diff --git a/components/script/dom/bindings/root.rs b/components/script/dom/bindings/root.rs
index 32c3e5c7eaa..a7f4bb9e411 100644
--- a/components/script/dom/bindings/root.rs
+++ b/components/script/dom/bindings/root.rs
@@ -237,20 +237,20 @@ impl LayoutJS<Node> {
 /// on `Dom<T>`.
 #[must_root]
 #[derive(JSTraceable)]
-pub struct MutJS<T: DomObject> {
+pub struct MutDom<T: DomObject> {
     val: UnsafeCell<Dom<T>>,
 }
 
-impl<T: DomObject> MutJS<T> {
-    /// Create a new `MutJS`.
-    pub fn new(initial: &T) -> MutJS<T> {
+impl<T: DomObject> MutDom<T> {
+    /// Create a new `MutDom`.
+    pub fn new(initial: &T) -> MutDom<T> {
         debug_assert!(thread_state::get().is_script());
-        MutJS {
+        MutDom {
             val: UnsafeCell::new(Dom::from_ref(initial)),
         }
     }
 
-    /// Set this `MutJS` to the given value.
+    /// Set this `MutDom` to the given value.
     pub fn set(&self, val: &T) {
         debug_assert!(thread_state::get().is_script());
         unsafe {
@@ -258,7 +258,7 @@ impl<T: DomObject> MutJS<T> {
         }
     }
 
-    /// Get the value in this `MutJS`.
+    /// Get the value in this `MutDom`.
     pub fn get(&self) -> Root<T> {
         debug_assert!(thread_state::get().is_script());
         unsafe {
@@ -267,14 +267,14 @@ impl<T: DomObject> MutJS<T> {
     }
 }
 
-impl<T: DomObject> HeapSizeOf for MutJS<T> {
+impl<T: DomObject> HeapSizeOf for MutDom<T> {
     fn heap_size_of_children(&self) -> usize {
         // See comment on HeapSizeOf for Dom<T>.
         0
     }
 }
 
-impl<T: DomObject> PartialEq for MutJS<T> {
+impl<T: DomObject> PartialEq for MutDom<T> {
    fn eq(&self, other: &Self) -> bool {
         unsafe {
             *self.val.get() == *other.val.get()
@@ -282,7 +282,7 @@ impl<T: DomObject> PartialEq for MutJS<T> {
     }
 }
 
-impl<T: DomObject + PartialEq> PartialEq<T> for MutJS<T> {
+impl<T: DomObject + PartialEq> PartialEq<T> for MutDom<T> {
     fn eq(&self, other: &T) -> bool {
         unsafe {
             **self.val.get() == *other
diff --git a/components/script/dom/mod.rs b/components/script/dom/mod.rs
index 8020d832ab9..7c683edf9eb 100644
--- a/components/script/dom/mod.rs
+++ b/components/script/dom/mod.rs
@@ -33,7 +33,7 @@
 //!   the [`Root`](bindings/root/struct.Root.html) smart pointer;
 //! * tracing pointers in member fields: the [`Dom`](bindings/root/struct.Dom.html),
 //!   [`MutNullableJS`](bindings/root/struct.MutNullableJS.html) and
-//!   [`MutJS`](bindings/root/struct.MutJS.html) smart pointers and
+//!   [`MutDom`](bindings/root/struct.MutDom.html) smart pointers and
 //!   [the tracing implementation](bindings/trace/index.html);
 //! * rooting pointers from across thread boundaries or in channels: the
 //!   [`Trusted`](bindings/refcounted/struct.Trusted.html) smart pointer;
diff --git a/components/script/dom/nodeiterator.rs b/components/script/dom/nodeiterator.rs
index 0ab8c54360b..ec18066a978 100644
--- a/components/script/dom/nodeiterator.rs
+++ b/components/script/dom/nodeiterator.rs
@@ -10,7 +10,7 @@ use dom::bindings::codegen::Bindings::NodeIteratorBinding;
 use dom::bindings::codegen::Bindings::NodeIteratorBinding::NodeIteratorMethods;
 use dom::bindings::error::Fallible;
 use dom::bindings::reflector::{Reflector, reflect_dom_object};
-use dom::bindings::root::{Dom, MutJS, Root};
+use dom::bindings::root::{Dom, MutDom, Root};
 use dom::document::Document;
 use dom::node::Node;
 use dom_struct::dom_struct;
@@ -22,7 +22,7 @@ pub struct NodeIterator {
     reflector_: Reflector,
     root_node: Dom<Node>,
     #[ignore_heap_size_of = "Defined in rust-mozjs"]
-    reference_node: MutJS<Node>,
+    reference_node: MutDom<Node>,
     pointer_before_reference_node: Cell<bool>,
     what_to_show: u32,
     #[ignore_heap_size_of = "Can't measure due to #6870"]
@@ -36,7 +36,7 @@ impl NodeIterator {
         NodeIterator {
             reflector_: Reflector::new(),
             root_node: Dom::from_ref(root_node),
-            reference_node: MutJS::new(root_node),
+            reference_node: MutDom::new(root_node),
             pointer_before_reference_node: Cell::new(true),
             what_to_show: what_to_show,
             filter: filter
diff --git a/components/script/dom/range.rs b/components/script/dom/range.rs
index 1344f9c7a5c..79091beff55 100644
--- a/components/script/dom/range.rs
+++ b/components/script/dom/range.rs
@@ -14,7 +14,7 @@ use dom::bindings::error::{Error, ErrorResult, Fallible};
 use dom::bindings::inheritance::{CharacterDataTypeId, NodeTypeId};
 use dom::bindings::inheritance::Castable;
 use dom::bindings::reflector::{Reflector, reflect_dom_object};
-use dom::bindings::root::{Dom, MutJS, Root, RootedReference};
+use dom::bindings::root::{Dom, MutDom, Root, RootedReference};
 use dom::bindings::str::DOMString;
 use dom::bindings::trace::JSTraceable;
 use dom::bindings::weakref::{WeakRef, WeakRefVec};
@@ -933,7 +933,7 @@ impl RangeMethods for Range {
 #[derive(DenyPublicFields, HeapSizeOf, JSTraceable)]
 #[must_root]
 pub struct BoundaryPoint {
-    node: MutJS<Node>,
+    node: MutDom<Node>,
     offset: Cell<u32>,
 }
 
@@ -942,7 +942,7 @@ impl BoundaryPoint {
         debug_assert!(!node.is_doctype());
         debug_assert!(offset <= node.len());
         BoundaryPoint {
-            node: MutJS::new(node),
+            node: MutDom::new(node),
             offset: Cell::new(offset),
         }
     }
diff --git a/components/script/dom/touch.rs b/components/script/dom/touch.rs
index d7920a2dd19..d526e607d8d 100644
--- a/components/script/dom/touch.rs
+++ b/components/script/dom/touch.rs
@@ -6,7 +6,7 @@ use dom::bindings::codegen::Bindings::TouchBinding;
 use dom::bindings::codegen::Bindings::TouchBinding::TouchMethods;
 use dom::bindings::num::Finite;
 use dom::bindings::reflector::{Reflector, reflect_dom_object};
-use dom::bindings::root::{MutJS, Root};
+use dom::bindings::root::{MutDom, Root};
 use dom::eventtarget::EventTarget;
 use dom::window::Window;
 use dom_struct::dom_struct;
@@ -15,7 +15,7 @@ use dom_struct::dom_struct;
 pub struct Touch {
     reflector_: Reflector,
     identifier: i32,
-    target: MutJS<EventTarget>,
+    target: MutDom<EventTarget>,
     screen_x: f64,
     screen_y: f64,
     client_x: f64,
@@ -32,7 +32,7 @@ impl Touch {
         Touch {
             reflector_: Reflector::new(),
             identifier: identifier,
-            target: MutJS::new(target),
+            target: MutDom::new(target),
             screen_x: *screen_x,
             screen_y: *screen_y,
             client_x: *client_x,
diff --git a/components/script/dom/touchevent.rs b/components/script/dom/touchevent.rs
index 4c29bc48445..92ff9bf0424 100644
--- a/components/script/dom/touchevent.rs
+++ b/components/script/dom/touchevent.rs
@@ -7,7 +7,7 @@ use dom::bindings::codegen::Bindings::TouchEventBinding::TouchEventMethods;
 use dom::bindings::codegen::Bindings::UIEventBinding::UIEventMethods;
 use dom::bindings::inheritance::Castable;
 use dom::bindings::reflector::reflect_dom_object;
-use dom::bindings::root::{MutJS, Root};
+use dom::bindings::root::{MutDom, Root};
 use dom::bindings::str::DOMString;
 use dom::event::{EventBubbles, EventCancelable};
 use dom::touchlist::TouchList;
@@ -19,9 +19,9 @@ use std::cell::Cell;
 #[dom_struct]
 pub struct TouchEvent {
     uievent: UIEvent,
-    touches: MutJS<TouchList>,
-    target_touches: MutJS<TouchList>,
-    changed_touches: MutJS<TouchList>,
+    touches: MutDom<TouchList>,
+    target_touches: MutDom<TouchList>,
+    changed_touches: MutDom<TouchList>,
     alt_key: Cell<bool>,
     meta_key: Cell<bool>,
     ctrl_key: Cell<bool>,
@@ -34,9 +34,9 @@ impl TouchEvent {
                      target_touches: &TouchList) -> TouchEvent {
         TouchEvent {
             uievent: UIEvent::new_inherited(),
-            touches: MutJS::new(touches),
-            target_touches: MutJS::new(target_touches),
-            changed_touches: MutJS::new(changed_touches),
+            touches: MutDom::new(touches),
+            target_touches: MutDom::new(target_touches),
+            changed_touches: MutDom::new(changed_touches),
             ctrl_key: Cell::new(false),
             shift_key: Cell::new(false),
             alt_key: Cell::new(false),
diff --git a/components/script/dom/treewalker.rs b/components/script/dom/treewalker.rs
index bbb27c61541..61a085aaa53 100644
--- a/components/script/dom/treewalker.rs
+++ b/components/script/dom/treewalker.rs
@@ -10,7 +10,7 @@ use dom::bindings::codegen::Bindings::TreeWalkerBinding;
 use dom::bindings::codegen::Bindings::TreeWalkerBinding::TreeWalkerMethods;
 use dom::bindings::error::Fallible;
 use dom::bindings::reflector::{Reflector, reflect_dom_object};
-use dom::bindings::root::{Dom, MutJS, Root};
+use dom::bindings::root::{Dom, MutDom, Root};
 use dom::document::Document;
 use dom::node::Node;
 use dom_struct::dom_struct;
@@ -21,7 +21,7 @@ use std::rc::Rc;
 pub struct TreeWalker {
     reflector_: Reflector,
     root_node: Dom<Node>,
-    current_node: MutJS<Node>,
+    current_node: MutDom<Node>,
     what_to_show: u32,
     #[ignore_heap_size_of = "function pointers and Rc<T> are hard"]
     filter: Filter
@@ -34,7 +34,7 @@ impl TreeWalker {
         TreeWalker {
             reflector_: Reflector::new(),
             root_node: Dom::from_ref(root_node),
-            current_node: MutJS::new(root_node),
+            current_node: MutDom::new(root_node),
             what_to_show: what_to_show,
             filter: filter
         }
diff --git a/components/script/dom/vrdisplay.rs b/components/script/dom/vrdisplay.rs
index a17666e625e..d6e8d480c3d 100644
--- a/components/script/dom/vrdisplay.rs
+++ b/components/script/dom/vrdisplay.rs
@@ -18,7 +18,7 @@ use dom::bindings::inheritance::Castable;
 use dom::bindings::num::Finite;
 use dom::bindings::refcounted::Trusted;
 use dom::bindings::reflector::{DomObject, reflect_dom_object};
-use dom::bindings::root::{MutJS, MutNullableJS, Root};
+use dom::bindings::root::{MutDom, MutNullableJS, Root};
 use dom::bindings::str::DOMString;
 use dom::event::Event;
 use dom::eventtarget::EventTarget;
@@ -51,9 +51,9 @@ pub struct VRDisplay {
     depth_near: Cell<f64>,
     depth_far: Cell<f64>,
     presenting: Cell<bool>,
-    left_eye_params: MutJS<VREyeParameters>,
-    right_eye_params: MutJS<VREyeParameters>,
-    capabilities: MutJS<VRDisplayCapabilities>,
+    left_eye_params: MutDom<VREyeParameters>,
+    right_eye_params: MutDom<VREyeParameters>,
+    capabilities: MutDom<VRDisplayCapabilities>,
     stage_params: MutNullableJS<VRStageParameters>,
     #[ignore_heap_size_of = "Defined in rust-webvr"]
     frame_data: DOMRefCell<WebVRFrameData>,
@@ -100,9 +100,9 @@ impl VRDisplay {
             depth_near: Cell::new(0.01),
             depth_far: Cell::new(10000.0),
             presenting: Cell::new(false),
-            left_eye_params: MutJS::new(&*VREyeParameters::new(display.left_eye_parameters.clone(), &global)),
-            right_eye_params: MutJS::new(&*VREyeParameters::new(display.right_eye_parameters.clone(), &global)),
-            capabilities: MutJS::new(&*VRDisplayCapabilities::new(display.capabilities.clone(), &global)),
+            left_eye_params: MutDom::new(&*VREyeParameters::new(display.left_eye_parameters.clone(), &global)),
+            right_eye_params: MutDom::new(&*VREyeParameters::new(display.right_eye_parameters.clone(), &global)),
+            capabilities: MutDom::new(&*VRDisplayCapabilities::new(display.capabilities.clone(), &global)),
             stage_params: MutNullableJS::new(stage.as_ref().map(|v| v.deref())),
             frame_data: DOMRefCell::new(Default::default()),
             layer: DOMRefCell::new(Default::default()),
diff --git a/python/tidy/servo_tidy/tidy.py b/python/tidy/servo_tidy/tidy.py
index cd4bf6feb97..d7c83ee8cee 100644
--- a/python/tidy/servo_tidy/tidy.py
+++ b/python/tidy/servo_tidy/tidy.py
@@ -575,10 +575,10 @@ def check_rust(file_name, lines):
             (r": &String", "use &str instead of &String", no_filter),
             # There should be any use of banned types:
             # Cell<JSVal>, Cell<Dom<T>>, DOMRefCell<Dom<T>>, DOMRefCell<HEAP<T>>
-            (r"(\s|:)+Cell<JSVal>", "Banned type Cell<JSVal> detected. Use MutJS<JSVal> instead", no_filter),
-            (r"(\s|:)+Cell<Dom<.+>>", "Banned type Cell<Dom<T>> detected. Use MutJS<T> instead", no_filter),
-            (r"DOMRefCell<Dom<.+>>", "Banned type DOMRefCell<Dom<T>> detected. Use MutJS<T> instead", no_filter),
-            (r"DOMRefCell<Heap<.+>>", "Banned type DOMRefCell<Heap<T>> detected. Use MutJS<T> instead", no_filter),
+            (r"(\s|:)+Cell<JSVal>", "Banned type Cell<JSVal> detected. Use MutDom<JSVal> instead", no_filter),
+            (r"(\s|:)+Cell<Dom<.+>>", "Banned type Cell<Dom<T>> detected. Use MutDom<T> instead", no_filter),
+            (r"DOMRefCell<Dom<.+>>", "Banned type DOMRefCell<Dom<T>> detected. Use MutDom<T> instead", no_filter),
+            (r"DOMRefCell<Heap<.+>>", "Banned type DOMRefCell<Heap<T>> detected. Use MutDom<T> instead", no_filter),
             # No benefit to using &Root<T>
             (r": &Root<", "use &T instead of &Root<T>", no_filter),
             (r"^&&", "operators should go at the end of the first line", no_filter),
diff --git a/python/tidy/servo_tidy_tests/ban-domrefcell.rs b/python/tidy/servo_tidy_tests/ban-domrefcell.rs
index f41358e7fa7..6d4e2b2fbc3 100644
--- a/python/tidy/servo_tidy_tests/ban-domrefcell.rs
+++ b/python/tidy/servo_tidy_tests/ban-domrefcell.rs
@@ -13,7 +13,7 @@ use script::test::Node;
 
 struct Foo {
     bar: DOMRefCell<Dom<Node>>
-    //~^ ERROR Banned type DOMRefCell<Dom<T>> detected. Use MutJS<T> instead
+    //~^ ERROR Banned type DOMRefCell<Dom<T>> detected. Use MutDom<T> instead
 }
 
 fn main() {}
diff --git a/python/tidy/servo_tidy_tests/ban.rs b/python/tidy/servo_tidy_tests/ban.rs
index f828053d289..fc5c600041a 100644
--- a/python/tidy/servo_tidy_tests/ban.rs
+++ b/python/tidy/servo_tidy_tests/ban.rs
@@ -13,7 +13,7 @@ use std::cell::UnsafeCell;
 
 struct Foo {
     bar: Cell<JSVal>,
-    //~^ ERROR Banned type Cell<JSVal> detected. Use MutJS<JSVal> instead
+    //~^ ERROR Banned type Cell<JSVal> detected. Use MutDom<JSVal> instead
     foo: UnsafeCell<JSVal>
     //~^ NOT AN ERROR
 }
diff --git a/python/tidy/servo_tidy_tests/test_tidy.py b/python/tidy/servo_tidy_tests/test_tidy.py
index ce9906f5549..3761975c62b 100644
--- a/python/tidy/servo_tidy_tests/test_tidy.py
+++ b/python/tidy/servo_tidy_tests/test_tidy.py
@@ -147,11 +147,11 @@ class CheckTidiness(unittest.TestCase):
         self.assertNoMoreErrors(feature_errors)
 
         ban_errors = tidy.collect_errors_for_files(iterFile('ban.rs'), [], [tidy.check_rust], print_text=False)
-        self.assertEqual('Banned type Cell<JSVal> detected. Use MutJS<JSVal> instead', ban_errors.next()[2])
+        self.assertEqual('Banned type Cell<JSVal> detected. Use MutDom<JSVal> instead', ban_errors.next()[2])
         self.assertNoMoreErrors(ban_errors)
 
         ban_errors = tidy.collect_errors_for_files(iterFile('ban-domrefcell.rs'), [], [tidy.check_rust], print_text=False)
-        self.assertEqual('Banned type DOMRefCell<Dom<T>> detected. Use MutJS<T> instead', ban_errors.next()[2])
+        self.assertEqual('Banned type DOMRefCell<Dom<T>> detected. Use MutDom<T> instead', ban_errors.next()[2])
         self.assertNoMoreErrors(ban_errors)
 
     def test_spec_link(self):