diff --git a/app/soapbox/utils/__tests__/badges.test.ts b/app/soapbox/utils/__tests__/badges.test.ts
new file mode 100644
index 0000000000..1f3349fccc
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+++ b/app/soapbox/utils/__tests__/badges.test.ts
@@ -0,0 +1,43 @@
+import { normalizeAccount } from 'soapbox/normalizers';
+
+import {
+  tagToBadge,
+  badgeToTag,
+  filterBadges,
+  getTagDiff,
+  getBadges,
+} from '../badges';
+
+import type { Account } from 'soapbox/types/entities';
+
+test('tagToBadge', () => {
+  expect(tagToBadge('yolo')).toEqual('badge:yolo');
+});
+
+test('badgeToTag', () => {
+  expect(badgeToTag('badge:yolo')).toEqual('yolo');
+  expect(badgeToTag('badge:badge:')).toEqual('badge:');
+});
+
+test('filterBadges', () => {
+  const tags = ['one', 'badge:two', 'badge:three', 'four'];
+  const badges = ['badge:two', 'badge:three'];
+  expect(filterBadges(tags)).toEqual(badges);
+});
+
+test('getTagDiff', () => {
+  const oldTags = ['one', 'two', 'three'];
+  const newTags = ['three', 'four', 'five'];
+
+  const expected = {
+    added: ['four', 'five'],
+    removed: ['one', 'two'],
+  };
+
+  expect(getTagDiff(oldTags, newTags)).toEqual(expected);
+});
+
+test('getBadges', () => {
+  const account = normalizeAccount({ id: '1', pleroma: { tags: ['a', 'b', 'badge:c'] } }) as Account;
+  expect(getBadges(account)).toEqual(['badge:c']);
+});
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