diff --git a/packages/frontend/test/nyaize.test.ts b/packages/misskey-js/test/nyaize.test.ts
similarity index 74%
rename from packages/frontend/test/nyaize.test.ts
rename to packages/misskey-js/test/nyaize.test.ts
index 28b90c3152..24b19bc2b9 100644
--- a/packages/frontend/test/nyaize.test.ts
+++ b/packages/misskey-js/test/nyaize.test.ts
@@ -3,15 +3,14 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-import { describe, test, assert, afterEach } from 'vitest';
-import { nyaize } from '@/scripts/nyaize.js';
+import { nyaize } from '../src/nyaize.js';
 
 function runTests(cases) {
-    for (const c of cases) {
-        const [input,expected] = c;
-        const got = nyaize(input);
-        assert.strictEqual(got, expected);
-    }
+	for (const c of cases) {
+		const [input,expected] = c;
+		const got = nyaize(input);
+		expect(got).toEqual(expected);
+	}
 }
 
 describe('nyaize', () => {