test_cases = [
    {
        "predictions": [[0.1, 0.1], [1.1, 0.1]],
        "references": [[0.1, 0.1], [1.1, 0.1]],
        "result": {"Peak Signal-to-Noise Ratio": 23.010298856486173}
    },
    {
        "predictions": [[0, 1], [0, 0]],
        "references": [[0, 0], [-1, -1]],
        "result": {"Peak Signal-to-Noise Ratio": 1.2493873660829993}
    }
]