diff --git a/apps/ai-game-creator-shell/tests/ChatMarkdownMessage.test.tsx b/apps/ai-game-creator-shell/tests/ChatMarkdownMessage.test.tsx
index 30eac0d09..82aec9c8e 100644
--- a/apps/ai-game-creator-shell/tests/ChatMarkdownMessage.test.tsx
+++ b/apps/ai-game-creator-shell/tests/ChatMarkdownMessage.test.tsx
@@ -38,6 +38,21 @@ describe('ChatMarkdownMessage', () => {
     expect(lists[2]?.className).toContain('pl-4');
   });
 
+  it('为四到六级标题提供递进的字号与字重', () => {
+    const { container } = render(
+      <ChatMarkdownMessage
+        role="assistant"
+        text={'#### H4 四级标题\n\n##### H5 五级标题\n\n###### H6 六级标题'}
+      />,
+    );
+
+    expect(container.querySelector('h4')?.className).toContain('text-sm');
+    expect(container.querySelector('h4')?.className).toContain('font-semibold');
+    expect(container.querySelector('h5')?.className).toContain('font-medium');
+    expect(container.querySelector('h6')?.className).toContain('text-xs');
+    expect(container.querySelector('h6')?.className).toContain('tracking-wide');
+  });
+
   it('有序列表不添加无序列表短横线，列表项段落与文本同行', () => {
     const { container } = render(
       <ChatMarkdownMessage