test_client() as client:
         yield client