diff --git a/tests/wpt/metadata/MANIFEST.json b/tests/wpt/metadata/MANIFEST.json
index d9ddaeefa1f..5c86168c365 100644
--- a/tests/wpt/metadata/MANIFEST.json
+++ b/tests/wpt/metadata/MANIFEST.json
@@ -624649,7 +624649,7 @@
    "testharness"
   ],
   "html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events-onerror.html": [
-   "c76d531c43ec3ecc8cbf3c21f3a0ffa4db7be715",
+   "b6f6d63e0aa9660909c93e7366f80f4f36c97ecf",
    "testharness"
   ],
   "html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events.dedicatedworker.html": [
diff --git a/tests/wpt/web-platform-tests/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events-onerror.html b/tests/wpt/web-platform-tests/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events-onerror.html
index c76d531c43e..b6f6d63e0aa 100644
--- a/tests/wpt/web-platform-tests/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events-onerror.html
+++ b/tests/wpt/web-platform-tests/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events-onerror.html
@@ -15,7 +15,7 @@ async_test(function(t) {
 
   window.onerror = function (msg, url, line, col, error) {
     t.step(function() {
-      assert_equals(msg, 'Uncaught Error: e2');
+      assert_true(msg.includes('e2'));
       assert_equals(error, e2);
     });
     t.done();