diff --git a/components/script/dom/characterdata.rs b/components/script/dom/characterdata.rs
index 9db34a49f8c..747589ada5d 100644
--- a/components/script/dom/characterdata.rs
+++ b/components/script/dom/characterdata.rs
@@ -91,7 +91,7 @@ impl CharacterDataMethods for CharacterData {
         // If this is a Text node, we might need to re-parse (say, if our parent
         // is a <style> element.) We don't need to if this is a Comment or
         // ProcessingInstruction.
-        if let Some(_) = self.downcast::<Text>() {
+        if self.is::<Text>() {
             if let Some(parent_node) = node.GetParentNode() {
                 let mutation = ChildrenMutation::ChangeText;
                 vtable_for(&parent_node).children_changed(&mutation);
diff --git a/components/script/webdriver_handlers.rs b/components/script/webdriver_handlers.rs
index bae4480d14c..c01a7d9a51a 100644
--- a/components/script/webdriver_handlers.rs
+++ b/components/script/webdriver_handlers.rs
@@ -392,7 +392,7 @@ pub fn handle_is_selected(documents: &Documents,
             else if let Some(option_element) = node.downcast::<HTMLOptionElement>() {
                 Ok(option_element.Selected())
             }
-            else if let Some(_) = node.downcast::<HTMLElement>() {
+            else if node.is::<HTMLElement>() {
                 Ok(false) // regular elements are not selectable
             } else {
                 Err(())