diff --git a/packages/backend/src/core/CollapsedQueueService.ts b/packages/backend/src/core/CollapsedQueueService.ts
index f142e98e35..5bb041eb76 100644
--- a/packages/backend/src/core/CollapsedQueueService.ts
+++ b/packages/backend/src/core/CollapsedQueueService.ts
@@ -16,6 +16,7 @@ import type { UsersRepository, NotesRepository, AccessTokensRepository, MiAntenn
 import { DI } from '@/di-symbols.js';
 import { AntennaService } from '@/core/AntennaService.js';
 import { CacheService } from '@/core/CacheService.js';
+import type { TimeService } from '@/core/TimeService.js';
 
 export type UpdateInstanceJob = {
 	latestRequestReceivedAt?: Date,
@@ -84,6 +85,7 @@ export class CollapsedQueueService implements OnApplicationShutdown {
 		private readonly internalEventService: InternalEventService,
 		private readonly antennaService: AntennaService,
 		private readonly cacheService: CacheService,
+		private readonly timeService: TimeService,
 
 		loggerService: LoggerService,
 	) {
@@ -94,6 +96,7 @@ export class CollapsedQueueService implements OnApplicationShutdown {
 
 		this.updateInstanceQueue = new CollapsedQueue(
 			this.internalEventService,
+			this.timeService,
 			'updateInstance',
 			fiveMinuteInterval,
 			(oldJob, newJob) => ({
@@ -170,6 +173,7 @@ export class CollapsedQueueService implements OnApplicationShutdown {
 
 		this.updateUserQueue = new CollapsedQueue(
 			this.internalEventService,
+			this.timeService,
 			'updateUser',
 			oneMinuteInterval,
 			(oldJob, newJob) => ({
@@ -221,6 +225,7 @@ export class CollapsedQueueService implements OnApplicationShutdown {
 
 		this.updateNoteQueue = new CollapsedQueue(
 			this.internalEventService,
+			this.timeService,
 			'updateNote',
 			oneMinuteInterval,
 			(oldJob, newJob) => ({
@@ -246,6 +251,7 @@ export class CollapsedQueueService implements OnApplicationShutdown {
 
 		this.updateAccessTokenQueue = new CollapsedQueue(
 			this.internalEventService,
+			this.timeService,
 			'updateAccessToken',
 			fiveMinuteInterval,
 			(oldJob, newJob) => ({
@@ -266,6 +272,7 @@ export class CollapsedQueueService implements OnApplicationShutdown {
 
 		this.updateAntennaQueue = new CollapsedQueue(
 			this.internalEventService,
+			this.timeService,
 			'updateAntenna',
 			fiveMinuteInterval,
 			(oldJob, newJob) => ({
diff --git a/packages/backend/src/core/DriveService.ts b/packages/backend/src/core/DriveService.ts
index 28e79d1c1d..11e34a7952 100644
--- a/packages/backend/src/core/DriveService.ts
+++ b/packages/backend/src/core/DriveService.ts
@@ -739,7 +739,7 @@ export class DriveService {
 	}
 
 	@bindThis
-	public async deleteFile(file: MiDriveFile, isExpired = false, deleter?: MiUser) {
+	public async deleteFile(file: MiDriveFile, isExpired = false, deleter?: { id: string }) {
 		await this.queueService.createDeleteFileJob(file.id, isExpired, deleter?.id);
 	}
 
diff --git a/packages/backend/src/core/NoteDeleteService.ts b/packages/backend/src/core/NoteDeleteService.ts
index cd23a1751a..bd5deec596 100644
--- a/packages/backend/src/core/NoteDeleteService.ts
+++ b/packages/backend/src/core/NoteDeleteService.ts
@@ -160,7 +160,7 @@ export class NoteDeleteService {
 				}
 
 				for (const cascade of cascadingNotes) {
-					if (this.userEntityService.isRemoteUser(cascade.user)) {
+					if (isRemoteUser(cascade.user)) {
 						if (!isPureRenote(cascade)) {
 							const i = await this.federatedInstanceService.fetchOrRegister(cascade.user.host);
 							await this.collapsedQueueService.updateInstanceQueue.enqueue(i.id, { notesCountDelta: -1 });
diff --git a/packages/backend/src/core/ReactionService.ts b/packages/backend/src/core/ReactionService.ts
index d818d148f0..8fe3b04180 100644
--- a/packages/backend/src/core/ReactionService.ts
+++ b/packages/backend/src/core/ReactionService.ts
@@ -10,7 +10,6 @@ import type { EmojisRepository, NoteReactionsRepository, UsersRepository, NotesR
 import { IdentifiableError } from '@/misc/identifiable-error.js';
 import { isLocalUser, isRemoteUser } from '@/models/User.js';
 import type { MiRemoteUser, MiUser } from '@/models/User.js';
-import { isLocalUser, isRemoteUser } from '@/models/User.js';
 import type { MiNote } from '@/models/Note.js';
 import { IdService } from '@/core/IdService.js';
 import { MiNoteReaction } from '@/models/NoteReaction.js';
@@ -228,7 +227,7 @@ export class ReactionService implements OnModuleInit {
 				.execute();
 		}
 
-		await this.collapsedQueueService.updateUserQueue.enqueue(user.id, { updatedAt: new Date() });
+		await this.collapsedQueueService.updateUserQueue.enqueue(user.id, { updatedAt: this.timeService.date });
 
 		// 30%の確率、セルフではない、3日以内に投稿されたノートの場合ハイライト用ランキング更新
 		if (
@@ -346,7 +345,7 @@ export class ReactionService implements OnModuleInit {
 				.execute();
 		}
 
-		await this.collapsedQueueService.updateUserQueue.enqueue(user.id, { updatedAt: new Date() });
+		await this.collapsedQueueService.updateUserQueue.enqueue(user.id, { updatedAt: this.timeService.date });
 
 		this.globalEventService.publishNoteStream(note.id, 'unreacted', {
 			reaction: this.decodeReaction(exist.reaction).reaction,
diff --git a/packages/backend/src/core/activitypub/models/ApPersonService.ts b/packages/backend/src/core/activitypub/models/ApPersonService.ts
index 66311d4655..051972af19 100644
--- a/packages/backend/src/core/activitypub/models/ApPersonService.ts
+++ b/packages/backend/src/core/activitypub/models/ApPersonService.ts
@@ -122,7 +122,6 @@ export class ApPersonService implements OnModuleInit {
 		private readonly cacheManagementService: CacheManagementService,
 		private readonly utilityService: UtilityService,
 		private readonly apUtilityService: ApUtilityService,
-		private readonly idService: IdService,
 		private readonly timeService: TimeService,
 		private readonly queueService: QueueService,
 		private readonly collapsedQueueService: CollapsedQueueService,
@@ -952,7 +951,7 @@ export class ApPersonService implements OnModuleInit {
 		resolver ??= this.apResolverService.createResolver();
 
 		// Mark as updated
-		await this.usersRepository.update({ id: userId }, { lastFetchedFeaturedAt: new Date() });
+		await this.usersRepository.update({ id: userId }, { lastFetchedFeaturedAt: this.timeService.date });
 		await this.internalEventService.emit('remoteUserUpdated', { id: userId });
 
 		// Resolve and regist Notes
diff --git a/packages/backend/src/misc/collapsed-queue.ts b/packages/backend/src/misc/collapsed-queue.ts
index 9bfcc38e55..7f7e7bb03b 100644
--- a/packages/backend/src/misc/collapsed-queue.ts
+++ b/packages/backend/src/misc/collapsed-queue.ts
@@ -3,8 +3,8 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-import { TimeService, type TimerHandle } from '@/global/TimeService.js';
 import promiseLimit from 'promise-limit';
+import type { TimeService, TimerHandle } from '@/global/TimeService.js';
 import { InternalEventService } from '@/core/InternalEventService.js';
 import { bindThis } from '@/decorators.js';
 import { Serialized } from '@/types.js';
@@ -31,7 +31,7 @@ export class CollapsedQueue<V> {
 	private readonly deferredKeys = new Set<string>();
 
 	constructor(
-		private readonly internalEventService: InternalEventervice,
+		private readonly internalEventService: InternalEventService,
 		private readonly timeService: TimeService,
 		public readonly name: string,
 		private readonly timeout: number,
@@ -85,7 +85,7 @@ export class CollapsedQueue<V> {
 		const job = this.jobs.get(key);
 		if (!job) return;
 
-		clearTimeout(job.timer);
+		this.timeService.stopTimer(job.timer);
 		this.jobs.delete(key);
 		await this.internalEventService.emit('collapsedQueueDefer', { name: this.name, key, deferred: false });
 	}
@@ -93,7 +93,7 @@ export class CollapsedQueue<V> {
 	@bindThis
 	async performAllNow() {
 		for (const job of this.jobs.values()) {
-			clearTimeout(job.timer);
+			this.timeService.stopTimer(job.timer);
 		}
 
 		const entries = Array.from(this.jobs.entries());
diff --git a/packages/backend/src/server/api/GetterService.ts b/packages/backend/src/server/api/GetterService.ts
index ee8018dfab..47b4e2f1bc 100644
--- a/packages/backend/src/server/api/GetterService.ts
+++ b/packages/backend/src/server/api/GetterService.ts
@@ -12,7 +12,6 @@ import { isRemoteUser, isLocalUser } from '@/models/User.js';
 import type { MiNote } from '@/models/Note.js';
 import { CacheService } from '@/core/CacheService.js';
 import { bindThis } from '@/decorators.js';
-import { CacheService } from '@/core/CacheService.js';
 
 @Injectable()
 export class GetterService {
diff --git a/packages/backend/test/unit/activitypub.ts b/packages/backend/test/unit/activitypub.ts
index 1e2cc02f2f..85e27012dc 100644
--- a/packages/backend/test/unit/activitypub.ts
+++ b/packages/backend/test/unit/activitypub.ts
@@ -30,7 +30,6 @@ import { MiMeta, MiNote, MiUser, MiUserKeypair, UserNotePiningsRepository, UserP
 import { DI } from '@/di-symbols.js';
 import { secureRndstr } from '@/misc/secure-rndstr.js';
 import { DownloadService } from '@/core/DownloadService.js';
-import { ApUtilityService } from '@/core/activitypub/ApUtilityService.js';
 import { genAidx } from '@/misc/id/aidx.js';
 import { IdService } from '@/core/IdService.js';
 import { MockResolver } from '../misc/mock-resolver.js';
@@ -186,8 +185,8 @@ describe('ActivityPub', () => {
 		cacheManagementService = app.get(CacheManagementService);
 		mockConsole = app.get<MockConsole>(DI.console);
 		notesRepository = app.get<NotesRepository>(DI.notesRepository);
-	});
 		userNotePiningsRepository = app.get<UserNotePiningsRepository>(DI.userNotePiningsRepository);
+	});
 
 	afterAll(async () => {
 		await app.close();