qmk_firmware/lib/python/qmk/tests/minimal_info.json

{
    "keyboard_name": "tester",
    "maintainer": "qmk",
    "layouts": {
        "LAYOUT": {
            "layout": [
                {"label": "KC_A", "matrix": [0, 0], "x": 0, "y": 0}
            ]
        }
    }
}