// Verify authenticator is properly named (no typo)
        assertEquals("SpnegoAuthenticator", SpnegoAuthenticator.class.getSimpleName());
    }

    @Test
    public void test_nullSafeLogout() {
        SpnegoAuthenticator authenticator = new SpnegoAuthenticator();

        // SPNEGO logout should return null (relies on Kerberos infrastructure)
        String logoutUrl = authenticator.logout(null);