diff --git a/swh/fuse/tests/conftest.py b/swh/fuse/tests/conftest.py
--- a/swh/fuse/tests/conftest.py
+++ b/swh/fuse/tests/conftest.py
@@ -32,7 +32,6 @@
 @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},},
@@ -42,9 +41,9 @@
 
     # 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,
@@ -52,12 +51,12 @@
                     "--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):