diff --git a/resources/tester/helper_307_pick_highlight.cjs b/resources/tester/helper_307_pick_highlight.cjs
index cf10fb03d..621fdafaf 100644
--- a/resources/tester/helper_307_pick_highlight.cjs
+++ b/resources/tester/helper_307_pick_highlight.cjs
@@ -17,7 +17,8 @@ const load = (file) => {
   const near = (m) => {
     if (m.startsWith("@config/")) return load(path.join(ROOT, "config", `${m.slice(8)}.ts`));
     if (m.endsWith(".json")) return require(path.join(path.dirname(file), m));
-    if (m.startsWith(".")) return load(path.join(path.dirname(file), `${m}.ts`));
+    if (m.startsWith("."))
+      return load(path.join(path.dirname(file), `${m.replace(/\.js$/, "")}.ts`));
     return new Proxy({}, { get: () => () => {} });
   };
   new Function("exports", "module", "require", js)(box.exports, box, near);
diff --git a/resources/tester/test_b06_save_recompute.py b/resources/tester/test_b06_save_recompute.py
index a87c32222..63518f427 100644
--- a/resources/tester/test_b06_save_recompute.py
+++ b/resources/tester/test_b06_save_recompute.py
@@ -23,9 +23,9 @@ SHARED = ROOT / "A00_Common" / "design" / "design_shared.ts"
 SAVE = ROOT / "A00_Common" / "design" / "design_save.ts"
 
 
-def _body(source: str, marker: str) -> str:
+def _body(source: str, marker: str, size: int = 1200) -> str:
     start = source.index(marker)
-    return source[start : start + 1200]
+    return source[start : start + size]
 
 
 def test_저장이_면적을_모으기_전에_다시_계산한다() -> None:
@@ -36,7 +36,7 @@ def test_저장이_면적을_모으기_전에_다시_계산한다() -> None:
     shared = _body(SHARED.read_text(encoding="utf-8"), "export async function saveSharedDesign")
     assert "prepare: crossSave?.prepare" in shared, "한 벌이 재계산을 저장 한 줄기에 안 넘긴다"
     save = SAVE.read_text(encoding="utf-8")
-    run = _body(save, "export async function saveDesign")
+    run = _body(save, "export async function saveDesign", 4000)
     assert run.index("ctx.prepare?.()") < run.index("ctx.cross(confirm)"), (
         "저장 한 줄기가 재계산보다 면적 수집을 먼저 부른다 — 옛 면적이 실린다"
     )