diff --git a/service-workers/service-worker/fetch-request-xhr-sync-on-worker.https.html b/service-workers/service-worker/fetch-request-xhr-sync-on-worker.https.html
new file mode 100644
index 00000000000000..9f18096aa29bb4
--- /dev/null
+++ b/service-workers/service-worker/fetch-request-xhr-sync-on-worker.https.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<title>Service Worker: Synchronous XHR on Worker is intercepted</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="resources/test-helpers.sub.js"></script>
+<script>
+'use strict';
+
+promise_test((t) => {
+    const url = 'resources/fetch-request-xhr-sync-on-worker-worker.js';
+    const scope = 'resources/fetch-request-xhr-sync-on-worker-scope/';
+    const non_existent_file = 'non-existent-file.txt';
+
+    // In Chromium, the service worker scope matching for workers is based on
+    // the URL of the parent HTML. So this test creates an iframe which is
+    // controlled by the service worker first, and creates a worker from the
+    // iframe.
+    return service_worker_unregister_and_register(t, url, scope)
+      .then((registration) => {
+          t.add_cleanup(() => registration.unregister());
+          return wait_for_state(t, registration.installing, 'activated');
+        })
+      .then(() => { return with_iframe(scope + 'iframe_page'); })
+      .then((frame) => {
+          t.add_cleanup(() => frame.remove());
+          return frame.contentWindow.performSyncXHROnWorker(non_existent_file);
+        })
+      .then((result) => {
+          assert_equals(
+              result.status,
+              200,
+              'HTTP response status code for intercepted request'
+            );
+          assert_equals(
+            result.responseText,
+              'Response from service worker',
+              'HTTP response text for intercepted request'
+            );
+        });
+  }, 'Verify SyncXHR on Worker is intercepted');
+</script>
diff --git a/service-workers/service-worker/resources/fetch-request-xhr-sync-on-worker-worker.js b/service-workers/service-worker/resources/fetch-request-xhr-sync-on-worker-worker.js
new file mode 100644
index 00000000000000..0d24ffc1f33330
--- /dev/null
+++ b/service-workers/service-worker/resources/fetch-request-xhr-sync-on-worker-worker.js
@@ -0,0 +1,41 @@
+'use strict';
+
+self.onfetch = function(event) {
+  if (event.request.url.indexOf('non-existent-file.txt') !== -1) {
+    event.respondWith(new Response('Response from service worker'));
+  } else if (event.request.url.indexOf('/iframe_page') !== -1) {
+    event.respondWith(new Response(
+        '<!DOCTYPE html>\n' +
+        '<script>\n' +
+        'function performSyncXHROnWorker(url) {\n' +
+        '  return new Promise((resolve) => {\n' +
+        '    var worker =\n' +
+        '        new Worker(\'./worker_script\');\n' +
+        '    worker.addEventListener(\'message\', (msg) => {\n' +
+        '      resolve(msg.data);\n' +
+        '    });\n' +
+        '    worker.postMessage({\n' +
+        '      url: url\n' +
+        '    });\n' +
+        '  });\n' +
+        '}\n' +
+        '</script>',
+        {
+          headers: [['content-type', 'text/html']]
+        }));
+  } else if (event.request.url.indexOf('/worker_script') !== -1) {
+    event.respondWith(new Response(
+        'self.onmessage = (msg) => {' +
+        '  const syncXhr = new XMLHttpRequest();' +
+        '  syncXhr.open(\'GET\', msg.data.url, false);' +
+        '  syncXhr.send();' +
+        '  self.postMessage({' +
+        '    status: syncXhr.status,' +
+        '    responseText: syncXhr.responseText' +
+        '  });' +
+        '}',
+        {
+          headers: [['content-type', 'application/javascript']]
+        }));
+  }
+};
