--- a/testing/web-platform/meta/MANIFEST.json
+++ b/testing/web-platform/meta/MANIFEST.json
@@ -378708,16 +378708,26 @@
     ]
    ],
    "xhr/status-error.htm": [
     [
      "/xhr/status-error.htm",
      {}
     ]
    ],
+   "xhr/sync-no-progress.any.js": [
+    [
+     "/xhr/sync-no-progress.any.html",
+     {}
+    ],
+    [
+     "/xhr/sync-no-progress.any.worker.html",
+     {}
+    ]
+   ],
    "xhr/template-element.html": [
     [
      "/xhr/template-element.html",
      {}
     ]
    ],
    "xhr/timeout-cors-async.htm": [
     [
@@ -621065,16 +621075,20 @@
   "xhr/status-basic.htm": [
    "f8cfccecc4df3b25091dc74639d9615101307daf",
    "testharness"
   ],
   "xhr/status-error.htm": [
    "42182437d8c1015339825c035127877f4970decb",
    "testharness"
   ],
+  "xhr/sync-no-progress.any.js": [
+   "db6171c61a37cd98ea5b9c1549432f1e2b53e7eb",
+   "testharness"
+  ],
   "xhr/template-element.html": [
    "748f12beaa646e244f8312afd545f56075cac727",
    "testharness"
   ],
   "xhr/timeout-cors-async.htm": [
    "d5b0fa4ab0907d58f7cf5796c2bb740e5f91a82f",
    "testharness"
   ],

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/tests/xhr/sync-no-progress.any.js
@@ -0,0 +1,12 @@
+test(t => {
+  let xhr = new XMLHttpRequest();
+  let loadEventFired = false;
+  xhr.onprogress = t.unreached_func('progress event should not be fired');
+  xhr.onload = () => {
+    loadEventFired = true;
+  };
+  xhr.open('GET', 'resources/trickle.py?count=4&delay=150', false);
+  xhr.send();
+  // Check the load event as a sanity check that the test is working.
+  assert_true(loadEventFired, 'load event should have fired');
+}, 'progress event should not be fired by sync XHR');