def test_accumulated_precipitation_to_imperial():
    """Test accumulated_precipitation conversion to imperial system."""
    assert (IMPERIAL_SYSTEM.accumulated_precipitation(
        10, IMPERIAL_SYSTEM.accumulated_precipitation_unit) == 10)
    assert IMPERIAL_SYSTEM.accumulated_precipitation(
        254, METRIC_SYSTEM.accumulated_precipitation_unit) == pytest.approx(
            10, abs=1e-4)