diff --git a/test/general/node-conversions.js b/test/general/node-conversions.js
index aaadae0..13d1e88 100644
--- a/test/general/node-conversions.js
+++ b/test/general/node-conversions.js
@@ -6,7 +6,7 @@ import {
 } from 'stream' ;
 import { promisify } from 'util';
 
-import { nodeToWeb, webToNode } from '../../lib/streams';
+import { nodeToWeb, webToNode, loadStreamsPonyfill } from '../../lib/streams';
 
 async function readStreamToString(readable) {
   const chunks = [];
@@ -21,6 +21,8 @@ async function readStreamToString(readable) {
 describe('Node Conversions', function () {
   let input;
 
+  before(async () => loadStreamsPonyfill());
+
   beforeEach(function () {
     input = webToNode(nodeToWeb(NodeReadable.from(['a', 'b', 'c'])));
   });