diff --git a/backend/src/main/resources/dev/schema.sql b/backend/src/main/resources/dev/schema.sql
index 49f6bb92e..818174a0c 100644
--- a/backend/src/main/resources/dev/schema.sql
+++ b/backend/src/main/resources/dev/schema.sql
@@ -24,7 +24,7 @@ create table if not exists killing_part
     start_second integer      not null,
     length       varchar(255) not null check (length in ('SHORT', 'STANDARD', 'LONG')),
     song_id      bigint       not null,
-    like_count   integer      not null,
+    like_count   integer      not null default 0,
     created_at   timestamp(6) not null,
     primary key (id)
 );
diff --git a/backend/src/main/resources/schema.sql b/backend/src/main/resources/schema.sql
index ec87dd5e0..965adf7a4 100644
--- a/backend/src/main/resources/schema.sql
+++ b/backend/src/main/resources/schema.sql
@@ -80,3 +80,4 @@ alter table killing_part add column like_count integer not null;
 alter table killing_part_comment add column member_id bigint not null;
 alter table song change video_url video_id varchar(20) not null;
 alter table voting_song change video_url video_id varchar(20) not null;
+alter table killing_part alter column like_count set default 0;
diff --git a/backend/src/test/java/shook/shook/auth/ui/AccessTokenReissueControllerTest.java b/backend/src/test/java/shook/shook/auth/ui/AccessTokenReissueControllerTest.java
index a33b14efc..0d3f3aaa1 100644
--- a/backend/src/test/java/shook/shook/auth/ui/AccessTokenReissueControllerTest.java
+++ b/backend/src/test/java/shook/shook/auth/ui/AccessTokenReissueControllerTest.java
@@ -2,6 +2,7 @@
 
 import static org.assertj.core.api.Assertions.assertThat;
 
+import io.jsonwebtoken.Claims;
 import io.restassured.RestAssured;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
@@ -63,11 +64,9 @@ void success_reissue_accessToken() {
             .extract().body().as(ReissueAccessTokenResponse.class);
 
         //then
-        final String accessToken = tokenProvider.createAccessToken(
-            savedMember.getId(),
-            savedMember.getNickname());
-
-        assertThat(response.getAccessToken()).isEqualTo(accessToken);
+        final Claims claims = tokenProvider.parseClaims(response.getAccessToken());
+        assertThat(claims.get("memberId", Long.class)).isEqualTo(savedMember.getId());
+        assertThat(claims.get("nickname", String.class)).isEqualTo(savedMember.getNickname());
     }
 
     @DisplayName("refreshToken이 없이 accessToken을 재발급 받으려면 예외를 던잔디.")
diff --git a/backend/src/test/resources/killingpart/initialize_killing_part_song.sql b/backend/src/test/resources/killingpart/initialize_killing_part_song.sql
index ae594f07a..14ec320b7 100644
--- a/backend/src/test/resources/killingpart/initialize_killing_part_song.sql
+++ b/backend/src/test/resources/killingpart/initialize_killing_part_song.sql
@@ -22,7 +22,7 @@ create table if not exists killing_part
     start_second integer      not null,
     length       varchar(255) not null check (length in ('SHORT', 'STANDARD', 'LONG')),
     song_id      bigint       not null,
-    like_count   integer      not null,
+    like_count   integer      not null default 0,
     created_at   timestamp(6) not null,
     primary key (id)
 );
diff --git a/backend/src/test/resources/schema-test.sql b/backend/src/test/resources/schema-test.sql
index 057b5c2ea..8be1c4d0c 100644
--- a/backend/src/test/resources/schema-test.sql
+++ b/backend/src/test/resources/schema-test.sql
@@ -25,7 +25,7 @@ create table if not exists killing_part
     start_second integer      not null,
     length       varchar(255) not null check (length in ('SHORT', 'STANDARD', 'LONG')),
     song_id      bigint       not null,
-    like_count   integer      not null,
+    like_count   integer      not null default 0,
     created_at   timestamp(6) not null,
     primary key (id)
 );