diff --git a/components/script/dom/node.rs b/components/script/dom/node.rs
index 961a8ddd701..496468d2f8c 100644
--- a/components/script/dom/node.rs
+++ b/components/script/dom/node.rs
@@ -2946,7 +2946,7 @@ impl NodeMethods<crate::DomTypeHolder> for Node {
 
     /// <https://dom.spec.whatwg.org/#dom-node-clonenode>
     fn CloneNode(&self, deep: bool, can_gc: CanGc) -> Fallible<DomRoot<Node>> {
-        if deep && self.is::<ShadowRoot>() {
+        if self.is::<ShadowRoot>() {
             return Err(Error::NotSupported);
         }
         Ok(Node::clone(
diff --git a/tests/wpt/meta-legacy-layout/shadow-dom/untriaged/elements-and-dom-objects/shadowroot-object/shadowroot-methods/test-010.html.ini b/tests/wpt/meta-legacy-layout/shadow-dom/untriaged/elements-and-dom-objects/shadowroot-object/shadowroot-methods/test-010.html.ini
deleted file mode 100644
index b36a91d4af1..00000000000
--- a/tests/wpt/meta-legacy-layout/shadow-dom/untriaged/elements-and-dom-objects/shadowroot-object/shadowroot-methods/test-010.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[test-010.html]
-  [A_10_01_02_09_T01]
-    expected: FAIL
diff --git a/tests/wpt/meta/MANIFEST.json b/tests/wpt/meta/MANIFEST.json
index 97d0ad8b040..4b6dcd7a337 100644
--- a/tests/wpt/meta/MANIFEST.json
+++ b/tests/wpt/meta/MANIFEST.json
@@ -765700,7 +765700,7 @@
      ]
     ],
     "Node-prototype-cloneNode.html": [
-     "0ee47d492e5ad0ec8c00d15d4897c19772c9651d",
+     "2f2a1110fc75a8eb199f9b1ae12e5f8d6377f08d",
      [
       null,
       {}
diff --git a/tests/wpt/meta/shadow-dom/Node-prototype-cloneNode.html.ini b/tests/wpt/meta/shadow-dom/Node-prototype-cloneNode.html.ini
deleted file mode 100644
index 6baad59fe78..00000000000
--- a/tests/wpt/meta/shadow-dom/Node-prototype-cloneNode.html.ini
+++ /dev/null
@@ -1,6 +0,0 @@
-[Node-prototype-cloneNode.html]
-  [cloneNode on a shadow root in open mode must throw a NotSupportedError]
-    expected: FAIL
-
-  [cloneNode on a shadow root in closed mode must throw a NotSupportedError]
-    expected: FAIL
diff --git a/tests/wpt/meta/shadow-dom/untriaged/elements-and-dom-objects/shadowroot-object/shadowroot-methods/test-010.html.ini b/tests/wpt/meta/shadow-dom/untriaged/elements-and-dom-objects/shadowroot-object/shadowroot-methods/test-010.html.ini
deleted file mode 100644
index b36a91d4af1..00000000000
--- a/tests/wpt/meta/shadow-dom/untriaged/elements-and-dom-objects/shadowroot-object/shadowroot-methods/test-010.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[test-010.html]
-  [A_10_01_02_09_T01]
-    expected: FAIL
diff --git a/tests/wpt/tests/shadow-dom/Node-prototype-cloneNode.html b/tests/wpt/tests/shadow-dom/Node-prototype-cloneNode.html
index 0ee47d492e5..2f2a1110fc7 100644
--- a/tests/wpt/tests/shadow-dom/Node-prototype-cloneNode.html
+++ b/tests/wpt/tests/shadow-dom/Node-prototype-cloneNode.html
@@ -23,7 +23,7 @@ function testCloneNode(mode) {
         assert_throws_dom('NotSupportedError', function () {
             var element = document.createElement('div');
             var shadowRoot = element.attachShadow({mode: mode});
-            shadowRoot.cloneNode(false);
+            shadowRoot.cloneNode(true);
         }, 'cloneNode(true) on a closed shadow root must throw a NotSupportedError');
 
     }, 'cloneNode on a shadow root in ' + mode + ' mode must throw a NotSupportedError');