diff --git a/src/main/java/com/issueDive/config/SecurityConfig.java b/src/main/java/com/issueDive/config/SecurityConfig.java
index e4bc3bd..7b6bb64 100644
--- a/src/main/java/com/issueDive/config/SecurityConfig.java
+++ b/src/main/java/com/issueDive/config/SecurityConfig.java
@@ -32,7 +32,7 @@
 @RequiredArgsConstructor
 public class SecurityConfig {
 
-//    private final CustomUserDetailsService userDetailsService; // DB 기반 인증
+    private final CustomUserDetailsService userDetailsService; // DB 기반 인증
     private final JwtAuthenticationFilter jwtAuthenticationFilter; // JWT 필터
 
 
@@ -89,6 +89,7 @@ public PasswordEncoder passwordEncoder() {
         return new BCryptPasswordEncoder();
     }
 
+    /*
     @Bean
     public UserDetailsService userDetailsService(PasswordEncoder passwordEncoder) {
         UserDetails user = User.withUsername("test")
@@ -98,6 +99,8 @@ public UserDetailsService userDetailsService(PasswordEncoder passwordEncoder) {
         return new InMemoryUserDetailsManager(user);
     }
 
+     */
+
     @Bean
     public AuthenticationManager authenticationManager(AuthenticationConfiguration config) throws Exception {
         return config.getAuthenticationManager();
diff --git a/src/test/java/com/issueDive/config/SecurityConfigTest.java b/src/test/java/com/issueDive/config/SecurityConfigTest.java
index 4882cf2..42de2b9 100644
--- a/src/test/java/com/issueDive/config/SecurityConfigTest.java
+++ b/src/test/java/com/issueDive/config/SecurityConfigTest.java
@@ -23,11 +23,9 @@
 import java.time.LocalDateTime;
 import java.util.ArrayList;
 import java.util.List;
-
-import static org.mockito.AdditionalMatchers.not;
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.BDDMockito.given;
-import static org.mockito.Mockito.doNothing;
+
 import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.*;
 import static org.springframework.test.web.servlet.result.MockMvcResultHandlers.print;
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;
@@ -79,7 +77,7 @@ void publicUrl_Signup_AllowedWithoutAuth() throws Exception {
                         .contentType(MediaType.APPLICATION_JSON)
                         .content("{}"))
                 .andDo(print())
-                .andExpect(status().isBadRequest());
+                .andExpect(status().isBadRequest());// 400 Bad Request (유효성 검증 실패)
     }
 
     @Test