// This test ensures the typo fix (SpengoConfig -> SpnegoConfig) is correct
        try {
            Class<?> configClass = Class.forName("org.codelibs.fess.sso.spnego.SpnegoAuthenticator$SpnegoConfig");
            assertNotNull(configClass);
            assertEquals("SpnegoConfig", configClass.getSimpleName());

            // Verify it's a static inner class