def METHOD_NAME(self, backend):
    poly = Poly1305(b"0" * 32)
    poly.update(b"msg")
    with pytest.raises(InvalidSignature):
        poly.verify(b"")
    p2 = Poly1305(b"0" * 32)
    p2.update(b"msg")
    with pytest.raises(InvalidSignature):
        p2.verify(b"\x00" * 16)
    with pytest.raises(InvalidSignature):
        Poly1305.verify_tag(b"0" * 32, b"msg", b"\x00" * 16)