diff --git a/packages/backend/src/server/oauth/OAuth2ProviderService.ts b/packages/backend/src/server/oauth/OAuth2ProviderService.ts
index 127d730762..ded2786a26 100644
--- a/packages/backend/src/server/oauth/OAuth2ProviderService.ts
+++ b/packages/backend/src/server/oauth/OAuth2ProviderService.ts
@@ -1,6 +1,5 @@
 import dns from 'node:dns/promises';
 import { fileURLToPath } from 'node:url';
-import { ServerResponse } from 'node:http';
 import { Inject, Injectable } from '@nestjs/common';
 import { JSDOM } from 'jsdom';
 import httpLinkHeader from 'http-link-header';
@@ -19,12 +18,13 @@ import type { Config } from '@/config.js';
 import { DI } from '@/di-symbols.js';
 import { bindThis } from '@/decorators.js';
 import type { AccessTokensRepository, UsersRepository } from '@/models/index.js';
-import { IdService } from '@/core/IdService.js';
-import { CacheService } from '@/core/CacheService.js';
+import type { IdService } from '@/core/IdService.js';
+import type { CacheService } from '@/core/CacheService.js';
 import type { LocalUser } from '@/models/entities/User.js';
 import { MemoryKVCache } from '@/misc/cache.js';
-import { LoggerService } from '@/core/LoggerService.js';
+import type { LoggerService } from '@/core/LoggerService.js';
 import Logger from '@/logger.js';
+import type { ServerResponse } from 'node:http';
 import type { FastifyInstance } from 'fastify';
 
 // Follows https://indieauth.spec.indieweb.org/#client-identifier
diff --git a/packages/backend/test/e2e/oauth.ts b/packages/backend/test/e2e/oauth.ts
index 8a11d1ff76..dbef0e457a 100644
--- a/packages/backend/test/e2e/oauth.ts
+++ b/packages/backend/test/e2e/oauth.ts
@@ -9,7 +9,7 @@ import * as assert from 'assert';
 import { AuthorizationCode, type AuthorizationTokenConfig } from 'simple-oauth2';
 import pkceChallenge from 'pkce-challenge';
 import { JSDOM } from 'jsdom';
-import * as misskey from 'misskey-js';
+import type * as misskey from 'misskey-js';
 import Fastify, { type FastifyReply, type FastifyInstance } from 'fastify';
 import { port, relativeFetch, signup, startServer } from '../utils.js';
 import type { INestApplicationContext } from '@nestjs/common';
@@ -224,7 +224,7 @@ describe('OAuth', () => {
 		});
 		assert.strictEqual(createResponse.status, 200);
 
-		const createResponseBody = await createResponse.json() as { createdNote: Note };
+		const createResponseBody = await createResponse.json() as misskey.Endpoints['notes/create']['res'];
 		assert.strictEqual(createResponseBody.createdNote.text, 'test');
 	});
 
@@ -303,10 +303,10 @@ describe('OAuth', () => {
 		});
 		assert.strictEqual(createResponseAlice.status, 200);
 
-		const createResponseBodyAlice = await createResponseAlice.json() as { createdNote: misskey.entities.Note };
+		const createResponseBodyAlice = await createResponseAlice.json() as misskey.Endpoints['notes/create']['res'];
 		assert.strictEqual(createResponseBodyAlice.createdNote.user.username, 'alice');
 
-		const createResponseBodyBob = await createResponseBob.json() as { createdNote: misskey.entities.Note };
+		const createResponseBodyBob = await createResponseBob.json() as misskey.Endpoints['notes/create']['res'];
 		assert.strictEqual(createResponseBodyBob.createdNote.user.username, 'bob');
 	});