diff --git a/sample/13-mongo-typeorm/package-lock.json b/sample/13-mongo-typeorm/package-lock.json
index 95015b86d44..53027149647 100644
--- a/sample/13-mongo-typeorm/package-lock.json
+++ b/sample/13-mongo-typeorm/package-lock.json
@@ -1769,6 +1769,16 @@
         "@types/istanbul-lib-report": "*"
       }
     },
+    "@types/jest": {
+      "version": "27.0.1",
+      "resolved": "https://registry.npmjs.org/@types/jest/-/jest-27.0.1.tgz",
+      "integrity": "sha512-HTLpVXHrY69556ozYkcq47TtQJXpcWAWfkoqz+ZGz2JnmZhzlRjprCIyFnetSy8gpDWwTTGBcRVv1J1I1vBrHw==",
+      "dev": true,
+      "requires": {
+        "jest-diff": "^27.0.0",
+        "pretty-format": "^27.0.0"
+      }
+    },
     "@types/json-schema": {
       "version": "7.0.8",
       "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.8.tgz",
diff --git a/sample/13-mongo-typeorm/package.json b/sample/13-mongo-typeorm/package.json
index 6e881db394f..ff8f4b1e9c7 100644
--- a/sample/13-mongo-typeorm/package.json
+++ b/sample/13-mongo-typeorm/package.json
@@ -34,6 +34,7 @@
     "@nestjs/schematics": "8.0.3",
     "@nestjs/testing": "8.0.11",
     "@types/express": "4.17.13",
+    "@types/jest": "27.0.1",
     "@types/node": "14.17.21",
     "@types/supertest": "2.0.11",
     "@typescript-eslint/eslint-plugin": "4.33.0",
@@ -49,5 +50,22 @@
     "ts-node": "10.2.1",
     "tsconfig-paths": "3.11.0",
     "typescript": "4.3.5"
+  },
+  "jest": {
+    "moduleFileExtensions": [
+      "js",
+      "json",
+      "ts"
+    ],
+    "rootDir": "src",
+    "testRegex": ".*\\.spec\\.ts$",
+    "transform": {
+      "^.+\\.(t|j)s$": "ts-jest"
+    },
+    "collectCoverageFrom": [
+      "**/*.(t|j)s"
+    ],
+    "coverageDirectory": "../coverage",
+    "testEnvironment": "node"
   }
 }
diff --git a/sample/13-mongo-typeorm/src/photo/photo.controller.spec.ts b/sample/13-mongo-typeorm/src/photo/photo.controller.spec.ts
new file mode 100644
index 00000000000..6d830d2630d
--- /dev/null
+++ b/sample/13-mongo-typeorm/src/photo/photo.controller.spec.ts
@@ -0,0 +1,68 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { PhotoController } from './photo.controller';
+import { PhotoService } from './photo.service';
+
+describe('Photo Controller', () => {
+  let controller: PhotoController;
+  let service: PhotoService;
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      controllers: [PhotoController],
+      providers: [
+        {
+          provide: PhotoService,
+          useValue: {
+            findAll: jest.fn().mockResolvedValue([
+              {
+                name: 'Photo #1',
+                description: 'Description #1',
+                filename: 'Filename #1',
+                isPublish: true,
+              },
+              {
+                name: 'Photo #2',
+                description: 'Description #2',
+                filename: 'Filename #2',
+                isPublish: true,
+              },
+              {
+                name: 'Photo #3',
+                description: 'Description #3',
+                filename: 'Filename #3',
+                isPublish: false,
+              },
+            ]),
+          },
+        },
+      ],
+    }).compile();
+
+    controller = module.get<PhotoController>(PhotoController);
+    service = module.get<PhotoService>(PhotoService);
+  });
+
+  describe('findAll()', () => {
+    it('should return an array of photos', () => {
+      expect(controller.findAll()).resolves.toEqual([
+        {
+          name: 'Photo #1',
+          description: 'Description #1',
+          filename: 'Filename #1',
+          isPublish: true,
+        },
+        {
+          name: 'Photo #2',
+          description: 'Description #2',
+          filename: 'Filename #2',
+          isPublish: true,
+        },
+        {
+          name: 'Photo #3',
+          description: 'Description #3',
+          filename: 'Filename #3',
+          isPublish: false,
+        },
+      ]);
+    });
+  });
+});
diff --git a/sample/13-mongo-typeorm/src/photo/photo.service.spec.ts b/sample/13-mongo-typeorm/src/photo/photo.service.spec.ts
new file mode 100644
index 00000000000..a47dbc0c6a2
--- /dev/null
+++ b/sample/13-mongo-typeorm/src/photo/photo.service.spec.ts
@@ -0,0 +1,51 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { getRepositoryToken } from '@nestjs/typeorm';
+import { Repository } from 'typeorm';
+import { Photo } from './photo.entity';
+import { PhotoService } from './photo.service';
+
+describe('CatService', () => {
+  let service: PhotoService;
+  let repository: Repository<Photo>;
+
+  const photosArray = [
+    {
+      name: 'Photo #1',
+      description: 'Description #1',
+      filename: 'Filename #1',
+      isPublish: true,
+    },
+    {
+      name: 'Photo #2',
+      description: 'Description #2',
+      filename: 'Filename #2',
+      isPublish: true,
+    },
+  ];
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [
+        PhotoService,
+        {
+          provide: getRepositoryToken(Photo),
+          useValue: {
+            find: jest.fn().mockResolvedValue(photosArray),
+          },
+        },
+      ],
+    }).compile();
+
+    service = module.get<PhotoService>(PhotoService);
+    repository = module.get<Repository<Photo>>(getRepositoryToken(Photo));
+  });
+
+  it('should be defined', () => {
+    expect(service).toBeDefined();
+  });
+
+  it('should return an array of photos', async () => {
+    const photos = await service.findAll();
+    expect(photos).toEqual(photosArray);
+  });
+});