diff --git a/src/auth/test/auth.service.spec.ts b/src/auth/test/auth.service.spec.ts
index 35e950b..5b0efcf 100644
--- a/src/auth/test/auth.service.spec.ts
+++ b/src/auth/test/auth.service.spec.ts
@@ -8,6 +8,7 @@ import config from '../../common/config';
 import * as bcrypt from 'bcrypt';
 import { Prisma } from '@prisma/client';
 import { ConflictException, UnauthorizedException } from '@nestjs/common';
+import mockUser from '../../../test/mockUser';
 
 describe('AuthService', () => {
   let service: AuthService;
@@ -17,16 +18,6 @@ describe('AuthService', () => {
   let spyJwtService: JwtService;
   let spyPrismaService: DeepMockProxy<PrismaService>;
 
-  const date = new Date();
-  const user = {
-    id: 'fcd2fa2d-f5f4-4ed0-9d75-f3ca6ddd4c21',
-    name: 'John',
-    email: 'john@doe.com',
-    passwordHash: 'hashedPassword',
-    createdAt: date,
-    updatedAt: date,
-  };
-
   beforeEach(async () => {
     const module: TestingModule = await Test.createTestingModule({
       imports: [
@@ -70,8 +61,8 @@ describe('AuthService', () => {
     };
 
     it('should create a new user', async () => {
-      jest.spyOn(bcrypt, 'hash').mockResolvedValue(user.passwordHash);
-      spyPrismaService.user.create.mockResolvedValue(user);
+      jest.spyOn(bcrypt, 'hash').mockResolvedValue(mockUser.passwordHash);
+      spyPrismaService.user.create.mockResolvedValue(mockUser);
 
       await service.signup(signUpData);
       expect(spyPrismaService.user.create).toHaveBeenCalledTimes(1);
@@ -79,7 +70,7 @@ describe('AuthService', () => {
         data: {
           name: signUpData.name,
           email: signUpData.email,
-          passwordHash: user.passwordHash,
+          passwordHash: mockUser.passwordHash,
         },
         select: null,
       });
@@ -110,14 +101,14 @@ describe('AuthService', () => {
     it('should allow an user to login', async () => {
       jest.spyOn(bcrypt, 'compareSync').mockResolvedValue(true);
       jest.spyOn(spyJwtService, 'signAsync').mockResolvedValue(testJWT);
-      spyPrismaService.user.findFirst.mockResolvedValue(user);
+      spyPrismaService.user.findFirst.mockResolvedValue(mockUser);
 
       expect(await service.login(loginInfo)).toStrictEqual(testJWT);
       expect(spyPrismaService.user.findFirst).toHaveBeenCalledTimes(1);
     });
 
     it('should retrieve an unauthorized error', async () => {
-      spyPrismaService.user.findFirst.mockResolvedValue(user);
+      spyPrismaService.user.findFirst.mockResolvedValue(mockUser);
       jest.spyOn(bcrypt, 'compareSync').mockResolvedValue(false);
 
       await expect(service.login(loginInfo)).rejects.toThrow(
@@ -128,13 +119,13 @@ describe('AuthService', () => {
 
   describe('validateUser', () => {
     const payload = {
-      id: user.id,
-      name: user.name,
-      email: user.email,
+      id: mockUser.id,
+      name: mockUser.name,
+      email: mockUser.email,
     };
     it('should return a valid user', async () => {
-      spyPrismaService.user.findUnique.mockResolvedValue(user);
-      expect(await service.validateUser(payload)).toStrictEqual(user);
+      spyPrismaService.user.findUnique.mockResolvedValue(mockUser);
+      expect(await service.validateUser(payload)).toStrictEqual(mockUser);
     });
 
     it('should throw an unauthorized error', async () => {
diff --git a/src/user/test/user.service.spec.ts b/src/user/test/user.service.spec.ts
new file mode 100644
index 0000000..41f00e9
--- /dev/null
+++ b/src/user/test/user.service.spec.ts
@@ -0,0 +1,59 @@
+import { DeepMockProxy, mockDeep } from 'jest-mock-extended';
+import { UserService } from '../user.service';
+import { PrismaService } from '../../common/services/prisma.service';
+import { Test, TestingModule } from '@nestjs/testing';
+import { NotFoundException } from '@nestjs/common';
+import mockUser from '../../../test/mockUser';
+
+describe('UserService', () => {
+  let service: UserService;
+  let spyPrismaService: DeepMockProxy<PrismaService>;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [
+        UserService,
+        {
+          provide: PrismaService,
+          useFactory: () => mockDeep<PrismaService>(),
+        },
+      ],
+    }).compile();
+
+    service = module.get<UserService>(UserService);
+    spyPrismaService = module.get(
+      PrismaService,
+    ) as DeepMockProxy<PrismaService>;
+  });
+
+  it('should be defined', () => {
+    expect(service).toBeDefined();
+  });
+
+  describe('getUserById', () => {
+    it('should return the user with the requested id', async () => {
+      spyPrismaService.user.findUnique.mockResolvedValue(mockUser);
+
+      expect(await service.getUserById(mockUser.id)).toStrictEqual(mockUser);
+      expect(spyPrismaService.user.findUnique).toHaveBeenCalledTimes(1);
+      expect(spyPrismaService.user.findUnique).toHaveBeenCalledWith({
+        where: { id: mockUser.id },
+      });
+    });
+
+    it('should return the user from the database', async () => {
+      spyPrismaService.user.findUnique.mockResolvedValue(mockUser);
+
+      expect(await service.getUserById(mockUser.id)).toStrictEqual(mockUser);
+    });
+
+    it('should throw a not found exception', async () => {
+      spyPrismaService.user.findUnique.mockResolvedValue(null);
+
+      await expect(service.getUserById(mockUser.id)).rejects.toThrow(
+        NotFoundException,
+      );
+      expect(spyPrismaService.user.findUnique).toHaveBeenCalledTimes(1);
+    });
+  });
+});
diff --git a/test/mockUser.ts b/test/mockUser.ts
new file mode 100644
index 0000000..44a8eb1
--- /dev/null
+++ b/test/mockUser.ts
@@ -0,0 +1,11 @@
+const date = new Date();
+const mockUser = {
+  id: 'fcd2fa2d-f5f4-4ed0-9d75-f3ca6ddd4c21',
+  name: 'John',
+  email: 'john@doe.com',
+  passwordHash: 'hashedPassword',
+  createdAt: date,
+  updatedAt: date,
+};
+
+export default mockUser;