diff --git a/packages/backend/src/db/postgre.ts b/packages/backend/src/db/postgre.ts
index 68ee57595..f8e483939 100644
--- a/packages/backend/src/db/postgre.ts
+++ b/packages/backend/src/db/postgre.ts
@@ -195,7 +195,7 @@ export const db = new DataSource({
 		options: {
 			host: config.redis.host,
 			port: config.redis.port,
-			family: config.redis.family == null ? 0 : config.redis.family,
+			family: config.redis.family ?? 0,
 			password: config.redis.pass,
 			keyPrefix: `${config.redis.prefix}:query:`,
 			db: config.redis.db || 0,
diff --git a/packages/backend/src/db/redis.ts b/packages/backend/src/db/redis.ts
index 49f5bb2ba..1843d2317 100644
--- a/packages/backend/src/db/redis.ts
+++ b/packages/backend/src/db/redis.ts
@@ -5,7 +5,7 @@ export function createConnection() {
 	return new Redis({
 		port: config.redis.port,
 		host: config.redis.host,
-		family: config.redis.family == null ? 0 : config.redis.family,
+		family: config.redis.family ?? 0,
 		password: config.redis.pass,
 		keyPrefix: `${config.redis.prefix}:`,
 		db: config.redis.db || 0,
diff --git a/packages/backend/src/queue/initialize.ts b/packages/backend/src/queue/initialize.ts
index eef4080af..4f251388b 100644
--- a/packages/backend/src/queue/initialize.ts
+++ b/packages/backend/src/queue/initialize.ts
@@ -6,7 +6,7 @@ export function initialize<T>(name: string, limitPerSec = -1) {
 		redis: {
 			port: config.redis.port,
 			host: config.redis.host,
-			family: config.redis.family == null ? 0 : config.redis.family,
+			family: config.redis.family ?? 0,
 			password: config.redis.pass,
 			db: config.redis.db || 0,
 		},
diff --git a/packages/backend/src/services/note/create.ts b/packages/backend/src/services/note/create.ts
index ca0061441..865956746 100644
--- a/packages/backend/src/services/note/create.ts
+++ b/packages/backend/src/services/note/create.ts
@@ -515,7 +515,7 @@ async function insertNote(user: { id: User['id']; host: User['host']; }, data: O
 		name: data.name,
 		text: data.text,
 		hasPoll: data.poll != null,
-		cw: data.cw == null ? null : data.cw,
+		cw: data.cw ?? null,
 		tags: tags.map(tag => normalizeForSearch(tag)),
 		emojis,
 		userId: user.id,
@@ -529,11 +529,11 @@ async function insertNote(user: { id: User['id']; host: User['host']; }, data: O
 
 		attachedFileTypes: data.files ? data.files.map(file => file.type) : [],
 
-		// 以下非正規化データ
-		replyUserId: data.reply ? data.reply.userId : null,
-		replyUserHost: data.reply ? data.reply.userHost : null,
-		renoteUserId: data.renote ? data.renote.userId : null,
-		renoteUserHost: data.renote ? data.renote.userHost : null,
+		// denormalized data below
+		replyUserId: data.reply?.userId,
+		replyUserHost: data.reply?.userHost,
+		renoteUserId: data.renote?.userId,
+		renoteUserHost: data.renote?.userHost,
 		userHost: user.host,
 	});
 
@@ -546,10 +546,9 @@ async function insertNote(user: { id: User['id']; host: User['host']; }, data: O
 		const profiles = await UserProfiles.findBy({ userId: In(insert.mentions) });
 		insert.mentionedRemoteUsers = JSON.stringify(mentionedUsers.filter(u => Users.isRemoteUser(u)).map(u => {
 			const profile = profiles.find(p => p.userId === u.id);
-			const url = profile != null ? profile.url : null;
 			return {
 				uri: u.uri,
-				url: url == null ? undefined : url,
+				url: profile?.url,
 				username: u.username,
 				host: u.host,
 			} as IMentionedRemoteUsers[0];