diff --git a/resources/tester/helper_298_2_b07_buttons.cjs b/resources/tester/helper_298_2_b07_buttons.cjs
index f145823dd..549f1d48c 100644
--- a/resources/tester/helper_298_2_b07_buttons.cjs
+++ b/resources/tester/helper_298_2_b07_buttons.cjs
@@ -4,7 +4,7 @@
  */
 const fs = require("fs");
 const path = require("path");
-const ts = require(path.join(__dirname, "..", "..", "config", "node_modules", "typescript"));
+const { makeLoader } = require("./helper_ts_stub_loader.cjs");
 
 const B07 = path.join(__dirname, "..", "..", "B07_DesignDetail");
 const calls = [];
@@ -36,14 +36,13 @@ global.localStorage = {
 global.location = { reload: () => calls.push(["reload"]) };
 global.document = { querySelectorAll: () => [] };
 
-function loadTs(file) {
-  const js = ts.transpileModule(fs.readFileSync(file, "utf8"), {
-    compilerOptions: { module: ts.ModuleKind.CommonJS, target: ts.ScriptTarget.ES2020 },
-  }).outputText;
-  const box = { exports: {} };
-  new Function("exports", "module", "require", js)(box.exports, box, (r) => STUBS[r] ?? {});
-  return box.exports;
-}
+const { loadTs } = makeLoader({
+  root: path.join(__dirname, "..", ".."),
+  cache: false,
+  requireFor: (full) => {
+    return (r) => STUBS[r] ?? {};
+  },
+});
 
 const Save = loadTs(path.join(B07, "B07_DesignDetail_UI_Save.ts"));
 
diff --git a/resources/tester/helper_391_routeedit_plan_draw.cjs b/resources/tester/helper_391_routeedit_plan_draw.cjs
index 91ba4ea0c..6650277c7 100644
--- a/resources/tester/helper_391_routeedit_plan_draw.cjs
+++ b/resources/tester/helper_391_routeedit_plan_draw.cjs
@@ -3,27 +3,18 @@
  */
 const fs = require("fs");
 const path = require("path");
-const ts = require(path.join(__dirname, "..", "..", "config", "node_modules", "typescript"));
+const { makeLoader } = require("./helper_ts_stub_loader.cjs");
 const B05 = path.join(__dirname, "..", "..", "B05_Profile");
 
 const STUBS = { "./B05_Profile_UI_RouteEdit_Input": { pickHover: () => null } };
-const cache = new Map();
-function loadTs(full) {
-  if (cache.has(full)) return cache.get(full);
-  const js = ts.transpileModule(fs.readFileSync(full, "utf8"), {
-    compilerOptions: { module: ts.ModuleKind.CommonJS, target: ts.ScriptTarget.ES2020 },
-  }).outputText;
-  const box = { exports: {} };
-  cache.set(full, box.exports);
-  const localRequire = (request) => {
+const { loadTs } = makeLoader({
+  root: path.join(__dirname, "..", ".."),
+  requireFor: (full) => (request) => {
     if (STUBS[request]) return STUBS[request];
     if (request.startsWith(".")) return loadTs(path.join(path.dirname(full), `${request}.ts`));
     return require(request);
-  };
-  new Function("exports", "module", "require", js)(box.exports, box, localRequire);
-  cache.set(full, box.exports);
-  return box.exports;
-}
+  },
+});
 
 /** 그린 것만 적는 가짜 캔버스 — 선 = moveTo/lineTo 점 · 점 = arc 가운데 · 획 색. */
 function fakeContext() {
diff --git a/resources/tester/helper_399_plan_structure_marks.cjs b/resources/tester/helper_399_plan_structure_marks.cjs
index 540d11f70..a5a9b13a3 100644
--- a/resources/tester/helper_399_plan_structure_marks.cjs
+++ b/resources/tester/helper_399_plan_structure_marks.cjs
@@ -5,7 +5,7 @@
  */
 const fs = require("fs");
 const path = require("path");
-const ts = require(path.join(__dirname, "..", "..", "config", "node_modules", "typescript"));
+const { makeLoader } = require("./helper_ts_stub_loader.cjs");
 
 const B05 = path.join(__dirname, "..", "..", "B05_Profile");
 const out = {};
@@ -94,25 +94,16 @@ const STUBS = {
     ],
   },
 };
-const cache = new Map();
-function loadTs(full) {
-  if (cache.has(full)) return cache.get(full);
-  const js = ts.transpileModule(fs.readFileSync(full, "utf8"), {
-    compilerOptions: { module: ts.ModuleKind.CommonJS, target: ts.ScriptTarget.ES2020 },
-  }).outputText;
-  const box = { exports: {} };
-  cache.set(full, box.exports);
-  const localRequire = (request) => {
+const { loadTs } = makeLoader({
+  root: path.join(__dirname, "..", ".."),
+  requireFor: (full) => (request) => {
     if (STUBS[request]) return STUBS[request];
     if (request.startsWith("@ui/"))
       return loadTs(path.join(B05, "..", "ui_template", `${request.slice(4)}.ts`));
     if (request.startsWith(".")) return loadTs(path.join(path.dirname(full), `${request}.ts`));
     return require(request);
-  };
-  new Function("exports", "module", "require", js)(box.exports, box, localRequire);
-  cache.set(full, box.exports);
-  return box.exports;
-}
+  },
+});
 
 /** 그린 것만 적는 가짜 캔버스 — 획 = 색 · 굵기 · 그때 옮긴 자리(translate) · 선 점. */
 function fakeContext(canvas) {
diff --git a/resources/tester/helper_403_triangle_angle.cjs b/resources/tester/helper_403_triangle_angle.cjs
index 72e54682e..876966f48 100644
--- a/resources/tester/helper_403_triangle_angle.cjs
+++ b/resources/tester/helper_403_triangle_angle.cjs
@@ -1,26 +1,22 @@
 /* 403 곡선 창 하단 글 헬퍼 — `_Label.curveInfoText` 를 트랜스파일해 경우별 글을 JSON 으로 낸다. */
 const fs = require("fs");
 const path = require("path");
-const ts = require(path.join(__dirname, "..", "..", "config", "node_modules", "typescript"));
+const { makeLoader } = require("./helper_ts_stub_loader.cjs");
 const B05 = path.join(__dirname, "..", "..", "B05_Profile");
 
 const STUBS = {
   "@ui/ui_template_elements": { createButton: () => null },
   "./B05_Profile_UI_Panel_Fields": { numberField: () => null, toggleButton: () => null },
 };
-function loadTs(full) {
-  const js = ts.transpileModule(fs.readFileSync(full, "utf8"), {
-    compilerOptions: { module: ts.ModuleKind.CommonJS, target: ts.ScriptTarget.ES2020 },
-  }).outputText;
-  const box = { exports: {} };
-  const localRequire = (request) => {
+const { loadTs } = makeLoader({
+  root: path.join(__dirname, "..", ".."),
+  cache: false,
+  requireFor: (full) => (request) => {
     if (STUBS[request]) return STUBS[request];
     if (request.startsWith(".")) return loadTs(path.join(path.dirname(full), `${request}.ts`));
     return require(request);
-  };
-  new Function("exports", "module", "require", js)(box.exports, box, localRequire);
-  return box.exports;
-}
+  },
+});
 
 const { curveInfoText } = loadTs(path.join(B05, "B05_Profile_UI_RouteEdit_Label.ts"));
 process.stdout.write(
diff --git a/resources/tester/helper_411_a_cross_structure.cjs b/resources/tester/helper_411_a_cross_structure.cjs
index b31414518..f575cfbfd 100644
--- a/resources/tester/helper_411_a_cross_structure.cjs
+++ b/resources/tester/helper_411_a_cross_structure.cjs
@@ -5,7 +5,7 @@
  */
 const fs = require("fs");
 const path = require("path");
-const ts = require(path.join(__dirname, "..", "..", "config", "node_modules", "typescript"));
+const { makeLoader } = require("./helper_ts_stub_loader.cjs");
 
 const B05 = path.join(__dirname, "..", "..", "B05_Profile");
 const out = {};
@@ -84,23 +84,14 @@ const STUBS = {
     routeCrossSource: () => null,
   },
 };
-const cache = new Map();
-function loadTs(full) {
-  if (cache.has(full)) return cache.get(full);
-  const js = ts.transpileModule(fs.readFileSync(full, "utf8"), {
-    compilerOptions: { module: ts.ModuleKind.CommonJS, target: ts.ScriptTarget.ES2020 },
-  }).outputText;
-  const box = { exports: {} };
-  cache.set(full, box.exports);
-  const localRequire = (request) => {
+const { loadTs } = makeLoader({
+  root: path.join(__dirname, "..", ".."),
+  requireFor: (full) => (request) => {
     if (STUBS[request]) return STUBS[request];
     if (request.startsWith(".")) return loadTs(path.join(path.dirname(full), `${request}.ts`));
     return require(request);
-  };
-  new Function("exports", "module", "require", js)(box.exports, box, localRequire);
-  cache.set(full, box.exports);
-  return box.exports;
-}
+  },
+});
 
 const cross = loadTs(path.join(B05, "B05_Profile_UI_RouteEdit_Cross.ts"));
 const station = (key, chainageM, kind, id = null) => ({ key, chainageM, kind, id });
diff --git a/resources/tester/helper_438_1_straighten.cjs b/resources/tester/helper_438_1_straighten.cjs
index 88d6355f9..ebbcb8984 100644
--- a/resources/tester/helper_438_1_straighten.cjs
+++ b/resources/tester/helper_438_1_straighten.cjs
@@ -4,24 +4,11 @@
  */
 const fs = require("fs");
 const path = require("path");
-const ts = require(path.join(__dirname, "..", "..", "config", "node_modules", "typescript"));
+const { makeLoader } = require("./helper_ts_stub_loader.cjs");
 
-const cache = new Map();
-function loadTs(file) {
-  const full = path.resolve(file);
-  if (cache.has(full)) return cache.get(full);
-  const js = ts.transpileModule(fs.readFileSync(full, "utf8"), {
-    compilerOptions: { module: ts.ModuleKind.CommonJS, target: ts.ScriptTarget.ES2020 },
-  }).outputText;
-  const box = { exports: {} };
-  cache.set(full, box.exports);
-  const localRequire = (request) => {
-    if (request.startsWith(".")) return loadTs(path.join(path.dirname(full), `${request}.ts`));
-    return require(request);
-  };
-  new Function("exports", "module", "require", js)(box.exports, box, localRequire);
-  return box.exports;
-}
+const { loadTs } = makeLoader({
+  root: path.join(__dirname, "..", ".."),
+});
 
 const ground = loadTs(
   path.join(__dirname, "..", "..", "B05_Profile", "logic", "B05_Profile_Grade_Ground.ts"),
diff --git a/resources/tester/helper_472_save_warnings.cjs b/resources/tester/helper_472_save_warnings.cjs
index e1c90c6d0..3b1dbd0f1 100644
--- a/resources/tester/helper_472_save_warnings.cjs
+++ b/resources/tester/helper_472_save_warnings.cjs
@@ -3,24 +3,15 @@
  */
 const fs = require("fs");
 const path = require("path");
-const ts = require(path.join(__dirname, "..", "..", "config", "node_modules", "typescript"));
+const { makeLoader } = require("./helper_ts_stub_loader.cjs");
 
-const cache = new Map();
-function loadTs(file) {
-  const full = path.resolve(file);
-  if (cache.has(full)) return cache.get(full);
-  const js = ts.transpileModule(fs.readFileSync(full, "utf8"), {
-    compilerOptions: { module: ts.ModuleKind.CommonJS, target: ts.ScriptTarget.ES2020 },
-  }).outputText;
-  const box = { exports: {} };
-  cache.set(full, box.exports);
-  const localRequire = (request) =>
+const { loadTs } = makeLoader({
+  root: path.join(__dirname, "..", ".."),
+  requireFor: (full) => (request) =>
     request.startsWith(".")
       ? loadTs(path.join(path.dirname(full), `${request}.ts`))
-      : require(request);
-  new Function("exports", "module", "require", js)(box.exports, box, localRequire);
-  return box.exports;
-}
+      : require(request),
+});
 
 const align = loadTs(
   path.join(__dirname, "..", "..", "B05_Profile", "logic", "B05_Profile_UI_Profile_Alignment.ts"),
diff --git a/resources/tester/helper_506_3_b07_save.cjs b/resources/tester/helper_506_3_b07_save.cjs
index cd9db841b..dd4cc0d74 100644
--- a/resources/tester/helper_506_3_b07_save.cjs
+++ b/resources/tester/helper_506_3_b07_save.cjs
@@ -3,7 +3,7 @@
  */
 const fs = require("fs");
 const path = require("path");
-const ts = require(path.join(__dirname, "..", "..", "config", "node_modules", "typescript"));
+const { makeLoader } = require("./helper_ts_stub_loader.cjs");
 
 const B07 = path.join(__dirname, "..", "..", "B07_DesignDetail");
 const calls = [];
@@ -39,14 +39,13 @@ global.localStorage = { removeItem: (key) => calls.push(["drop", key]) };
 global.location = { reload: () => calls.push(["reload"]) };
 global.document = { querySelectorAll: () => [] };
 
-function loadTs(file) {
-  const js = ts.transpileModule(fs.readFileSync(file, "utf8"), {
-    compilerOptions: { module: ts.ModuleKind.CommonJS, target: ts.ScriptTarget.ES2020 },
-  }).outputText;
-  const box = { exports: {} };
-  new Function("exports", "module", "require", js)(box.exports, box, (r) => STUBS[r] ?? {});
-  return box.exports;
-}
+const { loadTs } = makeLoader({
+  root: path.join(__dirname, "..", ".."),
+  cache: false,
+  requireFor: (full) => {
+    return (r) => STUBS[r] ?? {};
+  },
+});
 
 Save = loadTs(path.join(B07, "B07_DesignDetail_UI_Save.ts"));