Despite --help stating this: Notes: - It is safer to provide a bug id using -b option (bug id from a git commit is not always working). It seems to be the opposite. Using a bug id does not seem to work, for me at least: $ Tools/Scripts/export-w3c-test-changes -u git@github.com:ntrrgc/wpt.git -n ntrrgc -c -b 192204 No handlers could be found for logger "webkitpy.thirdparty.autoinstalled.keyring.backend" No changes to upstream. Exiting... On the other hand, using the git commit hash for the same bug gets me a bit further: $ Tools/Scripts/export-w3c-test-changes -u git@github.com:ntrrgc/wpt.git -n ntrrgc -c -g 5d6858971a7669ab73e0fd4d360e5d68f49dc26b No handlers could be found for logger "webkitpy.thirdparty.autoinstalled.keyring.backend" Fetching web-platform-tests repository Cleaning web-platform-tests master branch Applying patch to web-platform-tests branch wpt-export-for-webkit-189727 Enter GitHub OAuth token (or empty string to skip creating a pull request): Pushing branch wpt-export-for-webkit-189727 to git@github.com:ntrrgc/wpt.git This may take some time Branch available at https://github.com/ntrrgc/wpt/tree/wpt-export-for-webkit-189727 Making pull request WARNING: HTTP Error 403: Forbidden Could not add label "webkit-export" to pr #14391. User "ntrrgc" may not have permission to update labels in the web-platform-tests/wpt repo. Removing local branch wpt-export-for-webkit-189727 Finished Cleaning web-platform-tests master branch