def METHOD_NAME(request, channels_first):
    """
    Empty image fixtures of shape NHWC and NCHW.
    """
    channels = request.param
    if channels_first:
        data_shape = (2, channels, 12, 8)
    else:
        data_shape = (2, 12, 8, channels)
    return np.zeros(data_shape).astype(ART_NUMPY_DTYPE)