diff --git a/components/script/dom/response.rs b/components/script/dom/response.rs
index a1226204418..7607cacc972 100644
--- a/components/script/dom/response.rs
+++ b/components/script/dom/response.rs
@@ -298,7 +298,9 @@ impl ResponseMethods for Response {
     // https://fetch.spec.whatwg.org/#dom-response-clone
     fn Clone(&self) -> Fallible<Root<Response>> {
         // Step 1
-        // TODO: This step relies on body and stream, which are still unimplemented.
+        if self.is_locked() || self.body_used.get() {
+            return Err(Error::Type("cannot clone a disturbed response".to_string()));
+        }
 
         // Step 2
         let new_response = Response::new(&self.global());
diff --git a/tests/wpt/metadata/fetch/api/response/response-clone.html.ini b/tests/wpt/metadata/fetch/api/response/response-clone.html.ini
index ecd4656a2dc..dc3c577e415 100644
--- a/tests/wpt/metadata/fetch/api/response/response-clone.html.ini
+++ b/tests/wpt/metadata/fetch/api/response/response-clone.html.ini
@@ -6,9 +6,6 @@
   [Check cloned response's body]
     expected: FAIL
 
-  [Cannot clone a disturbed response]
-    expected: FAIL
-
   [Cloned responses should provide the same data]
     expected: FAIL