diff --git a/components/net/resource_task.rs b/components/net/resource_task.rs
index 70c0ec71a4b..1ccd09d6219 100644
--- a/components/net/resource_task.rs
+++ b/components/net/resource_task.rs
@@ -250,7 +250,7 @@ impl ResourceChannelManager {
     }
 }
 
-struct ResourceManager {
+pub struct ResourceManager {
     user_agent: Option<String>,
     cookie_storage: CookieStorage,
     resource_task: IpcSender<ControlMsg>,
@@ -260,10 +260,10 @@ struct ResourceManager {
 }
 
 impl ResourceManager {
-    fn new(user_agent: Option<String>,
-           resource_task: IpcSender<ControlMsg>,
-           hsts_list: HSTSList,
-           devtools_channel: Option<Sender<DevtoolsControlMsg>>) -> ResourceManager {
+    pub fn new(user_agent: Option<String>,
+               resource_task: IpcSender<ControlMsg>,
+               hsts_list: HSTSList,
+               devtools_channel: Option<Sender<DevtoolsControlMsg>>) -> ResourceManager {
         ResourceManager {
             user_agent: user_agent,
             cookie_storage: CookieStorage::new(),
diff --git a/components/net_traits/Cargo.toml b/components/net_traits/Cargo.toml
index fbed03472d3..5ca00f82ce5 100644
--- a/components/net_traits/Cargo.toml
+++ b/components/net_traits/Cargo.toml
@@ -24,10 +24,6 @@ git = "https://github.com/servo/rust-stb-image"
 version = "0.6"
 features = [ "serde-serialization" ]
 
-[dependencies.url]
-version = "0.2.36"
-features = [ "serde_serialization" ]
-
 [dependencies.ipc-channel]
 git = "https://github.com/pcwalton/ipc-channel"
 
diff --git a/components/script/dom/bindings/trace.rs b/components/script/dom/bindings/trace.rs
index 258d53dc6bc..770515cce40 100644
--- a/components/script/dom/bindings/trace.rs
+++ b/components/script/dom/bindings/trace.rs
@@ -65,7 +65,6 @@ use net_traits::image::base::Image;
 use profile_traits::mem::ProfilerChan;
 use util::str::{LengthOrPercentageOrAuto};
 use selectors::parser::PseudoElement;
-use serde::{Deserialize, Serialize};
 use std::cell::{Cell, UnsafeCell, RefCell};
 use std::collections::{HashMap, HashSet};
 use std::collections::hash_state::HashState;
@@ -357,6 +356,13 @@ impl JSTraceable for Box<LayoutRPC+'static> {
     }
 }
 
+impl JSTraceable for () {
+    #[inline]
+    fn trace(&self, _: *mut JSTracer) {
+        // Do nothing
+    }
+}
+
 impl<T> JSTraceable for IpcReceiver<T> where T: Deserialize + Serialize {
     #[inline]
     fn trace(&self, _: *mut JSTracer) {
diff --git a/tests/unit/net/hsts.rs b/tests/unit/net/hsts.rs
index 56deee0927f..7ac11d4dbc3 100644
--- a/tests/unit/net/hsts.rs
+++ b/tests/unit/net/hsts.rs
@@ -7,6 +7,7 @@ use net::hsts::HSTSEntry;
 use net_traits::IncludeSubdomains;
 use net::hsts::{secure_url, preload_hsts_domains};
 use net::resource_task::ResourceManager;
+use ipc_channel::ipc;
 use std::sync::mpsc::channel;
 use url::Url;
 use time;
@@ -17,7 +18,7 @@ fn test_add_hsts_entry_to_resource_manager_adds_an_hsts_entry() {
         entries: Vec::new()
     };
 
-    let (tx, _) = channel();
+    let (tx, _) = ipc::channel().unwrap();
     let mut manager = ResourceManager::new(None, tx, list, None);
 
     let entry = HSTSEntry::new(