Switch to tempfile.TemporaryDirectory()

Author: lenacohen

tests/selenium/pbtest.py

@@ -164,7 +164,7 @@ def on_travis(self):
     def chrome_manager(self):
         opts = ChromeOptions()
         opts.add_argument("--load-extension=" + self.extension_path)
-        opts.add_argument(f"--user-data-dir={mkdtemp()}")
+        opts.add_argument(f"--user-data-dir={tempfile.TemporaryDirectory()}")
         opts.binary_location = self.browser_path
 
         # TODO not yet in Firefox (w/o hacks anyway):