diff --git a/tests/wpt/meta/resize-observer/iframe-same-origin.html.ini b/tests/wpt/meta/resize-observer/iframe-same-origin.html.ini
new file mode 100644
index 00000000000..136e57beb0c
--- /dev/null
+++ b/tests/wpt/meta/resize-observer/iframe-same-origin.html.ini
@@ -0,0 +1,2 @@
+[iframe-same-origin.html]
+  expected: [PASS, FAIL]
diff --git a/tests/wpt/meta/resize-observer/observe.html.ini b/tests/wpt/meta/resize-observer/observe.html.ini
index dd91e2b3606..2f1fca50001 100644
--- a/tests/wpt/meta/resize-observer/observe.html.ini
+++ b/tests/wpt/meta/resize-observer/observe.html.ini
@@ -2,3 +2,12 @@
   expected: TIMEOUT
   [guard]
     expected: NOTRUN
+
+  [test8: simple content-box observation]
+    expected: [PASS, FAIL]
+
+  [test9: simple content-box observation but keep border-box size unchanged]
+    expected: [PASS, FAIL]
+
+  [test10: simple border-box observation]
+    expected: [PASS, FAIL]