diff --git a/test/helpers/sinon.js b/test/helpers/sinon.js
index 398a2e36c..4112185dc 100644
--- a/test/helpers/sinon.js
+++ b/test/helpers/sinon.js
@@ -4018,7 +4018,7 @@ if (typeof module !== 'undefined' && module.exports) {
 /**
  * The Sinon "server" mimics a web server that receives requests from
  * sinon.FakeXMLHttpRequest and provides an API to respond to those requests,
- * both synchronously and asynchronously. To respond synchronuously, canned
+ * both synchronously and asynchronously. To respond synchronously, canned
  * answers have to be provided upfront.
  *
  * @author Christian Johansen (christian@cjohansen.no)