diff --git a/testing/web-platform/meta/css/selectors/matches-nested.html.ini b/testing/web-platform/meta/css/selectors/matches-nested.html.ini
new file mode 100644
index 000000000000..2a18971fe48c
--- /dev/null
+++ b/testing/web-platform/meta/css/selectors/matches-nested.html.ini
@@ -0,0 +1,7 @@
+[matches-nested.html]
+  [Test nested :matches() chooses highest specificity for class outside :matches().]
+    expected: FAIL
+
+  [Test nested :matches() specificity for class within arguments.]
+    expected: FAIL
+
diff --git a/testing/web-platform/meta/css/selectors/matches-specificity.html.ini b/testing/web-platform/meta/css/selectors/matches-specificity.html.ini
new file mode 100644
index 000000000000..84f349b00ac8
--- /dev/null
+++ b/testing/web-platform/meta/css/selectors/matches-specificity.html.ini
@@ -0,0 +1,4 @@
+[matches-specificity.html]
+  [Test :matches() uses highest possible specificity]
+    expected: FAIL
+