diff --git a/components/script/dom/testbinding.rs b/components/script/dom/testbinding.rs
index 473f96f5704..6854ef493ee 100644
--- a/components/script/dom/testbinding.rs
+++ b/components/script/dom/testbinding.rs
@@ -192,6 +192,9 @@ impl TestBindingMethods for TestBinding {
     fn ReceiveUnion3(&self) -> StringOrLongSequence { StringOrLongSequence::eLongSequence(vec![]) }
     fn ReceiveUnion4(&self) -> StringOrStringSequence { StringOrStringSequence::eStringSequence(vec![]) }
     fn ReceiveSequence(&self) -> Vec<i32> { vec![1] }
+    fn ReceiveInterfaceSequence(&self) -> Vec<Root<Blob>> {
+        vec![Blob::new(self.global().r(), Vec::new(), "")]
+    }
 
     fn ReceiveNullableBoolean(&self) -> Option<bool> { Some(false) }
     fn ReceiveNullableByte(&self) -> Option<i8> { Some(0) }
@@ -253,6 +256,7 @@ impl TestBindingMethods for TestBinding {
     fn PassCallbackInterface(&self, _: Rc<EventListener>) {}
     fn PassSequence(&self, _: Vec<i32>) {}
     fn PassStringSequence(&self, _: Vec<DOMString>) {}
+    fn PassInterfaceSequence(&self, _: Vec<Root<Blob>>) {}
 
     fn PassNullableBoolean(&self, _: Option<bool>) {}
     fn PassNullableByte(&self, _: Option<i8>) {}
diff --git a/components/script/dom/webidls/TestBinding.webidl b/components/script/dom/webidls/TestBinding.webidl
index ee3250427fe..4863b1ce0b0 100644
--- a/components/script/dom/webidls/TestBinding.webidl
+++ b/components/script/dom/webidls/TestBinding.webidl
@@ -152,6 +152,7 @@ interface TestBinding {
   (DOMString or sequence<long>) receiveUnion3();
   (DOMString or sequence<DOMString>) receiveUnion4();
   sequence<long> receiveSequence();
+  sequence<Blob> receiveInterfaceSequence();
 
   byte? receiveNullableByte();
   boolean? receiveNullableBoolean();
@@ -205,6 +206,7 @@ interface TestBinding {
   void passCallbackInterface(EventListener listener);
   void passSequence(sequence<long> seq);
   void passStringSequence(sequence<DOMString> seq);
+  void passInterfaceSequence(sequence<Blob> seq);
 
   void passNullableBoolean(boolean? arg);
   void passNullableByte(byte? arg);