diff --git a/src/components/LoginModal.tsx b/src/components/LoginModal.tsx
index 87fcc7e..dc4d89d 100644
--- a/src/components/LoginModal.tsx
+++ b/src/components/LoginModal.tsx
@@ -66,6 +66,7 @@ export default function LoginModal({ open, onClose }: ModalProps) {
                   id="email"
                   type="email"
                   autoComplete="email"
+                  defaultValue={'test@test.com'}
                   required
                   className="px-3 block w-full rounded-md border-0 py-1.5 text-gray-900 shadow-sm ring-1 ring-inset ring-gray-300 placeholder:text-gray-400 focus:ring-2 focus:ring-inset focus:ring-indigo-600 sm:text-sm sm:leading-6"
                   {...register('email', {
@@ -87,6 +88,7 @@ export default function LoginModal({ open, onClose }: ModalProps) {
                   id="password"
                   type="password"
                   autoComplete="current-password"
+                  defaultValue={'1234'}
                   required
                   className="px-3 block w-full rounded-md border-0 py-1.5 text-gray-900 shadow-sm ring-1 ring-inset ring-gray-300 placeholder:text-gray-400 focus:ring-2 focus:ring-inset focus:ring-indigo-600 sm:text-sm sm:leading-6"
                   {...register('password', {
diff --git a/src/pages/CreateGroupPage/index.tsx b/src/pages/CreateGroupPage/index.tsx
index 4d69be5..64b0510 100644
--- a/src/pages/CreateGroupPage/index.tsx
+++ b/src/pages/CreateGroupPage/index.tsx
@@ -135,10 +135,10 @@ export default function CreateGroupPage() {
                 type="text"
                 {...register('name', {
                   required: '스터디 이름을 작성해주세요!',
-                  maxLength: { value: 10, message: '스터디 이름은 최대 10글자입니다!' },
+                  maxLength: { value: 20, message: '스터디 이름은 최대 20글자입니다!' },
                 })}
                 className="w-full border rounded-md py-1 pl-3"
-                placeholder="스터디 이름을 입력하세요. (최대 10글자)"
+                placeholder="스터디 이름을 입력하세요. (최대 20글자)"
               />
             </div>
             <ErrorMessage