diff --git a/tests/test_e2e_v27.py b/tests/test_e2e_v27.py
index 4dd06b4..7e32116 100644
--- a/tests/test_e2e_v27.py
+++ b/tests/test_e2e_v27.py
@@ -612,8 +612,15 @@ class TestE8MailTab:
         )
         # 添加评论（通过 blackboard 直接写）
         from src.api.mail_routes import _db_path
-        bb = Blackboard(_db_path())
-        bb.add_comment(mid, "simayi-challenger", "收到，正在处理", comment_type="general")
+        conn = get_connection(_db_path())
+        try:
+            conn.execute(
+                "INSERT INTO comments (task_id, author, comment_type, body) VALUES (?, ?, ?, ?)",
+                (mid, "simayi-challenger", "general", "收到，正在处理"),
+            )
+            conn.commit()
+        finally:
+            conn.close()
 
         resp = client.get(f"/api/mail/{mid}")
         data = resp.json()
@@ -641,7 +648,7 @@ class TestE8MailTab:
         assert resp.json()["is_read"] is True
 
     def test_e86_mark_executed(self, client):
-        """标记已执行"""
+        """标记已执行（走完整状态链）"""
         mid = self._send_mail(client,
             title="执行测试",
             text="body",
@@ -649,6 +656,10 @@ class TestE8MailTab:
             to="zhangfei-dev",
             type="task-assign",
         )
+        # 先走状态链到 review，再标记 executed
+        bb = Blackboard(_db_path())
+        for s in ["claimed", "working", "review"]:
+            bb.update_task_status(mid, s, agent="zhangfei-dev")
         resp = client.patch(f"/api/mail/{mid}", json={"mark_executed": True})
         assert resp.status_code == 200
         resp = client.get(f"/api/mail/{mid}")