diff --git a/examples/cpu_monitor.rs b/examples/cpu_monitor.rs
index bc449569a..1ad1db763 100644
--- a/examples/cpu_monitor.rs
+++ b/examples/cpu_monitor.rs
@@ -2,7 +2,6 @@
 extern crate serde_derive;
 
 use docopt::Docopt;
-use rayon;
 use std::io;
 use std::process;
 
diff --git a/rayon-core/src/lib.rs b/rayon-core/src/lib.rs
index 5365fe284..fd9c360ab 100644
--- a/rayon-core/src/lib.rs
+++ b/rayon-core/src/lib.rs
@@ -64,8 +64,6 @@ pub use self::thread_pool::current_thread_has_pending_tasks;
 pub use self::thread_pool::current_thread_index;
 pub use self::thread_pool::ThreadPool;
 
-use crossbeam_utils;
-use num_cpus;
 use self::registry::{CustomSpawn, DefaultSpawn, ThreadSpawn};
 
 /// Returns the number of threads in the current registry. If this
diff --git a/rayon-core/tests/scope_join.rs b/rayon-core/tests/scope_join.rs
index 3bf07d6b5..9d88133bc 100644
--- a/rayon-core/tests/scope_join.rs
+++ b/rayon-core/tests/scope_join.rs
@@ -1,5 +1,3 @@
-use rayon_core;
-
 /// Test that one can emulate join with `scope`:
 fn pseudo_join<F, G>(f: F, g: G)
 where
diff --git a/rayon-demo/src/factorial/mod.rs b/rayon-demo/src/factorial/mod.rs
index 3ec42ca75..16ef9991f 100644
--- a/rayon-demo/src/factorial/mod.rs
+++ b/rayon-demo/src/factorial/mod.rs
@@ -1,10 +1,8 @@
 //! Benchmark Factorial N! = 1×2×⋯×N
 
 use num::{BigUint, One};
-use rayon;
 use rayon::prelude::*;
 use std::ops::Mul;
-use test;
 
 const N: u32 = 9999;
 
diff --git a/rayon-demo/src/fibonacci/mod.rs b/rayon-demo/src/fibonacci/mod.rs
index 21d8be86c..1500871fc 100644
--- a/rayon-demo/src/fibonacci/mod.rs
+++ b/rayon-demo/src/fibonacci/mod.rs
@@ -15,8 +15,6 @@
 
 extern crate test;
 
-use rayon;
-
 const N: u32 = 32;
 const FN: u32 = 2_178_309;
 
diff --git a/rayon-demo/src/join_microbench.rs b/rayon-demo/src/join_microbench.rs
index a978498f4..f56206ef9 100644
--- a/rayon-demo/src/join_microbench.rs
+++ b/rayon-demo/src/join_microbench.rs
@@ -1,6 +1,5 @@
 //! Some microbenchmarks that stress test a pure `join` path.
 
-use rayon;
 use rayon::prelude::*;
 use std::usize;
 use test::Bencher;
diff --git a/rayon-demo/src/life/mod.rs b/rayon-demo/src/life/mod.rs
index 550685b15..25cc2998c 100644
--- a/rayon-demo/src/life/mod.rs
+++ b/rayon-demo/src/life/mod.rs
@@ -21,7 +21,6 @@ use std::iter::repeat;
 use std::num::Wrapping;
 use std::sync::Arc;
 use std::thread;
-use time;
 
 use docopt::Docopt;
 use rayon::iter::ParallelBridge;
diff --git a/rayon-demo/src/main.rs b/rayon-demo/src/main.rs
index 9494e992a..c1be50236 100644
--- a/rayon-demo/src/main.rs
+++ b/rayon-demo/src/main.rs
@@ -47,9 +47,6 @@ extern crate winapi; // life
 #[cfg(test)]
 extern crate test;
 
-use rand;
-use rand_xorshift;
-
 const USAGE: &str = "
 Usage: rayon-demo bench
        rayon-demo <demo-name> [ options ]
diff --git a/rayon-demo/src/matmul/bench.rs b/rayon-demo/src/matmul/bench.rs
index 6426357ef..81333495e 100644
--- a/rayon-demo/src/matmul/bench.rs
+++ b/rayon-demo/src/matmul/bench.rs
@@ -1,5 +1,3 @@
-use test;
-
 const ROW_SIZE: usize = 256;
 
 #[bench]
diff --git a/rayon-demo/src/matmul/mod.rs b/rayon-demo/src/matmul/mod.rs
index 954e8877e..a74ac7ef4 100644
--- a/rayon-demo/src/matmul/mod.rs
+++ b/rayon-demo/src/matmul/mod.rs
@@ -17,7 +17,6 @@ pub struct Args {
 }
 
 use docopt::Docopt;
-use rayon;
 use rayon::prelude::*;
 
 use std::time::Instant;
diff --git a/rayon-demo/src/mergesort/bench.rs b/rayon-demo/src/mergesort/bench.rs
index a643ebbd5..ad6a23d5d 100644
--- a/rayon-demo/src/mergesort/bench.rs
+++ b/rayon-demo/src/mergesort/bench.rs
@@ -1,5 +1,3 @@
-use test;
-
 // Size to use when doing `cargo bench`; extensively tuned to run in
 // "not too long" on my laptop -nmatsakis
 const BENCH_SIZE: usize = 250_000_000 / 512;
diff --git a/rayon-demo/src/mergesort/mod.rs b/rayon-demo/src/mergesort/mod.rs
index eb5435e9d..f7813deba 100644
--- a/rayon-demo/src/mergesort/mod.rs
+++ b/rayon-demo/src/mergesort/mod.rs
@@ -25,7 +25,6 @@ pub struct Args {
 }
 
 use docopt::Docopt;
-use rayon;
 
 use std::cmp::max;
 use std::time::Instant;
diff --git a/rayon-demo/src/nbody/bench.rs b/rayon-demo/src/nbody/bench.rs
index 1e44b388e..032ccbbb6 100644
--- a/rayon-demo/src/nbody/bench.rs
+++ b/rayon-demo/src/nbody/bench.rs
@@ -1,5 +1,3 @@
-use test;
-
 use super::nbody::NBodyBenchmark;
 
 // Because benchmarks run iteratively, use smaller constants by default:
diff --git a/rayon-demo/src/nbody/mod.rs b/rayon-demo/src/nbody/mod.rs
index b359a89e2..c65febcde 100644
--- a/rayon-demo/src/nbody/mod.rs
+++ b/rayon-demo/src/nbody/mod.rs
@@ -1,5 +1,4 @@
 use docopt::Docopt;
-use time;
 
 #[cfg(test)]
 mod bench;
diff --git a/rayon-demo/src/pythagoras/mod.rs b/rayon-demo/src/pythagoras/mod.rs
index 980f12ade..5d5b88a1e 100644
--- a/rayon-demo/src/pythagoras/mod.rs
+++ b/rayon-demo/src/pythagoras/mod.rs
@@ -6,7 +6,6 @@ use rayon::prelude::*;
 use rayon::range::Iter;
 use std::ops::Add;
 use std::usize;
-use test;
 
 /// Use Euclid's formula to count Pythagorean triples
 ///
diff --git a/rayon-demo/src/quicksort/bench.rs b/rayon-demo/src/quicksort/bench.rs
index 70620ec1c..5b4fc1e7b 100644
--- a/rayon-demo/src/quicksort/bench.rs
+++ b/rayon-demo/src/quicksort/bench.rs
@@ -1,5 +1,3 @@
-use test;
-
 use super::{Parallel, Sequential};
 
 // Size to use when doing `cargo bench`; extensively tuned to run in
diff --git a/rayon-demo/src/quicksort/mod.rs b/rayon-demo/src/quicksort/mod.rs
index 504e16830..36696d496 100644
--- a/rayon-demo/src/quicksort/mod.rs
+++ b/rayon-demo/src/quicksort/mod.rs
@@ -25,7 +25,6 @@ pub struct Args {
 use docopt::Docopt;
 use rand::distributions::Standard;
 use rand::Rng;
-use rayon;
 use std::time::Instant;
 
 pub trait Joiner {
diff --git a/rayon-demo/src/sieve/bench.rs b/rayon-demo/src/sieve/bench.rs
index 79077384d..8125fbe0b 100644
--- a/rayon-demo/src/sieve/bench.rs
+++ b/rayon-demo/src/sieve/bench.rs
@@ -1,5 +1,3 @@
-use test;
-
 use super::NUM_PRIMES;
 
 const MAGNITUDE: usize = 7;
diff --git a/rayon-demo/src/sieve/mod.rs b/rayon-demo/src/sieve/mod.rs
index 5ea1f6297..1f4c5079a 100644
--- a/rayon-demo/src/sieve/mod.rs
+++ b/rayon-demo/src/sieve/mod.rs
@@ -42,7 +42,6 @@ mod bench;
 use docopt::Docopt;
 use odds::stride::StrideMut;
 use rayon::prelude::*;
-use time;
 
 const CHUNK_SIZE: usize = 100_000;
 
diff --git a/rayon-demo/src/tsp/bench.rs b/rayon-demo/src/tsp/bench.rs
index 9aecd3c68..28692ac7b 100644
--- a/rayon-demo/src/tsp/bench.rs
+++ b/rayon-demo/src/tsp/bench.rs
@@ -1,5 +1,4 @@
 use std::path::Path;
-use test;
 
 use super::graph::Node;
 use super::parse_solver;
diff --git a/rayon-demo/src/tsp/solver.rs b/rayon-demo/src/tsp/solver.rs
index b461b3a22..21c908b6e 100644
--- a/rayon-demo/src/tsp/solver.rs
+++ b/rayon-demo/src/tsp/solver.rs
@@ -1,4 +1,3 @@
-use rayon;
 use std::collections::BinaryHeap;
 use std::sync::atomic::{AtomicUsize, Ordering};
 use std::sync::{Arc, Mutex};
diff --git a/src/iter/empty.rs b/src/iter/empty.rs
index eb5797c9d..85a2e5fd9 100644
--- a/src/iter/empty.rs
+++ b/src/iter/empty.rs
@@ -1,7 +1,6 @@
 use crate::iter::plumbing::*;
 use crate::iter::*;
 
-use std;
 use std::fmt;
 use std::marker::PhantomData;
 
diff --git a/src/option.rs b/src/option.rs
index fc1f7d286..0f56896f0 100644
--- a/src/option.rs
+++ b/src/option.rs
@@ -7,7 +7,6 @@
 
 use crate::iter::plumbing::*;
 use crate::iter::*;
-use std;
 use std::sync::atomic::{AtomicBool, Ordering};
 
 /// A parallel iterator over the value in [`Some`] variant of an [`Option`].
diff --git a/src/slice/mergesort.rs b/src/slice/mergesort.rs
index 07a3e0c30..a007cae80 100644
--- a/src/slice/mergesort.rs
+++ b/src/slice/mergesort.rs
@@ -5,7 +5,6 @@
 //! `MergesortResult` and leaves descending arrays intact.
 
 use crate::iter::*;
-use rayon_core;
 use crate::slice::ParallelSliceMut;
 use std::mem;
 use std::mem::size_of;
diff --git a/src/slice/quicksort.rs b/src/slice/quicksort.rs
index 95df40124..b98507351 100644
--- a/src/slice/quicksort.rs
+++ b/src/slice/quicksort.rs
@@ -4,7 +4,6 @@
 //! The only difference from the original is that calls to `recurse` are executed in parallel using
 //! `rayon_core::join`.
 
-use rayon_core;
 use std::cmp;
 use std::mem;
 use std::ptr;
diff --git a/src/vec.rs b/src/vec.rs
index 617cfac18..bfbf9395a 100644
--- a/src/vec.rs
+++ b/src/vec.rs
@@ -7,7 +7,6 @@
 
 use crate::iter::plumbing::*;
 use crate::iter::*;
-use std;
 
 /// Parallel iterator that moves out of a vector.
 #[derive(Debug, Clone)]