diff --git a/tests/core/prompt-builder.test.ts b/tests/core/prompt-builder.test.ts
index e21eff2..4231e25 100644
--- a/tests/core/prompt-builder.test.ts
+++ b/tests/core/prompt-builder.test.ts
@@ -64,7 +64,7 @@ describe("PromptBuilder", () => {
 
   it("空字符串段被跳过", () => {
     const result = new PromptBuilder().head("# 标题").context("").prompt("内容").build();
-    expect(result).toBe("# 标题\n\n内容");
+    expect(result).toBe("# 标题\n---\n内容");
   });
 
   it("链式调用返回 this", () => {