diff --git a/components/script/dom/testbinding.rs b/components/script/dom/testbinding.rs
index a5bb29a7e76..2beaa4d8897 100644
--- a/components/script/dom/testbinding.rs
+++ b/components/script/dom/testbinding.rs
@@ -472,6 +472,9 @@ impl TestBindingMethods for TestBinding {
     fn PassStringSequence(&self, _: Vec<DOMString>) {}
     fn PassInterfaceSequence(&self, _: Vec<DomRoot<Blob>>) {}
 
+    fn PassOverloaded(&self, _: CustomAutoRooterGuard<typedarray::ArrayBuffer>) {}
+    fn PassOverloaded_(&self, _: DOMString) {}
+
     fn PassNullableBoolean(&self, _: Option<bool>) {}
     fn PassNullableByte(&self, _: Option<i8>) {}
     fn PassNullableOctet(&self, _: Option<u8>) {}
diff --git a/components/script/dom/webidls/TestBinding.webidl b/components/script/dom/webidls/TestBinding.webidl
index 1a1c86293cb..f95f4505ffb 100644
--- a/components/script/dom/webidls/TestBinding.webidl
+++ b/components/script/dom/webidls/TestBinding.webidl
@@ -275,6 +275,9 @@ interface TestBinding {
   void passStringSequence(sequence<DOMString> seq);
   void passInterfaceSequence(sequence<Blob> seq);
 
+  void passOverloaded(ArrayBuffer arg);
+  void passOverloaded(DOMString arg);
+
   void passNullableBoolean(boolean? arg);
   void passNullableByte(byte? arg);
   void passNullableOctet(octet? arg);