diff --git a/packages/backend/src/config.ts b/packages/backend/src/config.ts
index 2542cce778..46342fd633 100644
--- a/packages/backend/src/config.ts
+++ b/packages/backend/src/config.ts
@@ -487,7 +487,7 @@ function applyEnvOverrides(config: Source) {
 		}
 	}
 
-	function _step2name(step: string|number): string {
+	function _step2name(step: string | number): string {
 		return step.toString().replaceAll(/[^a-z0-9]+/gi, '').toUpperCase();
 	}
 
diff --git a/packages/backend/src/core/DownloadService.ts b/packages/backend/src/core/DownloadService.ts
index a1a6914130..26e60e00b3 100644
--- a/packages/backend/src/core/DownloadService.ts
+++ b/packages/backend/src/core/DownloadService.ts
@@ -34,7 +34,7 @@ export class DownloadService {
 	}
 
 	@bindThis
-	public async downloadUrl(url: string, path: string, options: { timeout?: number, operationTimeout?: number, maxSize?: number} = {} ): Promise<{
+	public async downloadUrl(url: string, path: string, options: { timeout?: number, operationTimeout?: number, maxSize?: number } = {} ): Promise<{
 		filename: string;
 	}> {
 		this.logger.info(`Downloading ${chalk.cyan(url)} to ${chalk.cyanBright(path)} ...`);
diff --git a/packages/backend/src/core/activitypub/type.ts b/packages/backend/src/core/activitypub/type.ts
index e7459a57d2..281733d484 100644
--- a/packages/backend/src/core/activitypub/type.ts
+++ b/packages/backend/src/core/activitypub/type.ts
@@ -112,7 +112,7 @@ export interface IActivity extends IObject {
 	actor: IObject | string;
 	// ActivityPub spec allows for arrays: https://www.w3.org/TR/activitystreams-vocabulary/#properties
 	// Misskey can only handle one value, so we use a tuple for that case.
-	object: IObject | string | [IObject | string] ;
+	object: IObject | string | [IObject | string];
 	target?: IObject | string;
 	/** LD-Signature */
 	signature?: {
diff --git a/packages/backend/src/misc/is-renote.ts b/packages/backend/src/misc/is-renote.ts
index d6872de46a..fcaafaf95a 100644
--- a/packages/backend/src/misc/is-renote.ts
+++ b/packages/backend/src/misc/is-renote.ts
@@ -77,7 +77,7 @@ type PackedPureRenote = PackedRenote & {
 	replyId: NonNullable<Packed<'Note'>['replyId']>;
 	poll: NonNullable<Packed<'Note'>['poll']>;
 	fileIds: NonNullable<Packed<'Note'>['fileIds']>;
-}
+};
 
 export function isRenotePacked(note: Packed<'Note'>): note is PackedRenote {
 	return note.renoteId != null;
diff --git a/packages/backend/src/queue/processors/ImportNotesProcessorService.ts b/packages/backend/src/queue/processors/ImportNotesProcessorService.ts
index ee9819b29f..5e660e8081 100644
--- a/packages/backend/src/queue/processors/ImportNotesProcessorService.ts
+++ b/packages/backend/src/queue/processors/ImportNotesProcessorService.ts
@@ -83,7 +83,7 @@ export class ImportNotesProcessorService {
 	}
 
 	@bindThis
-	private downloadUrl(url: string, path:string): Promise<{filename: string}> {
+	private downloadUrl(url: string, path:string): Promise<{ filename: string }> {
 		return this.downloadService.downloadUrl(url, path, { operationTimeout: this.config.import?.downloadTimeout, maxSize: this.config.import?.maxFileSize });
 	}
 
diff --git a/packages/backend/src/queue/types.ts b/packages/backend/src/queue/types.ts
index 7d4d609f46..1bd9f7a0ab 100644
--- a/packages/backend/src/queue/types.ts
+++ b/packages/backend/src/queue/types.ts
@@ -161,4 +161,4 @@ export type ThinUser = {
 
 export type ScheduleNotePostJobData = {
 	scheduleNoteId: MiNote['id'];
-}
+};
diff --git a/packages/backend/src/server/api/endpoints/notes/schedule/list.ts b/packages/backend/src/server/api/endpoints/notes/schedule/list.ts
index 4dd3d7a81a..3665348b97 100644
--- a/packages/backend/src/server/api/endpoints/notes/schedule/list.ts
+++ b/packages/backend/src/server/api/endpoints/notes/schedule/list.ts
@@ -100,7 +100,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				id: string;
 				note: {
 					text?: string;
-					cw?: string|null;
+					cw?: string | null;
 					fileIds: string[];
 					visibility: typeof noteVisibilities[number];
 					visibleUsers: Packed<'UserLite'>[];
diff --git a/packages/backend/src/server/api/mastodon/MastodonApiServerService.ts b/packages/backend/src/server/api/mastodon/MastodonApiServerService.ts
index b289ad7135..59ab3b71aa 100644
--- a/packages/backend/src/server/api/mastodon/MastodonApiServerService.ts
+++ b/packages/backend/src/server/api/mastodon/MastodonApiServerService.ts
@@ -192,7 +192,7 @@ export class MastodonApiServerService {
 			reply.send(response);
 		});
 
-		fastify.post<{ Body: { description?: string; focus?: string }}>('/v2/media', { preHandler: upload.single('file') }, async (_request, reply) => {
+		fastify.post<{ Body: { description?: string; focus?: string } }>('/v2/media', { preHandler: upload.single('file') }, async (_request, reply) => {
 			const multipartData = await _request.file();
 			if (!multipartData) {
 				reply.code(401).send({ error: 'No image' });
@@ -284,7 +284,7 @@ export class MastodonApiServerService {
 			reply.send(response);
 		});
 
-		fastify.get<{ Querystring: { limit?: string }}>('/v1/follow_requests', async (_request, reply) => {
+		fastify.get<{ Querystring: { limit?: string } }>('/v1/follow_requests', async (_request, reply) => {
 			const client = this.clientService.getClient(_request);
 
 			const limit = _request.query.limit ? parseInt(_request.query.limit) : 20;
diff --git a/packages/backend/src/server/api/mastodon/endpoints/account.ts b/packages/backend/src/server/api/mastodon/endpoints/account.ts
index efb26ca53e..8bc3c14c15 100644
--- a/packages/backend/src/server/api/mastodon/endpoints/account.ts
+++ b/packages/backend/src/server/api/mastodon/endpoints/account.ts
@@ -142,7 +142,7 @@ export class ApiAccountMastodon {
 			reply.send(response);
 		});
 
-		fastify.get<{ Querystring: { acct?: string }}>('/v1/accounts/lookup', async (_request, reply) => {
+		fastify.get<{ Querystring: { acct?: string } }>('/v1/accounts/lookup', async (_request, reply) => {
 			if (!_request.query.acct) return reply.code(400).send({ error: 'BAD_REQUEST', error_description: 'Missing required property "acct"' });
 
 			const client = this.clientService.getClient(_request);
@@ -154,7 +154,7 @@ export class ApiAccountMastodon {
 			reply.send(response);
 		});
 
-		fastify.get<ApiAccountMastodonRoute & { Querystring: { id?: string | string[] }}>('/v1/accounts/relationships', async (_request, reply) => {
+		fastify.get<ApiAccountMastodonRoute & { Querystring: { id?: string | string[] } }>('/v1/accounts/relationships', async (_request, reply) => {
 			if (!_request.query.id) return reply.code(400).send({ error: 'BAD_REQUEST', error_description: 'Missing required property "id"' });
 
 			const client = this.clientService.getClient(_request);
diff --git a/packages/backend/test/e2e/streaming.ts b/packages/backend/test/e2e/streaming.ts
index 72f26a38e0..af905b4c91 100644
--- a/packages/backend/test/e2e/streaming.ts
+++ b/packages/backend/test/e2e/streaming.ts
@@ -148,7 +148,7 @@ describe('Streaming', () => {
 
 			test('フォローしているユーザーの投稿が流れる', async () => {
 				const fired = await waitFire(
-					ayano, 'homeTimeline',		// ayano:home
+					ayano, 'homeTimeline', // ayano:home
 					() => api('notes/create', { text: 'foo' }, kyoko),	// kyoko posts
 					msg => msg.type === 'note' && msg.body.userId === kyoko.id,	// wait kyoko
 				);
@@ -158,7 +158,7 @@ describe('Streaming', () => {
 
 			test('フォローしているユーザーの visibility: followers な投稿が流れる', async () => {
 				const fired = await waitFire(
-					ayano, 'homeTimeline',		// ayano:home
+					ayano, 'homeTimeline', // ayano:home
 					() => api('notes/create', { text: 'foo', visibility: 'followers' }, kyoko),	// kyoko posts
 					msg => msg.type === 'note' && msg.body.userId === kyoko.id,	// wait kyoko
 				);
@@ -170,7 +170,7 @@ describe('Streaming', () => {
 				const note = await post(kyoko, { text: 'foo', visibility: 'followers' });
 
 				const fired = await waitFire(
-					ayano, 'homeTimeline',		// ayano:home
+					ayano, 'homeTimeline', // ayano:home
 					() => api('notes/create', { text: 'bar', visibility: 'followers', replyId: note.id }, kyoko),	// kyoko posts
 					msg => msg.type === 'note' && msg.body.userId === kyoko.id && msg.body.reply.text === 'foo',
 				);
@@ -182,7 +182,7 @@ describe('Streaming', () => {
 				const chitoseNote = await post(chitose, { text: 'followers-only post', visibility: 'followers' });
 
 				const fired = await waitFire(
-					ayano, 'homeTimeline',	// ayano:home
+					ayano, 'homeTimeline', // ayano:home
 					() => api('notes/create', { text: 'reply to chitose\'s followers-only post', replyId: chitoseNote.id }, kyoko),	// kyoko's reply to chitose's followers-only post
 					msg => msg.type === 'note' && msg.body.userId === kyoko.id,	// wait kyoko
 				);
@@ -195,7 +195,7 @@ describe('Streaming', () => {
 				const kyokoReply = await post(kyoko, { text: 'reply to followers-only post', replyId: chitoseNote.id });
 
 				const fired = await waitFire(
-					ayano, 'homeTimeline',	// ayano:home
+					ayano, 'homeTimeline', // ayano:home
 					() => api('notes/create', { renoteId: kyokoReply.id }, kyoko),	// kyoko's renote of kyoko's reply to chitose's followers-only post
 					msg => msg.type === 'note' && msg.body.userId === kyoko.id,	// wait kyoko
 				);
@@ -205,7 +205,7 @@ describe('Streaming', () => {
 
 			test('フォローしていないユーザーの投稿は流れない', async () => {
 				const fired = await waitFire(
-					kyoko, 'homeTimeline',	// kyoko:home
+					kyoko, 'homeTimeline', // kyoko:home
 					() => api('notes/create', { text: 'foo' }, ayano),	// ayano posts
 					msg => msg.type === 'note' && msg.body.userId === ayano.id,	// wait ayano
 				);
@@ -215,7 +215,7 @@ describe('Streaming', () => {
 
 			test('フォローしているユーザーのダイレクト投稿が流れる', async () => {
 				const fired = await waitFire(
-					ayano, 'homeTimeline',	// ayano:home
+					ayano, 'homeTimeline', // ayano:home
 					() => api('notes/create', { text: 'foo', visibility: 'specified', visibleUserIds: [ayano.id] }, kyoko),	// kyoko dm => ayano
 					msg => msg.type === 'note' && msg.body.userId === kyoko.id,	// wait kyoko
 				);
@@ -225,7 +225,7 @@ describe('Streaming', () => {
 
 			test('フォローしているユーザーでも自分が指定されていないダイレクト投稿は流れない', async () => {
 				const fired = await waitFire(
-					ayano, 'homeTimeline',	// ayano:home
+					ayano, 'homeTimeline', // ayano:home
 					() => api('notes/create', { text: 'foo', visibility: 'specified', visibleUserIds: [chitose.id] }, kyoko),	// kyoko dm => chitose
 					msg => msg.type === 'note' && msg.body.userId === kyoko.id,	// wait kyoko
 				);
@@ -574,7 +574,7 @@ describe('Streaming', () => {
 
 			test('withReplies = falseでフォローしてる人によるリプライが流れてくる', async () => {
 				const fired = await waitFire(
-					ayano, 'globalTimeline',		// ayano:Global
+					ayano, 'globalTimeline', // ayano:Global
 					() => api('notes/create', { text: 'foo', replyId: kanakoNote.id }, kyoko),	// kyoko posts
 					msg => msg.type === 'note' && msg.body.userId === kyoko.id,	// wait kyoko
 				);
diff --git a/packages/backend/test/e2e/users.ts b/packages/backend/test/e2e/users.ts
index ed1dadd181..4b3ec856f1 100644
--- a/packages/backend/test/e2e/users.ts
+++ b/packages/backend/test/e2e/users.ts
@@ -312,7 +312,9 @@ describe('ユーザー', () => {
 		assert.strictEqual(response.name, null);
 		assert.strictEqual(response.username, 'zoe');
 		assert.strictEqual(response.host, null);
-		response.avatarUrl && assert.match(response.avatarUrl, /^[-a-zA-Z0-9@:%._\+~#&?=\/]+$/);
+		if (response.avatarUrl) {
+			assert.match(response.avatarUrl, /^[-a-zA-Z0-9@:%._\+~#&?=\/]+$/);
+		}
 		assert.strictEqual(response.avatarBlurhash, null);
 		assert.deepStrictEqual(response.avatarDecorations, []);
 		assert.strictEqual(response.isBot, false);
diff --git a/packages/backend/test/unit/SigninWithPasskeyApiService.ts b/packages/backend/test/unit/SigninWithPasskeyApiService.ts
index efed905e02..2b7afb02f9 100644
--- a/packages/backend/test/unit/SigninWithPasskeyApiService.ts
+++ b/packages/backend/test/unit/SigninWithPasskeyApiService.ts
@@ -54,7 +54,7 @@ class DummyFastifyReply {
 }
 class DummyFastifyRequest {
 	public ip: string;
-	public body: {credential: any, context: string};
+	public body: { credential: any, context: string };
 	public headers: IncomingHttpHeaders = { 'accept': 'application/json' };
 	constructor(body?: any) {
 		this.ip = '0.0.0.0';
diff --git a/packages/backend/test/utils.ts b/packages/backend/test/utils.ts
index 8306208477..7b69cb04f4 100644
--- a/packages/backend/test/utils.ts
+++ b/packages/backend/test/utils.ts
@@ -661,7 +661,9 @@ export async function captureWebhook<T = SystemWebhookPayload>(postAction: () =>
 	let timeoutHandle: NodeJS.Timeout | null = null;
 	const result = await new Promise<string>(async (resolve, reject) => {
 		fastify.all('/', async (req, res) => {
-			timeoutHandle && clearTimeout(timeoutHandle);
+			if (timeoutHandle) {
+				clearTimeout(timeoutHandle);
+			}
 
 			const body = JSON.stringify(req.body);
 			res.status(200).send('ok');