diff --git a/test/public-api/notes.e2e-spec.ts b/test/public-api/notes.e2e-spec.ts
index dda8ef9da..3492ff6d3 100644
--- a/test/public-api/notes.e2e-spec.ts
+++ b/test/public-api/notes.e2e-spec.ts
@@ -114,6 +114,15 @@ describe('Notes', () => {
         ),
       ).toEqual(content);
     });
+
+    it('fails with a existing alias', async () => {
+      await request(app.getHttpServer())
+        .post('/notes/test2')
+        .set('Content-Type', 'text/markdown')
+        .send(content)
+        .expect('Content-Type', /json/)
+        .expect(400);
+    });
   });
 
   describe('DELETE /notes/{note}', () => {