diff --git a/testing/web-platform/tests/origin-isolation/1-iframe/parent-no-child-bad-subdomain.sub.https.html b/testing/web-platform/tests/origin-isolation/1-iframe/parent-no-child-bad-subdomain.sub.https.html
index 8c18711093ce..27085aa151ed 100644
--- a/testing/web-platform/tests/origin-isolation/1-iframe/parent-no-child-bad-subdomain.sub.https.html
+++ b/testing/web-platform/tests/origin-isolation/1-iframe/parent-no-child-bad-subdomain.sub.https.html
@@ -10,7 +10,7 @@
 import {
   insertIframe,
   testSameAgentCluster,
-  testOriginIsolationRestricted
+  testGetter
 } from "../resources/helpers.mjs";
 
 let frameIndex = 0;
@@ -21,7 +21,7 @@ for (const badValue of ["", "?0", "true", "\"?1\"", "1", "?2", "(?1)"]) {
 
   // Since the header values are bad there should be no isolation
   testSameAgentCluster([self, frameIndex], `"${badValue}"`);
-  testOriginIsolationRestricted(frameIndex, false, `"${badValue}"`);
+  testGetter(frameIndex, false, `"${badValue}"`);
   ++frameIndex;
 }
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/1-iframe/parent-no-child-yes-same.sub.https.html b/testing/web-platform/tests/origin-isolation/1-iframe/parent-no-child-yes-same.sub.https.html
index 034c8a3090b8..6a82dd212e68 100644
--- a/testing/web-platform/tests/origin-isolation/1-iframe/parent-no-child-yes-same.sub.https.html
+++ b/testing/web-platform/tests/origin-isolation/1-iframe/parent-no-child-yes-same.sub.https.html
@@ -10,7 +10,7 @@
 import {
   insertIframe,
   testSameAgentCluster,
-  testOriginIsolationRestricted
+  testGetter
 } from "../resources/helpers.mjs";
 
 promise_setup(async () => {
@@ -20,6 +20,6 @@ promise_setup(async () => {
 // Since they're same-origin, and the parent loaded without isolation, the
 // child's request for isolation gets ignored, and both end up site-keyed.
 testSameAgentCluster([self, 0]);
-testOriginIsolationRestricted(self, false, "parent");
-testOriginIsolationRestricted(0, false, "child");
+testGetter(self, false, "parent");
+testGetter(0, false, "child");
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/1-iframe/parent-no-child-yes-subdomain.sub.https.html b/testing/web-platform/tests/origin-isolation/1-iframe/parent-no-child-yes-subdomain.sub.https.html
index 3894f560f042..81fc9316538a 100644
--- a/testing/web-platform/tests/origin-isolation/1-iframe/parent-no-child-yes-subdomain.sub.https.html
+++ b/testing/web-platform/tests/origin-isolation/1-iframe/parent-no-child-yes-subdomain.sub.https.html
@@ -10,7 +10,7 @@
 import {
   insertIframe,
   testDifferentAgentClusters,
-  testOriginIsolationRestricted
+  testGetter
 } from "../resources/helpers.mjs";
 
 promise_setup(async () => {
@@ -21,6 +21,6 @@ promise_setup(async () => {
 // so the parent ends up in the site-keyed agent cluster and the child in the
 // origin-keyed one.
 testDifferentAgentClusters([self, 0]);
-testOriginIsolationRestricted(self, false, "parent");
-testOriginIsolationRestricted(0, true, "child");
+testGetter(self, false, "parent");
+testGetter(0, true, "child");
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/1-iframe/parent-no-child-yeswithparams-subdomain.sub.https.html b/testing/web-platform/tests/origin-isolation/1-iframe/parent-no-child-yeswithparams-subdomain.sub.https.html
index a47729bb0325..bd12aff3a542 100644
--- a/testing/web-platform/tests/origin-isolation/1-iframe/parent-no-child-yeswithparams-subdomain.sub.https.html
+++ b/testing/web-platform/tests/origin-isolation/1-iframe/parent-no-child-yeswithparams-subdomain.sub.https.html
@@ -10,7 +10,7 @@
 import {
   insertIframe,
   testDifferentAgentClusters,
-  testOriginIsolationRestricted
+  testGetter
 } from "../resources/helpers.mjs";
 
 promise_setup(async () => {
@@ -21,6 +21,6 @@ promise_setup(async () => {
 // so the parent ends up in the site-keyed agent cluster and the child in the
 // origin-keyed one.
 testDifferentAgentClusters([self, 0]);
-testOriginIsolationRestricted(self, false, "parent");
-testOriginIsolationRestricted(0, true, "child");
+testGetter(self, false, "parent");
+testGetter(0, true, "child");
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/1-iframe/parent-yes-child-no-same.sub.https.html b/testing/web-platform/tests/origin-isolation/1-iframe/parent-yes-child-no-same.sub.https.html
index 7070c1b891dc..f1ca9a9a7cde 100644
--- a/testing/web-platform/tests/origin-isolation/1-iframe/parent-yes-child-no-same.sub.https.html
+++ b/testing/web-platform/tests/origin-isolation/1-iframe/parent-yes-child-no-same.sub.https.html
@@ -10,7 +10,7 @@
 import {
   insertIframe,
   testSameAgentCluster,
-  testOriginIsolationRestricted
+  testGetter
 } from "../resources/helpers.mjs";
 
 promise_setup(async () => {
@@ -21,6 +21,6 @@ promise_setup(async () => {
 // child's non-request for isolation gets ignored, and both end up origin-keyed.
 testSameAgentCluster([self, 0]);
 
-testOriginIsolationRestricted(self, true, "parent");
-testOriginIsolationRestricted(0, true, "child");
+testGetter(self, true, "parent");
+testGetter(0, true, "child");
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/1-iframe/parent-yes-child-no-subdomain.sub.https.html b/testing/web-platform/tests/origin-isolation/1-iframe/parent-yes-child-no-subdomain.sub.https.html
index 32e5a1768d85..be84ecac2d18 100644
--- a/testing/web-platform/tests/origin-isolation/1-iframe/parent-yes-child-no-subdomain.sub.https.html
+++ b/testing/web-platform/tests/origin-isolation/1-iframe/parent-yes-child-no-subdomain.sub.https.html
@@ -10,7 +10,7 @@
 import {
   insertIframe,
   testDifferentAgentClusters,
-  testOriginIsolationRestricted
+  testGetter
 } from "../resources/helpers.mjs";
 
 promise_setup(async () => {
@@ -22,6 +22,6 @@ promise_setup(async () => {
 // agent cluster and the child ends up in the site-keyed one.
 testDifferentAgentClusters([self, 0]);
 
-testOriginIsolationRestricted(self, true, "parent");
-testOriginIsolationRestricted(0, false, "child");
+testGetter(self, true, "parent");
+testGetter(0, false, "child");
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/1-iframe/parent-yes-child-yes-same.sub.https.html b/testing/web-platform/tests/origin-isolation/1-iframe/parent-yes-child-yes-same.sub.https.html
index a83582f747a4..b08206b4478f 100644
--- a/testing/web-platform/tests/origin-isolation/1-iframe/parent-yes-child-yes-same.sub.https.html
+++ b/testing/web-platform/tests/origin-isolation/1-iframe/parent-yes-child-yes-same.sub.https.html
@@ -10,7 +10,7 @@
 import {
   insertIframe,
   testSameAgentCluster,
-  testOriginIsolationRestricted
+  testGetter
 } from "../resources/helpers.mjs";
 
 promise_setup(async () => {
@@ -21,6 +21,6 @@ promise_setup(async () => {
 // same origin-keyed agent cluster.
 testSameAgentCluster([self, 0]);
 
-testOriginIsolationRestricted(self, true, "parent");
-testOriginIsolationRestricted(0, true, "child");
+testGetter(self, true, "parent");
+testGetter(0, true, "child");
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/1-iframe/parent-yes-child-yes-subdomain.sub.https.html b/testing/web-platform/tests/origin-isolation/1-iframe/parent-yes-child-yes-subdomain.sub.https.html
index 7010e4c5f4f1..9a426d068aef 100644
--- a/testing/web-platform/tests/origin-isolation/1-iframe/parent-yes-child-yes-subdomain.sub.https.html
+++ b/testing/web-platform/tests/origin-isolation/1-iframe/parent-yes-child-yes-subdomain.sub.https.html
@@ -10,7 +10,7 @@
 import {
   insertIframe,
   testDifferentAgentClusters,
-  testOriginIsolationRestricted
+  testGetter
 } from "../resources/helpers.mjs";
 
 promise_setup(async () => {
@@ -22,6 +22,6 @@ promise_setup(async () => {
 // origin-keyed agent cluster (the www subdomain's origin).
 testDifferentAgentClusters([self, 0]);
 
-testOriginIsolationRestricted(self, true, "parent");
-testOriginIsolationRestricted(0, true, "child");
+testGetter(self, true, "parent");
+testGetter(0, true, "child");
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/2-iframes/parent-no-child1-no-subdomain-child2-yes-subdomain.sub.https.html b/testing/web-platform/tests/origin-isolation/2-iframes/parent-no-child1-no-subdomain-child2-yes-subdomain.sub.https.html
index a8437c5966fb..55c158381275 100644
--- a/testing/web-platform/tests/origin-isolation/2-iframes/parent-no-child1-no-subdomain-child2-yes-subdomain.sub.https.html
+++ b/testing/web-platform/tests/origin-isolation/2-iframes/parent-no-child1-no-subdomain-child2-yes-subdomain.sub.https.html
@@ -10,7 +10,7 @@
 import {
   insertIframe,
   testSameAgentCluster,
-  testOriginIsolationRestricted
+  testGetter
 } from "../resources/helpers.mjs";
 
 promise_setup(async () => {
@@ -30,7 +30,7 @@ testSameAgentCluster([self, 1], "Parent to child2");
 testSameAgentCluster([0, 1], "child1 to child2");
 testSameAgentCluster([1, 0], "child2 to child1");
 
-testOriginIsolationRestricted(self, false, "parent");
-testOriginIsolationRestricted(0, false, "child1");
-testOriginIsolationRestricted(1, false, "child2");
+testGetter(self, false, "parent");
+testGetter(0, false, "child1");
+testGetter(1, false, "child2");
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/2-iframes/parent-no-child1-no-subdomain1-child2-yes-subdomain2.sub.https.html b/testing/web-platform/tests/origin-isolation/2-iframes/parent-no-child1-no-subdomain1-child2-yes-subdomain2.sub.https.html
index 06d58b3a9c40..469b1947d665 100644
--- a/testing/web-platform/tests/origin-isolation/2-iframes/parent-no-child1-no-subdomain1-child2-yes-subdomain2.sub.https.html
+++ b/testing/web-platform/tests/origin-isolation/2-iframes/parent-no-child1-no-subdomain1-child2-yes-subdomain2.sub.https.html
@@ -11,7 +11,7 @@ import {
   insertIframe,
   testSameAgentCluster,
   testDifferentAgentClusters,
-  testOriginIsolationRestricted
+  testGetter
 } from "../resources/helpers.mjs";
 
 promise_setup(async () => {
@@ -32,7 +32,7 @@ testDifferentAgentClusters([self, 1], "Parent to child2");
 testDifferentAgentClusters([0, 1], "child1 to child2");
 testDifferentAgentClusters([1, 0], "child2 to child1");
 
-testOriginIsolationRestricted(self, false, "parent");
-testOriginIsolationRestricted(0, false, "child1");
-testOriginIsolationRestricted(1, true, "child2");
+testGetter(self, false, "parent");
+testGetter(0, false, "child1");
+testGetter(1, true, "child2");
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/2-iframes/parent-no-child1-yes-subdomain-child2-no-port.sub.https.html b/testing/web-platform/tests/origin-isolation/2-iframes/parent-no-child1-yes-subdomain-child2-no-port.sub.https.html
index 68c9fe1aa6d5..eaccc8509cdc 100644
--- a/testing/web-platform/tests/origin-isolation/2-iframes/parent-no-child1-yes-subdomain-child2-no-port.sub.https.html
+++ b/testing/web-platform/tests/origin-isolation/2-iframes/parent-no-child1-yes-subdomain-child2-no-port.sub.https.html
@@ -11,7 +11,7 @@ import {
   insertIframe,
   testSameAgentCluster,
   testDifferentAgentClusters,
-  testOriginIsolationRestricted
+  testGetter
 } from "../resources/helpers.mjs";
 
 promise_setup(async () => {
@@ -31,7 +31,7 @@ testSameAgentCluster([self, 1], "Parent to child2");
 testDifferentAgentClusters([0, 1], "child1 to child2");
 testDifferentAgentClusters([1, 0], "child2 to child1");
 
-testOriginIsolationRestricted(self, false, "parent");
-testOriginIsolationRestricted(0, true, "child1");
-testOriginIsolationRestricted(1, false, "child2");
+testGetter(self, false, "parent");
+testGetter(0, true, "child1");
+testGetter(1, false, "child2");
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/2-iframes/parent-no-child1-yes-subdomain-child2-no-subdomain.sub.https.html b/testing/web-platform/tests/origin-isolation/2-iframes/parent-no-child1-yes-subdomain-child2-no-subdomain.sub.https.html
index 4e95827ce680..5adb911ae8b4 100644
--- a/testing/web-platform/tests/origin-isolation/2-iframes/parent-no-child1-yes-subdomain-child2-no-subdomain.sub.https.html
+++ b/testing/web-platform/tests/origin-isolation/2-iframes/parent-no-child1-yes-subdomain-child2-no-subdomain.sub.https.html
@@ -11,7 +11,7 @@ import {
   insertIframe,
   testSameAgentCluster,
   testDifferentAgentClusters,
-  testOriginIsolationRestricted
+  testGetter
 } from "../resources/helpers.mjs";
 
 promise_setup(async () => {
@@ -32,7 +32,7 @@ testDifferentAgentClusters([self, 1], "Parent to child2");
 testSameAgentCluster([0, 1], "child1 to child2");
 testSameAgentCluster([1, 0], "child2 to child1");
 
-testOriginIsolationRestricted(self, false, "parent");
-testOriginIsolationRestricted(0, true, "child1");
-testOriginIsolationRestricted(1, true, "child2");
+testGetter(self, false, "parent");
+testGetter(0, true, "child1");
+testGetter(1, true, "child2");
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/2-iframes/parent-yes-child1-no-subdomain-child2-no-subdomain.sub.https.html b/testing/web-platform/tests/origin-isolation/2-iframes/parent-yes-child1-no-subdomain-child2-no-subdomain.sub.https.html
index f261b8eea2cc..e463f328f19d 100644
--- a/testing/web-platform/tests/origin-isolation/2-iframes/parent-yes-child1-no-subdomain-child2-no-subdomain.sub.https.html
+++ b/testing/web-platform/tests/origin-isolation/2-iframes/parent-yes-child1-no-subdomain-child2-no-subdomain.sub.https.html
@@ -11,7 +11,7 @@ import {
   insertIframe,
   testSameAgentCluster,
   testDifferentAgentClusters,
-  testOriginIsolationRestricted
+  testGetter
 } from "../resources/helpers.mjs";
 
 promise_setup(async () => {
@@ -32,7 +32,7 @@ testDifferentAgentClusters([self, 1], "Parent to child2");
 testSameAgentCluster([0, 1], "child1 to child2");
 testSameAgentCluster([1, 0], "child2 to child1");
 
-testOriginIsolationRestricted(self, true, "parent");
-testOriginIsolationRestricted(0, false, "child1");
-testOriginIsolationRestricted(1, false, "child2");
+testGetter(self, true, "parent");
+testGetter(0, false, "child1");
+testGetter(1, false, "child2");
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/2-iframes/parent-yes-child1-no-subdomain-child2-no-subdomain2.sub.https.html b/testing/web-platform/tests/origin-isolation/2-iframes/parent-yes-child1-no-subdomain-child2-no-subdomain2.sub.https.html
index 86c951dd8266..2d67979b68a3 100644
--- a/testing/web-platform/tests/origin-isolation/2-iframes/parent-yes-child1-no-subdomain-child2-no-subdomain2.sub.https.html
+++ b/testing/web-platform/tests/origin-isolation/2-iframes/parent-yes-child1-no-subdomain-child2-no-subdomain2.sub.https.html
@@ -11,7 +11,7 @@ import {
   insertIframe,
   testSameAgentCluster,
   testDifferentAgentClusters,
-  testOriginIsolationRestricted
+  testGetter
 } from "../resources/helpers.mjs";
 
 promise_setup(async () => {
@@ -32,7 +32,7 @@ testDifferentAgentClusters([self, 1], "Parent to child2");
 testSameAgentCluster([0, 1], "child1 to child2");
 testSameAgentCluster([1, 0], "child2 to child1");
 
-testOriginIsolationRestricted(self, true, "parent");
-testOriginIsolationRestricted(0, false, "child1");
-testOriginIsolationRestricted(1, false, "child2");
+testGetter(self, true, "parent");
+testGetter(0, false, "child1");
+testGetter(1, false, "child2");
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/2-iframes/parent-yes-child1-no-subdomain-child2-yes-subdomain.sub.https.html b/testing/web-platform/tests/origin-isolation/2-iframes/parent-yes-child1-no-subdomain-child2-yes-subdomain.sub.https.html
index 997fa0859f18..ecf759cde067 100644
--- a/testing/web-platform/tests/origin-isolation/2-iframes/parent-yes-child1-no-subdomain-child2-yes-subdomain.sub.https.html
+++ b/testing/web-platform/tests/origin-isolation/2-iframes/parent-yes-child1-no-subdomain-child2-yes-subdomain.sub.https.html
@@ -11,7 +11,7 @@ import {
   insertIframe,
   testSameAgentCluster,
   testDifferentAgentClusters,
-  testOriginIsolationRestricted
+  testGetter
 } from "../resources/helpers.mjs";
 
 promise_setup(async () => {
@@ -32,7 +32,7 @@ testDifferentAgentClusters([self, 1], "Parent to child2");
 testSameAgentCluster([0, 1], "child1 to child2");
 testSameAgentCluster([1, 0], "child2 to child1");
 
-testOriginIsolationRestricted(self, true, "parent");
-testOriginIsolationRestricted(0, false, "child1");
-testOriginIsolationRestricted(1, false, "child2");
+testGetter(self, true, "parent");
+testGetter(0, false, "child1");
+testGetter(1, false, "child2");
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/2-iframes/parent-yes-child1-no-subdomain-child2-yes-subdomain2.sub.https.html b/testing/web-platform/tests/origin-isolation/2-iframes/parent-yes-child1-no-subdomain-child2-yes-subdomain2.sub.https.html
index 7631bdd1bd4d..0448076178aa 100644
--- a/testing/web-platform/tests/origin-isolation/2-iframes/parent-yes-child1-no-subdomain-child2-yes-subdomain2.sub.https.html
+++ b/testing/web-platform/tests/origin-isolation/2-iframes/parent-yes-child1-no-subdomain-child2-yes-subdomain2.sub.https.html
@@ -10,7 +10,7 @@
 import {
   insertIframe,
   testDifferentAgentClusters,
-  testOriginIsolationRestricted
+  testGetter
 } from "../resources/helpers.mjs";
 
 promise_setup(async () => {
@@ -32,7 +32,7 @@ testDifferentAgentClusters([self, 1], "Parent to child2");
 testDifferentAgentClusters([0, 1], "child1 to child2");
 testDifferentAgentClusters([1, 0], "child2 to child1");
 
-testOriginIsolationRestricted(self, true, "parent");
-testOriginIsolationRestricted(0, false, "child1");
-testOriginIsolationRestricted(1, true, "child2");
+testGetter(self, true, "parent");
+testGetter(0, false, "child1");
+testGetter(1, true, "child2");
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/2-iframes/parent-yes-child1-yes-subdomain-child2-no-port.sub.https.html b/testing/web-platform/tests/origin-isolation/2-iframes/parent-yes-child1-yes-subdomain-child2-no-port.sub.https.html
index edcdcbabd76b..fcdb13699710 100644
--- a/testing/web-platform/tests/origin-isolation/2-iframes/parent-yes-child1-yes-subdomain-child2-no-port.sub.https.html
+++ b/testing/web-platform/tests/origin-isolation/2-iframes/parent-yes-child1-yes-subdomain-child2-no-port.sub.https.html
@@ -10,7 +10,7 @@
 import {
   insertIframe,
   testDifferentAgentClusters,
-  testOriginIsolationRestricted
+  testGetter
 } from "../resources/helpers.mjs";
 
 promise_setup(async () => {
@@ -30,7 +30,7 @@ testDifferentAgentClusters([self, 1], "Parent to child2");
 testDifferentAgentClusters([0, 1], "child1 to child2");
 testDifferentAgentClusters([1, 0], "child2 to child1");
 
-testOriginIsolationRestricted(self, true, "parent");
-testOriginIsolationRestricted(0, true, "child1");
-testOriginIsolationRestricted(1, false, "child2");
+testGetter(self, true, "parent");
+testGetter(0, true, "child1");
+testGetter(1, false, "child2");
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/2-iframes/parent-yes-child1-yes-subdomain-child2-no-subdomain.sub.https.html b/testing/web-platform/tests/origin-isolation/2-iframes/parent-yes-child1-yes-subdomain-child2-no-subdomain.sub.https.html
index f8503312460b..011bcd1637b8 100644
--- a/testing/web-platform/tests/origin-isolation/2-iframes/parent-yes-child1-yes-subdomain-child2-no-subdomain.sub.https.html
+++ b/testing/web-platform/tests/origin-isolation/2-iframes/parent-yes-child1-yes-subdomain-child2-no-subdomain.sub.https.html
@@ -11,7 +11,7 @@ import {
   insertIframe,
   testSameAgentCluster,
   testDifferentAgentClusters,
-  testOriginIsolationRestricted
+  testGetter
 } from "../resources/helpers.mjs";
 
 promise_setup(async () => {
@@ -32,7 +32,7 @@ testDifferentAgentClusters([self, 1], "Parent to child2");
 testSameAgentCluster([0, 1], "child1 to child2");
 testSameAgentCluster([1, 0], "child2 to child1");
 
-testOriginIsolationRestricted(self, true, "parent");
-testOriginIsolationRestricted(0, true, "child1");
-testOriginIsolationRestricted(1, true, "child2");
+testGetter(self, true, "parent");
+testGetter(0, true, "child1");
+testGetter(1, true, "child2");
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/2-iframes/parent-yes-child1-yes-subdomain-child2-yes-subdomain.sub.https.html b/testing/web-platform/tests/origin-isolation/2-iframes/parent-yes-child1-yes-subdomain-child2-yes-subdomain.sub.https.html
index 6ae6fac77181..1a4dd4c9a655 100644
--- a/testing/web-platform/tests/origin-isolation/2-iframes/parent-yes-child1-yes-subdomain-child2-yes-subdomain.sub.https.html
+++ b/testing/web-platform/tests/origin-isolation/2-iframes/parent-yes-child1-yes-subdomain-child2-yes-subdomain.sub.https.html
@@ -11,7 +11,7 @@ import {
   insertIframe,
   testSameAgentCluster,
   testDifferentAgentClusters,
-  testOriginIsolationRestricted
+  testGetter
 } from "../resources/helpers.mjs";
 
 promise_setup(async () => {
@@ -33,7 +33,7 @@ testDifferentAgentClusters([self, 1], "Parent to child2");
 testSameAgentCluster([0, 1], "child1 to child2");
 testSameAgentCluster([1, 0], "child2 to child1");
 
-testOriginIsolationRestricted(self, true, "parent");
-testOriginIsolationRestricted(0, true, "child1");
-testOriginIsolationRestricted(1, true, "child2");
+testGetter(self, true, "parent");
+testGetter(0, true, "child1");
+testGetter(1, true, "child2");
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/2-iframes/parent-yes-child1-yes-subdomain-child2-yes-subdomain2.sub.https.html b/testing/web-platform/tests/origin-isolation/2-iframes/parent-yes-child1-yes-subdomain-child2-yes-subdomain2.sub.https.html
index 53eaea13ca24..852fd2d216e3 100644
--- a/testing/web-platform/tests/origin-isolation/2-iframes/parent-yes-child1-yes-subdomain-child2-yes-subdomain2.sub.https.html
+++ b/testing/web-platform/tests/origin-isolation/2-iframes/parent-yes-child1-yes-subdomain-child2-yes-subdomain2.sub.https.html
@@ -10,7 +10,7 @@
 import {
   insertIframe,
   testDifferentAgentClusters,
-  testOriginIsolationRestricted
+  testGetter
 } from "../resources/helpers.mjs";
 
 promise_setup(async () => {
@@ -32,7 +32,7 @@ testDifferentAgentClusters([self, 1], "Parent to child2");
 testDifferentAgentClusters([0, 1], "child1 to child2");
 testDifferentAgentClusters([1, 0], "child2 to child1");
 
-testOriginIsolationRestricted(self, true, "parent");
-testOriginIsolationRestricted(0, true, "child1");
-testOriginIsolationRestricted(1, true, "child2");
+testGetter(self, true, "parent");
+testGetter(0, true, "child1");
+testGetter(1, true, "child2");
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/about-blank.https.sub.html b/testing/web-platform/tests/origin-isolation/about-blank.https.sub.html
index 6af31dd021f9..945243dd7efc 100644
--- a/testing/web-platform/tests/origin-isolation/about-blank.https.sub.html
+++ b/testing/web-platform/tests/origin-isolation/about-blank.https.sub.html
@@ -12,7 +12,7 @@ import {
   setBothDocumentDomains,
   testSameAgentCluster,
   testDifferentAgentClusters,
-  testOriginIsolationRestricted
+  testGetter
 } from "./resources/helpers.mjs";
 
 promise_setup(async () => {
@@ -26,9 +26,9 @@ testSameAgentCluster([self, 0], "parent to about:blank");
 testDifferentAgentClusters([0, 1], "about:blank to child2");
 testDifferentAgentClusters([1, 0], "child2 to about:blank");
 
-testOriginIsolationRestricted(self, true, "parent");
-testOriginIsolationRestricted(0, true, "about:blank");
-testOriginIsolationRestricted(1, false, "child2");
+testGetter(self, true, "parent");
+testGetter(0, true, "about:blank");
+testGetter(1, false, "child2");
 
 async function insertAboutBlankIframe() {
   const iframe = document.createElement("iframe");
diff --git a/testing/web-platform/tests/origin-isolation/getter-special-cases/csp-sandbox-no.https.html b/testing/web-platform/tests/origin-isolation/getter-special-cases/csp-sandbox-no.https.html
index 22cdffc72710..16ecb4519295 100644
--- a/testing/web-platform/tests/origin-isolation/getter-special-cases/csp-sandbox-no.https.html
+++ b/testing/web-platform/tests/origin-isolation/getter-special-cases/csp-sandbox-no.https.html
@@ -1,15 +1,15 @@
 <!DOCTYPE html>
 <meta charset="utf-8">
-<title>window.originIsolationRestricted for a top-level frame sandboxed by CSP with no Origin-Isolation header</title>
+<title>window.originIsolated for a top-level frame sandboxed by CSP with no Origin-Isolation header</title>
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 
 <div id="log"></div>
 
 <script type="module">
-import { testOriginIsolationRestricted } from "../resources/helpers.mjs";
+import { testGetter } from "../resources/helpers.mjs";
 
 // Even without the header, sandboxing makes this page have an opaque origin,
 // so it is origin-isolated.
-testOriginIsolationRestricted(self, true);
+testGetter(self, true);
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/getter-special-cases/csp-sandbox-yes.https.html b/testing/web-platform/tests/origin-isolation/getter-special-cases/csp-sandbox-yes.https.html
index 1f3406a8b6bf..b9a7359974d5 100644
--- a/testing/web-platform/tests/origin-isolation/getter-special-cases/csp-sandbox-yes.https.html
+++ b/testing/web-platform/tests/origin-isolation/getter-special-cases/csp-sandbox-yes.https.html
@@ -1,15 +1,15 @@
 <!DOCTYPE html>
 <meta charset="utf-8">
-<title>window.originIsolationRestricted for a top-level frame sandboxed by CSP with an Origin-Isolation header</title>
+<title>window.originIsolated for a top-level frame sandboxed by CSP with an Origin-Isolation header</title>
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 
 <div id="log"></div>
 
 <script type="module">
-import { testOriginIsolationRestricted } from "../resources/helpers.mjs";
+import { testGetter } from "../resources/helpers.mjs";
 
 // We're definitely origin-isolated: both the CSP sandboxing and the
 // Origin-Isolation header should ensure this.
-testOriginIsolationRestricted(self, true);
+testGetter(self, true);
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/getter-special-cases/data-to-javascript-no.https.html b/testing/web-platform/tests/origin-isolation/getter-special-cases/data-to-javascript-no.https.html
index 1155c09ff362..cb00ef782d0c 100644
--- a/testing/web-platform/tests/origin-isolation/getter-special-cases/data-to-javascript-no.https.html
+++ b/testing/web-platform/tests/origin-isolation/getter-special-cases/data-to-javascript-no.https.html
@@ -1,6 +1,6 @@
 <!DOCTYPE html>
 <meta charset="utf-8">
-<title>window.originIsolationRestricted for a javascript: URL navigated to from a data: URL on a non-isolated page</title>
+<title>window.originIsolated for a javascript: URL navigated to from a data: URL on a non-isolated page</title>
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 
diff --git a/testing/web-platform/tests/origin-isolation/getter-special-cases/data-to-javascript-yes.https.html b/testing/web-platform/tests/origin-isolation/getter-special-cases/data-to-javascript-yes.https.html
index a6414ae89111..6856441deff1 100644
--- a/testing/web-platform/tests/origin-isolation/getter-special-cases/data-to-javascript-yes.https.html
+++ b/testing/web-platform/tests/origin-isolation/getter-special-cases/data-to-javascript-yes.https.html
@@ -1,6 +1,6 @@
 <!DOCTYPE html>
 <meta charset="utf-8">
-<title>window.originIsolationRestricted for a javascript: URL navigated to from a data: URL on an isolated page</title>
+<title>window.originIsolated for a javascript: URL navigated to from a data: URL on an isolated page</title>
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 
diff --git a/testing/web-platform/tests/origin-isolation/getter-special-cases/data-url-no.https.html b/testing/web-platform/tests/origin-isolation/getter-special-cases/data-url-no.https.html
index dd371b811391..5b194eaef355 100644
--- a/testing/web-platform/tests/origin-isolation/getter-special-cases/data-url-no.https.html
+++ b/testing/web-platform/tests/origin-isolation/getter-special-cases/data-url-no.https.html
@@ -1,6 +1,6 @@
 <!DOCTYPE html>
 <meta charset="utf-8">
-<title>window.originIsolationRestricted for a data: URL on a non-isolated page</title>
+<title>window.originIsolated for a data: URL on a non-isolated page</title>
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 
diff --git a/testing/web-platform/tests/origin-isolation/getter-special-cases/javascript-url-no.https.html b/testing/web-platform/tests/origin-isolation/getter-special-cases/javascript-url-no.https.html
index 71b2758e6f6a..b75cae47cdbb 100644
--- a/testing/web-platform/tests/origin-isolation/getter-special-cases/javascript-url-no.https.html
+++ b/testing/web-platform/tests/origin-isolation/getter-special-cases/javascript-url-no.https.html
@@ -1,6 +1,6 @@
 <!DOCTYPE html>
 <meta charset="utf-8">
-<title>window.originIsolationRestricted for a javascript: URL on a non-isolated page</title>
+<title>window.originIsolated for a javascript: URL on a non-isolated page</title>
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 
diff --git a/testing/web-platform/tests/origin-isolation/getter-special-cases/javascript-url-yes.https.html b/testing/web-platform/tests/origin-isolation/getter-special-cases/javascript-url-yes.https.html
index 97b91c4cddaa..573b1a0b712b 100644
--- a/testing/web-platform/tests/origin-isolation/getter-special-cases/javascript-url-yes.https.html
+++ b/testing/web-platform/tests/origin-isolation/getter-special-cases/javascript-url-yes.https.html
@@ -1,6 +1,6 @@
 <!DOCTYPE html>
 <meta charset="utf-8">
-<title>window.originIsolationRestricted for a javascript: URL on an isolated page</title>
+<title>window.originIsolated for a javascript: URL on an isolated page</title>
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 
diff --git a/testing/web-platform/tests/origin-isolation/getter-special-cases/removed-iframe.sub.https.html b/testing/web-platform/tests/origin-isolation/getter-special-cases/removed-iframe.sub.https.html
index fd838cdbb55b..d7ad4903ab9b 100644
--- a/testing/web-platform/tests/origin-isolation/getter-special-cases/removed-iframe.sub.https.html
+++ b/testing/web-platform/tests/origin-isolation/getter-special-cases/removed-iframe.sub.https.html
@@ -1,13 +1,9 @@
 <!DOCTYPE html>
 <meta charset="utf-8">
-<title>window.originIsolationRestricted for a removed frame</title>
+<title>window.originIsolated for a removed frame</title>
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 
-<!-- TODO(domenic): update this to test window.originIsolated, not
-     window.originIsolationRestricted. See
-     https://github.com/WICG/origin-isolation/pull/34. -->
-
 <div id="log"></div>
 
 <script type="module">
@@ -24,8 +20,8 @@ promise_test(async () => {
 
   const frameWindow = iframe.contentWindow;
 
-  assert_equals(frameWindow.originIsolationRestricted, true, "before");
+  assert_equals(frameWindow.originIsolated, true, "before");
   iframe.remove();
-  assert_equals(frameWindow.originIsolationRestricted, true, "after");
-}, "Removing the iframe does not change originIsolationRestricted");
+  assert_equals(frameWindow.originIsolated, true, "after");
+}, "Removing the iframe does not change originIsolated");
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/getter-special-cases/resources/data-to-javascript-test.mjs b/testing/web-platform/tests/origin-isolation/getter-special-cases/resources/data-to-javascript-test.mjs
index e5f21ee298e8..3a88253ee305 100644
--- a/testing/web-platform/tests/origin-isolation/getter-special-cases/resources/data-to-javascript-test.mjs
+++ b/testing/web-platform/tests/origin-isolation/getter-special-cases/resources/data-to-javascript-test.mjs
@@ -1,5 +1,5 @@
 import { insertCustomIframe, testSupportScript } from "./helpers.mjs";
-import { waitForIframe, testOriginIsolationRestricted } from "../../resources/helpers.mjs";
+import { waitForIframe, testGetter } from "../../resources/helpers.mjs";
 
 const testSupportScriptSuitableForNesting =
   testSupportScript.replace('</script>', '</scri` + `pt>');
@@ -29,5 +29,5 @@ export default () => {
   // The javascript: URL iframe inherits its origin from the previous occupant
   // of the iframe, which is a data: URL, so it should always be true.
 
-  testOriginIsolationRestricted(0, true);
+  testGetter(0, true);
 };
diff --git a/testing/web-platform/tests/origin-isolation/getter-special-cases/resources/data-url-test.mjs b/testing/web-platform/tests/origin-isolation/getter-special-cases/resources/data-url-test.mjs
index 1b241ca1074a..d32d8521be47 100644
--- a/testing/web-platform/tests/origin-isolation/getter-special-cases/resources/data-url-test.mjs
+++ b/testing/web-platform/tests/origin-isolation/getter-special-cases/resources/data-url-test.mjs
@@ -1,5 +1,5 @@
 import { insertCustomIframe, testSupportScript } from "./helpers.mjs";
-import { testOriginIsolationRestricted } from "../../resources/helpers.mjs";
+import { testGetter } from "../../resources/helpers.mjs";
 
 export default () => {
   promise_setup(() => {
@@ -9,5 +9,5 @@ export default () => {
   // The data: URL iframe has an opaque origin, so it should return true, since
   // for them site === origin so they are always "origin-isolated".
 
-  testOriginIsolationRestricted(0, true, "data: URL child");
+  testGetter(0, true, "data: URL child");
 };
diff --git a/testing/web-platform/tests/origin-isolation/getter-special-cases/resources/helpers.mjs b/testing/web-platform/tests/origin-isolation/getter-special-cases/resources/helpers.mjs
index 0c91ee74b14d..d1e3cc17a13e 100644
--- a/testing/web-platform/tests/origin-isolation/getter-special-cases/resources/helpers.mjs
+++ b/testing/web-platform/tests/origin-isolation/getter-special-cases/resources/helpers.mjs
@@ -18,12 +18,12 @@ export async function insertCustomIframe(src) {
 
 /**
  * This is the part of send-origin-isolation-header.py that allows
- * us to reuse testOriginIsolationRestricted.
+ * us to reuse testGetter.
  */
 export const testSupportScript = `
   <script>
   window.onmessage = () => {
-    parent.postMessage(self.originIsolationRestricted, "*");
+    parent.postMessage(self.originIsolated, "*");
   };
   </script>
 `;
diff --git a/testing/web-platform/tests/origin-isolation/getter-special-cases/resources/javascript-url-test.mjs b/testing/web-platform/tests/origin-isolation/getter-special-cases/resources/javascript-url-test.mjs
index 66d0f0dcf194..de474d8cafca 100644
--- a/testing/web-platform/tests/origin-isolation/getter-special-cases/resources/javascript-url-test.mjs
+++ b/testing/web-platform/tests/origin-isolation/getter-special-cases/resources/javascript-url-test.mjs
@@ -1,5 +1,5 @@
 import { insertCustomIframe, testSupportScript } from "./helpers.mjs";
-import { testOriginIsolationRestricted } from "../../resources/helpers.mjs";
+import { testGetter } from "../../resources/helpers.mjs";
 
 export default ({ expected }) => {
   promise_setup(() => {
@@ -10,5 +10,5 @@ export default ({ expected }) => {
   // of the iframe, which is about:blank, which in turn inherits from the
   // parent. So, the caller needs to tell us what to expect.
 
-  testOriginIsolationRestricted(0, expected);
+  testGetter(0, expected);
 };
diff --git a/testing/web-platform/tests/origin-isolation/getter-special-cases/resources/sandboxed-iframe-test.sub.mjs b/testing/web-platform/tests/origin-isolation/getter-special-cases/resources/sandboxed-iframe-test.sub.mjs
index af5a6ebc6c05..98575b8d80ec 100644
--- a/testing/web-platform/tests/origin-isolation/getter-special-cases/resources/sandboxed-iframe-test.sub.mjs
+++ b/testing/web-platform/tests/origin-isolation/getter-special-cases/resources/sandboxed-iframe-test.sub.mjs
@@ -1,6 +1,6 @@
 import {
   navigateIframe,
-  testOriginIsolationRestricted
+  testGetter
 } from "../../resources/helpers.mjs";
 
 export default () => {
@@ -16,5 +16,5 @@ export default () => {
 
   // Sandboxed iframes have an opaque origin, so it should return true, since
   // for them site === origin so they are always "origin-isolated".
-  testOriginIsolationRestricted(0, true);
+  testGetter(0, true);
 };
diff --git a/testing/web-platform/tests/origin-isolation/getter-special-cases/resources/sandboxed-same-origin-iframe-test.sub.mjs b/testing/web-platform/tests/origin-isolation/getter-special-cases/resources/sandboxed-same-origin-iframe-test.sub.mjs
index 931e798af44a..272f805870c9 100644
--- a/testing/web-platform/tests/origin-isolation/getter-special-cases/resources/sandboxed-same-origin-iframe-test.sub.mjs
+++ b/testing/web-platform/tests/origin-isolation/getter-special-cases/resources/sandboxed-same-origin-iframe-test.sub.mjs
@@ -1,6 +1,6 @@
 import {
   navigateIframe,
-  testOriginIsolationRestricted
+  testGetter
 } from "../../resources/helpers.mjs";
 
 export default ({ expected }) => {
@@ -16,5 +16,5 @@ export default ({ expected }) => {
 
   // Since the allow-same-origin token is set, this should behave like a normal
   // iframe, and follow the embedder.
-  testOriginIsolationRestricted(0, expected);
+  testGetter(0, expected);
 };
diff --git a/testing/web-platform/tests/origin-isolation/getter-special-cases/sandboxed-iframe-no.https.html b/testing/web-platform/tests/origin-isolation/getter-special-cases/sandboxed-iframe-no.https.html
index 301e24484551..bc2276fede8a 100644
--- a/testing/web-platform/tests/origin-isolation/getter-special-cases/sandboxed-iframe-no.https.html
+++ b/testing/web-platform/tests/origin-isolation/getter-special-cases/sandboxed-iframe-no.https.html
@@ -1,6 +1,6 @@
 <!DOCTYPE html>
 <meta charset="utf-8">
-<title>window.originIsolationRestricted for a sandboxed iframe on a non-isolated page</title>
+<title>window.originIsolated for a sandboxed iframe on a non-isolated page</title>
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 
diff --git a/testing/web-platform/tests/origin-isolation/getter-special-cases/sandboxed-iframe-yes.https.html b/testing/web-platform/tests/origin-isolation/getter-special-cases/sandboxed-iframe-yes.https.html
index ab394083fd5d..5805d3421ebe 100644
--- a/testing/web-platform/tests/origin-isolation/getter-special-cases/sandboxed-iframe-yes.https.html
+++ b/testing/web-platform/tests/origin-isolation/getter-special-cases/sandboxed-iframe-yes.https.html
@@ -1,6 +1,6 @@
 <!DOCTYPE html>
 <meta charset="utf-8">
-<title>window.originIsolationRestricted for a sandboxed iframe on an isolated page</title>
+<title>window.originIsolated for a sandboxed iframe on an isolated page</title>
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 
diff --git a/testing/web-platform/tests/origin-isolation/getter-special-cases/sandboxed-same-origin-iframe-no.https.html b/testing/web-platform/tests/origin-isolation/getter-special-cases/sandboxed-same-origin-iframe-no.https.html
index 6e500d8936dc..a1b44a1e5b34 100644
--- a/testing/web-platform/tests/origin-isolation/getter-special-cases/sandboxed-same-origin-iframe-no.https.html
+++ b/testing/web-platform/tests/origin-isolation/getter-special-cases/sandboxed-same-origin-iframe-no.https.html
@@ -1,6 +1,6 @@
 <!DOCTYPE html>
 <meta charset="utf-8">
-<title>window.originIsolationRestricted for a sandboxed, but same-origin, iframe on a non-isolated page</title>
+<title>window.originIsolated for a sandboxed, but same-origin, iframe on a non-isolated page</title>
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 
diff --git a/testing/web-platform/tests/origin-isolation/getter-special-cases/sandboxed-same-origin-iframe-yes.https.html b/testing/web-platform/tests/origin-isolation/getter-special-cases/sandboxed-same-origin-iframe-yes.https.html
index a6ff0a004241..b9339afae2e8 100644
--- a/testing/web-platform/tests/origin-isolation/getter-special-cases/sandboxed-same-origin-iframe-yes.https.html
+++ b/testing/web-platform/tests/origin-isolation/getter-special-cases/sandboxed-same-origin-iframe-yes.https.html
@@ -1,6 +1,6 @@
 <!DOCTYPE html>
 <meta charset="utf-8">
-<title>window.originIsolationRestricted for a sandboxed, but same-origin, iframe on an isolated page</title>
+<title>window.originIsolated for a sandboxed, but same-origin, iframe on an isolated page</title>
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 
diff --git a/testing/web-platform/tests/origin-isolation/iframe-navigation/parent-no-1-no-same-2-yes-port.sub.https.html b/testing/web-platform/tests/origin-isolation/iframe-navigation/parent-no-1-no-same-2-yes-port.sub.https.html
index ff9ea4dca8c3..85ee2f677f31 100644
--- a/testing/web-platform/tests/origin-isolation/iframe-navigation/parent-no-1-no-same-2-yes-port.sub.https.html
+++ b/testing/web-platform/tests/origin-isolation/iframe-navigation/parent-no-1-no-same-2-yes-port.sub.https.html
@@ -13,7 +13,7 @@ import {
   setBothDocumentDomains,
   testSameAgentCluster,
   testDifferentAgentClusters,
-  testOriginIsolationRestricted
+  testGetter
 } from "../resources/helpers.mjs";
 
 let frame1;
@@ -24,8 +24,8 @@ promise_setup(async () => {
 // Nobody requested isolation yet.
 
 testSameAgentCluster([self, 0], "Before: parent to child");
-testOriginIsolationRestricted(self, false, "before parent");
-testOriginIsolationRestricted(0, false, "before child");
+testGetter(self, false, "before parent");
+testGetter(0, false, "before child");
 
 promise_test(async () => {
   await navigateIframe(frame1, "{{hosts[][]}}:{{ports[https][1]}}", "?1");
@@ -35,6 +35,6 @@ promise_test(async () => {
 // Since the new page is different-origin, it should be isolated.
 
 testDifferentAgentClusters([self, 0], "After: parent to child");
-testOriginIsolationRestricted(self, false, "after parent");
-testOriginIsolationRestricted(0, true, "after child");
+testGetter(self, false, "after parent");
+testGetter(0, true, "after child");
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/iframe-navigation/parent-no-1-no-same-2-yes-subdomain.sub.https.html b/testing/web-platform/tests/origin-isolation/iframe-navigation/parent-no-1-no-same-2-yes-subdomain.sub.https.html
index f599cb986d93..bb39de648acf 100644
--- a/testing/web-platform/tests/origin-isolation/iframe-navigation/parent-no-1-no-same-2-yes-subdomain.sub.https.html
+++ b/testing/web-platform/tests/origin-isolation/iframe-navigation/parent-no-1-no-same-2-yes-subdomain.sub.https.html
@@ -13,7 +13,7 @@ import {
   setBothDocumentDomains,
   testSameAgentCluster,
   testDifferentAgentClusters,
-  testOriginIsolationRestricted
+  testGetter
 } from "../resources/helpers.mjs";
 
 let frame1;
@@ -24,8 +24,8 @@ promise_setup(async () => {
 // Nobody requested isolation yet.
 
 testSameAgentCluster([self, 0], "Before: parent to child");
-testOriginIsolationRestricted(self, false, "before parent");
-testOriginIsolationRestricted(0, false, "before child");
+testGetter(self, false, "before parent");
+testGetter(0, false, "before child");
 
 promise_test(async () => {
   await navigateIframe(frame1, "{{hosts[][www]}}", "?1");
@@ -35,6 +35,6 @@ promise_test(async () => {
 // Since the new page is different-origin, it should be isolated.
 
 testDifferentAgentClusters([self, 0], "After: parent to child");
-testOriginIsolationRestricted(self, false, "after parent");
-testOriginIsolationRestricted(0, true, "after child");
+testGetter(self, false, "after parent");
+testGetter(0, true, "after child");
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/iframe-navigation/parent-no-1-no-subdomain-2-yes-subdomain.sub.https.html b/testing/web-platform/tests/origin-isolation/iframe-navigation/parent-no-1-no-subdomain-2-yes-subdomain.sub.https.html
index 8777b656e335..b52ca783f6f7 100644
--- a/testing/web-platform/tests/origin-isolation/iframe-navigation/parent-no-1-no-subdomain-2-yes-subdomain.sub.https.html
+++ b/testing/web-platform/tests/origin-isolation/iframe-navigation/parent-no-1-no-subdomain-2-yes-subdomain.sub.https.html
@@ -12,7 +12,7 @@ import {
   navigateIframe,
   setBothDocumentDomains,
   testSameAgentCluster,
-  testOriginIsolationRestricted
+  testGetter
 } from "../resources/helpers.mjs";
 
 let frame1;
@@ -23,8 +23,8 @@ promise_setup(async () => {
 // Nobody requested isolation yet.
 
 testSameAgentCluster([self, 0], "Before: parent to child");
-testOriginIsolationRestricted(self, false, "before parent");
-testOriginIsolationRestricted(0, false, "before child");
+testGetter(self, false, "before parent");
+testGetter(0, false, "before child");
 
 promise_test(async () => {
   await navigateIframe(frame1, "{{hosts[][www]}}", "?1");
@@ -35,6 +35,6 @@ promise_test(async () => {
 // isolation request is ignored; instead we continue isolating.
 
 testSameAgentCluster([self, 0], "After: parent to child");
-testOriginIsolationRestricted(self, false, "after parent");
-testOriginIsolationRestricted(0, false, "after child");
+testGetter(self, false, "after parent");
+testGetter(0, false, "after child");
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/iframe-navigation/parent-no-1-no-subdomain-2-yes-subdomain2.sub.https.html b/testing/web-platform/tests/origin-isolation/iframe-navigation/parent-no-1-no-subdomain-2-yes-subdomain2.sub.https.html
index 22f35eb9149c..67e99cee090a 100644
--- a/testing/web-platform/tests/origin-isolation/iframe-navigation/parent-no-1-no-subdomain-2-yes-subdomain2.sub.https.html
+++ b/testing/web-platform/tests/origin-isolation/iframe-navigation/parent-no-1-no-subdomain-2-yes-subdomain2.sub.https.html
@@ -13,7 +13,7 @@ import {
   setBothDocumentDomains,
   testSameAgentCluster,
   testDifferentAgentClusters,
-  testOriginIsolationRestricted
+  testGetter
 } from "../resources/helpers.mjs";
 
 let frame1;
@@ -24,8 +24,8 @@ promise_setup(async () => {
 // Nobody requested isolation yet.
 
 testSameAgentCluster([self, 0], "Before: parent to child");
-testOriginIsolationRestricted(self, false, "before parent");
-testOriginIsolationRestricted(0, false, "before child");
+testGetter(self, false, "before parent");
+testGetter(0, false, "before child");
 
 promise_test(async () => {
   await navigateIframe(frame1, "{{hosts[][www1]}}", "?1");
@@ -36,6 +36,6 @@ promise_test(async () => {
 // isolation request is respected.
 
 testDifferentAgentClusters([self, 0], "After: parent to child");
-testOriginIsolationRestricted(self, false, "after parent");
-testOriginIsolationRestricted(0, true, "after child");
+testGetter(self, false, "after parent");
+testGetter(0, true, "after child");
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/iframe-navigation/parent-no-1-subdomain-yes-2-subdomain2-no.sub.https.html b/testing/web-platform/tests/origin-isolation/iframe-navigation/parent-no-1-subdomain-yes-2-subdomain2-no.sub.https.html
index ac51e6ef80c9..1b7dd01947f6 100644
--- a/testing/web-platform/tests/origin-isolation/iframe-navigation/parent-no-1-subdomain-yes-2-subdomain2-no.sub.https.html
+++ b/testing/web-platform/tests/origin-isolation/iframe-navigation/parent-no-1-subdomain-yes-2-subdomain2-no.sub.https.html
@@ -13,7 +13,7 @@ import {
   setBothDocumentDomains,
   testSameAgentCluster,
   testDifferentAgentClusters,
-  testOriginIsolationRestricted
+  testGetter
 } from "../resources/helpers.mjs";
 
 let frame1;
@@ -24,8 +24,8 @@ promise_setup(async () => {
 // Since they are different-origin, the child's isolation request is respected.
 
 testDifferentAgentClusters([self, 0], "Before: parent to child");
-testOriginIsolationRestricted(self, false, "before parent");
-testOriginIsolationRestricted(0, true, "before child");
+testGetter(self, false, "before parent");
+testGetter(0, true, "before child");
 
 promise_test(async () => {
   await navigateIframe(frame1, "{{hosts[][www1]}}");
@@ -36,6 +36,6 @@ promise_test(async () => {
 // doesn't somehow get isolated just because its predecessor was.
 
 testSameAgentCluster([self, 0], "After: parent to child");
-testOriginIsolationRestricted(self, false, "after parent");
-testOriginIsolationRestricted(0, false, "after child");
+testGetter(self, false, "after parent");
+testGetter(0, false, "after child");
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/iframe-navigation/parent-no-1-yes-subdomain-2-no-subdomain.sub.https.html b/testing/web-platform/tests/origin-isolation/iframe-navigation/parent-no-1-yes-subdomain-2-no-subdomain.sub.https.html
index 425983423ba7..783f5870a839 100644
--- a/testing/web-platform/tests/origin-isolation/iframe-navigation/parent-no-1-yes-subdomain-2-no-subdomain.sub.https.html
+++ b/testing/web-platform/tests/origin-isolation/iframe-navigation/parent-no-1-yes-subdomain-2-no-subdomain.sub.https.html
@@ -12,7 +12,7 @@ import {
   navigateIframe,
   setBothDocumentDomains,
   testDifferentAgentClusters,
-  testOriginIsolationRestricted
+  testGetter
 } from "../resources/helpers.mjs";
 
 let frame1;
@@ -23,8 +23,8 @@ promise_setup(async () => {
 // Since they are different-origin, the child's isolation request is respected.
 
 testDifferentAgentClusters([self, 0], "Before: parent to child");
-testOriginIsolationRestricted(self, false, "before parent");
-testOriginIsolationRestricted(0, true, "before child");
+testGetter(self, false, "before parent");
+testGetter(0, true, "before child");
 
 promise_test(async () => {
   await navigateIframe(frame1, "{{hosts[][www]}}");
@@ -35,6 +35,6 @@ promise_test(async () => {
 // non-isolation request is ignored; instead we continue isolating.
 
 testDifferentAgentClusters([self, 0], "After: parent to child");
-testOriginIsolationRestricted(self, false, "after parent");
-testOriginIsolationRestricted(0, true, "after child");
+testGetter(self, false, "after parent");
+testGetter(0, true, "after child");
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/iframe-navigation/parent-yes-1-no-same-2-no-port.sub.https.html b/testing/web-platform/tests/origin-isolation/iframe-navigation/parent-yes-1-no-same-2-no-port.sub.https.html
index 2d9c9ac98d02..461fd0ddc4b8 100644
--- a/testing/web-platform/tests/origin-isolation/iframe-navigation/parent-yes-1-no-same-2-no-port.sub.https.html
+++ b/testing/web-platform/tests/origin-isolation/iframe-navigation/parent-yes-1-no-same-2-no-port.sub.https.html
@@ -13,7 +13,7 @@ import {
   setBothDocumentDomains,
   testSameAgentCluster,
   testDifferentAgentClusters,
-  testOriginIsolationRestricted
+  testGetter
 } from "../resources/helpers.mjs";
 
 let frame1;
@@ -25,8 +25,8 @@ promise_setup(async () => {
 // so it gets isolated too.
 
 testSameAgentCluster([self, 0], "Before: parent to child");
-testOriginIsolationRestricted(self, true, "before parent");
-testOriginIsolationRestricted(0, true, "before child");
+testGetter(self, true, "before parent");
+testGetter(0, true, "before child");
 
 promise_test(async () => {
   await navigateIframe(frame1, "{{hosts[][]}}:{{ports[https][1]}}");
@@ -36,6 +36,6 @@ promise_test(async () => {
 // Since the new page is different-origin, its non-request should be respected.
 
 testDifferentAgentClusters([self, 0], "After: parent to child");
-testOriginIsolationRestricted(self, true, "after parent");
-testOriginIsolationRestricted(0, false, "after child");
+testGetter(self, true, "after parent");
+testGetter(0, false, "after child");
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/iframe-navigation/parent-yes-1-no-same-2-no-subdomain.sub.https.html b/testing/web-platform/tests/origin-isolation/iframe-navigation/parent-yes-1-no-same-2-no-subdomain.sub.https.html
index abf0da2b5d60..6832cd03858c 100644
--- a/testing/web-platform/tests/origin-isolation/iframe-navigation/parent-yes-1-no-same-2-no-subdomain.sub.https.html
+++ b/testing/web-platform/tests/origin-isolation/iframe-navigation/parent-yes-1-no-same-2-no-subdomain.sub.https.html
@@ -13,7 +13,7 @@ import {
   setBothDocumentDomains,
   testSameAgentCluster,
   testDifferentAgentClusters,
-  testOriginIsolationRestricted
+  testGetter
 } from "../resources/helpers.mjs";
 
 let frame1;
@@ -25,8 +25,8 @@ promise_setup(async () => {
 // so it gets isolated too.
 
 testSameAgentCluster([self, 0], "Before: parent to child");
-testOriginIsolationRestricted(self, true, "before parent");
-testOriginIsolationRestricted(0, true, "before child");
+testGetter(self, true, "before parent");
+testGetter(0, true, "before child");
 
 promise_test(async () => {
   await navigateIframe(frame1, "{{hosts[][www]}}");
@@ -36,6 +36,6 @@ promise_test(async () => {
 // Since the new page is different-origin, its non-request should be respected.
 
 testDifferentAgentClusters([self, 0], "After: parent to child");
-testOriginIsolationRestricted(self, true, "after parent");
-testOriginIsolationRestricted(0, false, "after child");
+testGetter(self, true, "after parent");
+testGetter(0, false, "after child");
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/insecure-http.sub.html b/testing/web-platform/tests/origin-isolation/insecure-http.sub.html
index 583ca2f441b1..18e0216e2627 100644
--- a/testing/web-platform/tests/origin-isolation/insecure-http.sub.html
+++ b/testing/web-platform/tests/origin-isolation/insecure-http.sub.html
@@ -10,7 +10,7 @@
 import {
   insertIframe,
   testSameAgentCluster,
-  testOriginIsolationRestricted
+  testGetter
 } from "./resources/helpers.mjs";
 
 promise_setup(async () => {
@@ -21,6 +21,6 @@ promise_setup(async () => {
 // So both end up in the site-keyed agent cluster.
 testSameAgentCluster([self, 0]);
 
-testOriginIsolationRestricted(self, false, "parent");
-testOriginIsolationRestricted(0, false, "child");
+testGetter(self, false, "parent");
+testGetter(0, false, "child");
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/removing-iframes.sub.https.html b/testing/web-platform/tests/origin-isolation/removing-iframes.sub.https.html
index 3a6d91c447a9..cbe13af82079 100644
--- a/testing/web-platform/tests/origin-isolation/removing-iframes.sub.https.html
+++ b/testing/web-platform/tests/origin-isolation/removing-iframes.sub.https.html
@@ -11,7 +11,7 @@ import {
   insertIframe,
   testSameAgentCluster,
   testDifferentAgentClusters,
-  testOriginIsolationRestricted
+  testGetter
 } from "./resources/helpers.mjs";
 
 let frame1;
@@ -23,8 +23,8 @@ promise_setup(async () => {
 // as is the child's non-request. So the parent ends up in the origin-keyed
 // agent cluster and the child ends up in the site-keyed one.
 testDifferentAgentClusters([self, 0], "Before");
-testOriginIsolationRestricted(self, true, "parent");
-testOriginIsolationRestricted(0, false, "child1");
+testGetter(self, true, "parent");
+testGetter(0, false, "child1");
 
 promise_test(async () => {
   frame1.remove();
@@ -41,6 +41,6 @@ testDifferentAgentClusters([self, 1], "Parent to child3");
 testSameAgentCluster([0, 1], "child2 to child3");
 testSameAgentCluster([1, 0], "child3 to child2");
 
-testOriginIsolationRestricted(0, false, "child2");
-testOriginIsolationRestricted(1, false, "child3");
+testGetter(0, false, "child2");
+testGetter(1, false, "child3");
 </script>
diff --git a/testing/web-platform/tests/origin-isolation/resources/child-frame-script.mjs b/testing/web-platform/tests/origin-isolation/resources/child-frame-script.mjs
index 783e36092daa..0d901fe59447 100644
--- a/testing/web-platform/tests/origin-isolation/resources/child-frame-script.mjs
+++ b/testing/web-platform/tests/origin-isolation/resources/child-frame-script.mjs
@@ -38,8 +38,8 @@ window.onmessage = async (e) => {
     } else {
       parent.postMessage("something wierd happened", "*");
     }
-  } else if (e.data.command === "get originIsolationRestricted") {
-    parent.postMessage(self.originIsolationRestricted, "*");
+  } else if (e.data.command === "get originIsolated") {
+    parent.postMessage(self.originIsolated, "*");
   }
 
   // We could also receive e.data === "WebAssembly.Module message received",
diff --git a/testing/web-platform/tests/origin-isolation/resources/helpers.mjs b/testing/web-platform/tests/origin-isolation/resources/helpers.mjs
index 73f9406b476b..b8ea2bf98ded 100644
--- a/testing/web-platform/tests/origin-isolation/resources/helpers.mjs
+++ b/testing/web-platform/tests/origin-isolation/resources/helpers.mjs
@@ -177,28 +177,28 @@ export function testDifferentAgentClusters(testFrames, testLabelPrefix) {
 }
 
 /**
- * Creates a promise_test() to check the value of the originIsolationRestricted
- * getter in the given testFrame.
+ * Creates a promise_test() to check the value of the originIsolated getter in
+ * the given testFrame.
  * @param {Window|number} testFrame - Either self, or a frame index to test.
- * @param {boolean} expected - The expected value for originIsolationRestricted.
+ * @param {boolean} expected - The expected value for originIsolated.
  * @param {string=} testLabelPrefix - A prefix used in the test names. This can
  *   be omitted if the function is only used once in a test file.
  */
-export function testOriginIsolationRestricted(testFrame, expected, testLabelPrefix) {
+export function testGetter(testFrame, expected, testLabelPrefix) {
   const prefix = testLabelPrefix === undefined ? "" : `${testLabelPrefix}: `;
 
   if (testFrame === self) {
     // Need to use promise_test() even though it's sync because we use
     // promise_setup() in many tests.
     promise_test(async () => {
-      assert_equals(self.originIsolationRestricted, expected);
-    }, `${prefix}originIsolationRestricted must equal ${expected}`);
+      assert_equals(self.originIsolated, expected);
+    }, `${prefix}originIsolated must equal ${expected}`);
   } else {
     promise_test(async () => {
       const frameWindow = frames[testFrame];
-      const result = await getOriginIsolationRestricted(frameWindow);
+      const result = await accessOriginIsolated(frameWindow);
       assert_equals(result, expected);
-    }, `${prefix}originIsolationRestricted must equal ${expected}`);
+    }, `${prefix}originIsolated must equal ${expected}`);
   }
 }
 
@@ -241,10 +241,10 @@ export async function setBothDocumentDomains(frameWindow) {
   assert_equals(whatHappened, "document.domain is set");
 }
 
-async function getOriginIsolationRestricted(frameWindow) {
+async function accessOriginIsolated(frameWindow) {
   // This function is coupled to ./send-origin-isolation-header.py, which ensures
   // that sending such a message will result in a message back.
-  frameWindow.postMessage({ command: "get originIsolationRestricted" }, "*");
+  frameWindow.postMessage({ command: "get originIsolated" }, "*");
   return waitForMessage(frameWindow);
 }