diff --git a/src/components/user/auth-form/ProfileImageContainer.tsx b/src/components/user/auth-form/ProfileImageContainer.tsx
index b65e6e5d..b599ff73 100644
--- a/src/components/user/auth-form/ProfileImageContainer.tsx
+++ b/src/components/user/auth-form/ProfileImageContainer.tsx
@@ -4,7 +4,7 @@ import { useFormContext } from 'react-hook-form';
 import { convertBytesToString } from '@utils/converter';
 import { USER_SETTINGS } from '@constants/settings';
 import useToast from '@hooks/useToast';
-import { useEffect, useRef } from 'react';
+import { useEffect } from 'react';
 
 type ProfileImageContainerProps = {
   imageUrl: string;
@@ -14,14 +14,12 @@ type ProfileImageContainerProps = {
 export default function ProfileImageContainer({ imageUrl, setImageUrl }: ProfileImageContainerProps) {
   const { setValue } = useFormContext();
   const { toastWarn } = useToast();
-  const imageRef = useRef<string | null>(null);
 
-  // 컴포넌트 언마운트 시 이미지 URL 해제
   useEffect(() => {
     return () => {
-      if (imageRef.current) URL.revokeObjectURL(imageRef.current);
+      if (imageUrl) URL.revokeObjectURL(imageUrl);
     };
-  }, []);
+  }, [imageUrl]);
 
   const handleChangeImg = (e: React.ChangeEvent<HTMLInputElement>) => {
     const file = e.target.files?.[0];
@@ -37,13 +35,11 @@ export default function ProfileImageContainer({ imageUrl, setImageUrl }: Profile
     const image = URL.createObjectURL(file);
     setImageUrl(image);
     setValue('profileUrl', image);
-    imageRef.current = image;
   };
 
   const handleRemoveImg = () => {
-    if (imageRef.current) {
-      URL.revokeObjectURL(imageRef.current);
-      imageRef.current = null;
+    if (imageUrl) {
+      URL.revokeObjectURL(imageUrl);
     }
 
     setImageUrl('');
diff --git a/src/constants/settings.ts b/src/constants/settings.ts
index e74320f1..75573579 100644
--- a/src/constants/settings.ts
+++ b/src/constants/settings.ts
@@ -1,9 +1,9 @@
-import { MB } from '@constants/units';
+import { DAY, MB, MINUTE, SECOND } from '@constants/units';
 
 export const AUTH_SETTINGS = Object.freeze({
-  // ACCESS_TOKEN_EXPIRATION: 3000, // 테스트용 3초
-  ACCESS_TOKEN_EXPIRATION: 15 * 60 * 1000, // 15분
-  REFRESH_TOKEN_EXPIRATION: 7 * 24 * 60 * 60 * 1000, // 7일
+  // ACCESS_TOKEN_EXPIRATION: 5 * SECOND, // 테스트용 5초
+  ACCESS_TOKEN_EXPIRATION: 15 * MINUTE, // 15분
+  REFRESH_TOKEN_EXPIRATION: 7 * DAY, // 7일
 });
 
 export const USER_SETTINGS = Object.freeze({
diff --git a/src/mocks/handlers.ts b/src/mocks/handlers.ts
index a9884e73..1aae7d61 100644
--- a/src/mocks/handlers.ts
+++ b/src/mocks/handlers.ts
@@ -2,7 +2,7 @@ import userServiceHandler from '@mocks/services/userServiceHandler';
 import teamServiceHandler from '@mocks/services/teamServiceHandler';
 import projectServiceHandler from '@mocks/services/projectServiceHandler';
 import taskServiceHandler from '@mocks/services/taskServiceHandler';
-import authServiceHandler from './services/authServiceHandler';
+import authServiceHandler from '@mocks/services/authServiceHandler';
 
 const handlers = [
   ...userServiceHandler,
diff --git a/src/services/axiosProvider.ts b/src/services/axiosProvider.ts
index 87f5e0f6..bcd7ea19 100644
--- a/src/services/axiosProvider.ts
+++ b/src/services/axiosProvider.ts
@@ -2,9 +2,9 @@ import axios from 'axios';
 import { SECOND } from '@constants/units';
 import { JWT_TOKEN_DUMMY } from '@mocks/mockData';
 import type { AxiosInstance, AxiosRequestConfig } from 'axios';
+import useToast from '@hooks/useToast';
+import { getAccessToken } from '@services/authService';
 import { useAuthStore } from '@/stores/useAuthStore';
-import useToast from '@/hooks/useToast';
-import { getAccessToken } from './authService';
 
 const BASE_URL = import.meta.env.VITE_BASE_URL;
 const defaultConfigOptions: AxiosRequestConfig = {