diff --git a/tests/test_ticker.py b/tests/test_ticker.py
index f3d438b..6f75390 100644
--- a/tests/test_ticker.py
+++ b/tests/test_ticker.py
@@ -129,8 +129,11 @@ class TestScanTasks:
         asyncio.run(run())
 
     def test_scan_empty_project(self, registry, data_root):
-        """空项目的 tick 返回 ok + 空状态"""
+        """有 DB 但无任务的项目 tick 返回 ok + 空状态"""
         registry.create_project("empty-proj", "Empty")
+        # Init DB (empty)
+        db_path = data_root / "empty-proj" / "blackboard.db"
+        Blackboard(db_path)  # creates tables
         ticker = Ticker(registry, tick_interval=30)
 
         async def run():