diff --git a/packages/misskey-js/test-d/api.ts b/packages/misskey-js/test-d/api.ts
index 1c2a142e8..4b72ff4e9 100644
--- a/packages/misskey-js/test-d/api.ts
+++ b/packages/misskey-js/test-d/api.ts
@@ -1,5 +1,5 @@
 import { expectType } from 'tsd';
-import * as Misskey from '../src';
+import * as Misskey from '../src/index.js';
 
 describe('API', () => {
 	test('success', async () => {
diff --git a/packages/misskey-js/test-d/streaming.ts b/packages/misskey-js/test-d/streaming.ts
index 6b186bd45..b46b06e4d 100644
--- a/packages/misskey-js/test-d/streaming.ts
+++ b/packages/misskey-js/test-d/streaming.ts
@@ -1,5 +1,5 @@
 import { expectType } from 'tsd';
-import * as Misskey from '../src';
+import * as Misskey from '../src/index.js';
 
 describe('Streaming', () => {
 	test('emit type', async () => {
diff --git a/packages/misskey-js/test/api.ts b/packages/misskey-js/test/api.ts
index 6f9e656fe..fa31d23fa 100644
--- a/packages/misskey-js/test/api.ts
+++ b/packages/misskey-js/test/api.ts
@@ -1,5 +1,5 @@
 import { enableFetchMocks } from 'jest-fetch-mock';
-import { APIClient, isAPIError } from '../src/api';
+import { APIClient, isAPIError } from '../src/api.js';
 
 enableFetchMocks();
 
diff --git a/packages/misskey-js/test/streaming.ts b/packages/misskey-js/test/streaming.ts
index 9f6615a8d..06b55cd8a 100644
--- a/packages/misskey-js/test/streaming.ts
+++ b/packages/misskey-js/test/streaming.ts
@@ -1,5 +1,5 @@
 import WS from 'jest-websocket-mock';
-import Stream from '../src/streaming';
+import Stream from '../src/streaming.js';
 
 describe('Streaming', () => {
 	test('useChannel', async () => {