diff --git a/M02_MasterTemplete/CostFlow/_sample/masonry.json b/M02_MasterTemplete/CostFlow/_sample/masonry.json
index 3182b5a6a..7ad4f5adb 100644
--- a/M02_MasterTemplete/CostFlow/_sample/masonry.json
+++ b/M02_MasterTemplete/CostFlow/_sample/masonry.json
@@ -86,7 +86,7 @@
       "kind": "input",
       "name": "인력",
       "color": "#2f80ed",
-      "unit": "-",
+      "unit": "원/일",
       "x": 40,
       "y": 620,
       "input": {
diff --git a/resources/tester/test_m02_cf_sample.py b/resources/tester/test_m02_cf_sample.py
index 863354316..1312cd508 100644
--- a/resources/tester/test_m02_cf_sample.py
+++ b/resources/tester/test_m02_cf_sample.py
@@ -124,6 +124,9 @@ def test_견본_모양(name: str) -> None:
             assert len({i["cell"] for i in fn["inputs"]}) == len(fn["inputs"])
         if b["kind"] == "output":
             assert b["output"]["cost"] in ("노무비", "재료비", "경비", "값")
+        units = {e["unit"] for e in (b.get("input") or {}).get("elements") or []}
+        if len(units) == 1:  # 요소 단위가 모두 같으면 상자 단위도 그것(공통 단위 규칙)
+            assert b["unit"] == next(iter(units)), b["id"]
     for link in lg["links"]:
         a, z = boxes[link["from"]["box"]], boxes[link["to"]["box"]]
         assert link["from"]["name"] in _ports_out(a), link