--- a/testing/web-platform/tests/fetch/api/policies/referrer-origin.js
+++ b/testing/web-platform/tests/fetch/api/policies/referrer-origin.js
@@ -1,21 +1,21 @@
 if (this.document === undefined) {
   importScripts("/resources/testharness.js");
   importScripts("../resources/utils.js");
 }
 
-var origin = "http://{{host}}:{{ports[http][0]}}";
+var referrerOrigin = "http://{{host}}:{{ports[http][0]}}/";
 var fetchedUrl = RESOURCES_DIR + "inspect-headers.py?headers=referer";
 
 promise_test(function(test) {
   return fetch(fetchedUrl).then(function(resp) {
     assert_equals(resp.status, 200, "HTTP status is 200");
     assert_equals(resp.type , "basic", "Response's type is basic");
-    assert_equals(resp.headers.get("x-request-referer"), origin, "request's referrer is " + origin);
+    assert_equals(resp.headers.get("x-request-referer"), referrerOrigin, "request's referrer is " + referrerOrigin);
   });
 }, "Request's referrer is origin");
 
 promise_test(function(test) {
   var referrerUrl = "http://{{domains[www]}}:{{ports[http][0]}}/";
   return promise_rejects(test, new TypeError(), fetch(fetchedUrl, { "referrer":  referrerUrl}));
 }, "Throw a TypeError referrer is not same-origin with origin");