assertEquals("Administrators", builtinSid.toDisplayString());
    }

    /**
     * Test the toDisplayString method for an unresolved SID.
     *
     * @throws SmbException if the SID string is invalid
     */
    @Test
    void testToDisplayStringUnresolved() throws SmbException {
        SID sid = new SID(adminSidString);

        assertEquals("user2", ((SID) resolvedFirst[1]).acctName);

        // Second call with overlap should use cache for s2 and s3, requiring only s3 if not cached
        // Mark s3 unresolved to force resolve of one element
        doAnswer(inv -> {
            SID[] toResolve = inv.getArgument(2);
            for (SID s : toResolve) {
                s.type = jcifs.SID.SID_TYPE_USER;