diff --git a/src/test/e2e/api/admin/tags.e2e.test.ts b/src/test/e2e/api/admin/tags.e2e.test.ts
index db17cfe42e..a98b95e206 100644
--- a/src/test/e2e/api/admin/tags.e2e.test.ts
+++ b/src/test/e2e/api/admin/tags.e2e.test.ts
@@ -209,3 +209,10 @@ test('Can bulk remove tags', async () => {
         })
         .expect(200);
 });
+
+test('backward compatibility: the API should return invalid tag names if they exist', async () => {
+    const tag = { value: '  ', type: 'simple' };
+    await db.stores.tagStore.createTag(tag);
+    const { body } = await app.request.get('/api/admin/tags').expect(200);
+    expect(body.tags).toContainEqual(tag);
+});