diff --git a/testing/web-platform/meta/origin-isolation/parent-no-child1-yes-child2-no-not-subdomain.sub.https.html.ini b/testing/web-platform/meta/origin-isolation/parent-no-child1-yes-child2-no-not-subdomain.sub.https.html.ini
new file mode 100644
index 000000000000..b0bcff8c8b05
--- /dev/null
+++ b/testing/web-platform/meta/origin-isolation/parent-no-child1-yes-child2-no-not-subdomain.sub.https.html.ini
@@ -0,0 +1,28 @@
+[parent-no-child1-yes-child2-no-not-subdomain.sub.https.html]
+  [child1 to child2: messageerror event must occur]
+    expected: FAIL
+
+  [Parent to child1: setting document.domain must not give sync access]
+    expected: FAIL
+
+  [parent: originIsolationRestricted must equal false]
+    expected: FAIL
+
+  [child1 to child2: setting document.domain must not give sync access]
+    expected: FAIL
+
+  [child2: originIsolationRestricted must equal false]
+    expected: FAIL
+
+  [child1: originIsolationRestricted must equal true]
+    expected: FAIL
+
+  [Parent to child1: messageerror event must occur]
+    expected: FAIL
+
+  [child2 to child1: setting document.domain must not give sync access]
+    expected: FAIL
+
+  [child2 to child1: messageerror event must occur]
+    expected: FAIL
+
diff --git a/testing/web-platform/meta/origin-isolation/parent-yes-child1-yes-child2-no-not-subdomain.sub.https.html.ini b/testing/web-platform/meta/origin-isolation/parent-yes-child1-yes-child2-no-not-subdomain.sub.https.html.ini
new file mode 100644
index 000000000000..1179fb52ce72
--- /dev/null
+++ b/testing/web-platform/meta/origin-isolation/parent-yes-child1-yes-child2-no-not-subdomain.sub.https.html.ini
@@ -0,0 +1,34 @@
+[parent-yes-child1-yes-child2-no-not-subdomain.sub.https.html]
+  [child1 to child2: messageerror event must occur]
+    expected: FAIL
+
+  [child2 to child1: setting document.domain must not give sync access]
+    expected: FAIL
+
+  [parent: originIsolationRestricted must equal true]
+    expected: FAIL
+
+  [Parent to child2: messageerror event must occur]
+    expected: FAIL
+
+  [child1 to child2: setting document.domain must not give sync access]
+    expected: FAIL
+
+  [child2: originIsolationRestricted must equal false]
+    expected: FAIL
+
+  [Parent to child1: setting document.domain must not give sync access]
+    expected: FAIL
+
+  [Parent to child2: setting document.domain must not give sync access]
+    expected: FAIL
+
+  [Parent to child1: messageerror event must occur]
+    expected: FAIL
+
+  [child1: originIsolationRestricted must equal true]
+    expected: FAIL
+
+  [child2 to child1: messageerror event must occur]
+    expected: FAIL
+