diff --git a/servo/components/compositing/Cargo.toml b/servo/components/compositing/Cargo.toml
index 37035dec23f8..fcc129e2cccc 100644
--- a/servo/components/compositing/Cargo.toml
+++ b/servo/components/compositing/Cargo.toml
@@ -31,8 +31,8 @@ path = "../net_traits"
 [dependencies.util]
 path = "../util"
 
-[dependencies.webdriver_server]
-path = "../webdriver_server"
+[dependencies.webdriver_traits]
+path = "../webdriver_traits"
 
 [dependencies.devtools_traits]
 path = "../devtools_traits"
diff --git a/servo/components/compositing/constellation.rs b/servo/components/compositing/constellation.rs
index eb54339d159f..2e7a975b7319 100644
--- a/servo/components/compositing/constellation.rs
+++ b/servo/components/compositing/constellation.rs
@@ -39,6 +39,7 @@ use util::geometry::PagePx;
 use util::opts;
 use util::task::spawn_named;
 use clipboard::ClipboardContext;
+use webdriver_traits::WebDriverScriptCommand;
 
 /// Maintains the pipelines and navigation context and grants permission to composite.
 pub struct Constellation<LTF, STF> {
@@ -410,6 +411,12 @@ impl<LTF: LayoutTaskFactory, STF: ScriptTaskFactory> Constellation<LTF, STF> {
                 };
                 sender.send(result).unwrap();
             }
+            ConstellationMsg::WebDriverCommandMsg(pipeline_id,
+                                                  command) => {
+                debug!("constellation got webdriver command message");
+                self.handle_webdriver_command_msg(pipeline_id,
+                                                  command);
+            }
         }
         true
     }
@@ -753,6 +760,17 @@ impl<LTF: LayoutTaskFactory, STF: ScriptTaskFactory> Constellation<LTF, STF> {
         self.focus_parent_pipeline(pipeline_id);
     }
 
+    fn handle_webdriver_command_msg(&mut self,
+                                    pipeline_id: PipelineId,
+                                    msg: WebDriverScriptCommand) {
+        // Find the script channel for the given parent pipeline,
+        // and pass the event to that script task.
+        let pipeline = self.pipeline(pipeline_id);
+        let control_msg = ConstellationControlMsg::WebDriverCommandMsg(pipeline_id, msg);
+        let ScriptControlChan(ref script_channel) = pipeline.script_chan;
+        script_channel.send(control_msg).unwrap();
+    }
+
     fn add_or_replace_pipeline_in_frame_tree(&mut self, frame_change: FrameChange) {
 
         // If the currently focused pipeline is the one being changed (or a child
diff --git a/servo/components/compositing/lib.rs b/servo/components/compositing/lib.rs
index f3f54cad3889..7b8d49348c3a 100644
--- a/servo/components/compositing/lib.rs
+++ b/servo/components/compositing/lib.rs
@@ -27,7 +27,7 @@ extern crate net_traits;
 #[macro_use]
 extern crate util;
 extern crate gleam;
-extern crate webdriver_server;
+extern crate webdriver_traits;
 extern crate clipboard;
 
 extern crate libc;
diff --git a/servo/components/msg/Cargo.toml b/servo/components/msg/Cargo.toml
index 4eeb3a3b5249..b3a0ebfe5d15 100644
--- a/servo/components/msg/Cargo.toml
+++ b/servo/components/msg/Cargo.toml
@@ -14,6 +14,9 @@ path = "../style"
 [dependencies.util]
 path = "../util"
 
+[dependencies.webdriver_traits]
+path = "../webdriver_traits"
+
 [dependencies.azure]
 git = "https://github.com/servo/rust-azure"
 
diff --git a/servo/components/msg/constellation_msg.rs b/servo/components/msg/constellation_msg.rs
index 6029541336fe..7b44a4b4c848 100644
--- a/servo/components/msg/constellation_msg.rs
+++ b/servo/components/msg/constellation_msg.rs
@@ -14,6 +14,7 @@ use layers::geometry::DevicePixel;
 use util::cursor::Cursor;
 use util::geometry::{PagePx, ViewportPx};
 use std::sync::mpsc::{channel, Sender, Receiver};
+use webdriver_traits::WebDriverScriptCommand;
 use url::Url;
 
 #[derive(Clone)]
@@ -231,6 +232,8 @@ pub enum Msg {
     FocusMsg(PipelineId),
     /// Requests that the constellation retrieve the current contents of the clipboard
     GetClipboardContents(Sender<String>),
+    // Dispatch a webdriver command
+    WebDriverCommandMsg(PipelineId, WebDriverScriptCommand)
 }
 
 // https://developer.mozilla.org/en-US/docs/Web/API/Using_the_Browser_API#Events
diff --git a/servo/components/msg/lib.rs b/servo/components/msg/lib.rs
index 7b52067c9277..fc125583e95d 100644
--- a/servo/components/msg/lib.rs
+++ b/servo/components/msg/lib.rs
@@ -9,6 +9,7 @@ extern crate hyper;
 extern crate layers;
 extern crate util;
 extern crate url;
+extern crate webdriver_traits;
 
 #[cfg(target_os="macos")]
 extern crate core_foundation;
diff --git a/servo/components/script/Cargo.toml b/servo/components/script/Cargo.toml
index 63eaea80142e..50607cabefed 100644
--- a/servo/components/script/Cargo.toml
+++ b/servo/components/script/Cargo.toml
@@ -42,6 +42,9 @@ path = "../gfx"
 [dependencies.canvas]
 path = "../canvas"
 
+[dependencies.webdriver_traits]
+path = "../webdriver_traits"
+
 [dependencies.cssparser]
 git = "https://github.com/servo/rust-cssparser"
 
diff --git a/servo/components/script/lib.rs b/servo/components/script/lib.rs
index b9f4b42f84dc..5c2e522f5d4b 100644
--- a/servo/components/script/lib.rs
+++ b/servo/components/script/lib.rs
@@ -52,6 +52,7 @@ extern crate style;
 extern crate url;
 extern crate uuid;
 extern crate string_cache;
+extern crate webdriver_traits;
 
 pub mod cors;
 
@@ -67,3 +68,4 @@ pub mod script_task;
 mod timers;
 pub mod textinput;
 mod devtools;
+mod webdriver_handlers;
diff --git a/servo/components/script/script_task.rs b/servo/components/script/script_task.rs
index 6886137e48c1..6de727451635 100644
--- a/servo/components/script/script_task.rs
+++ b/servo/components/script/script_task.rs
@@ -45,6 +45,7 @@ use layout_interface;
 use page::{Page, IterablePage, Frame};
 use timers::TimerId;
 use devtools;
+use webdriver_handlers;
 
 use devtools_traits::{DevtoolsControlChan, DevtoolsControlPort, DevtoolsPageInfo};
 use devtools_traits::{DevtoolsControlMsg, DevtoolScriptControlMsg};
@@ -56,6 +57,7 @@ use script_traits::CompositorEvent::{MouseMoveEvent, KeyEvent};
 use script_traits::{NewLayoutInfo, OpaqueScriptLayoutChannel};
 use script_traits::{ConstellationControlMsg, ScriptControlChan};
 use script_traits::ScriptTaskFactory;
+use webdriver_traits::WebDriverScriptCommand;
 use msg::compositor_msg::ReadyState::{FinishedLoading, Loading, PerformingLayout};
 use msg::compositor_msg::{LayerId, ScriptListener};
 use msg::constellation_msg::{ConstellationChan, FocusType};
@@ -727,6 +729,9 @@ impl ScriptTask {
                 self.handle_update_subpage_id(containing_pipeline_id, old_subpage_id, new_subpage_id),
             ConstellationControlMsg::FocusIFrameMsg(containing_pipeline_id, subpage_id) =>
                 self.handle_focus_iframe_msg(containing_pipeline_id, subpage_id),
+            ConstellationControlMsg::WebDriverCommandMsg(pipeline_id, msg) => {
+                self.handle_webdriver_msg(pipeline_id, msg);
+            }
         }
     }
 
@@ -783,6 +788,14 @@ impl ScriptTask {
         msg.responder.unwrap().respond(msg.image);
     }
 
+    fn handle_webdriver_msg(&self, pipeline_id: PipelineId, msg: WebDriverScriptCommand) {
+        let page = self.root_page();
+        match msg {
+            WebDriverScriptCommand::EvaluateJS(script, reply) =>
+                webdriver_handlers::handle_evaluate_js(&page, pipeline_id, script, reply)
+        }
+    }
+
     fn handle_resize(&self, id: PipelineId, size: WindowSizeData) {
         let page = self.page.borrow();
         if let Some(ref page) = page.as_ref() {
diff --git a/servo/components/script/webdriver_handlers.rs b/servo/components/script/webdriver_handlers.rs
new file mode 100644
index 000000000000..4d0aeca61ccd
--- /dev/null
+++ b/servo/components/script/webdriver_handlers.rs
@@ -0,0 +1,38 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use webdriver_traits::{EvaluateJSReply};
+use dom::bindings::conversions::FromJSValConvertible;
+use dom::bindings::conversions::StringificationBehavior;
+use dom::bindings::js::OptionalRootable;
+use dom::window::ScriptHelpers;
+use dom::document::DocumentHelpers;
+use page::Page;
+use msg::constellation_msg::PipelineId;
+use script_task::get_page;
+
+use std::rc::Rc;
+use std::sync::mpsc::Sender;
+
+pub fn handle_evaluate_js(page: &Rc<Page>, pipeline: PipelineId, eval: String, reply: Sender<Result<EvaluateJSReply, ()>>){
+    let page = get_page(&*page, pipeline);
+    let window = page.window().root();
+    let cx = window.r().get_cx();
+    let rval = window.r().evaluate_js_on_global_with_result(&eval);
+
+    reply.send(if rval.is_undefined() {
+        Ok(EvaluateJSReply::VoidValue)
+    } else if rval.is_boolean() {
+        Ok(EvaluateJSReply::BooleanValue(rval.to_boolean()))
+    } else if rval.is_double() {
+        Ok(EvaluateJSReply::NumberValue(FromJSValConvertible::from_jsval(cx, rval, ()).unwrap()))
+    } else if rval.is_string() {
+        //FIXME: use jsstring_to_str when jsval grows to_jsstring
+        Ok(EvaluateJSReply::StringValue(FromJSValConvertible::from_jsval(cx, rval, StringificationBehavior::Default).unwrap()))
+    } else if rval.is_null() {
+        Ok(EvaluateJSReply::NullValue)
+    } else {
+        Err(())
+    }).unwrap();
+}
diff --git a/servo/components/script_traits/Cargo.toml b/servo/components/script_traits/Cargo.toml
index d33e0ff6b982..9b41ae54ec2d 100644
--- a/servo/components/script_traits/Cargo.toml
+++ b/servo/components/script_traits/Cargo.toml
@@ -19,6 +19,9 @@ path = "../util"
 [dependencies.devtools_traits]
 path = "../devtools_traits"
 
+[dependencies.webdriver_traits]
+path = "../webdriver_traits"
+
 [dependencies.geom]
 git = "https://github.com/servo/rust-geom"
 
diff --git a/servo/components/script_traits/lib.rs b/servo/components/script_traits/lib.rs
index b5045d5a8323..82f917733dee 100644
--- a/servo/components/script_traits/lib.rs
+++ b/servo/components/script_traits/lib.rs
@@ -9,6 +9,7 @@ extern crate msg;
 extern crate net_traits;
 extern crate util;
 extern crate url;
+extern crate webdriver_traits;
 
 // This module contains traits in script used generically
 //   in the rest of Servo.
@@ -26,6 +27,7 @@ use net_traits::image_cache_task::ImageCacheTask;
 use net_traits::storage_task::StorageTask;
 use std::any::Any;
 use std::sync::mpsc::{Sender, Receiver};
+use webdriver_traits::WebDriverScriptCommand;
 
 use geom::point::Point2D;
 use geom::rect::Rect;
@@ -75,6 +77,8 @@ pub enum ConstellationControlMsg {
     UpdateSubpageId(PipelineId, SubpageId, SubpageId),
     /// Set an iframe to be focused. Used when an element in an iframe gains focus.
     FocusIFrameMsg(PipelineId, SubpageId),
+    // Passes a webdriver command to the script task for execution
+    WebDriverCommandMsg(PipelineId, WebDriverScriptCommand)
 }
 
 /// The mouse button involved in the event.
diff --git a/servo/components/servo/Cargo.lock b/servo/components/servo/Cargo.lock
index 46cf8773747f..b383fe6e733e 100644
--- a/servo/components/servo/Cargo.lock
+++ b/servo/components/servo/Cargo.lock
@@ -126,7 +126,7 @@ dependencies = [
  "time 0.1.19 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 0.2.23 (registry+https://github.com/rust-lang/crates.io-index)",
  "util 0.0.1",
- "webdriver_server 0.0.1",
+ "webdriver_traits 0.0.1",
 ]
 
 [[package]]
@@ -660,6 +660,7 @@ dependencies = [
  "style 0.0.1",
  "url 0.2.23 (registry+https://github.com/rust-lang/crates.io-index)",
  "util 0.0.1",
+ "webdriver_traits 0.0.1",
 ]
 
 [[package]]
@@ -856,6 +857,7 @@ dependencies = [
  "url 0.2.23 (registry+https://github.com/rust-lang/crates.io-index)",
  "util 0.0.1",
  "uuid 0.1.11 (git+https://github.com/rust-lang/uuid)",
+ "webdriver_traits 0.0.1",
 ]
 
 [[package]]
@@ -876,6 +878,7 @@ dependencies = [
  "net_traits 0.0.1",
  "url 0.2.23 (registry+https://github.com/rust-lang/crates.io-index)",
  "util 0.0.1",
+ "webdriver_traits 0.0.1",
 ]
 
 [[package]]
@@ -1050,7 +1053,7 @@ dependencies = [
 [[package]]
 name = "webdriver"
 version = "0.0.1"
-source = "git+https://github.com/jgraham/webdriver-rust.git#4f543416a269b9d0d7ee5332db489768c2a769dd"
+source = "git+https://github.com/jgraham/webdriver-rust.git#fa625e3cf8fdb39b503c1cc902506df3a1d1c9de"
 dependencies = [
  "hyper 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1069,6 +1072,14 @@ dependencies = [
  "util 0.0.1",
  "uuid 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "webdriver 0.0.1 (git+https://github.com/jgraham/webdriver-rust.git)",
+ "webdriver_traits 0.0.1",
+]
+
+[[package]]
+name = "webdriver_traits"
+version = "0.0.1"
+dependencies = [
+ "rustc-serialize 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
diff --git a/servo/components/webdriver_server/Cargo.toml b/servo/components/webdriver_server/Cargo.toml
index 337f8a6498a3..17fa3188e780 100644
--- a/servo/components/webdriver_server/Cargo.toml
+++ b/servo/components/webdriver_server/Cargo.toml
@@ -13,10 +13,13 @@ path = "../msg"
 [dependencies.util]
 path = "../util"
 
+[dependencies.webdriver_traits]
+path = "../webdriver_traits"
+
 [dependencies.webdriver]
 git = "https://github.com/jgraham/webdriver-rust.git"
 
 [dependencies]
-rustc-serialize="0.3.4"
+rustc-serialize = "0.3.4"
 url = "0.2.16"
 uuid = "0.1.11"
\ No newline at end of file
diff --git a/servo/components/webdriver_server/lib.rs b/servo/components/webdriver_server/lib.rs
index e8a1f4771b80..d1d57608f144 100644
--- a/servo/components/webdriver_server/lib.rs
+++ b/servo/components/webdriver_server/lib.rs
@@ -17,14 +17,16 @@ extern crate url;
 extern crate util;
 extern crate "rustc-serialize" as rustc_serialize;
 extern crate uuid;
+extern crate webdriver_traits;
 
-use msg::constellation_msg::{ConstellationChan, LoadData};
+use msg::constellation_msg::{ConstellationChan, LoadData, PipelineId};
 use msg::constellation_msg::Msg as ConstellationMsg;
 use std::sync::mpsc::channel;
+use webdriver_traits::WebDriverScriptCommand;
 
 use url::Url;
 use webdriver::command::{WebDriverMessage, WebDriverCommand};
-use webdriver::command::GetParameters;
+use webdriver::command::{GetParameters, JavascriptCommandParameters};
 use webdriver::response::{
     WebDriverResponse, NewSessionResponse, ValueResponse};
 use webdriver::server::{self, WebDriverHandler, Session};
@@ -51,7 +53,7 @@ struct WebdriverSession {
 
 struct Handler {
     session: Option<WebdriverSession>,
-    constellation_chan: ConstellationChan
+    constellation_chan: ConstellationChan,
 }
 
 impl WebdriverSession {
@@ -70,6 +72,14 @@ impl Handler {
         }
     }
 
+    fn get_root_pipeline(&self) -> PipelineId {
+        let (sender, reciever) = channel();
+        let ConstellationChan(ref const_chan) = self.constellation_chan;
+        const_chan.send(ConstellationMsg::GetRootPipeline(sender)).unwrap();
+
+        reciever.recv().unwrap().unwrap()
+    }
+
     fn handle_new_session(&mut self) -> WebDriverResult<WebDriverResponse> {
         if self.session.is_none() {
             let session = WebdriverSession::new();
@@ -92,13 +102,10 @@ impl Handler {
                                                "Invalid URL"))
         };
 
-        let (sender, reciever) = channel();
-        let ConstellationChan(ref const_chan) = self.constellation_chan;
-        const_chan.send(ConstellationMsg::GetRootPipeline(sender)).unwrap();
-
-        let pipeline_id = reciever.recv().unwrap().unwrap();
+        let pipeline_id = self.get_root_pipeline();
 
         let load_data = LoadData::new(url);
+        let ConstellationChan(ref const_chan) = self.constellation_chan;
         const_chan.send(ConstellationMsg::LoadUrl(pipeline_id, load_data)).unwrap();
         //TODO: Now we ought to wait until we get a load event
         Ok(WebDriverResponse::Void)
@@ -110,6 +117,32 @@ impl Handler {
         let handle = self.session.as_ref().unwrap().id.to_string();
         Ok(WebDriverResponse::Generic(ValueResponse::new(handle.to_json())))
     }
+
+    fn handle_execute_script(&self, parameters: &JavascriptCommandParameters)  -> WebDriverResult<WebDriverResponse> {
+        // TODO: This isn't really right because it always runs the script in the
+        // root window
+        let pipeline_id = self.get_root_pipeline();
+
+        let func_body = &parameters.script;
+        let args = &parameters.args;
+        let args_string = "";
+
+        // This is pretty ugly; we really want something that acts like
+        // new Function() and then takes the resulting function and executes
+        // it with a vec of arguments.
+        let script = format!("(function() {{ {} }})({})", func_body, args_string);
+
+        let (sender, reciever) = channel();
+        let ConstellationChan(ref const_chan) = self.constellation_chan;
+        const_chan.send(ConstellationMsg::WebDriverCommandMsg(pipeline_id,
+                                                              WebDriverScriptCommand::EvaluateJS(script, sender))).unwrap();
+
+        match reciever.recv().unwrap() {
+            Ok(value) => Ok(WebDriverResponse::Generic(ValueResponse::new(value.to_json()))),
+            Err(_) => Err(WebDriverError::new(ErrorStatus::UnsupportedOperation,
+                                              "Unsupported return type"))
+        }
+    }
 }
 
 impl WebDriverHandler for Handler {
@@ -119,6 +152,7 @@ impl WebDriverHandler for Handler {
             WebDriverCommand::NewSession => self.handle_new_session(),
             WebDriverCommand::Get(ref parameters) => self.handle_get(parameters),
             WebDriverCommand::GetWindowHandle => self.handle_get_window_handle(),
+            WebDriverCommand::ExecuteScript(ref x) => self.handle_execute_script(x),
             _ => Err(WebDriverError::new(ErrorStatus::UnsupportedOperation,
                                          "Command not implemented"))
         }
diff --git a/servo/components/webdriver_traits/Cargo.toml b/servo/components/webdriver_traits/Cargo.toml
new file mode 100644
index 000000000000..c4575e73a538
--- /dev/null
+++ b/servo/components/webdriver_traits/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "webdriver_traits"
+version = "0.0.1"
+authors = ["The Servo Project Developers"]
+
+[lib]
+name = "webdriver_traits"
+path = "lib.rs"
+
+[dependencies]
+rustc-serialize="0.3.4"
\ No newline at end of file
diff --git a/servo/components/webdriver_traits/lib.rs b/servo/components/webdriver_traits/lib.rs
new file mode 100644
index 000000000000..4e6a307f64a2
--- /dev/null
+++ b/servo/components/webdriver_traits/lib.rs
@@ -0,0 +1,36 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#![crate_name = "webdriver_traits"]
+#![crate_type = "rlib"]
+
+extern crate "rustc-serialize" as rustc_serialize;
+use rustc_serialize::json::{Json, ToJson};
+
+use std::sync::mpsc::Sender;
+
+pub enum WebDriverScriptCommand {
+    EvaluateJS(String, Sender<Result<EvaluateJSReply, ()>>)
+}
+
+pub enum EvaluateJSReply {
+    VoidValue,
+    NullValue,
+    BooleanValue(bool),
+    NumberValue(f64),
+    StringValue(String),
+    // TODO: ObjectValue and WebElementValue
+}
+
+impl ToJson for EvaluateJSReply {
+    fn to_json(&self) -> Json {
+        match self {
+            &EvaluateJSReply::VoidValue => Json::Null,
+            &EvaluateJSReply::NullValue => Json::Null,
+            &EvaluateJSReply::BooleanValue(ref x) => x.to_json(),
+            &EvaluateJSReply::NumberValue(ref x) => x.to_json(),
+            &EvaluateJSReply::StringValue(ref x) => x.to_json()
+        }
+    }
+}
diff --git a/servo/ports/cef/Cargo.lock b/servo/ports/cef/Cargo.lock
index 292f9c0e2afb..152b6359aeda 100644
--- a/servo/ports/cef/Cargo.lock
+++ b/servo/ports/cef/Cargo.lock
@@ -124,7 +124,7 @@ dependencies = [
  "time 0.1.19 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 0.2.23 (registry+https://github.com/rust-lang/crates.io-index)",
  "util 0.0.1",
- "webdriver_server 0.0.1",
+ "webdriver_traits 0.0.1",
 ]
 
 [[package]]
@@ -651,6 +651,7 @@ dependencies = [
  "style 0.0.1",
  "url 0.2.23 (registry+https://github.com/rust-lang/crates.io-index)",
  "util 0.0.1",
+ "webdriver_traits 0.0.1",
 ]
 
 [[package]]
@@ -834,6 +835,7 @@ dependencies = [
  "url 0.2.23 (registry+https://github.com/rust-lang/crates.io-index)",
  "util 0.0.1",
  "uuid 0.1.11 (git+https://github.com/rust-lang/uuid)",
+ "webdriver_traits 0.0.1",
 ]
 
 [[package]]
@@ -847,6 +849,7 @@ dependencies = [
  "net_traits 0.0.1",
  "url 0.2.23 (registry+https://github.com/rust-lang/crates.io-index)",
  "util 0.0.1",
+ "webdriver_traits 0.0.1",
 ]
 
 [[package]]
@@ -1022,7 +1025,7 @@ dependencies = [
 [[package]]
 name = "webdriver"
 version = "0.0.1"
-source = "git+https://github.com/jgraham/webdriver-rust.git#4f543416a269b9d0d7ee5332db489768c2a769dd"
+source = "git+https://github.com/jgraham/webdriver-rust.git#fa625e3cf8fdb39b503c1cc902506df3a1d1c9de"
 dependencies = [
  "hyper 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1041,6 +1044,14 @@ dependencies = [
  "util 0.0.1",
  "uuid 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "webdriver 0.0.1 (git+https://github.com/jgraham/webdriver-rust.git)",
+ "webdriver_traits 0.0.1",
+]
+
+[[package]]
+name = "webdriver_traits"
+version = "0.0.1"
+dependencies = [
+ "rustc-serialize 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
diff --git a/servo/ports/gonk/Cargo.lock b/servo/ports/gonk/Cargo.lock
index 0f29369ed46c..492a3b92ce69 100644
--- a/servo/ports/gonk/Cargo.lock
+++ b/servo/ports/gonk/Cargo.lock
@@ -119,7 +119,7 @@ dependencies = [
  "time 0.1.19 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 0.2.23 (registry+https://github.com/rust-lang/crates.io-index)",
  "util 0.0.1",
- "webdriver_server 0.0.1",
+ "webdriver_traits 0.0.1",
 ]
 
 [[package]]
@@ -634,6 +634,7 @@ dependencies = [
  "style 0.0.1",
  "url 0.2.23 (registry+https://github.com/rust-lang/crates.io-index)",
  "util 0.0.1",
+ "webdriver_traits 0.0.1",
 ]
 
 [[package]]
@@ -826,6 +827,7 @@ dependencies = [
  "url 0.2.23 (registry+https://github.com/rust-lang/crates.io-index)",
  "util 0.0.1",
  "uuid 0.1.11 (git+https://github.com/rust-lang/uuid)",
+ "webdriver_traits 0.0.1",
 ]
 
 [[package]]
@@ -839,6 +841,7 @@ dependencies = [
  "net_traits 0.0.1",
  "url 0.2.23 (registry+https://github.com/rust-lang/crates.io-index)",
  "util 0.0.1",
+ "webdriver_traits 0.0.1",
 ]
 
 [[package]]
@@ -1013,7 +1016,7 @@ dependencies = [
 [[package]]
 name = "webdriver"
 version = "0.0.1"
-source = "git+https://github.com/jgraham/webdriver-rust.git#4f543416a269b9d0d7ee5332db489768c2a769dd"
+source = "git+https://github.com/jgraham/webdriver-rust.git#fa625e3cf8fdb39b503c1cc902506df3a1d1c9de"
 dependencies = [
  "hyper 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1032,6 +1035,14 @@ dependencies = [
  "util 0.0.1",
  "uuid 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "webdriver 0.0.1 (git+https://github.com/jgraham/webdriver-rust.git)",
+ "webdriver_traits 0.0.1",
+]
+
+[[package]]
+name = "webdriver_traits"
+version = "0.0.1"
+dependencies = [
+ "rustc-serialize 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]