diff --git a/components/script/dom/htmlelement.rs b/components/script/dom/htmlelement.rs
index 695cdbe6a493..4c4d86f16423 100644
--- a/components/script/dom/htmlelement.rs
+++ b/components/script/dom/htmlelement.rs
@@ -568,6 +568,27 @@ impl HTMLElementMethods for HTMLElement {
             },
         );
     }
+
+    // https://html.spec.whatwg.org/multipage/#dom-contenteditable
+    fn ContentEditable(&self) -> DOMString {
+        // TODO: https://github.com/servo/servo/issues/12776
+        self.upcast::<Element>()
+            .get_attribute(&ns!(), &local_name!("contenteditable"))
+            .map(|attr| DOMString::from(&**attr.value()))
+            .unwrap_or_else(|| DOMString::from("inherit"))
+    }
+
+    // https://html.spec.whatwg.org/multipage/#dom-contenteditable
+    fn SetContentEditable(&self, _: DOMString) {
+        // TODO: https://github.com/servo/servo/issues/12776
+        warn!("The contentEditable attribute is not implemented yet");
+    }
+
+    // https://html.spec.whatwg.org/multipage/#dom-contenteditable
+    fn IsContentEditable(&self) -> bool {
+        // TODO: https://github.com/servo/servo/issues/12776
+        false
+    }
 }
 
 fn append_text_node_to_fragment(document: &Document, fragment: &DocumentFragment, text: String) {
diff --git a/components/script/dom/webidls/ElementContentEditable.webidl b/components/script/dom/webidls/ElementContentEditable.webidl
index ba7966c225dc..8429700e93eb 100644
--- a/components/script/dom/webidls/ElementContentEditable.webidl
+++ b/components/script/dom/webidls/ElementContentEditable.webidl
@@ -5,7 +5,7 @@
 // https://html.spec.whatwg.org/multipage/#elementcontenteditable
 [Exposed=Window]
 interface mixin ElementContentEditable {
-  // [CEReactions]
-  // attribute DOMString contentEditable;
-  // readonly attribute boolean isContentEditable;
+  [CEReactions]
+  attribute DOMString contentEditable;
+  readonly attribute boolean isContentEditable;
 };
diff --git a/tests/wpt/metadata/html/dom/idlharness.https.html.ini b/tests/wpt/metadata/html/dom/idlharness.https.html.ini
index 1456f232136f..e3b55e1876a1 100644
--- a/tests/wpt/metadata/html/dom/idlharness.https.html.ini
+++ b/tests/wpt/metadata/html/dom/idlharness.https.html.ini
@@ -2403,9 +2403,6 @@
   [HTMLMeterElement interface: document.createElement("meter") must inherit property "value" with the proper type]
     expected: FAIL
 
-  [HTMLElement interface: attribute isContentEditable]
-    expected: FAIL
-
   [HTMLEmbedElement interface: attribute align]
     expected: FAIL
 
@@ -2616,9 +2613,6 @@
   [HTMLInputElement interface: document.createElement("input") must inherit property "useMap" with the proper type]
     expected: FAIL
 
-  [HTMLElement interface: document.createElement("noscript") must inherit property "isContentEditable" with the proper type]
-    expected: FAIL
-
   [HTMLAreaElement interface: attribute ping]
     expected: FAIL
 
@@ -3234,9 +3228,6 @@
   [HTMLMarqueeElement interface: document.createElement("marquee") must inherit property "trueSpeed" with the proper type]
     expected: FAIL
 
-  [HTMLElement interface: attribute contentEditable]
-    expected: FAIL
-
   [HTMLInputElement interface: createInput("file") must inherit property "align" with the proper type]
     expected: FAIL
 
@@ -3579,9 +3570,6 @@
   [HTMLTableCellElement interface: document.createElement("th") must inherit property "ch" with the proper type]
     expected: FAIL
 
-  [HTMLElement interface: document.createElement("noscript") must inherit property "contentEditable" with the proper type]
-    expected: FAIL
-
   [HTMLTextAreaElement interface: document.createElement("textarea") must inherit property "autocomplete" with the proper type]
     expected: FAIL