    @Test
    public void testMergeSyncSiteswapsFailOnInvalidSiteswap() {

        Siteswap s1 = new Siteswap("86277");
        Siteswap s2 = new Siteswap("6787a");
        Siteswap merged = Siteswap.mergeCompatible(s1, s2);
        assertEquals(merged, null);
    }