diff --git a/components/script/dom/node.rs b/components/script/dom/node.rs
index f8ed845f7dd..f167b75a81d 100644
--- a/components/script/dom/node.rs
+++ b/components/script/dom/node.rs
@@ -982,8 +982,10 @@ impl Node {
                     NeedsSelectorFlags::No,
                     MatchingForInvalidation::No,
                 );
-                Ok(self
-                    .traverse_preorder(ShadowIncluding::No)
+                let mut descendants = self.traverse_preorder(ShadowIncluding::No);
+                // Skip the root of the tree.
+                assert!(&*descendants.next().unwrap() == self);
+                Ok(descendants
                     .filter_map(DomRoot::downcast)
                     .find(|element| matches_selector_list(&selectors, element, &mut ctx)))
             },
diff --git a/tests/wpt/meta/dom/nodes/ParentNode-querySelector-scope.html.ini b/tests/wpt/meta/dom/nodes/ParentNode-querySelector-scope.html.ini
index 6cc9f8bb118..67e3adb04e9 100644
--- a/tests/wpt/meta/dom/nodes/ParentNode-querySelector-scope.html.ini
+++ b/tests/wpt/meta/dom/nodes/ParentNode-querySelector-scope.html.ini
@@ -8,8 +8,5 @@
   [querySelector with :scope]
     expected: FAIL
 
-  [querySelector with id and sibling]
-    expected: FAIL
-
   [querySelectorAll with :scope]
     expected: FAIL
diff --git a/tests/wpt/meta/dom/nodes/ParentNode-querySelectors-exclusive.html.ini b/tests/wpt/meta/dom/nodes/ParentNode-querySelectors-exclusive.html.ini
deleted file mode 100644
index 9fff567e9f1..00000000000
--- a/tests/wpt/meta/dom/nodes/ParentNode-querySelectors-exclusive.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[ParentNode-querySelectors-exclusive.html]
-  [querySelector/querySelectorAll should not include their thisArg]
-    expected: FAIL
-