diff --git a/packages/seroval/test.js b/packages/seroval/test.js
index c912b686..8170b818 100644
--- a/packages/seroval/test.js
+++ b/packages/seroval/test.js
@@ -1,16 +1,22 @@
 
-import { serialize, Feature } from './dist/esm/development/index.mjs';
+import { Serializer } from './dist/esm/development/index.mjs';
 
-const example = [
-  Symbol.iterator,
-  Symbol.iterator,
-  Symbol.iterator,
-  Symbol.iterator,
-  Symbol.iterator,
-];
-
-console.dir(serialize(example, {
-  disabledFeatures: Feature.ObjectAssign,
-}), {
-  depth: null
+const serializer = new Serializer({
+  globalIdentifier: '__SOLID__',
+  onHeader(value) {
+    console.log('HEADER', value);
+  },
+  onData(value) {
+    console.log([value]);
+  },
 });
+
+const delay = (value, ms) => new Promise(r => setTimeout(r, ms, value));
+
+const source = {
+  a: delay('A', 300),
+  b: delay('B', 200),
+  c: delay('C', 100),
+};
+
+serializer.write('1', source);