diff --git a/src/main/java/ita/tinybite/domain/user/controller/UserController.java b/src/main/java/ita/tinybite/domain/user/controller/UserController.java
index 5e5ca01..d1d72a6 100644
--- a/src/main/java/ita/tinybite/domain/user/controller/UserController.java
+++ b/src/main/java/ita/tinybite/domain/user/controller/UserController.java
@@ -9,7 +9,7 @@
 import static ita.tinybite.global.response.APIResponse.success;
 
 @RestController
-@RequestMapping("/api/v1/user/me")
+@RequestMapping("/api/v1/user")
 public class UserController {
 
     private final UserService userService;
@@ -18,27 +18,33 @@ public UserController(UserService userService) {
         this.userService = userService;
     }
 
-    @GetMapping
+    @GetMapping("/me")
     public APIResponse<?> getUser() {
         return success(userService.getUser());
     }
 
-    @PatchMapping
+    @PatchMapping("/me")
     public APIResponse<?> updateUser(@Valid @RequestBody UpdateUserReqDto req) {
         userService.updateUser(req);
         return success();
     }
 
-    @PatchMapping("/location")
+    @PatchMapping("/me/location")
     public APIResponse<?> updateLocation(@RequestParam(defaultValue = "37.3623504988728") String latitude,
                                          @RequestParam(defaultValue = "127.117057453619") String longitude) {
         userService.updateLocation(latitude, longitude);
         return success();
     }
 
-    @DeleteMapping
+    @DeleteMapping("/me")
     public APIResponse<?> deleteUser() {
         userService.deleteUser();
         return success();
     }
+
+    @GetMapping("/nickname/check")
+    public APIResponse<?> validateNickname(@RequestParam String nickname) {
+        userService.validateNickname(nickname);
+        return success();
+    }
 }
diff --git a/src/main/java/ita/tinybite/domain/user/entity/User.java b/src/main/java/ita/tinybite/domain/user/entity/User.java
index f817069..8672f0c 100644
--- a/src/main/java/ita/tinybite/domain/user/entity/User.java
+++ b/src/main/java/ita/tinybite/domain/user/entity/User.java
@@ -18,13 +18,16 @@
 public class User extends BaseEntity {
 
     @Id
-    @GeneratedValue
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     @Comment("uid")
     private Long userId;
 
     @Column(nullable = false, length = 50, unique = true)
     private String email;
 
+    @Column(nullable = false, length = 30, unique = true)
+    private String nickname;
+
     @Column(length = 50)
     private String phone;
 
@@ -36,9 +39,6 @@ public class User extends BaseEntity {
     @Column(nullable = false)
     private UserStatus status;
 
-    @Column(nullable = false, length = 100)
-    private String nickname;
-
     @Column(nullable = false, length = 100)
     private String location;
 
diff --git a/src/main/java/ita/tinybite/domain/user/service/UserService.java b/src/main/java/ita/tinybite/domain/user/service/UserService.java
index 5b04ee6..a71130e 100644
--- a/src/main/java/ita/tinybite/domain/user/service/UserService.java
+++ b/src/main/java/ita/tinybite/domain/user/service/UserService.java
@@ -5,6 +5,8 @@
 import ita.tinybite.domain.user.dto.res.UserResDto;
 import ita.tinybite.domain.user.entity.User;
 import ita.tinybite.domain.user.repository.UserRepository;
+import ita.tinybite.global.exception.BusinessException;
+import ita.tinybite.global.exception.errorcode.AuthErrorCode;
 import ita.tinybite.global.location.LocationService;
 import org.springframework.stereotype.Service;
 
@@ -43,4 +45,8 @@ public void deleteUser() {
         userRepository.delete(securityProvider.getCurrentUser());
     }
 
+    public void validateNickname(String nickname) {
+        if(userRepository.existsByNickname(nickname))
+            throw BusinessException.of(AuthErrorCode.DUPLICATED_NICKNAME);
+    }
 }
diff --git a/src/main/java/ita/tinybite/global/config/SwaggerConfig.java b/src/main/java/ita/tinybite/global/config/SwaggerConfig.java
index a120ca4..6c6fdc8 100644
--- a/src/main/java/ita/tinybite/global/config/SwaggerConfig.java
+++ b/src/main/java/ita/tinybite/global/config/SwaggerConfig.java
@@ -18,7 +18,6 @@ public class SwaggerConfig {
     @Bean
     public OpenAPI openAPI() {
         return new OpenAPI()
-                .servers(List.of(new Server().url("https://growinserver.shop")))
                 .addSecurityItem(new SecurityRequirement().addList("BearerAuth"))
                 .components(
                         new Components()
diff --git a/src/main/java/ita/tinybite/global/exception/errorcode/AuthErrorCode.java b/src/main/java/ita/tinybite/global/exception/errorcode/AuthErrorCode.java
index 5618914..00c7180 100644
--- a/src/main/java/ita/tinybite/global/exception/errorcode/AuthErrorCode.java
+++ b/src/main/java/ita/tinybite/global/exception/errorcode/AuthErrorCode.java
@@ -7,7 +7,11 @@
 public enum AuthErrorCode implements ErrorCode {
 
     INVALID_PHONE_NUMBER(HttpStatus.BAD_REQUEST, "INVALID_PHONE_NUMBER", "유효하지 않은 번호입니다."),
-    INVALID_AUTHCODE(HttpStatus.UNAUTHORIZED, "INVALID_AUTHCODE", "인증코드가 만료되었거나, 일치하지 않습니다.")
+    INVALID_AUTHCODE(HttpStatus.UNAUTHORIZED, "INVALID_AUTHCODE", "인증코드가 일치하지 않습니다."),
+    EXPIRED_AUTH_CODE(HttpStatus.BAD_REQUEST, "EXPIRED_AUTH_CODE", "인증시간이 만료되었습니다."),
+
+    DUPLICATED_NICKNAME(HttpStatus.BAD_REQUEST, "DUPLICATED_NICKNAME", "중복된 닉네임입니다."),
+
     ;
 
     private final HttpStatus httpStatus;
diff --git a/src/main/java/ita/tinybite/global/sms/controller/SmsAuthController.java b/src/main/java/ita/tinybite/global/sms/controller/SmsAuthController.java
index 57d84c9..eba0fa5 100644
--- a/src/main/java/ita/tinybite/global/sms/controller/SmsAuthController.java
+++ b/src/main/java/ita/tinybite/global/sms/controller/SmsAuthController.java
@@ -1,7 +1,5 @@
 package ita.tinybite.global.sms.controller;
 
-import ita.tinybite.global.exception.errorcode.AuthErrorCode;
-import ita.tinybite.global.exception.errorcode.TaskErrorCode;
 import ita.tinybite.global.response.APIResponse;
 import ita.tinybite.global.sms.dto.req.CheckReqDto;
 import ita.tinybite.global.sms.dto.req.SendReqDto;
@@ -11,6 +9,8 @@
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 
+import static ita.tinybite.global.response.APIResponse.success;
+
 @RestController
 @RequestMapping("/api/v1/auth/sms")
 public class SmsAuthController {
@@ -24,12 +24,12 @@ public SmsAuthController(SmsAuthService smsAuthService) {
     @PostMapping("/send")
     public APIResponse<?> send(@RequestBody SendReqDto req) {
         smsAuthService.send(req.phone());
-        return APIResponse.success();
+        return success();
     }
 
     @PostMapping("/check")
     public APIResponse<?> check(@RequestBody CheckReqDto req) {
-        if(smsAuthService.check(req)) return APIResponse.success();
-        return APIResponse.businessError(AuthErrorCode.INVALID_AUTHCODE);
+        smsAuthService.check(req);
+        return success();
     }
 }
diff --git a/src/main/java/ita/tinybite/global/sms/service/SmsAuthService.java b/src/main/java/ita/tinybite/global/sms/service/SmsAuthService.java
index 781ecc0..66daf10 100644
--- a/src/main/java/ita/tinybite/global/sms/service/SmsAuthService.java
+++ b/src/main/java/ita/tinybite/global/sms/service/SmsAuthService.java
@@ -27,7 +27,7 @@ public SmsAuthService(SmsService smsService, RedisTemplate<String, String> redis
     /**
      * 1. 인증코드 생성 <br>
      * 2. 주어진 폰번호로 인증코드 전송 <br>
-     * 3. DB에 {번호, 인증코드}쌍으로 저장 or 메모리에 저장 (ttl 설정 고려하기) <br>
+     * 3. redis에 {번호, 인증코드}쌍으로 저장 (ttl 설정 고려) <br>
      */
     public void send(String phone) {
         validatePhoneNumber(phone);
@@ -40,14 +40,17 @@ public void send(String phone) {
     /**
      * req.phone으로 redis 조회 <br>
      * 조회한 authCode와 요청받은 authcode를 비교 <br>
-     * 같으면 true, 다르면 false <br>
+     * 조회된 authCode가 없을 시, 만료 혹은 요청 X <br>
      */
-    public boolean check(CheckReqDto req) {
+    public void check(CheckReqDto req) {
         validatePhoneNumber(req.phone());
 
         String authCode = redisTemplate.opsForValue().get(req.phone());
-        if(authCode == null) return false;
-        return authCode.equals(req.authCode());
+        if(authCode == null)
+            throw BusinessException.of(AuthErrorCode.EXPIRED_AUTH_CODE);
+
+        if(!authCode.equals(req.authCode()))
+            throw BusinessException.of(AuthErrorCode.INVALID_AUTHCODE);
     }
 
     private void validatePhoneNumber(String phone) {
diff --git a/src/main/resources/application-dev.yaml b/src/main/resources/application-dev.yaml
index 580242a..8410dca 100644
--- a/src/main/resources/application-dev.yaml
+++ b/src/main/resources/application-dev.yaml
@@ -16,7 +16,7 @@ spring:
 
   data:
     redis:
-      host: localhost
+      host: redis
       port: 6379
 
 kakao:
@@ -25,9 +25,4 @@ kakao:
 
 naver:
   client-id: ${NAVER_CLIENT_ID}
-  secret: ${NAVER_CLIENT_SECRET}
-
-jwt:
-  secret: ${JWT_SECRET}
-  access-token-validity: ${JWT_ACCESS_TOKEN_VALIDITY}
-  refresh-token-validity: ${JWT_REFRESH_TOKEN_VALIDITY}
+  secret: ${NAVER_CLIENT_SECRET}
\ No newline at end of file
diff --git a/src/main/resources/application-local.yaml b/src/main/resources/application-local.yaml
index f607a37..9de545a 100644
--- a/src/main/resources/application-local.yaml
+++ b/src/main/resources/application-local.yaml
@@ -33,11 +33,6 @@ naver:
   client-id: ${NAVER_CLIENT_ID}
   secret: ${NAVER_CLIENT_SECRET}
 
-jwt:
-  secret: ${JWT_SECRET}
-  access-token-validity: ${JWT_ACCESS_TOKEN_VALIDITY}
-  refresh-token-validity: ${JWT_REFRESH_TOKEN_VALIDITY}
-
 logging:
   level:
     org.hibernate.SQL: debug
\ No newline at end of file
diff --git a/src/test/java/ita/tinybite/TinyBiteApplicationTests.java b/src/test/java/ita/tinybite/TinyBiteApplicationTests.java
deleted file mode 100644
index 4030bf9..0000000
--- a/src/test/java/ita/tinybite/TinyBiteApplicationTests.java
+++ /dev/null
@@ -1,15 +0,0 @@
-package ita.tinybite;
-
-import org.junit.jupiter.api.Test;
-import org.springframework.boot.test.context.SpringBootTest;
-import org.springframework.test.context.ActiveProfiles;
-
-@SpringBootTest
-@ActiveProfiles("test")
-class TinyBiteApplicationTests {
-
-    @Test
-    void contextLoads() {
-    }
-
-}
diff --git a/src/test/java/ita/tinybite/domain/user/service/UserServiceTest.java b/src/test/java/ita/tinybite/domain/user/service/UserServiceTest.java
new file mode 100644
index 0000000..ae14b5b
--- /dev/null
+++ b/src/test/java/ita/tinybite/domain/user/service/UserServiceTest.java
@@ -0,0 +1,97 @@
+package ita.tinybite.domain.user.service;
+
+import ita.tinybite.domain.user.constant.LoginType;
+import ita.tinybite.domain.user.constant.UserStatus;
+import ita.tinybite.domain.user.dto.req.UpdateUserReqDto;
+import ita.tinybite.domain.user.dto.res.UserResDto;
+import ita.tinybite.domain.user.entity.User;
+import ita.tinybite.domain.user.repository.UserRepository;
+import ita.tinybite.domain.user.service.fake.FakeLocationService;
+import ita.tinybite.domain.user.service.fake.FakeSecurityProvider;
+import ita.tinybite.global.exception.BusinessException;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
+
+import static org.assertj.core.api.Assertions.*;
+
+@DataJpaTest
+class UserServiceTest {
+
+    @Autowired
+    private UserRepository userRepository;
+
+    // Fake 객체
+    private FakeSecurityProvider securityProvider;
+    private FakeLocationService locationService;
+
+    // 테스트 객체
+    private UserService userService;
+
+    @BeforeEach
+    void setUp() {
+        securityProvider = new FakeSecurityProvider(userRepository);
+        locationService = new FakeLocationService();
+        userService = new UserService(securityProvider, userRepository, locationService);
+
+        User user = User.builder()
+                .email("yyytir777@gmail.com")
+                .nickname("임원재")
+                .location("분당구 정자동")
+                .status(UserStatus.ACTIVE)
+                .type(LoginType.KAKAO)
+                .build();
+
+        userRepository.save(user);
+        securityProvider.setCurrentUser(user);
+    }
+
+    @Test
+    void getUser() {
+        UserResDto user = userService.getUser();
+        assertThat(user).isNotNull();
+    }
+
+    @Test
+    void updateUser() {
+        // given
+        UpdateUserReqDto req = new UpdateUserReqDto("updated_nickname");
+
+        // when
+        userService.updateUser(req);
+
+        // then
+        assertThat(securityProvider.getCurrentUser().getNickname()).isEqualTo("updated_nickname");
+    }
+
+    @Test
+    void updateLocation() {
+        // given
+        String latitude = "12.123145"; String longitude = "123.123123";
+
+        // when
+        userService.updateLocation(latitude, longitude);
+
+        // then
+        assertThat(securityProvider.getCurrentUser().getLocation()).isEqualTo(locationService.getLocation(latitude, longitude));
+    }
+
+    @Test
+    void deleteUser() {
+        // when
+        User currentUser = securityProvider.getCurrentUser();
+        userService.deleteUser();
+
+        // then
+        assertThat(userRepository.findById(currentUser.getUserId())).isEmpty();
+    }
+
+    @Test
+    void validateNickname() {
+        assertThatThrownBy(() -> userService.validateNickname("임원재"))
+                .isInstanceOf(BusinessException.class);
+
+        assertThatNoException().isThrownBy(() -> userService.validateNickname("임원재1"));
+    }
+}
\ No newline at end of file
diff --git a/src/test/java/ita/tinybite/domain/user/service/fake/FakeLocationService.java b/src/test/java/ita/tinybite/domain/user/service/fake/FakeLocationService.java
new file mode 100644
index 0000000..d959117
--- /dev/null
+++ b/src/test/java/ita/tinybite/domain/user/service/fake/FakeLocationService.java
@@ -0,0 +1,11 @@
+package ita.tinybite.domain.user.service.fake;
+
+import ita.tinybite.global.location.LocationService;
+
+public class FakeLocationService extends LocationService {
+
+    @Override
+    public String getLocation(String latitude, String longitude) {
+        return latitude + " " + longitude;
+    }
+}
diff --git a/src/test/java/ita/tinybite/domain/user/service/fake/FakeSecurityProvider.java b/src/test/java/ita/tinybite/domain/user/service/fake/FakeSecurityProvider.java
new file mode 100644
index 0000000..e368543
--- /dev/null
+++ b/src/test/java/ita/tinybite/domain/user/service/fake/FakeSecurityProvider.java
@@ -0,0 +1,23 @@
+package ita.tinybite.domain.user.service.fake;
+
+import ita.tinybite.domain.auth.service.SecurityProvider;
+import ita.tinybite.domain.user.entity.User;
+import ita.tinybite.domain.user.repository.UserRepository;
+
+public class FakeSecurityProvider extends SecurityProvider {
+
+    private User currentUser;
+
+    public FakeSecurityProvider(UserRepository userRepository) {
+        super(userRepository);
+    }
+
+    public void setCurrentUser(User user) {
+        currentUser = user;
+    }
+
+    @Override
+    public User getCurrentUser() {
+        return currentUser;
+    }
+}
diff --git a/src/test/java/ita/tinybite/global/sms/SmsAuthServiceTest.java b/src/test/java/ita/tinybite/global/sms/SmsAuthServiceTest.java
index 407877a..eb0a4bc 100644
--- a/src/test/java/ita/tinybite/global/sms/SmsAuthServiceTest.java
+++ b/src/test/java/ita/tinybite/global/sms/SmsAuthServiceTest.java
@@ -1,10 +1,12 @@
 package ita.tinybite.global.sms;
 
 import ita.tinybite.global.exception.BusinessException;
+import ita.tinybite.global.sms.dto.req.CheckReqDto;
 import ita.tinybite.global.sms.fake.FakeRedisTemplate;
 import ita.tinybite.global.sms.fake.FakeSmsService;
 import ita.tinybite.global.sms.service.SmsAuthService;
 import org.junit.jupiter.api.Test;
+import org.springframework.test.context.ActiveProfiles;
 
 
 import static org.assertj.core.api.Assertions.*;
@@ -35,4 +37,10 @@ void should_fail_when_smsAuth_send_with_invalid_phone() {
                     .isInstanceOf(BusinessException.class);
         }
     }
+
+    @Test
+    void should_fail_when_smsAuth_send_with_expired_auth_code() {
+        assertThatThrownBy(() -> smsAuthService.check(new CheckReqDto(SUCCESS_PHONE_NUMBER, "123456")))
+                .isInstanceOf(BusinessException.class);
+    }
 }
diff --git a/src/test/resources/application-test.yaml b/src/test/resources/application-test.yaml
index 9ade865..58872b9 100644
--- a/src/test/resources/application-test.yaml
+++ b/src/test/resources/application-test.yaml
@@ -3,9 +3,12 @@ spring:
     activate:
       on-profile: "test"
 
-# h2 사용하기?
-#  datasource:
-#    driver-class-name: com.mysql.cj.jdbc.Driver
-#    url: ${TEST_DB_URL}
-#    username: ${TEST_DB_USERNAME}
-#    password: ${TEST_DB_PASSWORD}
\ No newline at end of file
+  profiles:
+    active: "test"
+
+# h2 사용
+  datasource:
+    url: jdbc:h2:mem:testdb;MODE=MySQL;DB_CLOSE_DELAY=-1
+    driver-class-name: org.h2.Driver
+    username: sa
+    password:
\ No newline at end of file