diff --git a/src/components/net/file_loader.rs b/src/components/net/file_loader.rs
index 917d1ebc12c..0b8d5240bc2 100644
--- a/src/components/net/file_loader.rs
+++ b/src/components/net/file_loader.rs
@@ -8,7 +8,8 @@ use std::io;
 use std::io::File;
 use servo_util::task::spawn_named;
 
-static READ_SIZE: uint = 1024;
+//FIXME: https://github.com/mozilla/rust/issues/12892
+static READ_SIZE: uint = 1;
 
 fn read_all(reader: &mut io::Stream, progress_chan: &Chan<ProgressMsg>)
         -> Result<(), ()> {
diff --git a/src/test/content/test_document_body.html b/src/test/content/test_document_body.html
index 09bb8daf9aa..e10447bc588 100644
--- a/src/test/content/test_document_body.html
+++ b/src/test/content/test_document_body.html
@@ -35,7 +35,9 @@
 
                 is_not(new_div, null, "test4-0, append an invalid element to a new document");
 
-                new_document.body = new_div;
+                should_throw(function() {
+                  new_document.body = new_div;
+                });
                 is(new_document.body, null, "test4-1, append an invalid element to a new document");
             }