diff --git a/src/components/script/dom/testbinding.rs b/src/components/script/dom/testbinding.rs
index 8173a9829aa..35dc025cdae 100644
--- a/src/components/script/dom/testbinding.rs
+++ b/src/components/script/dom/testbinding.rs
@@ -122,6 +122,19 @@ impl TestBinding {
     pub fn PassOptionalNullableDoubleWithDefault(&self, _: Option<f64>) {}
     // pub fn PassOptionalNullableStringWithDefault(&self, _: Option<DOMString>) {}
     pub fn PassOptionalNullableInterfaceWithDefault(&self, _: Option<JS<Blob>>) {}
+
+    // pub fn PassOptionalNullableBooleanWithNonNullDefault(&self, _: Option<bool>) {}
+    // pub fn PassOptionalNullableByteWithNonNullDefault(&self, _: Option<i8>) {}
+    // pub fn PassOptionalNullableOctetWithNonNullDefault(&self, _: Option<u8>) {}
+    // pub fn PassOptionalNullableShortWithNonNullDefault(&self, _: Option<i16>) {}
+    // pub fn PassOptionalNullableUnsignedShortWithNonNullDefault(&self, _: Option<u16>) {}
+    // pub fn PassOptionalNullableLongWithNonNullDefault(&self, _: Option<i32>) {}
+    // pub fn PassOptionalNullableUnsignedLongWithNonNullDefault(&self, _: Option<u32>) {}
+    // pub fn PassOptionalNullableLongLongWithNonNullDefault(&self, _: Option<i64>) {}
+    // pub fn PassOptionalNullableUnsignedLongLongWithNonNullDefault(&self, _: Option<u64>) {}
+    // pub fn PassOptionalNullableFloatWithNonNullDefault(&self, _: Option<f32>) {}
+    // pub fn PassOptionalNullableDoubleWithNonNullDefault(&self, _: Option<f64>) {}
+    // pub fn PassOptionalNullableStringWithNonNullDefault(&self, _: Option<DOMString>) {}
 }
 
 impl Reflectable for TestBinding {
diff --git a/src/components/script/dom/webidls/TestBinding.webidl b/src/components/script/dom/webidls/TestBinding.webidl
index 5cb5a20a02e..c9d1a6745c4 100644
--- a/src/components/script/dom/webidls/TestBinding.webidl
+++ b/src/components/script/dom/webidls/TestBinding.webidl
@@ -82,4 +82,17 @@ interface TestBinding {
   void passOptionalNullableUnsignedLongLongWithDefault(optional unsigned long long? arg = null);
   // void passOptionalNullableStringWithDefault(optional DOMString? arg = null);
   void passOptionalNullableInterfaceWithDefault(optional Blob? arg = null);
+
+  // void passOptionalNullableBooleanWithNonNullDefault(optional boolean? arg = false);
+  // void passOptionalNullableByteWithNonNullDefault(optional byte? arg = 7);
+  // void passOptionalNullableOctetWithNonNullDefault(optional octet? arg = 7);
+  // void passOptionalNullableShortWithNonNullDefault(optional short? arg = 7);
+  // void passOptionalNullableUnsignedShortWithNonNullDefault(optional unsigned short? arg = 7);
+  // void passOptionalNullableLongWithNonNullDefault(optional long? arg = 7);
+  // void passOptionalNullableUnsignedLongWithNonNullDefault(optional unsigned long? arg = 7);
+  // void passOptionalNullableLongLongWithNonNullDefault(optional long long? arg = 7);
+  // void passOptionalNullableUnsignedLongLongWithNonNullDefault(optional unsigned long long? arg = 7);
+  // void passOptionalNullableFloatWithNonNullDefault(optional float? arg = 0.0);
+  // void passOptionalNullableDoubleWithNonNullDefault(optional double? arg = 0.0);
+  // void passOptionalNullableStringWithNonNullDefault(optional DOMString? arg = "");
 };