diff --git a/src/auth/auth.controller.spec.ts b/src/auth/auth.controller.spec.ts
index 3210d10..8058747 100644
--- a/src/auth/auth.controller.spec.ts
+++ b/src/auth/auth.controller.spec.ts
@@ -7,7 +7,6 @@ import { getRepositoryToken, TypeOrmModule } from "@nestjs/typeorm";
 import { type Request } from "express";
 import { dataSourceJest } from "src/config/data-source";
 import jestConfig from "src/config/jest.config";
-import { jwtAccessConfig } from "src/config/jwt.config";
 import { UserEntity } from "src/user/entities/user.entity";
 import type { CreateUserResponse } from "src/user/responses/create-user-response";
 import { UserService } from "src/user/user.service";
@@ -26,7 +25,7 @@ describe("AuthController", () => {
   let authService: AuthService;
   let userRepository: Repository<UserEntity> | undefined;
 
-  const fakeAccessToken = "mocked_token";
+  const fakeAccessToken = "mocked_access_token";
 
   beforeEach(async () => {
     const module: TestingModule = await Test.createTestingModule({
@@ -37,7 +36,7 @@ describe("AuthController", () => {
         }),
         PassportModule,
         TypeOrmModule.forRoot(dataSourceJest),
-        JwtModule.registerAsync(jwtAccessConfig),
+        JwtModule.register({}),
       ],
       providers: [
         AuthService,
@@ -51,7 +50,7 @@ describe("AuthController", () => {
           provide: JwtService,
           useValue: {
             // 模擬JwtService中的方法
-            sign: jest.fn().mockReturnValue(fakeAccessToken),
+            sign: jest.fn(),
           },
         },
         LocalStrategy,
@@ -112,6 +111,11 @@ describe("AuthController", () => {
           id: 1,
         } as JwtUser,
       } as unknown as Request;
+
+      jest
+        .spyOn(authService, "generateAccessToken")
+        .mockImplementation(async () => fakeAccessToken);
+
       const mockAuthService = jest.spyOn(authService, "login");
 
       const result = await authController.login(request);
diff --git a/src/auth/auth.service.spec.ts b/src/auth/auth.service.spec.ts
index 9d006de..7aa36e5 100644
--- a/src/auth/auth.service.spec.ts
+++ b/src/auth/auth.service.spec.ts
@@ -11,7 +11,6 @@ import { getRepositoryToken, TypeOrmModule } from "@nestjs/typeorm";
 import { validate } from "class-validator";
 import { dataSourceJest } from "src/config/data-source";
 import jestConfig from "src/config/jest.config";
-import { jwtAccessConfig } from "src/config/jwt.config";
 import type { CreateUserDto } from "src/user/dto/create-user.dto";
 import { UserEntity } from "src/user/entities/user.entity";
 import { UserService } from "src/user/user.service";
@@ -24,10 +23,9 @@ import { LocalStrategy } from "./local/local.strategy";
 describe("AuthService", () => {
   let authService: AuthService;
   let userService: UserService;
-  let jwtService: JwtService;
   let userRepository: Repository<UserEntity> | undefined;
 
-  const fakeAccessToken = "mocked_token";
+  const fakeAccessToken = "mocked_access_token";
 
   beforeEach(async () => {
     const module: TestingModule = await Test.createTestingModule({
@@ -37,7 +35,7 @@ describe("AuthService", () => {
         }),
         PassportModule,
         TypeOrmModule.forRoot(dataSourceJest),
-        JwtModule.registerAsync(jwtAccessConfig),
+        JwtModule.register({}),
       ],
       providers: [
         AuthService,
@@ -51,7 +49,7 @@ describe("AuthService", () => {
           provide: JwtService,
           useValue: {
             // 模擬JwtService中的方法
-            sign: jest.fn().mockReturnValue(fakeAccessToken),
+            sign: jest.fn(),
           },
         },
         LocalStrategy,
@@ -59,7 +57,6 @@ describe("AuthService", () => {
       ],
     }).compile();
 
-    jwtService = module.get<JwtService>(JwtService);
     userService = module.get<UserService>(UserService);
     authService = module.get<AuthService>(AuthService);
     userRepository = module.get<Repository<UserEntity>>(
@@ -164,15 +161,16 @@ describe("AuthService", () => {
         email: "test@example.com",
         id: 1,
       };
-      const expectedToken = fakeAccessToken;
       const expectedStatusCode = HttpStatus.CREATED;
 
-      jest.spyOn(jwtService, "sign").mockReturnValue(expectedToken);
+      jest
+        .spyOn(authService, "generateAccessToken")
+        .mockImplementation(async () => fakeAccessToken);
 
       const result = await authService.login(mockUser);
 
       expect(result).toEqual({
-        accessToken: expectedToken,
+        accessToken: fakeAccessToken,
         statusCode: expectedStatusCode,
       });
     });
diff --git a/src/auth/jwt/jwt-access.guard.spec.ts b/src/auth/jwt/jwt-access.guard.spec.ts
index eea22b0..cc26242 100644
--- a/src/auth/jwt/jwt-access.guard.spec.ts
+++ b/src/auth/jwt/jwt-access.guard.spec.ts
@@ -1,10 +1,9 @@
 import { type ExecutionContext, UnauthorizedException } from "@nestjs/common";
-import { ConfigModule } from "@nestjs/config";
+import { ConfigModule, ConfigService } from "@nestjs/config";
 import { JwtModule, JwtService } from "@nestjs/jwt";
 import { PassportModule } from "@nestjs/passport";
 import { Test } from "@nestjs/testing";
 import jestConfig from "src/config/jest.config";
-import { jwtAccessConfig } from "src/config/jwt.config";
 
 import { JwtAccessGuard } from "./jwt-access.guard";
 import { JwtAccessStrategy } from "./jwt-access.strategy";
@@ -12,6 +11,7 @@ import { JwtAccessStrategy } from "./jwt-access.strategy";
 describe("JwtAccessGuard", () => {
   let jwtAccessGuard: JwtAccessGuard;
   let jwtService: JwtService;
+  let configService: ConfigService;
 
   beforeEach(async () => {
     const moduleRef = await Test.createTestingModule({
@@ -20,13 +20,14 @@ describe("JwtAccessGuard", () => {
           load: [jestConfig],
         }),
         PassportModule,
-        JwtModule.registerAsync(jwtAccessConfig),
+        JwtModule.register({}),
       ],
       providers: [JwtAccessGuard, JwtAccessStrategy, JwtService],
     }).compile();
 
     jwtAccessGuard = moduleRef.get<JwtAccessGuard>(JwtAccessGuard);
     jwtService = moduleRef.get<JwtService>(JwtService);
+    configService = moduleRef.get<ConfigService>(ConfigService);
   });
 
   it("should be defined", () => {
@@ -35,7 +36,11 @@ describe("JwtAccessGuard", () => {
 
   it("should return true for a valid JWT", async () => {
     const payload = { email: "testuser", id: 1 };
-    const token = jwtService.sign(payload);
+    const secret: string | undefined = configService.get("jwtSecret.access");
+    const token = jwtService.sign(payload, {
+      expiresIn: "1h",
+      secret,
+    });
 
     const response = {};
     const context: ExecutionContext = {
@@ -55,7 +60,8 @@ describe("JwtAccessGuard", () => {
 
   it("should throw an error for an expired JWT", async () => {
     const payload = { email: "testuser", id: 1 };
-    const token = jwtService.sign(payload, { expiresIn: 0 });
+    const secret: string | undefined = configService.get("jwtSecret.access");
+    const token = jwtService.sign(payload, { expiresIn: 0, secret });
 
     const response = {};
     const context: ExecutionContext = {
diff --git a/src/config/jwt.config.ts b/src/config/jwt.config.ts
deleted file mode 100644
index 4c1bd2b..0000000
--- a/src/config/jwt.config.ts
+++ /dev/null
@@ -1,11 +0,0 @@
-import { ConfigModule, ConfigService } from "@nestjs/config";
-import { type JwtModuleAsyncOptions } from "@nestjs/jwt";
-
-export const jwtAccessConfig: JwtModuleAsyncOptions = {
-  imports: [ConfigModule],
-  inject: [ConfigService],
-  useFactory: (configService: ConfigService) => ({
-    secret: configService.get("jwtSecret.access"),
-    signOptions: { expiresIn: "1d" },
-  }),
-};
diff --git a/src/swagger/swagger.module.ts b/src/swagger/swagger.module.ts
index 8271574..64678de 100644
--- a/src/swagger/swagger.module.ts
+++ b/src/swagger/swagger.module.ts
@@ -8,7 +8,6 @@ import { AuthModule } from "src/auth/auth.module";
 import { JwtAccessStrategy } from "src/auth/jwt/jwt-access.strategy";
 import { dataSourceJest } from "src/config/data-source";
 import jestConfig from "src/config/jest.config";
-import { jwtAccessConfig } from "src/config/jwt.config";
 import { UserModule } from "src/user/user.module";
 
 @Module({
@@ -21,7 +20,7 @@ import { UserModule } from "src/user/user.module";
     }),
     UserModule,
     AuthModule,
-    JwtModule.registerAsync(jwtAccessConfig),
+    JwtModule.register({}),
   ],
   providers: [AppService, JwtAccessStrategy],
 })