diff --git a/index.js b/index.js
index 598ad65..ff8fe6b 100644
--- a/index.js
+++ b/index.js
@@ -1,22 +1,10 @@
 /*! stream-to-blob. MIT License. Feross Aboukhadijeh <https://feross.org/opensource> */
 /* global Blob */
 
-module.exports = streamToBlob
+module.exports = iteratorToBlob
 
-function streamToBlob (stream, mimeType) {
-  if (mimeType != null && typeof mimeType !== 'string') {
-    throw new Error('Invalid mimetype, expected string.')
-  }
-  return new Promise((resolve, reject) => {
-    const chunks = []
-    stream
-      .on('data', chunk => chunks.push(chunk))
-      .once('end', () => {
-        const blob = mimeType != null
-          ? new Blob(chunks, { type: mimeType })
-          : new Blob(chunks)
-        resolve(blob)
-      })
-      .once('error', reject)
-  })
+async function iteratorToBlob (stream, type = '') {
+  const chunks = []
+  for await (const chunk of stream) chunks.push(chunk)
+  return new Blob(chunks, { type })
 }
diff --git a/test/basic.js b/test/basic.js
index c90eb76..0c5ac48 100644
--- a/test/basic.js
+++ b/test/basic.js
@@ -1,7 +1,9 @@
 const test = require('tape')
-const toBlob = require('../')
+// Could perhaps be replace with blob.text()
 const toBuffer = require('blob-to-buffer')
+// TODO: replace with stream.Readable.from
 const toStream = require('string-to-stream')
+const toBlob = require('../index.js')
 
 test('basic usage with Promise', t => {
   t.plan(2)