diff --git a/LayoutTests/ChangeLog b/LayoutTests/ChangeLog
index e614d09..d86873b 100644
--- a/LayoutTests/ChangeLog
+++ b/LayoutTests/ChangeLog
@@ -1,5 +1,14 @@
 2021-07-30  Eric Hutchison  <ehutchison@apple.com>
 
+        imported/w3c/web-platform-tests/html/cross-origin-opener-policy/iframe-popup-same-origin-to-unsafe-none.https.html is a flaky failure .
+        https://bugs.webkit.org/show_bug.cgi?id=228642.
+
+        Unreviewed test gardening.
+
+        * platform/mac/TestExpectations:
+
+2021-07-30  Eric Hutchison  <ehutchison@apple.com>
+
         [Mac Debug] imported/w3c/web-platform-tests/html/cross-origin-embedder-policy/credentialless/dedicated-worker.tentative.https.html is a flaky failure.
         https://bugs.webkit.org/show_bug.cgi?id=228640.
 
diff --git a/LayoutTests/platform/mac/TestExpectations b/LayoutTests/platform/mac/TestExpectations
index 742e416..d2356f4 100644
--- a/LayoutTests/platform/mac/TestExpectations
+++ b/LayoutTests/platform/mac/TestExpectations
@@ -2320,5 +2320,7 @@
 
 webkit.org/b/228640 [ Debug ] imported/w3c/web-platform-tests/html/cross-origin-embedder-policy/credentialless/dedicated-worker.tentative.https.html [ Pass Failure ]
 
+webkit.org/b/228642 imported/w3c/web-platform-tests/html/cross-origin-opener-policy/iframe-popup-same-origin-to-unsafe-none.https.html [ Pass Failure ]
+
 webkit.org/b/228396 fast/speechsynthesis/speech-synthesis-speak-empty-string.html [ Pass Failure ]