// These should be preserved or properly escaped
        assertNotNull(result);
        assertTrue(result.contains("Less than"));
    }

    @Test
    public void test_render_unicodeCharacters() {
        String markdown = "日本語テキスト **太字** *斜体*";
        String result = markdownRenderer.render(markdown);
        assertTrue(result.contains("日本語テキスト"));