diff --git a/src/servo/gfx/pngsink.rs b/src/servo/gfx/pngsink.rs
index 4dc602e01c1..634f44a124e 100644
--- a/src/servo/gfx/pngsink.rs
+++ b/src/servo/gfx/pngsink.rs
@@ -24,6 +24,8 @@ import unsafe::reinterpret_cast;
 import vec_from_buf = vec::unsafe::from_buf;
 import ptr::addr_of;
 import dom::event::Event;
+import dvec::dvec;
+import layout::display_list::display_list;
 
 type PngSink = chan<Msg>;
 
@@ -127,7 +129,7 @@ fn sanity_check() {
         let sink = PngSink(self_channel);
         let renderer = Renderer(sink);
 
-        let dlist = ~[];
+        let dlist : display_list = dvec();
         renderer.send(RenderMsg(dlist));
         listen(|from_renderer| {
             renderer.send(renderer::ExitMsg(from_renderer));
diff --git a/src/servo/layout/display_list_builder.rs b/src/servo/layout/display_list_builder.rs
index 259972aa5a9..fd764da2770 100644
--- a/src/servo/layout/display_list_builder.rs
+++ b/src/servo/layout/display_list_builder.rs
@@ -113,9 +113,10 @@ fn should_convert_text_boxes_to_solid_color_background_items() {
     let b = n.construct_boxes();
     let subbox = alt check b.kind { TextBox(subbox) { subbox } };
     b.reflow_text(px_to_au(800), subbox);
-    let di = box_to_display_items(b, Point2D(px_to_au(0), px_to_au(0)));
+    let list = dvec();
+    box_to_display_items(list, b, Point2D(px_to_au(0), px_to_au(0)));
 
-    alt di[0].item_type {
+    alt list[0].item_type {
       dl::display_item_solid_color(*) { }
       _ { fail }
     }
@@ -131,9 +132,10 @@ fn should_convert_text_boxes_to_text_items() {
     let b = n.construct_boxes();
     let subbox = alt check b.kind { TextBox(subbox) { subbox } };
     b.reflow_text(px_to_au(800), subbox);
-    let di = box_to_display_items(b, Point2D(px_to_au(0), px_to_au(0)));
+    let list = dvec();
+    box_to_display_items(list, b, Point2D(px_to_au(0), px_to_au(0)));
 
-    alt di[1].item_type {
+    alt list[1].item_type {
       dl::display_item_text(_) { }
       _ { fail }
     }
@@ -148,14 +150,15 @@ fn should_calculate_the_bounds_of_the_text_box_background_color() {
     let b = n.construct_boxes();
     let subbox = alt check b.kind { TextBox(subbox) { subbox } };
     b.reflow_text(px_to_au(800), subbox);
-    let di = box_to_display_items(b, Point2D(px_to_au(0), px_to_au(0)));
+    let list = dvec();
+    box_to_display_items(list, b, Point2D(px_to_au(0), px_to_au(0)));
 
     let expected = Rect(
         Point2D(px_to_au(0), px_to_au(0)),
         Size2D(px_to_au(84), px_to_au(20))
     );
 
-    assert di[0].bounds == expected;
+    assert list[0].bounds == expected;
 }
 
 fn should_calculate_the_bounds_of_the_text_items() {
@@ -167,12 +170,13 @@ fn should_calculate_the_bounds_of_the_text_items() {
     let b = n.construct_boxes();
     let subbox = alt check b.kind { TextBox(subbox) { subbox } };
     b.reflow_text(px_to_au(800), subbox);
-    let di = box_to_display_items(b, Point2D(px_to_au(0), px_to_au(0)));
+    let list = dvec();
+    box_to_display_items(list, b, Point2D(px_to_au(0), px_to_au(0)));
 
     let expected = Rect(
         Point2D(px_to_au(0), px_to_au(0)),
         Size2D(px_to_au(84), px_to_au(20))
     );
 
-    assert di[1].bounds == expected;
+    assert list[1].bounds == expected;
 }