def METHOD_NAME(lt_ctx):
    sig_shape = (5, 5)
    with pytest.raises(Exception) as e:
        lt_ctx.load(
            "mrc",
            path=MRC_TESTDATA_PATH,
            sig_shape=sig_shape
        )
    assert e.match(
        r"sig_shape must be of size: 1048576"
    )