diff --git a/mediacapture-streams/MediaStreamTrack-iframe-audio-transfer.https.html b/mediacapture-streams/MediaStreamTrack-iframe-audio-transfer.https.html
index e1df23a24a135ab..963f42c4cbbb89a 100644
--- a/mediacapture-streams/MediaStreamTrack-iframe-audio-transfer.https.html
+++ b/mediacapture-streams/MediaStreamTrack-iframe-audio-transfer.https.html
@@ -2,9 +2,12 @@
 <title>MediaStreamTrack transfer to iframe</title>
 <script src=/resources/testharness.js></script>
 <script src=/resources/testharnessreport.js></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
 <script>
 promise_test(async () => {
   const iframe = document.createElement("iframe");
+  await test_driver.bless('getDisplayMedia');
   const stream = await navigator.mediaDevices.getDisplayMedia({audio:true, video: true});
   const track = stream.getAudioTracks()[0];
   const cloned_track = track.clone();
diff --git a/mediacapture-streams/MediaStreamTrack-iframe-transfer.https.html b/mediacapture-streams/MediaStreamTrack-iframe-transfer.https.html
index 54fc2b2d164eef7..745f314e6fbdda5 100644
--- a/mediacapture-streams/MediaStreamTrack-iframe-transfer.https.html
+++ b/mediacapture-streams/MediaStreamTrack-iframe-transfer.https.html
@@ -2,9 +2,12 @@
 <title>MediaStreamTrack transfer to iframe</title>
 <script src=/resources/testharness.js></script>
 <script src=/resources/testharnessreport.js></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
 <script>
 promise_test(async () => {
   const iframe = document.createElement("iframe");
+  await test_driver.bless('getDisplayMedia');
   const stream = await navigator.mediaDevices.getDisplayMedia({video: true});
   const track = stream.getVideoTracks()[0];
   const cloned_track = track.clone();
diff --git a/speculation-rules/prerender/resources/screen-capture.https.html b/speculation-rules/prerender/resources/screen-capture.https.html
index 55f1995643dfb05..1304b9d74b0b9bb 100644
--- a/speculation-rules/prerender/resources/screen-capture.https.html
+++ b/speculation-rules/prerender/resources/screen-capture.https.html
@@ -2,30 +2,23 @@
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/speculation-rules/prerender/resources/utils.js"></script>
-<script src="/speculation-rules/prerender/resources/deferred-promise-utils.js"></script>
 <script>
 
-const params = new URLSearchParams(location.search);
+assert_true(document.prerendering);
 
-// The main test page (restriction-screen-capture.https.html) loads the
-// initiator page, then the initiator page will prerender itself with the
-// `prerendering` parameter.
-const isPrerendering = params.has('prerendering');
+async function invokeScreenCaptureAPI(){
+  const bc = new PrerenderChannel('prerender-channel');
 
-if (!isPrerendering) {
-  loadInitiatorPage();
-} else {
-  const prerenderEventCollector = new PrerenderEventCollector();
-  const promise = new Promise(async (resolve, reject) => {
-    try {
-      await navigator.mediaDevices.getDisplayMedia({video: true});
-      resolve();
-    } catch (e) {
-      reject(`navigator.mediaDevices.getDisplayMedia error: ${e.toString()}`);
-    }
-  });
-  prerenderEventCollector.start(
-      promise, 'navigator.mediaDevices.getDisplayMedia');
+  try {
+    await navigator.mediaDevices.getDisplayMedia();
+    bc.postMessage('unexpected success');
+  } catch (err){
+    bc.postMessage(err.name);
+  } finally {
+    bc.close();
+  }
 }
 
+invokeScreenCaptureAPI();
+
 </script>
diff --git a/speculation-rules/prerender/restriction-screen-capture.https.html b/speculation-rules/prerender/restriction-screen-capture.https.html
index e4b958d338a9a88..2cd7fb662f2c7e8 100644
--- a/speculation-rules/prerender/restriction-screen-capture.https.html
+++ b/speculation-rules/prerender/restriction-screen-capture.https.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<title>Access to the Screen Capture API is deferred</title>
+<title>Prerendering cannot invoke the Screen Capture API</title>
 <meta name="timeout" content="long">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
@@ -12,8 +12,7 @@
 
 promise_test(async t => {
   const uid = token();
-  const bc = new PrerenderChannel('test-channel', uid);
-  t.add_cleanup(_ => bc.close());
+  const bc = new PrerenderChannel('prerender-channel', uid);
 
   const gotMessage = new Promise(resolve => {
     bc.addEventListener('message', e => {
@@ -22,35 +21,15 @@
       once: true
     });
   });
-  const url = `resources/screen-capture.https.html?uid=${uid}`;
-  window.open(url, '_blank', 'noopener');
 
+  // Start prerendering a page that attempts to invoke the Screen Capture API.
+  // This API is activated-gated so it's expected to fail:
+  // https://wicg.github.io/nav-speculation/prerendering.html#implicitly-restricted
+  startPrerendering(`resources/screen-capture.https.html?uid=${uid}`);
   const result = await gotMessage;
-  const expected = [
-    {
-      event: 'started waiting navigator.mediaDevices.getDisplayMedia',
-      prerendering: true
-    },
-    {
-      event: 'prerendering change',
-      prerendering: false
-    },
-    {
-      event: 'finished waiting navigator.mediaDevices.getDisplayMedia',
-      prerendering: false
-    },
-  ];
-  assert_equals(result.length, expected.length);
-  for (let i = 0; i < result.length; i++) {
-    assert_equals(result[i].event, expected[i].event, `event[${i}]`);
-    assert_equals(result[i].prerendering, expected[i].prerendering,
-      `prerendering[${i}]`);
-  }
-
-  // Send a close signal to PrerenderEventCollector on the prerendered page.
-  new PrerenderChannel('close', uid).postMessage('');
-}, `The access to the Screen Capture API should be deferred until the
-    prerendered page is activated`);
+  assert_equals(result, 'InvalidStateError');
+  bc.close();
+}, `prerendering pages should not be able to invoke the Screen Capture API`);
 
 </script>
 </body>
