diff --git a/app/javascript/mastodon/utils/__tests__/html-test.s b/app/javascript/mastodon/utils/__tests__/html-test.ts
similarity index 67%
rename from app/javascript/mastodon/utils/__tests__/html-test.s
rename to app/javascript/mastodon/utils/__tests__/html-test.ts
index d948cf4c5d..99bfdcb801 100644
--- a/app/javascript/mastodon/utils/__tests__/html-test.s
+++ b/app/javascript/mastodon/utils/__tests__/html-test.ts
@@ -3,7 +3,9 @@ import * as html from '../html';
 describe('html', () => {
   describe('unescapeHTML', () => {
     it('returns unescaped HTML', () => {
-      const output = html.unescapeHTML('<p>lorem</p><p>ipsum</p><br>&lt;br&gt;');
+      const output = html.unescapeHTML(
+        '<p>lorem</p><p>ipsum</p><br>&lt;br&gt;',
+      );
       expect(output).toEqual('lorem\n\nipsum\n<br>');
     });
   });