diff --git a/packages/backend/test/unit/MetaService.ts b/packages/backend/test/unit/MetaService.ts
index 19c98eab3d..056838e180 100644
--- a/packages/backend/test/unit/MetaService.ts
+++ b/packages/backend/test/unit/MetaService.ts
@@ -11,6 +11,7 @@ import { GlobalModule } from '@/GlobalModule.js';
 import { DI } from '@/di-symbols.js';
 import { MetaService } from '@/core/MetaService.js';
 import { CoreModule } from '@/core/CoreModule.js';
+import { MetasRepository } from '@/models/_.js';
 import type { TestingModule } from '@nestjs/testing';
 import type { DataSource } from 'typeorm';
 
@@ -39,8 +40,8 @@ describe('MetaService', () => {
 	});
 
 	test('fetch (cache)', async () => {
-		const db = app.get<DataSource>(DI.db);
-		const spy = jest.spyOn(db, 'transaction');
+		const metasRepository = app.get<MetasRepository>(DI.metasRepository);
+		const spy = jest.spyOn(metasRepository, 'createQueryBuilder');
 
 		const result = await metaService.fetch();
 
@@ -49,12 +50,12 @@ describe('MetaService', () => {
 	});
 
 	test('fetch (force)', async () => {
-		const db = app.get<DataSource>(DI.db);
-		const spy = jest.spyOn(db, 'transaction');
+		const metasRepository = app.get<MetasRepository>(DI.metasRepository);
+		const spy = jest.spyOn(metasRepository, 'createQueryBuilder');
 
 		const result = await metaService.fetch(true);
 
 		expect(result.id).toBe('x');
-		expect(spy).toHaveBeenCalledTimes(1);
+		expect(spy).toHaveBeenCalled();
 	});
 });
diff --git a/packages/backend/test/unit/RoleService.ts b/packages/backend/test/unit/RoleService.ts
index 553ff0982a..839402418e 100644
--- a/packages/backend/test/unit/RoleService.ts
+++ b/packages/backend/test/unit/RoleService.ts
@@ -15,6 +15,7 @@ import type { MockFunctionMetadata } from 'jest-mock';
 import { GlobalModule } from '@/GlobalModule.js';
 import { RoleService } from '@/core/RoleService.js';
 import {
+	InstancesRepository,
 	MiMeta,
 	MiRole,
 	MiRoleAssignment,
@@ -39,6 +40,7 @@ const moduleMocker = new ModuleMocker(global);
 describe('RoleService', () => {
 	let app: TestingModule;
 	let roleService: RoleService;
+	let instancesRepository: InstancesRepository;
 	let usersRepository: UsersRepository;
 	let rolesRepository: RolesRepository;
 	let roleAssignmentsRepository: RoleAssignmentsRepository;
@@ -47,6 +49,19 @@ describe('RoleService', () => {
 	let clock: lolex.InstalledClock;
 
 	async function createUser(data: Partial<MiUser> = {}) {
+		if (data.host != null) {
+			await instancesRepository
+				.createQueryBuilder('instance')
+				.insert()
+				.values({
+					id: genAidx(Date.now()),
+					firstRetrievedAt: new Date(),
+					host: data.host,
+				})
+				.orIgnore()
+				.execute();
+		}
+
 		const un = secureRndstr(16);
 		const x = await usersRepository.insert({
 			id: genAidx(Date.now()),
@@ -145,6 +160,7 @@ describe('RoleService', () => {
 		app.enableShutdownHooks();
 
 		roleService = app.get<RoleService>(RoleService);
+		instancesRepository = app.get<InstancesRepository>(DI.instancesRepository);
 		usersRepository = app.get<UsersRepository>(DI.usersRepository);
 		rolesRepository = app.get<RolesRepository>(DI.rolesRepository);
 		roleAssignmentsRepository = app.get<RoleAssignmentsRepository>(DI.roleAssignmentsRepository);
diff --git a/packages/backend/test/unit/UserSearchService.ts b/packages/backend/test/unit/UserSearchService.ts
index 697425beb8..a6b331d1cb 100644
--- a/packages/backend/test/unit/UserSearchService.ts
+++ b/packages/backend/test/unit/UserSearchService.ts
@@ -7,16 +7,18 @@ import { Test, TestingModule } from '@nestjs/testing';
 import { describe, jest, test } from '@jest/globals';
 import { In } from 'typeorm';
 import { UserSearchService } from '@/core/UserSearchService.js';
-import { FollowingsRepository, MiUser, UserProfilesRepository, UsersRepository } from '@/models/_.js';
+import { FollowingsRepository, InstancesRepository, MiUser, UserProfilesRepository, UsersRepository } from '@/models/_.js';
 import { IdService } from '@/core/IdService.js';
 import { GlobalModule } from '@/GlobalModule.js';
 import { DI } from '@/di-symbols.js';
 import { UserEntityService } from '@/core/entities/UserEntityService.js';
+import { genAidx } from '@/misc/id/aidx.js';
 
 describe('UserSearchService', () => {
 	let app: TestingModule;
 	let service: UserSearchService;
 
+	let instancesRepository: InstancesRepository;
 	let usersRepository: UsersRepository;
 	let followingsRepository: FollowingsRepository;
 	let idService: IdService;
@@ -35,6 +37,19 @@ describe('UserSearchService', () => {
 	let bobby: MiUser;
 
 	async function createUser(data: Partial<MiUser> = {}) {
+		if (data.host != null) {
+			await instancesRepository
+				.createQueryBuilder('instance')
+				.insert()
+				.values({
+					id: genAidx(Date.now()),
+					firstRetrievedAt: new Date(),
+					host: data.host,
+				})
+				.orIgnore()
+				.execute();
+		}
+
 		const user = await usersRepository
 			.insert({
 				id: idService.gen(),
@@ -104,6 +119,7 @@ describe('UserSearchService', () => {
 
 		await app.init();
 
+		instancesRepository = app.get<InstancesRepository>(DI.instancesRepository);
 		usersRepository = app.get(DI.usersRepository);
 		userProfilesRepository = app.get(DI.userProfilesRepository);
 		followingsRepository = app.get(DI.followingsRepository);
diff --git a/packages/backend/test/unit/activitypub.ts b/packages/backend/test/unit/activitypub.ts
index 6f6d4c4121..94dec16401 100644
--- a/packages/backend/test/unit/activitypub.ts
+++ b/packages/backend/test/unit/activitypub.ts
@@ -103,6 +103,25 @@ describe('ActivityPub', () => {
 	let config: Config;
 
 	const metaInitial = {
+		id: 'x',
+		name: 'Test Instance',
+		shortName: 'Test Instance',
+		description: 'Test Instance',
+		langs: [] as string[],
+		pinnedUsers: [] as string[],
+		hiddenTags: [] as string[],
+		prohibitedWordsForNameOfUser: [] as string[],
+		silencedHosts: [] as string[],
+		mediaSilencedHosts: [] as string[],
+		policies: {},
+		serverRules: [] as string[],
+		bannedEmailDomains: [] as string[],
+		preservedUsernames: [] as string[],
+		bubbleInstances: [] as string[],
+		trustedLinkUrlPatterns: [] as string[],
+		federation: 'all',
+		federationHosts: [] as string[],
+		allowUnsignedFetch: 'always',
 		cacheRemoteFiles: true,
 		cacheRemoteSensitiveFiles: true,
 		enableFanoutTimeline: true,