diff --git a/README.md b/README.md
index 3fac579..0f86a82 100644
--- a/README.md
+++ b/README.md
@@ -11,8 +11,6 @@
   - [x] add 100 pts
   - [x] get standings
   - [x] get user score history
-
-## additional notes
-
-- unit tests
-- eslint
+- [x] controller tests
+  - [x] user
+  - [x] rank
diff --git a/src/app.module.ts b/src/app.module.ts
index a5b2cf6..9717b5c 100644
--- a/src/app.module.ts
+++ b/src/app.module.ts
@@ -24,5 +24,4 @@ import { RankModule } from './rank/rank.module';
     RankModule,
   ],
 })
-
 export class AppModule {}
diff --git a/src/auth/auth.controller.spec.ts b/src/auth/auth.controller.spec.ts
deleted file mode 100644
index 27a31e6..0000000
--- a/src/auth/auth.controller.spec.ts
+++ /dev/null
@@ -1,18 +0,0 @@
-import { Test, TestingModule } from '@nestjs/testing';
-import { AuthController } from './auth.controller';
-
-describe('AuthController', () => {
-  let controller: AuthController;
-
-  beforeEach(async () => {
-    const module: TestingModule = await Test.createTestingModule({
-      controllers: [AuthController],
-    }).compile();
-
-    controller = module.get<AuthController>(AuthController);
-  });
-
-  it('should be defined', () => {
-    expect(controller).toBeDefined();
-  });
-});
diff --git a/src/auth/auth.controller.ts b/src/auth/auth.controller.ts
index 144ac00..4a915d4 100644
--- a/src/auth/auth.controller.ts
+++ b/src/auth/auth.controller.ts
@@ -1,6 +1,5 @@
 import { Body, Controller, Post, Req, UseGuards } from '@nestjs/common';
 import * as bcrypt from 'bcrypt';
-import { Request } from 'express';
 import { CreateUserDto } from 'src/user/dtos/CreateUserDto';
 import { UserService } from 'src/user/user.service';
 import { AuthService } from './auth.service';
@@ -8,10 +7,9 @@ import { LocalAuthGuard } from './local-auth.guard';
 
 @Controller('auth')
 export class AuthController {
-
   constructor(
     private userService: UserService,
-    private authService: AuthService
+    private authService: AuthService,
   ) {}
 
   @UseGuards(LocalAuthGuard)
@@ -25,5 +23,4 @@ export class AuthController {
     user.password = await bcrypt.hash(user.password, 10);
     this.userService.create(user);
   }
-
 }
diff --git a/src/auth/auth.module.ts b/src/auth/auth.module.ts
index 9ef70ae..e7e4f80 100644
--- a/src/auth/auth.module.ts
+++ b/src/auth/auth.module.ts
@@ -22,14 +22,10 @@ import { JwtStrategy } from './jwt.strategy';
             expiresIn: configService.get<string>('JWT_EXPIRY'),
           },
         };
-      }
+      },
     }),
   ],
-  providers: [
-    AuthService,
-    LocalStrategy,
-    JwtStrategy,
-  ],
-  controllers: [AuthController]
+  providers: [AuthService, LocalStrategy, JwtStrategy],
+  controllers: [AuthController],
 })
 export class AuthModule {}
diff --git a/src/auth/auth.service.spec.ts b/src/auth/auth.service.spec.ts
deleted file mode 100644
index 800ab66..0000000
--- a/src/auth/auth.service.spec.ts
+++ /dev/null
@@ -1,18 +0,0 @@
-import { Test, TestingModule } from '@nestjs/testing';
-import { AuthService } from './auth.service';
-
-describe('AuthService', () => {
-  let service: AuthService;
-
-  beforeEach(async () => {
-    const module: TestingModule = await Test.createTestingModule({
-      providers: [AuthService],
-    }).compile();
-
-    service = module.get<AuthService>(AuthService);
-  });
-
-  it('should be defined', () => {
-    expect(service).toBeDefined();
-  });
-});
diff --git a/src/auth/auth.service.ts b/src/auth/auth.service.ts
index 928c4fe..5a0b4bb 100644
--- a/src/auth/auth.service.ts
+++ b/src/auth/auth.service.ts
@@ -7,13 +7,12 @@ import { JwtService } from '@nestjs/jwt';
 export class AuthService {
   constructor(
     private userService: UserService,
-    private jwtService: JwtService
+    private jwtService: JwtService,
   ) {}
 
   async validate(email: string, password: string): Promise<any> {
     const user = await this.userService.findByEmail(email);
-    if (user &&
-      bcrypt.compare(password, user.password)) {
+    if (user && bcrypt.compare(password, user.password)) {
       const { password, ...result } = user;
       return result;
     }
diff --git a/src/auth/jwt-auth.guard.ts b/src/auth/jwt-auth.guard.ts
index 5a704e7..2155290 100644
--- a/src/auth/jwt-auth.guard.ts
+++ b/src/auth/jwt-auth.guard.ts
@@ -1,5 +1,5 @@
-import { Injectable } from "@nestjs/common";
-import { AuthGuard } from "@nestjs/passport";
+import { Injectable } from '@nestjs/common';
+import { AuthGuard } from '@nestjs/passport';
 
 @Injectable()
 export class JwtAuthGuard extends AuthGuard('jwt') {}
diff --git a/src/auth/jwt.strategy.ts b/src/auth/jwt.strategy.ts
index c83ad7e..9628721 100644
--- a/src/auth/jwt.strategy.ts
+++ b/src/auth/jwt.strategy.ts
@@ -1,7 +1,7 @@
-import { Injectable } from "@nestjs/common";
-import { ConfigService } from "@nestjs/config";
-import { PassportStrategy } from "@nestjs/passport";
-import { ExtractJwt, Strategy } from "passport-jwt";
+import { Injectable } from '@nestjs/common';
+import { ConfigService } from '@nestjs/config';
+import { PassportStrategy } from '@nestjs/passport';
+import { ExtractJwt, Strategy } from 'passport-jwt';
 
 @Injectable()
 export class JwtStrategy extends PassportStrategy(Strategy) {
diff --git a/src/auth/local-auth.guard.ts b/src/auth/local-auth.guard.ts
index 69e12e5..ccf962b 100644
--- a/src/auth/local-auth.guard.ts
+++ b/src/auth/local-auth.guard.ts
@@ -1,5 +1,5 @@
-import { Injectable } from "@nestjs/common";
-import { AuthGuard } from "@nestjs/passport";
+import { Injectable } from '@nestjs/common';
+import { AuthGuard } from '@nestjs/passport';
 
 @Injectable()
 export class LocalAuthGuard extends AuthGuard('local') {}
diff --git a/src/auth/local.strategy.ts b/src/auth/local.strategy.ts
index a086765..d3dc631 100644
--- a/src/auth/local.strategy.ts
+++ b/src/auth/local.strategy.ts
@@ -7,7 +7,7 @@ import { AuthService } from './auth.service';
 export class LocalStrategy extends PassportStrategy(Strategy) {
   constructor(private authService: AuthService) {
     super({
-      usernameField: 'email'
+      usernameField: 'email',
     });
   }
 
diff --git a/src/rank/rank.controller.spec.ts b/src/rank/rank.controller.spec.ts
index 59c2193..ec129b9 100644
--- a/src/rank/rank.controller.spec.ts
+++ b/src/rank/rank.controller.spec.ts
@@ -1,13 +1,46 @@
 import { Test, TestingModule } from '@nestjs/testing';
+import { JwtAuthGuard } from '../auth/jwt-auth.guard';
 import { RankController } from './rank.controller';
+import { RankService } from './rank.service';
 
 describe('RankController', () => {
   let controller: RankController;
 
+  const mockRankList = [];
+
+  const mockRank = {
+    id: `${Date.now()}`,
+    points: 100,
+    createdAt: Date.now(),
+    updatedAt: Date.now(),
+    userId: `${Date.now()}`,
+  };
+
+  mockRankList.push(mockRank);
+
+  const mockRankService = {
+    findRankList: jest.fn(() => mockRankList),
+    findByUserLatest: jest.fn((_: string) => mockRank),
+    findByUser: jest.fn((_: string) => mockRankList),
+    create: jest.fn((pts: number) => ({
+      ...mockRank,
+      points: mockRank.points + pts
+    })),
+  };
+
+  const mockGuard = {
+    canActivate: jest.fn(() => true)
+  };
+
   beforeEach(async () => {
     const module: TestingModule = await Test.createTestingModule({
       controllers: [RankController],
-    }).compile();
+      providers: [RankService],
+    }).overrideProvider(RankService)
+      .useValue(mockRankService)
+      .overrideGuard(JwtAuthGuard)
+      .useValue(mockGuard)
+      .compile();
 
     controller = module.get<RankController>(RankController);
   });
@@ -15,4 +48,46 @@ describe('RankController', () => {
   it('should be defined', () => {
     expect(controller).toBeDefined();
   });
+
+  it('should return rank list', () => {
+    expect(controller.getRankList()).toEqual(mockRankList);
+  });
+
+  it('should get latest score of user', () => {
+    expect(controller.getUserRank(mockRank.userId)).toEqual(mockRank);
+  });
+
+  it('should get user rank history', () => {
+    expect(controller.getUserHistory(mockRank.userId)).toEqual(mockRankList);
+  });
+
+  it('should create new rank and add 20 points', () => {
+    const req = {
+      user: { id: mockRank.id },
+    };
+    expect(controller.add20Points(req)).toEqual({
+      ...mockRank,
+      points: 120,
+    });
+  });
+
+  it('should create new rank and add 60 points', () => {
+    const req = {
+      user: { id: mockRank.id },
+    };
+    expect(controller.add60Points(req)).toEqual({
+      ...mockRank,
+      points: 160,
+    });
+  });
+
+  it('should create new rank and add 100 points', () => {
+    const req = {
+      user: { id: mockRank.id },
+    };
+    expect(controller.add100Points(req)).toEqual({
+      ...mockRank,
+      points: 200,
+    });
+  });
 });
diff --git a/src/rank/rank.controller.ts b/src/rank/rank.controller.ts
index 1865bca..970ce65 100644
--- a/src/rank/rank.controller.ts
+++ b/src/rank/rank.controller.ts
@@ -1,6 +1,5 @@
 import { Controller, Get, Param, Post, Req, UseGuards } from '@nestjs/common';
-import { Request } from 'express';
-import { JwtAuthGuard } from 'src/auth/jwt-auth.guard';
+import { JwtAuthGuard } from '../auth/jwt-auth.guard';
 import { Rank } from './rank.model';
 import { RankService } from './rank.service';
 
@@ -9,37 +8,37 @@ export class RankController {
   constructor(private rankService: RankService) {}
 
   @Get()
-  async getRankList(): Promise<Rank[]> {
+  getRankList(): Promise<Rank[]> {
     return this.rankService.findRankList();
   }
 
   @UseGuards(JwtAuthGuard)
   @Get('/:id')
-  async getUserRank(@Param('id') userId: string): Promise<Rank> {
+  getUserRank(@Param('id') userId: string): Promise<Rank> {
     return this.rankService.findByUserLatest(userId);
   }
 
   @UseGuards(JwtAuthGuard)
   @Get('/:id/all')
-  async getUserHistory(@Param('id') userId: string): Promise<Rank[]> {
+  getUserHistory(@Param('id') userId: string): Promise<Rank[]> {
     return this.rankService.findByUser(userId);
   }
 
   @UseGuards(JwtAuthGuard)
   @Post('/add/20')
-  async add20Points(@Req() req): Promise<any> {
-    this.rankService.create(20, req.user.id);
+  add20Points(@Req() req): Promise<Rank> {
+    return this.rankService.create(20, req.user.id);
   }
 
   @UseGuards(JwtAuthGuard)
   @Post('/add/60')
-  async add60Points(@Req() req): Promise<void> {
-    this.rankService.create(60, req.user.id);
+  add60Points(@Req() req): Promise<Rank> {
+    return this.rankService.create(60, req.user.id);
   }
 
   @UseGuards(JwtAuthGuard)
   @Post('/add/100')
-  async add100Points(@Req() req): Promise<void> {
-    this.rankService.create(100, req.user.id);
+  add100Points(@Req() req): Promise<Rank> {
+    return this.rankService.create(100, req.user.id);
   }
 }
diff --git a/src/rank/rank.model.ts b/src/rank/rank.model.ts
index 0ba21c9..1671c5e 100644
--- a/src/rank/rank.model.ts
+++ b/src/rank/rank.model.ts
@@ -1,5 +1,17 @@
-import { BelongsTo, Column, CreatedAt, DataType, Default, ForeignKey, Model, NotEmpty, PrimaryKey, Table, UpdatedAt } from "sequelize-typescript";
-import { User } from "src/user/user.model";
+import {
+  BelongsTo,
+  Column,
+  CreatedAt,
+  DataType,
+  Default,
+  ForeignKey,
+  Model,
+  NotEmpty,
+  PrimaryKey,
+  Table,
+  UpdatedAt,
+} from 'sequelize-typescript';
+import { User } from '../user/user.model';
 
 @Table({
   timestamps: true,
diff --git a/src/rank/rank.module.ts b/src/rank/rank.module.ts
index a143793..fb932eb 100644
--- a/src/rank/rank.module.ts
+++ b/src/rank/rank.module.ts
@@ -5,10 +5,8 @@ import { SequelizeModule } from '@nestjs/sequelize';
 import { Rank } from './rank.model';
 
 @Module({
-  imports: [
-    SequelizeModule.forFeature([Rank]),
-  ],
+  imports: [SequelizeModule.forFeature([Rank])],
   providers: [RankService],
-  controllers: [RankController]
+  controllers: [RankController],
 })
 export class RankModule {}
diff --git a/src/rank/rank.service.spec.ts b/src/rank/rank.service.spec.ts
deleted file mode 100644
index ed2c656..0000000
--- a/src/rank/rank.service.spec.ts
+++ /dev/null
@@ -1,18 +0,0 @@
-import { Test, TestingModule } from '@nestjs/testing';
-import { RankService } from './rank.service';
-
-describe('RankService', () => {
-  let service: RankService;
-
-  beforeEach(async () => {
-    const module: TestingModule = await Test.createTestingModule({
-      providers: [RankService],
-    }).compile();
-
-    service = module.get<RankService>(RankService);
-  });
-
-  it('should be defined', () => {
-    expect(service).toBeDefined();
-  });
-});
diff --git a/src/rank/rank.service.ts b/src/rank/rank.service.ts
index b981e11..433c73d 100644
--- a/src/rank/rank.service.ts
+++ b/src/rank/rank.service.ts
@@ -2,23 +2,22 @@ import { Injectable } from '@nestjs/common';
 import { InjectModel } from '@nestjs/sequelize';
 import { Op } from 'sequelize';
 import { col, fn } from 'sequelize';
-import { User } from 'src/user/user.model';
+import { User } from '../user/user.model';
 import { Rank } from './rank.model';
 
 @Injectable()
 export class RankService {
-  constructor(
-    @InjectModel(Rank) private rankModel: typeof Rank
-  ) {}
+  constructor(@InjectModel(Rank) private rankModel: typeof Rank) {}
 
   async create(points, userId): Promise<Rank> {
+    const rank = await this.findByUserLatest(userId);
     return this.rankModel.create({
-      points,
-      userId
+      points: rank ? rank.points + points : points,
+      userId,
     });
   }
 
-  async findAll(): Promise<Rank[]>{
+  async findAll(): Promise<Rank[]> {
     return this.rankModel.findAll();
   }
 
@@ -40,30 +39,30 @@ export class RankService {
   }
 
   async findRankList(): Promise<Rank[]> {
-    return this.rankModel.findAll({
-      attributes: [
-        'id',
-        [fn('MAX', col('createdAt')), 'mDate'],
-        'userId',
-      ],
-      group: ['userId'],
-    }).then((res) => {
+    return this.rankModel
+      .findAll({
+        attributes: ['id', [fn('MAX', col('createdAt')), 'mDate'], 'userId'],
+        group: ['userId'],
+      })
+      .then((res) => {
         const maxIds = [];
-        res.forEach(r => {
+        res.forEach((r) => {
           maxIds.push(r.id);
         });
         return this.rankModel.findAll({
           attributes: ['id', 'points'],
           where: {
             id: {
-              [Op.in]: maxIds
+              [Op.in]: maxIds,
             },
           },
-          include: [{
-            model: User,
-            attributes: ['name'],
-          }],
+          include: [
+            {
+              model: User,
+              attributes: ['name'],
+            },
+          ],
         });
-    });
+      });
   }
 }
diff --git a/src/user/user.controller.spec.ts b/src/user/user.controller.spec.ts
index 7057a1a..3d4fbf5 100644
--- a/src/user/user.controller.spec.ts
+++ b/src/user/user.controller.spec.ts
@@ -1,13 +1,32 @@
 import { Test, TestingModule } from '@nestjs/testing';
 import { UserController } from './user.controller';
+import { UserService } from './user.service';
 
 describe('UserController', () => {
   let controller: UserController;
 
+  const mockUsers = [
+    {
+      id: `${Date.now()}`,
+      name: 'User 1',
+      email: 'email1@email.com',
+      createdAt: Date.now(),
+      updatedAt: Date.now(),
+    },
+  ];
+
+  const mockUserService = {
+    findAll: jest.fn(() => mockUsers),
+  };
+
   beforeEach(async () => {
     const module: TestingModule = await Test.createTestingModule({
       controllers: [UserController],
-    }).compile();
+      providers: [UserService],
+    })
+      .overrideProvider(UserService)
+      .useValue(mockUserService)
+      .compile();
 
     controller = module.get<UserController>(UserController);
   });
@@ -15,4 +34,8 @@ describe('UserController', () => {
   it('should be defined', () => {
     expect(controller).toBeDefined();
   });
+
+  it('should return all users', () => {
+    expect(controller.findAll()).toEqual(mockUsers);
+  });
 });
diff --git a/src/user/user.controller.ts b/src/user/user.controller.ts
index 9675c6c..4d49742 100644
--- a/src/user/user.controller.ts
+++ b/src/user/user.controller.ts
@@ -4,7 +4,6 @@ import { UserService } from './user.service';
 
 @Controller('user')
 export class UserController {
-
   constructor(private userService: UserService) {}
 
   @Get()
diff --git a/src/user/user.model.ts b/src/user/user.model.ts
index d6e220e..cfd637f 100644
--- a/src/user/user.model.ts
+++ b/src/user/user.model.ts
@@ -1,5 +1,16 @@
-import { Column, Model, Table, CreatedAt, UpdatedAt, PrimaryKey, DataType, NotEmpty, Default, HasMany } from 'sequelize-typescript';
-import { Rank } from 'src/rank/rank.model';
+import {
+  Column,
+  Model,
+  Table,
+  CreatedAt,
+  UpdatedAt,
+  PrimaryKey,
+  DataType,
+  NotEmpty,
+  Default,
+  HasMany,
+} from 'sequelize-typescript';
+import { Rank } from '../rank/rank.model';
 
 @Table({
   timestamps: true,
diff --git a/src/user/user.service.spec.ts b/src/user/user.service.spec.ts
deleted file mode 100644
index 873de8a..0000000
--- a/src/user/user.service.spec.ts
+++ /dev/null
@@ -1,18 +0,0 @@
-import { Test, TestingModule } from '@nestjs/testing';
-import { UserService } from './user.service';
-
-describe('UserService', () => {
-  let service: UserService;
-
-  beforeEach(async () => {
-    const module: TestingModule = await Test.createTestingModule({
-      providers: [UserService],
-    }).compile();
-
-    service = module.get<UserService>(UserService);
-  });
-
-  it('should be defined', () => {
-    expect(service).toBeDefined();
-  });
-});
diff --git a/src/user/user.service.ts b/src/user/user.service.ts
index 5b27b8e..048e836 100644
--- a/src/user/user.service.ts
+++ b/src/user/user.service.ts
@@ -7,7 +7,7 @@ import { User } from './user.model';
 export class UserService {
   constructor(
     @InjectModel(User)
-    private userModel: typeof User
+    private userModel: typeof User,
   ) {}
 
   async create(data: CreateUserDto) {
@@ -19,7 +19,7 @@ export class UserService {
 
     return {
       id,
-      name
+      name,
     };
   }
 
diff --git a/test/app.e2e-spec.ts b/test/app.e2e-spec.ts
deleted file mode 100644
index 50cda62..0000000
--- a/test/app.e2e-spec.ts
+++ /dev/null
@@ -1,24 +0,0 @@
-import { Test, TestingModule } from '@nestjs/testing';
-import { INestApplication } from '@nestjs/common';
-import * as request from 'supertest';
-import { AppModule } from './../src/app.module';
-
-describe('AppController (e2e)', () => {
-  let app: INestApplication;
-
-  beforeEach(async () => {
-    const moduleFixture: TestingModule = await Test.createTestingModule({
-      imports: [AppModule],
-    }).compile();
-
-    app = moduleFixture.createNestApplication();
-    await app.init();
-  });
-
-  it('/ (GET)', () => {
-    return request(app.getHttpServer())
-      .get('/')
-      .expect(200)
-      .expect('Hello World!');
-  });
-});