public void testAutoCloseableImpl() {
        String testPassword = "AutoCloseablePass123!";
        NtlmPasswordAuthenticator authRef;

        // Use try-with-resources
        try (NtlmPasswordAuthenticator auth = new NtlmPasswordAuthenticator("user", testPassword)) {
            authRef = auth;
            assertEquals(testPassword, auth.getPassword());
            assertFalse(auth.isClosed());
        }