diff --git a/src/backend/electron/engineAndVvppController.ts b/src/backend/electron/engineAndVvppController.ts
index 634d612885..2dedf1649d 100644
--- a/src/backend/electron/engineAndVvppController.ts
+++ b/src/backend/electron/engineAndVvppController.ts
@@ -15,9 +15,9 @@ import {
   EngineSettingType,
 } from "@/type/preload";
 import {
-  EnginePackage,
+  EngineVariant,
   fetchLatestDefaultEngineInfo,
-  getSuitablePackage,
+  getSuitableVariant,
 } from "@/domain/defaultEngine/latetDefaultEngine";
 import {
   EnvEngineInfoType,
@@ -148,7 +148,7 @@ export class EngineAndVvppController {
   async fetchEngineAndPackageInfosToInstall(): Promise<
     {
       envEngineInfo: EnvEngineInfoType;
-      packageInfo: EnginePackage;
+      packageInfo: EngineVariant;
     }[]
   > {
     // .envのデフォルトエンジン情報のうち、downloadVvppなものを集める
@@ -168,7 +168,7 @@ export class EngineAndVvppController {
         continue;
       }
 
-      const packageInfo = getSuitablePackage(latestInfo);
+      const packageInfo = getSuitableVariant(latestInfo);
       log.info(`Latest default engine version: ${packageInfo.version}`);
 
       // インストール済みだった場合はスキップ
@@ -190,7 +190,7 @@ export class EngineAndVvppController {
   /** VVPPパッケージをダウンロードし、インストールする */
   async downloadAndInstallVvppEngine(
     downloadDir: string,
-    packageInfo: EnginePackage,
+    packageInfo: EngineVariant,
   ) {
     // ダウンロード
     const downloadedPaths = new Array<string>(packageInfo.packages.length);
diff --git a/src/domain/defaultEngine/latetDefaultEngine.ts b/src/domain/defaultEngine/latetDefaultEngine.ts
index a87c04dee3..7315d8f913 100644
--- a/src/domain/defaultEngine/latetDefaultEngine.ts
+++ b/src/domain/defaultEngine/latetDefaultEngine.ts
@@ -5,7 +5,7 @@
 import { z } from "zod";
 
 /** パッケージ情報のスキーマ */
-const enginePackageSchema = z.object({
+const engineVariantSchema = z.object({
   version: z.string(),
   packages: z
     .object({
@@ -16,34 +16,34 @@ const enginePackageSchema = z.object({
     })
     .array(),
 });
-export type EnginePackage = z.infer<typeof enginePackageSchema>;
+export type EngineVariant = z.infer<typeof engineVariantSchema>;
 
-/** デフォルトエンジンの更新情報のスキーマ */
+/** デフォルトエンジンの最新情報のスキーマ */
 const latestDefaultEngineInfoSchema = z.object({
   formatVersion: z.number(),
   windows: z.object({
     x64: z.object({
-      CPU: enginePackageSchema,
-      "GPU/CPU": enginePackageSchema,
+      CPU: engineVariantSchema,
+      "GPU/CPU": engineVariantSchema,
     }),
   }),
   macos: z.object({
     x64: z.object({
-      CPU: enginePackageSchema,
+      CPU: engineVariantSchema,
     }),
     arm64: z.object({
-      CPU: enginePackageSchema,
+      CPU: engineVariantSchema,
     }),
   }),
   linux: z.object({
     x64: z.object({
-      CPU: enginePackageSchema,
-      "GPU/CPU": enginePackageSchema,
+      CPU: engineVariantSchema,
+      "GPU/CPU": engineVariantSchema,
     }),
   }),
 });
 
-/** デフォルトエンジンの更新情報を取得する */
+/** デフォルトエンジンの最新情報を取得する */
 export const fetchLatestDefaultEngineInfo = async (url: string) => {
   const response = await fetch(url);
   return latestDefaultEngineInfoSchema.parse(await response.json());
@@ -53,9 +53,9 @@ export const fetchLatestDefaultEngineInfo = async (url: string) => {
  * 実行環境に合うパッケージを取得する。GPU版があればGPU版を返す。
  * FIXME: どのデバイス版にするかはユーザーが選べるようにするべき。
  */
-export const getSuitablePackage = (
+export const getSuitableVariant = (
   updateInfo: z.infer<typeof latestDefaultEngineInfoSchema>,
-): EnginePackage => {
+): EngineVariant => {
   const platform = process.platform;
   const arch = process.arch;
 
diff --git a/tests/unit/domain/defaultEngine/defaultEngine.node.spec.ts b/tests/unit/domain/defaultEngine/latetDefaultEngine.spec.ts
similarity index 57%
rename from tests/unit/domain/defaultEngine/defaultEngine.node.spec.ts
rename to tests/unit/domain/defaultEngine/latetDefaultEngine.spec.ts
index a6b76c168d..d3b09e4d1b 100644
--- a/tests/unit/domain/defaultEngine/defaultEngine.node.spec.ts
+++ b/tests/unit/domain/defaultEngine/latetDefaultEngine.spec.ts
@@ -1,17 +1,12 @@
-// テスト用のファイルを読み込むのでNode環境で実行する
-
-import path from "path";
-import fs from "fs";
+import latestDefaultEngineInfos from "./latestDefaultEngineInfos.json";
 import { fetchLatestDefaultEngineInfo } from "@/domain/defaultEngine/latetDefaultEngine";
 
-const currentDir = "tests/unit/domain/defaultEngine";
-
 test("fetchLatestDefaultEngineInfo", async () => {
   // テスト用のjsonファイルでfetchをモックする
   // 元ファイルは https://raw.githubusercontent.com/VOICEVOX/voicevox_blog/master/src/generateLatestDefaultEngineInfos.ts
-  const p = path.resolve(currentDir, "latestDefaultEngineInfos.json");
-  const json = fs.readFileSync(p, "utf-8");
-  const spy = vi.spyOn(global, "fetch").mockResolvedValue(new Response(json));
+  const spy = vi
+    .spyOn(global, "fetch")
+    .mockResolvedValue(new Response(JSON.stringify(latestDefaultEngineInfos)));
 
   // 読み込めることを確認
   const infos = await fetchLatestDefaultEngineInfo("https://example.com/");