LayoutTests/imported/w3c/web-platform-tests/tools/certs/config.json

{
    "ports": {
        "http": [],
        "https": ["auto"],
        "ws": [],
        "wss": []
    },
    "check_subdomains": false,
    "ssl": {
        "type": "openssl",
        "openssl": {
            "duration": 3650,
            "force_regenerate": true,
            "base_path": "tools/certs"
        }
    }
}