diff --git a/src/compiletest/errors.rs b/src/compiletest/errors.rs
index 9dde2f86f96cd924a0ed0ffc44d9d743018683ec..b517183df5cc22ebc2714a848acb74ad6fc72c3f 100644
--- a/src/compiletest/errors.rs
+++ b/src/compiletest/errors.rs
@@ -1,4 +1,5 @@
 import common::config;
+import io::ReaderUtil;
 
 export load_errors;
 export expected_error;
diff --git a/src/compiletest/header.rs b/src/compiletest/header.rs
index 2905537d6a186f85cfe81f4c82dda8f8cbc45689..6767a3c70f85ede6111b9707fb2d5cac2c3b9db3 100644
--- a/src/compiletest/header.rs
+++ b/src/compiletest/header.rs
@@ -2,6 +2,7 @@
 import str;
 
 import common::config;
+import io::ReaderUtil;
 
 export test_props;
 export load_props;
diff --git a/src/compiletest/procsrv.rs b/src/compiletest/procsrv.rs
index bd9f8f4385f5b0589c0d4b0e0aac22858510bc25..8d7fd194330657386a3d52abb715850e7d50399f 100644
--- a/src/compiletest/procsrv.rs
+++ b/src/compiletest/procsrv.rs
@@ -1,7 +1,6 @@
 import run::spawn_process;
-import io::WriterUtil;
+import io::{ReaderUtil, WriterUtil};
 import libc::{c_int, pid_t};
-
 import pipes::chan;
 
 export run;
diff --git a/src/test/bench/core-std.rs b/src/test/bench/core-std.rs
index 21525424b1bcd2f16137acb770afac8ec997f57e..6b5e02b24a695c4a333ef7d5110842982126d7f1 100644
--- a/src/test/bench/core-std.rs
+++ b/src/test/bench/core-std.rs
@@ -6,7 +6,7 @@
 import std::map;
 import std::map::{map, hashmap};
 
-import io::Reader;
+import io::{Reader, ReaderUtil};
 
 fn main(argv: ~[~str]) {
     #macro[
diff --git a/src/test/bench/shootout-k-nucleotide-pipes.rs b/src/test/bench/shootout-k-nucleotide-pipes.rs
index 4204a3110de8339814715e6fc51d70741c52a8ce..dbef8f0b69305e07010e411583d863669aa8abea 100644
--- a/src/test/bench/shootout-k-nucleotide-pipes.rs
+++ b/src/test/bench/shootout-k-nucleotide-pipes.rs
@@ -6,7 +6,7 @@
 import std::map;
 import std::map::hashmap;
 import std::sort;
-
+import io::ReaderUtil;
 import pipes::{stream, port, chan};
 
 // given a map, print a sorted version of it
diff --git a/src/test/bench/shootout-k-nucleotide.rs b/src/test/bench/shootout-k-nucleotide.rs
index 54ff0cde9ef961be0fbe879c2aecddeefe5546df..5feb561abe4dd9b0ecd55274bf554f076c6053ee 100644
--- a/src/test/bench/shootout-k-nucleotide.rs
+++ b/src/test/bench/shootout-k-nucleotide.rs
@@ -6,6 +6,7 @@
 import std::map;
 import std::map::hashmap;
 import std::sort;
+import io::ReaderUtil;
 
 // given a map, print a sorted version of it
 fn sort_and_fmt(mm: hashmap<~[u8], uint>, total: uint) -> ~str { 
diff --git a/src/test/bench/sudoku.rs b/src/test/bench/sudoku.rs
index ef7442b22f2cf330480301a300e09fa6585856b4..113c31ef532b7c646cbc6c81635db2583c57955d 100644
--- a/src/test/bench/sudoku.rs
+++ b/src/test/bench/sudoku.rs
@@ -1,7 +1,7 @@
 use std;
 
 import std::bitv;
-import io::WriterUtil;
+import io::{ReaderUtil, WriterUtil};
 
 // Computes a single solution to a given 9x9 sudoku
 //