diff --git a/src/libstd/ascii.rs b/src/libstd/ascii.rs
index 070d7ca1eef..a063b856468 100644
--- a/src/libstd/ascii.rs
+++ b/src/libstd/ascii.rs
@@ -12,8 +12,6 @@
 
 #![stable(feature = "rust1", since = "1.0.0")]
 
-use prelude::v1::*;
-
 use mem;
 use ops::Range;
 use iter::FusedIterator;
@@ -454,7 +452,6 @@ static ASCII_UPPERCASE_MAP: [u8; 256] = [
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
     use super::*;
     use char::from_u32;
 
diff --git a/src/libstd/collections/hash/map.rs b/src/libstd/collections/hash/map.rs
index ba27fafa59a..14da36ca483 100644
--- a/src/libstd/collections/hash/map.rs
+++ b/src/libstd/collections/hash/map.rs
@@ -2059,8 +2059,6 @@ fn assert_covariance() {
 
 #[cfg(test)]
 mod test_map {
-    use prelude::v1::*;
-
     use super::HashMap;
     use super::Entry::{Occupied, Vacant};
     use cell::RefCell;
diff --git a/src/libstd/collections/hash/set.rs b/src/libstd/collections/hash/set.rs
index 96efff86abf..ca5137e9573 100644
--- a/src/libstd/collections/hash/set.rs
+++ b/src/libstd/collections/hash/set.rs
@@ -1067,8 +1067,6 @@ fn assert_covariance() {
 
 #[cfg(test)]
 mod test_set {
-    use prelude::v1::*;
-
     use super::HashSet;
 
     #[test]
diff --git a/src/libstd/env.rs b/src/libstd/env.rs
index 753411991ab..7a94c396218 100644
--- a/src/libstd/env.rs
+++ b/src/libstd/env.rs
@@ -16,8 +16,6 @@
 
 #![stable(feature = "env", since = "1.0.0")]
 
-use prelude::v1::*;
-
 use error::Error;
 use ffi::{OsStr, OsString};
 use fmt;
@@ -950,7 +948,6 @@ mod arch {
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
     use super::*;
 
     use iter::repeat;
diff --git a/src/libstd/error.rs b/src/libstd/error.rs
index 914599271ac..44595361fb5 100644
--- a/src/libstd/error.rs
+++ b/src/libstd/error.rs
@@ -48,16 +48,15 @@
 // reconsider what crate these items belong in.
 
 use any::TypeId;
-use boxed::Box;
 use cell;
 use char;
 use fmt::{self, Debug, Display};
-use marker::{Send, Sync, Reflect};
+use marker::Reflect;
 use mem::transmute;
 use num;
 use raw::TraitObject;
 use str;
-use string::{self, String};
+use string;
 
 /// Base functionality for all errors in Rust.
 #[stable(feature = "rust1", since = "1.0.0")]
@@ -454,7 +453,6 @@ impl Error + Send + Sync {
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
     use super::Error;
     use fmt;
 
diff --git a/src/libstd/ffi/c_str.rs b/src/libstd/ffi/c_str.rs
index 5dae1a09bf4..38222c014f6 100644
--- a/src/libstd/ffi/c_str.rs
+++ b/src/libstd/ffi/c_str.rs
@@ -9,25 +9,18 @@
 // except according to those terms.
 
 use ascii;
-use borrow::{Cow, ToOwned, Borrow};
-use boxed::Box;
-use convert::{Into, From};
-use cmp::{PartialEq, Eq, PartialOrd, Ord, Ordering};
+use borrow::{Cow, Borrow};
+use cmp::Ordering;
 use error::Error;
 use fmt::{self, Write};
 use io;
-use iter::Iterator;
 use libc;
 use mem;
 use memchr;
 use ops;
-use option::Option::{self, Some, None};
 use os::raw::c_char;
-use result::Result::{self, Ok, Err};
 use slice;
 use str::{self, Utf8Error};
-use string::String;
-use vec::Vec;
 
 /// A type representing an owned C-compatible string
 ///
@@ -700,7 +693,6 @@ impl AsRef<CStr> for CString {
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
     use super::*;
     use os::raw::c_char;
     use borrow::Cow::{Borrowed, Owned};
diff --git a/src/libstd/ffi/os_str.rs b/src/libstd/ffi/os_str.rs
index 3d23a9a2383..36cf4ef758d 100644
--- a/src/libstd/ffi/os_str.rs
+++ b/src/libstd/ffi/os_str.rs
@@ -8,14 +8,12 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use borrow::{Borrow, Cow, ToOwned};
+use borrow::{Borrow, Cow};
 use fmt::{self, Debug};
 use mem;
-use string::String;
 use ops;
 use cmp;
 use hash::{Hash, Hasher};
-use vec::Vec;
 
 use sys::os_str::{Buf, Slice};
 use sys_common::{AsInner, IntoInner, FromInner};
diff --git a/src/libstd/fs.rs b/src/libstd/fs.rs
index b78db24e44b..f2374e722c1 100644
--- a/src/libstd/fs.rs
+++ b/src/libstd/fs.rs
@@ -23,7 +23,6 @@ use io::{self, SeekFrom, Seek, Read, Write};
 use path::{Path, PathBuf};
 use sys::fs as fs_imp;
 use sys_common::{AsInnerMut, FromInner, AsInner, IntoInner};
-use vec::Vec;
 use time::SystemTime;
 
 /// A reference to an open file on the filesystem.
@@ -1677,7 +1676,6 @@ impl AsInnerMut<fs_imp::DirBuilder> for DirBuilder {
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
     use io::prelude::*;
 
     use fs::{self, File, OpenOptions};
diff --git a/src/libstd/io/buffered.rs b/src/libstd/io/buffered.rs
index a92ca95f4ee..a26a932ad2d 100644
--- a/src/libstd/io/buffered.rs
+++ b/src/libstd/io/buffered.rs
@@ -10,7 +10,6 @@
 
 //! Buffering wrappers for I/O traits
 
-use prelude::v1::*;
 use io::prelude::*;
 
 use marker::Reflect;
@@ -788,7 +787,6 @@ impl<W: Write> fmt::Debug for LineWriter<W> where W: fmt::Debug {
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
     use io::prelude::*;
     use io::{self, BufReader, BufWriter, LineWriter, SeekFrom};
     use sync::atomic::{AtomicUsize, Ordering};
diff --git a/src/libstd/io/cursor.rs b/src/libstd/io/cursor.rs
index 2d780559db1..1b836b74537 100644
--- a/src/libstd/io/cursor.rs
+++ b/src/libstd/io/cursor.rs
@@ -8,7 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use prelude::v1::*;
 use io::prelude::*;
 
 use cmp;
@@ -284,7 +283,6 @@ impl Write for Cursor<Box<[u8]>> {
 mod tests {
     use io::prelude::*;
     use io::{Cursor, SeekFrom};
-    use vec::Vec;
 
     #[test]
     fn test_vec_writer() {
diff --git a/src/libstd/io/error.rs b/src/libstd/io/error.rs
index 5333b0a531e..d90be2e08a9 100644
--- a/src/libstd/io/error.rs
+++ b/src/libstd/io/error.rs
@@ -8,12 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use boxed::Box;
-use convert::Into;
 use error;
 use fmt;
-use marker::{Send, Sync};
-use option::Option::{self, Some, None};
 use result;
 use sys;
 
@@ -522,7 +518,6 @@ fn _assert_error_is_sync_send() {
 
 #[cfg(test)]
 mod test {
-    use prelude::v1::*;
     use super::{Error, ErrorKind};
     use error;
     use fmt;
diff --git a/src/libstd/io/impls.rs b/src/libstd/io/impls.rs
index 31799381563..cd05e6b5de9 100644
--- a/src/libstd/io/impls.rs
+++ b/src/libstd/io/impls.rs
@@ -8,13 +8,10 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use boxed::Box;
 use cmp;
 use io::{self, SeekFrom, Read, Write, Seek, BufRead, Error, ErrorKind};
 use fmt;
 use mem;
-use string::String;
-use vec::Vec;
 
 // =============================================================================
 // Forwarding implementations
@@ -228,7 +225,6 @@ impl Write for Vec<u8> {
 #[cfg(test)]
 mod tests {
     use io::prelude::*;
-    use vec::Vec;
     use test;
 
     #[bench]
diff --git a/src/libstd/io/lazy.rs b/src/libstd/io/lazy.rs
index 11551601207..ce205c3b11c 100644
--- a/src/libstd/io/lazy.rs
+++ b/src/libstd/io/lazy.rs
@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use prelude::v1::*;
-
 use cell::Cell;
 use ptr;
 use sync::Arc;
diff --git a/src/libstd/io/mod.rs b/src/libstd/io/mod.rs
index 307d014fd68..1053792cd43 100644
--- a/src/libstd/io/mod.rs
+++ b/src/libstd/io/mod.rs
@@ -253,15 +253,8 @@ use cmp;
 use rustc_unicode::str as core_str;
 use error as std_error;
 use fmt;
-use iter::{Iterator};
-use marker::Sized;
-use ops::{Drop, FnOnce};
-use option::Option::{self, Some, None};
-use result::Result::{Ok, Err};
 use result;
-use string::String;
 use str;
-use vec::Vec;
 use memchr;
 
 #[stable(feature = "rust1", since = "1.0.0")]
@@ -1734,7 +1727,6 @@ impl<B: BufRead> Iterator for Lines<B> {
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
     use io::prelude::*;
     use io;
     use super::Cursor;
diff --git a/src/libstd/io/stdio.rs b/src/libstd/io/stdio.rs
index b8b66a58359..9a782e95f6e 100644
--- a/src/libstd/io/stdio.rs
+++ b/src/libstd/io/stdio.rs
@@ -8,7 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use prelude::v1::*;
 use io::prelude::*;
 
 use cell::{RefCell, BorrowState};
diff --git a/src/libstd/io/util.rs b/src/libstd/io/util.rs
index c8b52fc0467..2c6880281b5 100644
--- a/src/libstd/io/util.rs
+++ b/src/libstd/io/util.rs
@@ -167,8 +167,6 @@ impl Write for Sink {
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
-
     use io::prelude::*;
     use io::{copy, sink, empty, repeat};
 
diff --git a/src/libstd/lib.rs b/src/libstd/lib.rs
index d4644a190f4..9a8cd0c712f 100644
--- a/src/libstd/lib.rs
+++ b/src/libstd/lib.rs
@@ -252,6 +252,7 @@
 #![feature(optin_builtin_traits)]
 #![feature(panic_unwind)]
 #![feature(placement_in_syntax)]
+#![feature(prelude_import)]
 #![feature(question_mark)]
 #![feature(rand)]
 #![feature(raw)]
@@ -292,6 +293,10 @@
 #![allow(unused_features)] // std may use features in a platform-specific way
 #![cfg_attr(not(stage0), deny(warnings))]
 
+#[prelude_import]
+#[allow(unused)]
+use prelude::v1::*;
+
 #[cfg(test)] extern crate test;
 
 // We want to reexport a few macros from core but libcore has already been
diff --git a/src/libstd/net/addr.rs b/src/libstd/net/addr.rs
index b93ca8277e6..d0b59b42c17 100644
--- a/src/libstd/net/addr.rs
+++ b/src/libstd/net/addr.rs
@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use prelude::v1::*;
-
 use fmt;
 use hash;
 use io;
@@ -523,7 +521,6 @@ impl<'a, T: ToSocketAddrs + ?Sized> ToSocketAddrs for &'a T {
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
     use net::*;
     use net::test::{tsa, sa6, sa4};
 
diff --git a/src/libstd/net/ip.rs b/src/libstd/net/ip.rs
index 4c3b993497c..c6a7a77e68a 100644
--- a/src/libstd/net/ip.rs
+++ b/src/libstd/net/ip.rs
@@ -653,7 +653,6 @@ impl From<[u8; 16]> for Ipv6Addr {
 // Tests for this module
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
     use net::*;
     use net::Ipv6MulticastScope::*;
     use net::test::{tsa, sa6, sa4};
diff --git a/src/libstd/net/mod.rs b/src/libstd/net/mod.rs
index 11a16b27113..2a78afa85f7 100644
--- a/src/libstd/net/mod.rs
+++ b/src/libstd/net/mod.rs
@@ -12,8 +12,6 @@
 
 #![stable(feature = "rust1", since = "1.0.0")]
 
-use prelude::v1::*;
-
 use io::{self, Error, ErrorKind};
 use sys_common::net as net_imp;
 
diff --git a/src/libstd/net/parser.rs b/src/libstd/net/parser.rs
index 5851ce7135d..854d87c4cbe 100644
--- a/src/libstd/net/parser.rs
+++ b/src/libstd/net/parser.rs
@@ -13,8 +13,6 @@
 //! This module is "publicly exported" through the `FromStr` implementations
 //! below.
 
-use prelude::v1::*;
-
 use error::Error;
 use fmt;
 use net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr, SocketAddrV4, SocketAddrV6};
diff --git a/src/libstd/net/tcp.rs b/src/libstd/net/tcp.rs
index 76617f15970..dcd3652af87 100644
--- a/src/libstd/net/tcp.rs
+++ b/src/libstd/net/tcp.rs
@@ -8,7 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use prelude::v1::*;
 use io::prelude::*;
 
 use fmt;
@@ -438,8 +437,6 @@ impl fmt::Debug for TcpListener {
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
-
     use io::ErrorKind;
     use io::prelude::*;
     use net::*;
diff --git a/src/libstd/net/test.rs b/src/libstd/net/test.rs
index 9665fd72287..98ac61f6461 100644
--- a/src/libstd/net/test.rs
+++ b/src/libstd/net/test.rs
@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use prelude::v1::*;
-
 use env;
 use net::{SocketAddr, SocketAddrV4, SocketAddrV6, Ipv4Addr, Ipv6Addr, ToSocketAddrs};
 use sync::atomic::{AtomicUsize, Ordering};
diff --git a/src/libstd/net/udp.rs b/src/libstd/net/udp.rs
index 9d0279deb1b..781f026c12c 100644
--- a/src/libstd/net/udp.rs
+++ b/src/libstd/net/udp.rs
@@ -355,8 +355,6 @@ impl fmt::Debug for UdpSocket {
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
-
     use io::ErrorKind;
     use net::*;
     use net::test::{next_test_ip4, next_test_ip6};
diff --git a/src/libstd/num/mod.rs b/src/libstd/num/mod.rs
index 20804d62dfa..d1c2fc3d3fc 100644
--- a/src/libstd/num/mod.rs
+++ b/src/libstd/num/mod.rs
@@ -24,9 +24,7 @@ pub use core::num::{FpCategory, ParseIntError, ParseFloatError, TryFromIntError}
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::num::Wrapping;
 
-#[cfg(test)] use cmp::PartialEq;
 #[cfg(test)] use fmt;
-#[cfg(test)] use marker::Copy;
 #[cfg(test)] use ops::{Add, Sub, Mul, Div, Rem};
 
 /// Helper function for testing numeric operations
@@ -52,7 +50,6 @@ mod tests {
     use u32;
     use u64;
     use usize;
-    use string::ToString;
     use ops::Mul;
 
     #[test]
@@ -287,7 +284,6 @@ mod tests {
 mod bench {
     extern crate test;
     use self::test::Bencher;
-    use prelude::v1::*;
 
     #[bench]
     fn bench_pow_function(b: &mut Bencher) {
diff --git a/src/libstd/panic.rs b/src/libstd/panic.rs
index 2f67081e0d7..47f594a9b0c 100644
--- a/src/libstd/panic.rs
+++ b/src/libstd/panic.rs
@@ -13,7 +13,6 @@
 #![stable(feature = "std_panic", since = "1.9.0")]
 
 use any::Any;
-use boxed::Box;
 use cell::UnsafeCell;
 use ops::{Deref, DerefMut};
 use panicking;
diff --git a/src/libstd/panicking.rs b/src/libstd/panicking.rs
index 5961fd59699..0c10dcbdad6 100644
--- a/src/libstd/panicking.rs
+++ b/src/libstd/panicking.rs
@@ -17,7 +17,6 @@
 //! * Executing a panic up to doing the actual implementation
 //! * Shims around "try"
 
-use prelude::v1::*;
 use io::prelude::*;
 
 use any::Any;
diff --git a/src/libstd/path.rs b/src/libstd/path.rs
index bc8fd66a438..67219b6fd1b 100644
--- a/src/libstd/path.rs
+++ b/src/libstd/path.rs
@@ -100,7 +100,7 @@
 #![stable(feature = "rust1", since = "1.0.0")]
 
 use ascii::*;
-use borrow::{Borrow, ToOwned, Cow};
+use borrow::{Borrow, Cow};
 use cmp;
 use error::Error;
 use fmt;
@@ -110,8 +110,6 @@ use io;
 use iter::{self, FusedIterator};
 use mem;
 use ops::{self, Deref};
-use string::String;
-use vec::Vec;
 
 use ffi::{OsStr, OsString};
 
@@ -2152,8 +2150,6 @@ impl Error for StripPrefixError {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use string::{ToString, String};
-    use vec::Vec;
 
     macro_rules! t(
         ($path:expr, iter: $iter:expr) => (
diff --git a/src/libstd/process.rs b/src/libstd/process.rs
index 660c098d30b..f0c44430700 100644
--- a/src/libstd/process.rs
+++ b/src/libstd/process.rs
@@ -12,7 +12,6 @@
 
 #![stable(feature = "process", since = "1.0.0")]
 
-use prelude::v1::*;
 use io::prelude::*;
 
 use ffi::OsStr;
@@ -810,7 +809,6 @@ pub fn exit(code: i32) -> ! {
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
     use io::prelude::*;
 
     use io::ErrorKind;
diff --git a/src/libstd/rt.rs b/src/libstd/rt.rs
index a3d9e4db7d1..e3de1efaa31 100644
--- a/src/libstd/rt.rs
+++ b/src/libstd/rt.rs
@@ -30,7 +30,6 @@ pub use panicking::{begin_panic, begin_panic_fmt, update_panic_count};
 #[cfg(not(test))]
 #[lang = "start"]
 fn lang_start(main: *const u8, argc: isize, argv: *const *const u8) -> isize {
-    use borrow::ToOwned;
     use mem;
     use panic;
     use sys;
diff --git a/src/libstd/sync/barrier.rs b/src/libstd/sync/barrier.rs
index b1267acdee6..ac0f400379e 100644
--- a/src/libstd/sync/barrier.rs
+++ b/src/libstd/sync/barrier.rs
@@ -113,8 +113,6 @@ impl BarrierWaitResult {
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
-
     use sync::{Arc, Barrier};
     use sync::mpsc::{channel, TryRecvError};
     use thread;
diff --git a/src/libstd/sync/condvar.rs b/src/libstd/sync/condvar.rs
index 3c52ebc72f2..1f480f6d4a9 100644
--- a/src/libstd/sync/condvar.rs
+++ b/src/libstd/sync/condvar.rs
@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use prelude::v1::*;
-
 use sync::atomic::{AtomicUsize, Ordering};
 use sync::{mutex, MutexGuard, PoisonError};
 use sys_common::condvar as sys;
@@ -245,8 +243,6 @@ impl Drop for Condvar {
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
-
     use sync::mpsc::channel;
     use sync::{Condvar, Mutex, Arc};
     use thread;
diff --git a/src/libstd/sync/mpsc/blocking.rs b/src/libstd/sync/mpsc/blocking.rs
index 4a70de0e7d8..0f9ef6fabb0 100644
--- a/src/libstd/sync/mpsc/blocking.rs
+++ b/src/libstd/sync/mpsc/blocking.rs
@@ -13,9 +13,7 @@
 use thread::{self, Thread};
 use sync::atomic::{AtomicBool, Ordering};
 use sync::Arc;
-use marker::{Sync, Send};
 use mem;
-use clone::Clone;
 use time::Instant;
 
 struct Inner {
diff --git a/src/libstd/sync/mpsc/mod.rs b/src/libstd/sync/mpsc/mod.rs
index d8b8c6a77a2..3d9f81413dc 100644
--- a/src/libstd/sync/mpsc/mod.rs
+++ b/src/libstd/sync/mpsc/mod.rs
@@ -1270,8 +1270,6 @@ impl error::Error for TryRecvError {
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
-
     use env;
     use super::*;
     use thread;
@@ -1946,8 +1944,6 @@ mod tests {
 
 #[cfg(test)]
 mod sync_tests {
-    use prelude::v1::*;
-
     use env;
     use thread;
     use super::*;
diff --git a/src/libstd/sync/mpsc/mpsc_queue.rs b/src/libstd/sync/mpsc/mpsc_queue.rs
index 6a6c19cfcc3..d926043fbbc 100644
--- a/src/libstd/sync/mpsc/mpsc_queue.rs
+++ b/src/libstd/sync/mpsc/mpsc_queue.rs
@@ -148,8 +148,6 @@ impl<T> Drop for Queue<T> {
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
-
     use sync::mpsc::channel;
     use super::{Queue, Data, Empty, Inconsistent};
     use sync::Arc;
diff --git a/src/libstd/sync/mpsc/select.rs b/src/libstd/sync/mpsc/select.rs
index 5aa4ce81b8a..677544d335e 100644
--- a/src/libstd/sync/mpsc/select.rs
+++ b/src/libstd/sync/mpsc/select.rs
@@ -369,8 +369,6 @@ impl<'rx, T:Send+'rx> fmt::Debug for Handle<'rx, T> {
 #[cfg(test)]
 #[allow(unused_imports)]
 mod tests {
-    use prelude::v1::*;
-
     use thread;
     use sync::mpsc::*;
 
diff --git a/src/libstd/sync/mpsc/spsc_queue.rs b/src/libstd/sync/mpsc/spsc_queue.rs
index 02506e7c2f3..724d7b1be73 100644
--- a/src/libstd/sync/mpsc/spsc_queue.rs
+++ b/src/libstd/sync/mpsc/spsc_queue.rs
@@ -233,8 +233,6 @@ impl<T> Drop for Queue<T> {
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
-
     use sync::Arc;
     use super::Queue;
     use thread;
diff --git a/src/libstd/sync/mpsc/sync.rs b/src/libstd/sync/mpsc/sync.rs
index 9d13a71ff95..9985daaba8f 100644
--- a/src/libstd/sync/mpsc/sync.rs
+++ b/src/libstd/sync/mpsc/sync.rs
@@ -36,7 +36,6 @@
 pub use self::Failure::*;
 use self::Blocker::*;
 
-use vec::Vec;
 use core::mem;
 use core::ptr;
 
diff --git a/src/libstd/sync/mutex.rs b/src/libstd/sync/mutex.rs
index 6bc458397f1..c8ae88c2331 100644
--- a/src/libstd/sync/mutex.rs
+++ b/src/libstd/sync/mutex.rs
@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use prelude::v1::*;
-
 use cell::UnsafeCell;
 use fmt;
 use marker;
@@ -355,8 +353,6 @@ pub fn guard_poison<'a, T: ?Sized>(guard: &MutexGuard<'a, T>) -> &'a poison::Fla
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
-
     use sync::mpsc::channel;
     use sync::{Arc, Mutex, Condvar};
     use sync::atomic::{AtomicUsize, Ordering};
diff --git a/src/libstd/sync/once.rs b/src/libstd/sync/once.rs
index 54c1fe6c564..86d2986959c 100644
--- a/src/libstd/sync/once.rs
+++ b/src/libstd/sync/once.rs
@@ -369,8 +369,6 @@ impl OnceState {
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
-
     use panic;
     use sync::mpsc::channel;
     use thread;
diff --git a/src/libstd/sync/rwlock.rs b/src/libstd/sync/rwlock.rs
index 65b5686de86..4801bcffd08 100644
--- a/src/libstd/sync/rwlock.rs
+++ b/src/libstd/sync/rwlock.rs
@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use prelude::v1::*;
-
 use cell::UnsafeCell;
 use fmt;
 use marker;
@@ -385,8 +383,6 @@ impl<'a, T: ?Sized> Drop for RwLockWriteGuard<'a, T> {
 mod tests {
     #![allow(deprecated)] // rand
 
-    use prelude::v1::*;
-
     use rand::{self, Rng};
     use sync::mpsc::channel;
     use thread;
@@ -552,8 +548,6 @@ mod tests {
 
     #[test]
     fn test_rwlock_try_write() {
-        use mem::drop;
-
         let lock = RwLock::new(0isize);
         let read_guard = lock.read().unwrap();
 
diff --git a/src/libstd/sys/common/args.rs b/src/libstd/sys/common/args.rs
index e877391fb8b..fad2c277da4 100644
--- a/src/libstd/sys/common/args.rs
+++ b/src/libstd/sys/common/args.rs
@@ -21,8 +21,6 @@
 
 #![allow(dead_code)] // different code on OSX/linux/etc
 
-use vec::Vec;
-
 /// One-time global initialization.
 pub unsafe fn init(argc: isize, argv: *const *const u8) { imp::init(argc, argv) }
 
@@ -42,8 +40,6 @@ pub fn clone() -> Option<Vec<Vec<u8>>> { imp::clone() }
           target_os = "solaris",
           target_os = "emscripten"))]
 mod imp {
-    use prelude::v1::*;
-
     use libc::c_char;
     use mem;
     use ffi::CStr;
@@ -91,8 +87,6 @@ mod imp {
           target_os = "ios",
           target_os = "windows"))]
 mod imp {
-    use vec::Vec;
-
     pub unsafe fn init(_argc: isize, _argv: *const *const u8) {
     }
 
diff --git a/src/libstd/sys/common/at_exit_imp.rs b/src/libstd/sys/common/at_exit_imp.rs
index b2683750d67..ce6fd4cb075 100644
--- a/src/libstd/sys/common/at_exit_imp.rs
+++ b/src/libstd/sys/common/at_exit_imp.rs
@@ -13,10 +13,8 @@
 //! Documentation can be found on the `rt::at_exit` function.
 
 use alloc::boxed::FnBox;
-use boxed::Box;
 use ptr;
 use sys_common::mutex::Mutex;
-use vec::Vec;
 
 type Queue = Vec<Box<FnBox()>>;
 
diff --git a/src/libstd/sys/common/backtrace.rs b/src/libstd/sys/common/backtrace.rs
index 4c23ceb63f2..c1d1792363d 100644
--- a/src/libstd/sys/common/backtrace.rs
+++ b/src/libstd/sys/common/backtrace.rs
@@ -191,7 +191,6 @@ pub fn demangle(writer: &mut Write, s: &str) -> io::Result<()> {
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
     use sys_common;
     macro_rules! t { ($a:expr, $b:expr) => ({
         let mut m = Vec::new();
diff --git a/src/libstd/sys/common/io.rs b/src/libstd/sys/common/io.rs
index 7b08852ba51..3cd70eddb85 100644
--- a/src/libstd/sys/common/io.rs
+++ b/src/libstd/sys/common/io.rs
@@ -7,7 +7,6 @@
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
-use prelude::v1::*;
 use io;
 use io::ErrorKind;
 use io::Read;
@@ -53,7 +52,6 @@ pub unsafe fn read_to_end_uninitialized(r: &mut Read, buf: &mut Vec<u8>) -> io::
 
 #[cfg(test)]
 pub mod test {
-    use prelude::v1::*;
     use path::{Path, PathBuf};
     use env;
     use rand::{self, Rng};
@@ -93,7 +91,6 @@ pub mod test {
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
     use io::prelude::*;
     use super::*;
     use io;
diff --git a/src/libstd/sys/common/mod.rs b/src/libstd/sys/common/mod.rs
index a1f3f477b3a..d1ca6765107 100644
--- a/src/libstd/sys/common/mod.rs
+++ b/src/libstd/sys/common/mod.rs
@@ -10,7 +10,6 @@
 
 #![allow(missing_docs)]
 
-use boxed::Box;
 use sync::Once;
 use sys;
 
diff --git a/src/libstd/sys/common/mutex.rs b/src/libstd/sys/common/mutex.rs
index 7a2183c522f..d1a738770d3 100644
--- a/src/libstd/sys/common/mutex.rs
+++ b/src/libstd/sys/common/mutex.rs
@@ -8,7 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use marker::Sync;
 use sys::mutex as imp;
 
 /// An OS-based mutual exclusion lock.
diff --git a/src/libstd/sys/common/net.rs b/src/libstd/sys/common/net.rs
index 442618c55b3..a777cfe35e5 100644
--- a/src/libstd/sys/common/net.rs
+++ b/src/libstd/sys/common/net.rs
@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use prelude::v1::*;
-
 use cmp;
 use ffi::CString;
 use fmt;
@@ -608,8 +606,6 @@ impl fmt::Debug for UdpSocket {
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
-
     use super::*;
     use collections::HashMap;
 
diff --git a/src/libstd/sys/common/remutex.rs b/src/libstd/sys/common/remutex.rs
index 39d41042467..cbdeaad7f6b 100644
--- a/src/libstd/sys/common/remutex.rs
+++ b/src/libstd/sys/common/remutex.rs
@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use prelude::v1::*;
-
 use fmt;
 use marker;
 use ops::Deref;
@@ -160,7 +158,6 @@ impl<'a, T> Drop for ReentrantMutexGuard<'a, T> {
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
     use sys_common::remutex::{ReentrantMutex, ReentrantMutexGuard};
     use cell::RefCell;
     use sync::Arc;
diff --git a/src/libstd/sys/common/thread.rs b/src/libstd/sys/common/thread.rs
index 16f4f01bf39..3ee160da5fa 100644
--- a/src/libstd/sys/common/thread.rs
+++ b/src/libstd/sys/common/thread.rs
@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use prelude::v1::*;
-
 use alloc::boxed::FnBox;
 use libc;
 use sys::stack_overflow;
diff --git a/src/libstd/sys/common/thread_info.rs b/src/libstd/sys/common/thread_info.rs
index 0467c67167b..95d8b6cc951 100644
--- a/src/libstd/sys/common/thread_info.rs
+++ b/src/libstd/sys/common/thread_info.rs
@@ -11,7 +11,6 @@
 #![allow(dead_code)] // stack_guard isn't used right now on all platforms
 
 use cell::RefCell;
-use string::String;
 use thread::Thread;
 use thread::LocalKeyState;
 
diff --git a/src/libstd/sys/common/thread_local.rs b/src/libstd/sys/common/thread_local.rs
index 56885cdd56d..25a9d5720d9 100644
--- a/src/libstd/sys/common/thread_local.rs
+++ b/src/libstd/sys/common/thread_local.rs
@@ -233,7 +233,6 @@ impl Drop for Key {
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
     use super::{Key, StaticKey};
 
     fn assert_sync<T: Sync>() {}
diff --git a/src/libstd/sys/common/wtf8.rs b/src/libstd/sys/common/wtf8.rs
index c1b4f8a8c88..8d357aa78c9 100644
--- a/src/libstd/sys/common/wtf8.rs
+++ b/src/libstd/sys/common/wtf8.rs
@@ -37,9 +37,7 @@ use mem;
 use ops;
 use slice;
 use str;
-use string::String;
 use sys_common::AsInner;
-use vec::Vec;
 
 const UTF8_REPLACEMENT_CHARACTER: &'static [u8] = b"\xEF\xBF\xBD";
 
@@ -807,7 +805,6 @@ impl AsciiExt for Wtf8 {
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
     use borrow::Cow;
     use super::*;
 
diff --git a/src/libstd/sys/unix/ext/ffi.rs b/src/libstd/sys/unix/ext/ffi.rs
index 825e74cabde..d59b4fc0b70 100644
--- a/src/libstd/sys/unix/ext/ffi.rs
+++ b/src/libstd/sys/unix/ext/ffi.rs
@@ -14,7 +14,6 @@
 
 use ffi::{OsStr, OsString};
 use mem;
-use prelude::v1::*;
 use sys::os_str::Buf;
 use sys_common::{FromInner, IntoInner, AsInner};
 
diff --git a/src/libstd/sys/unix/ext/net.rs b/src/libstd/sys/unix/ext/net.rs
index a4564b9543b..3f93fce1935 100644
--- a/src/libstd/sys/unix/ext/net.rs
+++ b/src/libstd/sys/unix/ext/net.rs
@@ -14,7 +14,6 @@
 
 use libc;
 
-use prelude::v1::*;
 use ascii;
 use ffi::OsStr;
 use fmt;
@@ -789,7 +788,6 @@ impl IntoRawFd for UnixDatagram {
 
 #[cfg(test)]
 mod test {
-    use prelude::v1::*;
     use thread;
     use io;
     use io::prelude::*;
diff --git a/src/libstd/sys/unix/ext/process.rs b/src/libstd/sys/unix/ext/process.rs
index dd70ba2e490..5bd92f2eb57 100644
--- a/src/libstd/sys/unix/ext/process.rs
+++ b/src/libstd/sys/unix/ext/process.rs
@@ -12,8 +12,6 @@
 
 #![stable(feature = "rust1", since = "1.0.0")]
 
-use prelude::v1::*;
-
 use io;
 use os::unix::io::{FromRawFd, RawFd, AsRawFd, IntoRawFd};
 use process;
diff --git a/src/libstd/sys/unix/fd.rs b/src/libstd/sys/unix/fd.rs
index b99f4a2eacd..b2b1f16f20a 100644
--- a/src/libstd/sys/unix/fd.rs
+++ b/src/libstd/sys/unix/fd.rs
@@ -10,8 +10,6 @@
 
 #![unstable(reason = "not public", issue = "0", feature = "fd")]
 
-use prelude::v1::*;
-
 use io::{self, Read};
 use libc::{self, c_int, size_t, c_void};
 use mem;
diff --git a/src/libstd/sys/unix/fs.rs b/src/libstd/sys/unix/fs.rs
index 3b132744f70..e6fe3eb112a 100644
--- a/src/libstd/sys/unix/fs.rs
+++ b/src/libstd/sys/unix/fs.rs
@@ -8,7 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use prelude::v1::*;
 use os::unix::prelude::*;
 
 use ffi::{CString, CStr, OsString, OsStr};
@@ -534,7 +533,6 @@ impl fmt::Debug for File {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         #[cfg(target_os = "linux")]
         fn get_path(fd: c_int) -> Option<PathBuf> {
-            use string::ToString;
             let mut p = PathBuf::from("/proc/self/fd");
             p.push(&fd.to_string());
             readlink(&p).ok()
diff --git a/src/libstd/sys/unix/net.rs b/src/libstd/sys/unix/net.rs
index 6f1b70acb60..3f77abd7f44 100644
--- a/src/libstd/sys/unix/net.rs
+++ b/src/libstd/sys/unix/net.rs
@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use prelude::v1::*;
-
 use ffi::CStr;
 use io;
 use libc::{self, c_int, size_t, sockaddr, socklen_t};
diff --git a/src/libstd/sys/unix/os.rs b/src/libstd/sys/unix/os.rs
index c29e87f91c9..e61804efd50 100644
--- a/src/libstd/sys/unix/os.rs
+++ b/src/libstd/sys/unix/os.rs
@@ -12,7 +12,6 @@
 
 #![allow(unused_imports)] // lots of cfg code here
 
-use prelude::v1::*;
 use os::unix::prelude::*;
 
 use error::Error as StdError;
diff --git a/src/libstd/sys/unix/os_str.rs b/src/libstd/sys/unix/os_str.rs
index d5eea5d1f3b..5a733c0cb87 100644
--- a/src/libstd/sys/unix/os_str.rs
+++ b/src/libstd/sys/unix/os_str.rs
@@ -13,9 +13,7 @@
 
 use borrow::Cow;
 use fmt::{self, Debug};
-use vec::Vec;
 use str;
-use string::String;
 use mem;
 use sys_common::{AsInner, IntoInner};
 
diff --git a/src/libstd/sys/unix/pipe.rs b/src/libstd/sys/unix/pipe.rs
index 01059413338..ffe8032e460 100644
--- a/src/libstd/sys/unix/pipe.rs
+++ b/src/libstd/sys/unix/pipe.rs
@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use prelude::v1::*;
-
 use cmp;
 use io;
 use libc::{self, c_int};
diff --git a/src/libstd/sys/unix/process.rs b/src/libstd/sys/unix/process.rs
index d68867fb3d2..50014f51f6c 100644
--- a/src/libstd/sys/unix/process.rs
+++ b/src/libstd/sys/unix/process.rs
@@ -8,7 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use prelude::v1::*;
 use os::unix::prelude::*;
 
 use collections::hash_map::{HashMap, Entry};
@@ -593,7 +592,6 @@ impl Process {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use prelude::v1::*;
 
     use ffi::OsStr;
     use mem;
diff --git a/src/libstd/sys/unix/stdio.rs b/src/libstd/sys/unix/stdio.rs
index 37d1d9a969e..972bdbc3818 100644
--- a/src/libstd/sys/unix/stdio.rs
+++ b/src/libstd/sys/unix/stdio.rs
@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use prelude::v1::*;
-
 use io;
 use libc;
 use sys::fd::FileDesc;
diff --git a/src/libstd/sys/unix/thread.rs b/src/libstd/sys/unix/thread.rs
index 75e10d25853..5db7086e427 100644
--- a/src/libstd/sys/unix/thread.rs
+++ b/src/libstd/sys/unix/thread.rs
@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use prelude::v1::*;
-
 use alloc::boxed::FnBox;
 use cmp;
 use ffi::CStr;
@@ -193,8 +191,6 @@ pub mod guard {
           target_os = "solaris"))]
 #[cfg_attr(test, allow(dead_code))]
 pub mod guard {
-    use prelude::v1::*;
-
     use libc;
     use libc::mmap;
     use libc::{PROT_NONE, MAP_PRIVATE, MAP_ANON, MAP_FAILED, MAP_FIXED};
diff --git a/src/libstd/sys/windows/compat.rs b/src/libstd/sys/windows/compat.rs
index acbfacce8bd..cd42b7d05ee 100644
--- a/src/libstd/sys/windows/compat.rs
+++ b/src/libstd/sys/windows/compat.rs
@@ -21,8 +21,6 @@
 //! manner we pay a semi-large one-time cost up front for detecting whether a
 //! function is available but afterwards it's just a load and a jump.
 
-use prelude::v1::*;
-
 use ffi::CString;
 use sync::atomic::{AtomicUsize, Ordering};
 use sys::c;
diff --git a/src/libstd/sys/windows/dynamic_lib.rs b/src/libstd/sys/windows/dynamic_lib.rs
index dde13ec8364..5227280808f 100644
--- a/src/libstd/sys/windows/dynamic_lib.rs
+++ b/src/libstd/sys/windows/dynamic_lib.rs
@@ -8,7 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use prelude::v1::*;
 use os::windows::prelude::*;
 
 use ffi::{CString, OsStr};
diff --git a/src/libstd/sys/windows/fs.rs b/src/libstd/sys/windows/fs.rs
index 4e6cef9a28d..fe448cdd78f 100644
--- a/src/libstd/sys/windows/fs.rs
+++ b/src/libstd/sys/windows/fs.rs
@@ -8,7 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use prelude::v1::*;
 use os::windows::prelude::*;
 
 use ffi::OsString;
diff --git a/src/libstd/sys/windows/handle.rs b/src/libstd/sys/windows/handle.rs
index d10abae2865..97e746ee345 100644
--- a/src/libstd/sys/windows/handle.rs
+++ b/src/libstd/sys/windows/handle.rs
@@ -10,8 +10,6 @@
 
 #![unstable(issue = "0", feature = "windows_handle")]
 
-use prelude::v1::*;
-
 use cmp;
 use io::{ErrorKind, Read};
 use io;
diff --git a/src/libstd/sys/windows/mod.rs b/src/libstd/sys/windows/mod.rs
index 12219c1e9d4..9741a704e8f 100644
--- a/src/libstd/sys/windows/mod.rs
+++ b/src/libstd/sys/windows/mod.rs
@@ -10,8 +10,6 @@
 
 #![allow(missing_docs, bad_style)]
 
-use prelude::v1::*;
-
 use ffi::{OsStr, OsString};
 use io::{self, ErrorKind};
 use os::windows::ffi::{OsStrExt, OsStringExt};
diff --git a/src/libstd/sys/windows/mutex.rs b/src/libstd/sys/windows/mutex.rs
index 8762b34e3da..85560368590 100644
--- a/src/libstd/sys/windows/mutex.rs
+++ b/src/libstd/sys/windows/mutex.rs
@@ -29,8 +29,6 @@
 //! CriticalSection is used and we keep track of who's holding the mutex to
 //! detect recursive locks.
 
-use prelude::v1::*;
-
 use cell::UnsafeCell;
 use mem;
 use sync::atomic::{AtomicUsize, Ordering};
diff --git a/src/libstd/sys/windows/net.rs b/src/libstd/sys/windows/net.rs
index 71e164f012f..aca6994503f 100644
--- a/src/libstd/sys/windows/net.rs
+++ b/src/libstd/sys/windows/net.rs
@@ -10,8 +10,6 @@
 
 #![unstable(issue = "0", feature = "windows_net")]
 
-use prelude::v1::*;
-
 use cmp;
 use io::{self, Read};
 use libc::{c_int, c_void, c_ulong};
diff --git a/src/libstd/sys/windows/os.rs b/src/libstd/sys/windows/os.rs
index 0cea7f81e36..260fc3c4db6 100644
--- a/src/libstd/sys/windows/os.rs
+++ b/src/libstd/sys/windows/os.rs
@@ -12,7 +12,6 @@
 
 #![allow(bad_style)]
 
-use prelude::v1::*;
 use os::windows::prelude::*;
 
 use error::Error as StdError;
diff --git a/src/libstd/sys/windows/os_str.rs b/src/libstd/sys/windows/os_str.rs
index 26767a1349e..a065c7a7fd0 100644
--- a/src/libstd/sys/windows/os_str.rs
+++ b/src/libstd/sys/windows/os_str.rs
@@ -14,9 +14,6 @@
 use borrow::Cow;
 use fmt::{self, Debug};
 use sys_common::wtf8::{Wtf8, Wtf8Buf};
-use string::String;
-use result::Result;
-use option::Option;
 use mem;
 use sys_common::{AsInner, IntoInner};
 
diff --git a/src/libstd/sys/windows/pipe.rs b/src/libstd/sys/windows/pipe.rs
index 6e9c67051a6..ed7e88e72cd 100644
--- a/src/libstd/sys/windows/pipe.rs
+++ b/src/libstd/sys/windows/pipe.rs
@@ -8,7 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use prelude::v1::*;
 use os::windows::prelude::*;
 
 use ffi::OsStr;
diff --git a/src/libstd/sys/windows/process.rs b/src/libstd/sys/windows/process.rs
index 3ca75cf3643..d371714ff0e 100644
--- a/src/libstd/sys/windows/process.rs
+++ b/src/libstd/sys/windows/process.rs
@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use prelude::v1::*;
-
 use ascii::*;
 use collections::HashMap;
 use collections;
@@ -491,7 +489,6 @@ fn make_dirp(d: Option<&OsString>) -> io::Result<(*const u16, Vec<u16>)> {
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
     use ffi::{OsStr, OsString};
     use super::make_command_line;
 
diff --git a/src/libstd/sys/windows/stdio.rs b/src/libstd/sys/windows/stdio.rs
index fa3cab2191e..01249f05f62 100644
--- a/src/libstd/sys/windows/stdio.rs
+++ b/src/libstd/sys/windows/stdio.rs
@@ -10,7 +10,6 @@
 
 #![unstable(issue = "0", feature = "windows_stdio")]
 
-use prelude::v1::*;
 use io::prelude::*;
 
 use cmp;
diff --git a/src/libstd/sys/windows/thread.rs b/src/libstd/sys/windows/thread.rs
index 0383e92c79e..5a376a867ee 100644
--- a/src/libstd/sys/windows/thread.rs
+++ b/src/libstd/sys/windows/thread.rs
@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use prelude::v1::*;
-
 use alloc::boxed::FnBox;
 use io;
 use ffi::CStr;
diff --git a/src/libstd/sys/windows/thread_local.rs b/src/libstd/sys/windows/thread_local.rs
index 59da74b7287..5d3084094fb 100644
--- a/src/libstd/sys/windows/thread_local.rs
+++ b/src/libstd/sys/windows/thread_local.rs
@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use prelude::v1::*;
-
 use ptr;
 use sys::c;
 use sys_common::mutex::Mutex;
diff --git a/src/libstd/thread/local.rs b/src/libstd/thread/local.rs
index 152b9771086..c44dee49f14 100644
--- a/src/libstd/thread/local.rs
+++ b/src/libstd/thread/local.rs
@@ -369,7 +369,6 @@ pub mod elf {
     // Due to rust-lang/rust#18804, make sure this is not generic!
     #[cfg(target_os = "linux")]
     unsafe fn register_dtor(t: *mut u8, dtor: unsafe extern fn(*mut u8)) {
-        use prelude::v1::*;
         use mem;
         use libc;
         use sys_common::thread_local as os;
@@ -460,8 +459,6 @@ pub mod elf {
 
 #[doc(hidden)]
 pub mod os {
-    use prelude::v1::*;
-
     use cell::{Cell, UnsafeCell};
     use marker;
     use ptr;
@@ -529,8 +526,6 @@ pub mod os {
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
-
     use sync::mpsc::{channel, Sender};
     use cell::{Cell, UnsafeCell};
     use super::LocalKeyState;
@@ -693,8 +688,6 @@ mod tests {
 
 #[cfg(test)]
 mod dynamic_tests {
-    use prelude::v1::*;
-
     use cell::RefCell;
     use collections::HashMap;
 
diff --git a/src/libstd/thread/mod.rs b/src/libstd/thread/mod.rs
index f06c105d30e..f3e1710f50b 100644
--- a/src/libstd/thread/mod.rs
+++ b/src/libstd/thread/mod.rs
@@ -161,8 +161,6 @@
 
 #![stable(feature = "rust1", since = "1.0.0")]
 
-use prelude::v1::*;
-
 use any::Any;
 use cell::UnsafeCell;
 use ffi::{CStr, CString};
@@ -732,8 +730,6 @@ fn _assert_sync_and_send() {
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
-
     use any::Any;
     use sync::mpsc::{channel, Sender};
     use result;
@@ -786,8 +782,6 @@ mod tests {
 
     #[test]
     fn test_spawn_sched() {
-        use clone::Clone;
-
         let (tx, rx) = channel();
 
         fn f(i: i32, tx: Sender<()>) {