id is now independent on iv

test/aws.storage.test.js

@@ -113,8 +113,9 @@ describe('Testing Set using aws', function() {
     s3Stub.upload.callsArgWith(1, null, {});
     return storage
       .set('123', {}, 'Filename.moz', {})
-      .then(deleteKey => {
+      .then(([deleteKey, id]) => {
         assert.equal(deleteKey, buf.toString('hex'));
+        assert.notEqual(id, null);
         assert.notEqual(deleteKey, null);
         assert(expire.calledOnce);
         assert(expire.calledWith('123', 86400000));