diff --git a/packages/backend/test/e2e/mute-timeline-only.ts b/packages/backend/test/e2e/mute-timeline-only.ts
index 25d0f9a5cb..8bea7b02ad 100644
--- a/packages/backend/test/e2e/mute-timeline-only.ts
+++ b/packages/backend/test/e2e/mute-timeline-only.ts
@@ -6,6 +6,7 @@
 process.env.NODE_ENV = 'test';
 
 import * as assert from 'assert';
+import { describe, test, beforeAll } from 'vitest';
 import { api, post, react, signup, waitFire } from '../utils.js';
 import type * as misskey from 'misskey-js';
 
diff --git a/packages/frontend/src/os.ts b/packages/frontend/src/os.ts
index 93967dac1f..b38073a2ee 100644
--- a/packages/frontend/src/os.ts
+++ b/packages/frontend/src/os.ts
@@ -495,7 +495,7 @@ export function select<C extends OptionValue, D extends C | null = null>(props:
 }
 
 export function selectPeriod(options: { title?: string } = {}): Promise<MkPeriodDialogDoneEvent> {
-	return new Promise(async (resolve) => {
+	return new Promise((resolve) => {
 		const { dispose } = popup(defineAsyncComponent(() => import('@/components/MkPeriodDialog.vue')), {
 			title: options.title,
 		}, {