diff --git a/swh/fuse/tests/conftest.py b/swh/fuse/tests/conftest.py
index c565a6a..e5c2446 100644
--- a/swh/fuse/tests/conftest.py
+++ b/swh/fuse/tests/conftest.py
@@ -1,77 +1,76 @@
 # 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
 
 import json
 from multiprocessing import Process
 import os
 from pathlib import Path
 import subprocess
 from tempfile import NamedTemporaryFile, TemporaryDirectory
 import time
 
 from click.testing import CliRunner
 import pytest
 import yaml
 
 import swh.fuse.cli as cli
 from swh.fuse.tests.data.api_data import API_URL, MOCK_ARCHIVE
 
 
 @pytest.fixture
 def web_api_mock(requests_mock):
     for api_call, data in MOCK_ARCHIVE.items():
         # Convert Python dict JSON into a string (only for non-raw API call)
         if not api_call.endswith("raw/") and not api_call.startswith("graph/"):
             data = json.dumps(data)
         requests_mock.get(f"{API_URL}/{api_call}", text=data)
     return requests_mock
 
 
 @pytest.fixture
 def fuse_mntdir(web_api_mock):
     tmpdir = TemporaryDirectory(suffix=".swh-fuse-test")
-    tmpfile = NamedTemporaryFile(suffix=".swh-fuse-test.yml")
 
     config = {
         "cache": {"metadata": {"in-memory": True}, "blob": {"in-memory": True},},
         "web-api": {"url": API_URL, "auth-token": None},
         "json-indent": None,
     }
 
     # Run FUSE in foreground mode but in a separate process, so it does not
     # block execution and remains easy to kill during teardown
-    def fuse_process(tmpdir, tmpfile):
-        with tmpdir as mntdir, tmpfile as config_path:
-            config_path = Path(config_path.name)
+    def fuse_process(mntdir: Path):
+        with NamedTemporaryFile(suffix=".swh-fuse-test.yml") as tmpfile:
+            config_path = Path(tmpfile.name)
             config_path.write_text(yaml.dump(config))
             CliRunner().invoke(
                 cli.fuse,
                 args=[
                     "--config-file",
                     str(config_path),
                     "mount",
-                    mntdir,
+                    str(mntdir),
                     "--foreground",
                 ],
             )
 
-    fuse = Process(target=fuse_process, args=[tmpdir, tmpfile])
+    fuse = Process(target=fuse_process, args=[Path(tmpdir.name)])
     fuse.start()
     # Wait max 3 seconds for the FUSE to correctly mount
     for i in range(30):
         try:
             root = os.listdir(tmpdir.name)
             if root:
                 break
         except FileNotFoundError:
             pass
         time.sleep(0.1)
     else:
         raise FileNotFoundError(f"Could not mount FUSE in {tmpdir.name}")
 
     yield Path(tmpdir.name)
 
     subprocess.run(["fusermount", "-u", tmpdir.name], check=True)
     fuse.join()