diff --git a/tokio-buf/src/lib.rs b/tokio-buf/src/lib.rs
index 1d63c2034..0b45a376c 100644
--- a/tokio-buf/src/lib.rs
+++ b/tokio-buf/src/lib.rs
@@ -1,9 +1,9 @@
 #![doc(html_root_url = "https://docs.rs/tokio-buf/0.2.0-alpha.1")]
 #![warn(
-    missing_docs,
     missing_debug_implementations,
-    unreachable_pub,
-    rust_2018_idioms
+    missing_docs,
+    rust_2018_idioms,
+    unreachable_pub
 )]
 #![doc(test(no_crate_inject, attr(deny(rust_2018_idioms))))]
 
diff --git a/tokio-codec/src/framed.rs b/tokio-codec/src/framed.rs
index da131ee15..ac733d59f 100644
--- a/tokio-codec/src/framed.rs
+++ b/tokio-codec/src/framed.rs
@@ -23,7 +23,7 @@ pub struct Framed<T, U> {
     inner: FramedRead2<FramedWrite2<Fuse<T, U>>>,
 }
 
-pub struct Fuse<T, U>(pub T, pub U);
+pub(crate) struct Fuse<T, U>(pub(crate) T, pub(crate) U);
 
 impl<T, U> Framed<T, U>
 where
diff --git a/tokio-codec/src/framed_read.rs b/tokio-codec/src/framed_read.rs
index 25fc26b41..85f221b9a 100644
--- a/tokio-codec/src/framed_read.rs
+++ b/tokio-codec/src/framed_read.rs
@@ -16,7 +16,7 @@ pub struct FramedRead<T, D> {
     inner: FramedRead2<Fuse<T, D>>,
 }
 
-pub struct FramedRead2<T> {
+pub(crate) struct FramedRead2<T> {
     inner: T,
     eof: bool,
     is_readable: bool,
@@ -136,7 +136,7 @@ where
 
 // ===== impl FramedRead2 =====
 
-pub fn framed_read2<T>(inner: T) -> FramedRead2<T> {
+pub(crate) fn framed_read2<T>(inner: T) -> FramedRead2<T> {
     FramedRead2 {
         inner,
         eof: false,
@@ -145,7 +145,7 @@ pub fn framed_read2<T>(inner: T) -> FramedRead2<T> {
     }
 }
 
-pub fn framed_read2_with_buffer<T>(inner: T, mut buf: BytesMut) -> FramedRead2<T> {
+pub(crate) fn framed_read2_with_buffer<T>(inner: T, mut buf: BytesMut) -> FramedRead2<T> {
     if buf.capacity() < INITIAL_CAPACITY {
         let bytes_to_reserve = INITIAL_CAPACITY - buf.capacity();
         buf.reserve(bytes_to_reserve);
@@ -159,19 +159,19 @@ pub fn framed_read2_with_buffer<T>(inner: T, mut buf: BytesMut) -> FramedRead2<T
 }
 
 impl<T> FramedRead2<T> {
-    pub fn get_ref(&self) -> &T {
+    pub(crate) fn get_ref(&self) -> &T {
         &self.inner
     }
 
-    pub fn into_inner(self) -> T {
+    pub(crate) fn into_inner(self) -> T {
         self.inner
     }
 
-    pub fn into_parts(self) -> (T, BytesMut) {
+    pub(crate) fn into_parts(self) -> (T, BytesMut) {
         (self.inner, self.buffer)
     }
 
-    pub fn get_mut(&mut self) -> &mut T {
+    pub(crate) fn get_mut(&mut self) -> &mut T {
         &mut self.inner
     }
 }
diff --git a/tokio-codec/src/framed_write.rs b/tokio-codec/src/framed_write.rs
index 0ea45b5cc..f89e46112 100644
--- a/tokio-codec/src/framed_write.rs
+++ b/tokio-codec/src/framed_write.rs
@@ -20,7 +20,7 @@ pub struct FramedWrite<T, E> {
     inner: FramedWrite2<Fuse<T, E>>,
 }
 
-pub struct FramedWrite2<T> {
+pub(crate) struct FramedWrite2<T> {
     inner: T,
     buffer: BytesMut,
 }
@@ -136,14 +136,14 @@ where
 
 // ===== impl FramedWrite2 =====
 
-pub fn framed_write2<T>(inner: T) -> FramedWrite2<T> {
+pub(crate) fn framed_write2<T>(inner: T) -> FramedWrite2<T> {
     FramedWrite2 {
         inner,
         buffer: BytesMut::with_capacity(INITIAL_CAPACITY),
     }
 }
 
-pub fn framed_write2_with_buffer<T>(inner: T, mut buf: BytesMut) -> FramedWrite2<T> {
+pub(crate) fn framed_write2_with_buffer<T>(inner: T, mut buf: BytesMut) -> FramedWrite2<T> {
     if buf.capacity() < INITIAL_CAPACITY {
         let bytes_to_reserve = INITIAL_CAPACITY - buf.capacity();
         buf.reserve(bytes_to_reserve);
@@ -152,19 +152,19 @@ pub fn framed_write2_with_buffer<T>(inner: T, mut buf: BytesMut) -> FramedWrite2
 }
 
 impl<T> FramedWrite2<T> {
-    pub fn get_ref(&self) -> &T {
+    pub(crate) fn get_ref(&self) -> &T {
         &self.inner
     }
 
-    pub fn into_inner(self) -> T {
+    pub(crate) fn into_inner(self) -> T {
         self.inner
     }
 
-    pub fn into_parts(self) -> (T, BytesMut) {
+    pub(crate) fn into_parts(self) -> (T, BytesMut) {
         (self.inner, self.buffer)
     }
 
-    pub fn get_mut(&mut self) -> &mut T {
+    pub(crate) fn get_mut(&mut self) -> &mut T {
         &mut self.inner
     }
 }
diff --git a/tokio-codec/src/lib.rs b/tokio-codec/src/lib.rs
index 8e1802b8b..b4f4a67c1 100644
--- a/tokio-codec/src/lib.rs
+++ b/tokio-codec/src/lib.rs
@@ -1,5 +1,10 @@
 #![doc(html_root_url = "https://docs.rs/tokio-codec/0.2.0-alpha.1")]
-#![warn(missing_docs, missing_debug_implementations, rust_2018_idioms)]
+#![warn(
+    missing_debug_implementations,
+    missing_docs,
+    rust_2018_idioms,
+    unreachable_pub
+)]
 #![doc(test(no_crate_inject, attr(deny(rust_2018_idioms))))]
 
 //! Utilities for encoding and decoding frames.
diff --git a/tokio-current-thread/src/lib.rs b/tokio-current-thread/src/lib.rs
index f22fb70e4..771ff4f44 100644
--- a/tokio-current-thread/src/lib.rs
+++ b/tokio-current-thread/src/lib.rs
@@ -1,5 +1,10 @@
 #![doc(html_root_url = "https://docs.rs/tokio-current-thread/0.2.0-alpha.1")]
-#![warn(missing_docs, missing_debug_implementations, rust_2018_idioms)]
+#![warn(
+    missing_debug_implementations,
+    missing_docs,
+    rust_2018_idioms,
+    unreachable_pub
+)]
 #![doc(test(no_crate_inject, attr(deny(rust_2018_idioms))))]
 
 //! A single-threaded executor which executes tasks on the same thread from which
diff --git a/tokio-current-thread/src/scheduler.rs b/tokio-current-thread/src/scheduler.rs
index 06ad2aa62..d53984eb6 100644
--- a/tokio-current-thread/src/scheduler.rs
+++ b/tokio-current-thread/src/scheduler.rs
@@ -16,7 +16,7 @@ use tokio_executor::park::Unpark;
 /// A generic task-aware scheduler.
 ///
 /// This is used both by `FuturesUnordered` and the current-thread executor.
-pub struct Scheduler<U> {
+pub(crate) struct Scheduler<U> {
     inner: Arc<Inner<U>>,
     nodes: List<U>,
 }
@@ -117,7 +117,7 @@ enum Dequeue<U> {
 struct Task(Pin<Box<dyn Future<Output = ()>>>);
 
 /// A task that is scheduled. `turn` must be called
-pub struct Scheduled<'a, U> {
+pub(crate) struct Scheduled<'a, U> {
     task: &'a mut Task,
     node: &'a Arc<Node<U>>,
     done: &'a mut bool,
@@ -131,7 +131,7 @@ where
     ///
     /// The returned `Scheduler` does not contain any items and, in this
     /// state, `Scheduler::poll` will return `Ok(Async::Ready(None))`.
-    pub fn new(unpark: U) -> Self {
+    pub(crate) fn new(unpark: U) -> Self {
         let stub = Arc::new(Node {
             item: UnsafeCell::new(None),
             notified_at: AtomicUsize::new(0),
@@ -156,11 +156,11 @@ where
         }
     }
 
-    pub fn waker(&self) -> Waker {
+    pub(crate) fn waker(&self) -> Waker {
         waker_inner(self.inner.clone())
     }
 
-    pub fn schedule(&mut self, item: Pin<Box<dyn Future<Output = ()>>>) {
+    pub(crate) fn schedule(&mut self, item: Pin<Box<dyn Future<Output = ()>>>) {
         // Get the current scheduler tick
         let tick_num = self.inner.tick_num.load(SeqCst);
 
@@ -187,7 +187,7 @@ where
     }
 
     /// Returns `true` if there are currently any pending futures
-    pub fn has_pending_futures(&mut self) -> bool {
+    pub(crate) fn has_pending_futures(&mut self) -> bool {
         // See function definition for why the unsafe is needed and
         // correctly used here
         unsafe { self.inner.has_pending_futures() }
@@ -198,7 +198,7 @@ where
     ///
     /// This function should be called whenever the caller is notified via a
     /// wakeup.
-    pub fn tick(&mut self, eid: u64, num_futures: &AtomicUsize) -> bool {
+    pub(crate) fn tick(&mut self, eid: u64, num_futures: &AtomicUsize) -> bool {
         let mut ret = false;
         let tick = self.inner.tick_num.fetch_add(1, SeqCst).wrapping_add(1);
 
@@ -331,7 +331,7 @@ where
 
 impl<U: Unpark> Scheduled<'_, U> {
     /// Polls the task, returns `true` if the task has completed.
-    pub fn tick(&mut self) -> bool {
+    pub(crate) fn tick(&mut self) -> bool {
         let waker = unsafe {
             // Safety: we don't hold this waker ref longer than
             // this `tick` function
@@ -349,7 +349,7 @@ impl<U: Unpark> Scheduled<'_, U> {
 }
 
 impl Task {
-    pub fn new(future: Pin<Box<dyn Future<Output = ()> + 'static>>) -> Self {
+    pub(crate) fn new(future: Pin<Box<dyn Future<Output = ()> + 'static>>) -> Self {
         Task(future)
     }
 }
diff --git a/tokio-executor/src/lib.rs b/tokio-executor/src/lib.rs
index aceb6efe3..8f15d603e 100644
--- a/tokio-executor/src/lib.rs
+++ b/tokio-executor/src/lib.rs
@@ -1,5 +1,10 @@
 #![doc(html_root_url = "https://docs.rs/tokio-executor/0.2.0-alpha.1")]
-#![warn(missing_docs, missing_debug_implementations, rust_2018_idioms)]
+#![warn(
+    missing_debug_implementations,
+    missing_docs,
+    rust_2018_idioms,
+    unreachable_pub
+)]
 #![doc(test(no_crate_inject, attr(deny(rust_2018_idioms))))]
 
 //! Task execution related traits and utilities.
diff --git a/tokio-executor/src/park.rs b/tokio-executor/src/park.rs
index 0770c50b7..86876654b 100644
--- a/tokio-executor/src/park.rs
+++ b/tokio-executor/src/park.rs
@@ -194,7 +194,7 @@ thread_local! {
 // ==== impl Parker ====
 
 impl Parker {
-    pub fn new() -> Self {
+    pub(crate) fn new() -> Self {
         Self {
             unparker: Arc::new(Inner {
                 state: AtomicUsize::new(IDLE),
@@ -204,15 +204,15 @@ impl Parker {
         }
     }
 
-    pub fn unparker(&self) -> &Arc<Inner> {
+    pub(crate) fn unparker(&self) -> &Arc<Inner> {
         &self.unparker
     }
 
-    pub fn park(&self) -> Result<(), ParkError> {
+    pub(crate) fn park(&self) -> Result<(), ParkError> {
         self.unparker.park(None)
     }
 
-    pub fn park_timeout(&self, timeout: Duration) -> Result<(), ParkError> {
+    pub(crate) fn park_timeout(&self, timeout: Duration) -> Result<(), ParkError> {
         self.unparker.park(Some(timeout))
     }
 }
@@ -221,16 +221,16 @@ impl Parker {
 
 impl Inner {
     #[allow(clippy::wrong_self_convention)]
-    pub fn into_raw(this: Arc<Inner>) -> *const () {
+    pub(crate) fn into_raw(this: Arc<Inner>) -> *const () {
         Arc::into_raw(this) as *const ()
     }
 
-    pub unsafe fn from_raw(ptr: *const ()) -> Arc<Inner> {
+    pub(crate) unsafe fn from_raw(ptr: *const ()) -> Arc<Inner> {
         Arc::from_raw(ptr as *const Inner)
     }
 
     /// Park the current thread for at most `dur`.
-    pub fn park(&self, timeout: Option<Duration>) -> Result<(), ParkError> {
+    pub(crate) fn park(&self, timeout: Option<Duration>) -> Result<(), ParkError> {
         // If currently notified, then we skip sleeping. This is checked outside
         // of the lock to avoid acquiring a mutex if not necessary.
         match self.state.compare_and_swap(NOTIFY, IDLE, Ordering::SeqCst) {
@@ -272,7 +272,7 @@ impl Inner {
         Ok(())
     }
 
-    pub fn unpark(&self) {
+    pub(crate) fn unpark(&self) {
         // First, try transitioning from IDLE -> NOTIFY, this does not require a
         // lock.
         match self.state.compare_and_swap(IDLE, NOTIFY, Ordering::SeqCst) {
diff --git a/tokio-fs/src/lib.rs b/tokio-fs/src/lib.rs
index 46387e1c8..341502dc7 100644
--- a/tokio-fs/src/lib.rs
+++ b/tokio-fs/src/lib.rs
@@ -1,5 +1,10 @@
 #![doc(html_root_url = "https://docs.rs/tokio-fs/0.2.0-alpha.1")]
-#![warn(missing_docs, missing_debug_implementations, rust_2018_idioms)]
+#![warn(
+    missing_debug_implementations,
+    missing_docs,
+    rust_2018_idioms,
+    unreachable_pub
+)]
 #![doc(test(no_crate_inject, attr(deny(rust_2018_idioms))))]
 #![feature(async_await)]
 
diff --git a/tokio-io/src/io/mod.rs b/tokio-io/src/io/mod.rs
index 0b0f24fab..71904c1fe 100644
--- a/tokio-io/src/io/mod.rs
+++ b/tokio-io/src/io/mod.rs
@@ -52,6 +52,9 @@ mod shutdown;
 mod write;
 mod write_all;
 
+#[allow(unreachable_pub)] // https://github.com/rust-lang/rust/issues/57411
 pub use self::async_buf_read_ext::AsyncBufReadExt;
+#[allow(unreachable_pub)] // https://github.com/rust-lang/rust/issues/57411
 pub use self::async_read_ext::AsyncReadExt;
+#[allow(unreachable_pub)] // https://github.com/rust-lang/rust/issues/57411
 pub use self::async_write_ext::AsyncWriteExt;
diff --git a/tokio-io/src/lib.rs b/tokio-io/src/lib.rs
index 67918b0b3..df7ffdef1 100644
--- a/tokio-io/src/lib.rs
+++ b/tokio-io/src/lib.rs
@@ -1,5 +1,10 @@
 #![doc(html_root_url = "https://docs.rs/tokio-io/0.2.0-alpha.1")]
-#![warn(missing_debug_implementations, missing_docs, rust_2018_idioms)]
+#![warn(
+    missing_debug_implementations,
+    missing_docs,
+    rust_2018_idioms,
+    unreachable_pub
+)]
 #![doc(test(no_crate_inject, attr(deny(rust_2018_idioms))))]
 
 //! Core I/O traits and combinators when working with Tokio.
diff --git a/tokio-macros/src/lib.rs b/tokio-macros/src/lib.rs
index 1d14f5ea6..7f1144f9e 100644
--- a/tokio-macros/src/lib.rs
+++ b/tokio-macros/src/lib.rs
@@ -1,5 +1,10 @@
 #![doc(html_root_url = "https://docs.rs/tokio-macros/0.2.0-alpha.1")]
-#![warn(missing_debug_implementations, unreachable_pub, rust_2018_idioms)]
+#![warn(
+    missing_debug_implementations,
+    missing_docs,
+    rust_2018_idioms,
+    unreachable_pub
+)]
 #![doc(test(no_crate_inject, attr(deny(rust_2018_idioms))))]
 
 //! Macros for use with Tokio
diff --git a/tokio-process/src/lib.rs b/tokio-process/src/lib.rs
index 31018ffec..d05b0ed27 100644
--- a/tokio-process/src/lib.rs
+++ b/tokio-process/src/lib.rs
@@ -1,4 +1,12 @@
 #![doc(html_root_url = "https://docs.rs/tokio-process/0.3.0-alpha.1")]
+#![warn(
+    missing_debug_implementations,
+    missing_docs,
+    rust_2018_idioms,
+    unreachable_pub
+)]
+#![doc(test(no_crate_inject, attr(deny(rust_2018_idioms))))]
+#![feature(async_await)]
 
 //! An implementation of asynchronous process management for Tokio.
 //!
@@ -117,11 +125,6 @@
 //! `tokio_process::Child` is dropped. The behavior of the standard library can
 //! be regained with the `Child::forget` method.
 
-#![doc(html_root_url = "https://docs.rs/tokio-process/0.3.0")]
-#![warn(missing_debug_implementations, missing_docs, rust_2018_idioms)]
-#![doc(test(no_crate_inject, attr(deny(rust_2018_idioms))))]
-#![feature(async_await)]
-
 #[cfg(unix)]
 #[macro_use]
 extern crate lazy_static;
diff --git a/tokio-process/src/unix/mod.rs b/tokio-process/src/unix/mod.rs
index 434f2d234..55497cad9 100644
--- a/tokio-process/src/unix/mod.rs
+++ b/tokio-process/src/unix/mod.rs
@@ -81,7 +81,7 @@ impl OrphanQueue<process::Child> for GlobalOrphanQueue {
 }
 
 #[must_use = "futures do nothing unless polled"]
-pub struct Child {
+pub(crate) struct Child {
     inner: Reaper<process::Child, GlobalOrphanQueue, Signal>,
 }
 
@@ -112,7 +112,7 @@ pub(crate) fn spawn_child(cmd: &mut process::Command, handle: &Handle) -> io::Re
 }
 
 impl Child {
-    pub fn id(&self) -> u32 {
+    pub(crate) fn id(&self) -> u32 {
         self.inner.id()
     }
 }
@@ -132,7 +132,7 @@ impl Future for Child {
 }
 
 #[derive(Debug)]
-pub struct Fd<T> {
+pub(crate) struct Fd<T> {
     inner: T,
 }
 
@@ -196,9 +196,9 @@ where
     }
 }
 
-pub type ChildStdin = PollEvented<Fd<process::ChildStdin>>;
-pub type ChildStdout = PollEvented<Fd<process::ChildStdout>>;
-pub type ChildStderr = PollEvented<Fd<process::ChildStderr>>;
+pub(crate) type ChildStdin = PollEvented<Fd<process::ChildStdin>>;
+pub(crate) type ChildStdout = PollEvented<Fd<process::ChildStdout>>;
+pub(crate) type ChildStderr = PollEvented<Fd<process::ChildStderr>>;
 
 fn stdio<T>(option: Option<T>, handle: &Handle) -> io::Result<Option<PollEvented<Fd<T>>>>
 where
diff --git a/tokio-process/src/windows.rs b/tokio-process/src/windows.rs
index 236ea471e..f3afd44ec 100644
--- a/tokio-process/src/windows.rs
+++ b/tokio-process/src/windows.rs
@@ -45,7 +45,7 @@ use winapi::um::winbase::*;
 use winapi::um::winnt::*;
 
 #[must_use = "futures do nothing unless polled"]
-pub struct Child {
+pub(crate) struct Child {
     child: process::Child,
     waiting: Option<Waiting>,
 }
@@ -87,7 +87,7 @@ pub(crate) fn spawn_child(cmd: &mut process::Command, handle: &Handle) -> io::Re
 }
 
 impl Child {
-    pub fn id(&self) -> u32 {
+    pub(crate) fn id(&self) -> u32 {
         self.child.id()
     }
 }
@@ -161,7 +161,7 @@ unsafe extern "system" fn callback(ptr: PVOID, _timer_fired: BOOLEAN) {
     let _ = complete.take().unwrap().send(());
 }
 
-pub fn try_wait(child: &process::Child) -> io::Result<Option<ExitStatus>> {
+pub(crate) fn try_wait(child: &process::Child) -> io::Result<Option<ExitStatus>> {
     unsafe {
         match WaitForSingleObject(child.as_raw_handle(), 0) {
             WAIT_OBJECT_0 => {}
@@ -178,9 +178,9 @@ pub fn try_wait(child: &process::Child) -> io::Result<Option<ExitStatus>> {
     }
 }
 
-pub type ChildStdin = PollEvented<NamedPipe>;
-pub type ChildStdout = PollEvented<NamedPipe>;
-pub type ChildStderr = PollEvented<NamedPipe>;
+pub(crate) type ChildStdin = PollEvented<NamedPipe>;
+pub(crate) type ChildStdout = PollEvented<NamedPipe>;
+pub(crate) type ChildStderr = PollEvented<NamedPipe>;
 
 fn stdio<T>(option: Option<T>, handle: &Handle) -> io::Result<Option<PollEvented<NamedPipe>>>
 where
diff --git a/tokio-reactor/src/lib.rs b/tokio-reactor/src/lib.rs
index d583b1d04..bace8128f 100644
--- a/tokio-reactor/src/lib.rs
+++ b/tokio-reactor/src/lib.rs
@@ -1,5 +1,10 @@
 #![doc(html_root_url = "https://docs.rs/tokio-reactor/0.2.0-alpha.1")]
-#![warn(missing_docs, missing_debug_implementations, rust_2018_idioms)]
+#![warn(
+    missing_debug_implementations,
+    missing_docs,
+    rust_2018_idioms,
+    unreachable_pub
+)]
 #![doc(test(no_crate_inject, attr(deny(rust_2018_idioms))))]
 
 //! Event loop that drives Tokio I/O resources.
@@ -585,11 +590,11 @@ mod platform {
     use mio::unix::UnixReady;
     use mio::Ready;
 
-    pub fn hup() -> Ready {
+    pub(crate) fn hup() -> Ready {
         UnixReady::hup().into()
     }
 
-    pub fn is_hup(ready: Ready) -> bool {
+    pub(crate) fn is_hup(ready: Ready) -> bool {
         UnixReady::from(ready).is_hup()
     }
 }
@@ -598,11 +603,11 @@ mod platform {
 mod platform {
     use mio::Ready;
 
-    pub fn hup() -> Ready {
+    pub(crate) fn hup() -> Ready {
         Ready::empty()
     }
 
-    pub fn is_hup(_: Ready) -> bool {
+    pub(crate) fn is_hup(_: Ready) -> bool {
         false
     }
 }
diff --git a/tokio-reactor/src/sharded_rwlock.rs b/tokio-reactor/src/sharded_rwlock.rs
index ec16fb13c..678924812 100644
--- a/tokio-reactor/src/sharded_rwlock.rs
+++ b/tokio-reactor/src/sharded_rwlock.rs
@@ -30,7 +30,7 @@ use std::thread::{self, ThreadId};
 /// Read operations lock only one shard specific to the current thread, while write operations lock
 /// every shard in succession. This strategy makes concurrent read operations faster due to less
 /// contention, but write operations are slower due to increased amount of locking.
-pub struct RwLock<T> {
+pub(crate) struct RwLock<T> {
     /// A list of locks protecting the internal data.
     shards: Vec<CachePadded<parking_lot::RwLock<()>>>,
 
@@ -43,7 +43,7 @@ unsafe impl<T: Send + Sync> Sync for RwLock<T> {}
 
 impl<T> RwLock<T> {
     /// Creates a new `RwLock` initialized with `value`.
-    pub fn new(value: T) -> RwLock<T> {
+    pub(crate) fn new(value: T) -> RwLock<T> {
         // The number of shards is a power of two so that the modulo operation in `read` becomes a
         // simple bitwise "and".
         let num_shards = num_cpus::get().next_power_of_two();
@@ -65,7 +65,7 @@ impl<T> RwLock<T> {
     /// or writers will acquire the lock first.
     ///
     /// Returns an RAII guard which will release this thread's shared access once it is dropped.
-    pub fn read(&self) -> RwLockReadGuard<'_, T> {
+    pub(crate) fn read(&self) -> RwLockReadGuard<'_, T> {
         // Take the current thread index and map it to a shard index. Thread indices will tend to
         // distribute shards among threads equally, thus reducing contention due to read-locking.
         let shard_index = thread_index() & (self.shards.len() - 1);
@@ -84,7 +84,7 @@ impl<T> RwLock<T> {
     /// the lock.
     ///
     /// Returns an RAII guard which will drop the write access of this rwlock when dropped.
-    pub fn write(&self) -> RwLockWriteGuard<'_, T> {
+    pub(crate) fn write(&self) -> RwLockWriteGuard<'_, T> {
         // Write-lock each shard in succession.
         for shard in &self.shards {
             // The write guard is forgotten, but the lock will be manually unlocked in `drop`.
@@ -99,7 +99,7 @@ impl<T> RwLock<T> {
 }
 
 /// A guard used to release the shared read access of a `RwLock` when dropped.
-pub struct RwLockReadGuard<'a, T> {
+pub(crate) struct RwLockReadGuard<'a, T> {
     parent: &'a RwLock<T>,
     _guard: parking_lot::RwLockReadGuard<'a, ()>,
     _marker: PhantomData<parking_lot::RwLockReadGuard<'a, T>>,
@@ -116,7 +116,7 @@ impl<'a, T> Deref for RwLockReadGuard<'a, T> {
 }
 
 /// A guard used to release the exclusive write access of a `RwLock` when dropped.
-pub struct RwLockWriteGuard<'a, T> {
+pub(crate) struct RwLockWriteGuard<'a, T> {
     parent: &'a RwLock<T>,
     _marker: PhantomData<parking_lot::RwLockWriteGuard<'a, T>>,
 }
@@ -154,7 +154,7 @@ impl<'a, T> DerefMut for RwLockWriteGuard<'a, T> {
 /// between 0 and the number of running threads, but there are no guarantees. During TLS teardown
 /// the associated index might change.
 #[inline]
-pub fn thread_index() -> usize {
+pub(crate) fn thread_index() -> usize {
     REGISTRATION.try_with(|reg| reg.index).unwrap_or(0)
 }
 
diff --git a/tokio-signal/src/lib.rs b/tokio-signal/src/lib.rs
index f7715a77b..36f265cfe 100644
--- a/tokio-signal/src/lib.rs
+++ b/tokio-signal/src/lib.rs
@@ -1,5 +1,10 @@
 #![doc(html_root_url = "https://docs.rs/tokio-signal/0.3.0-alpha.1")]
-#![warn(missing_debug_implementations, missing_docs, rust_2018_idioms)]
+#![warn(
+    missing_debug_implementations,
+    missing_docs,
+    rust_2018_idioms,
+    unreachable_pub
+)]
 #![cfg_attr(test, feature(async_await))]
 #![doc(test(no_crate_inject, attr(deny(rust_2018_idioms))))]
 
diff --git a/tokio-sync/src/lib.rs b/tokio-sync/src/lib.rs
index be71a3e43..3e4f07b16 100644
--- a/tokio-sync/src/lib.rs
+++ b/tokio-sync/src/lib.rs
@@ -2,8 +2,8 @@
 #![warn(
     missing_debug_implementations,
     missing_docs,
-    unreachable_pub,
-    rust_2018_idioms
+    rust_2018_idioms,
+    unreachable_pub
 )]
 #![doc(test(no_crate_inject, attr(deny(rust_2018_idioms))))]
 #![feature(async_await)]
diff --git a/tokio-tcp/src/lib.rs b/tokio-tcp/src/lib.rs
index 1e8ca2f50..bcca739f0 100644
--- a/tokio-tcp/src/lib.rs
+++ b/tokio-tcp/src/lib.rs
@@ -1,5 +1,10 @@
 #![doc(html_root_url = "https://docs.rs/tokio-tcp/0.2.0-alpha.1")]
-#![warn(missing_docs, missing_debug_implementations, rust_2018_idioms)]
+#![warn(
+    missing_debug_implementations,
+    missing_docs,
+    rust_2018_idioms,
+    unreachable_pub
+)]
 #![doc(test(no_crate_inject, attr(deny(rust_2018_idioms))))]
 #![feature(async_await)]
 
diff --git a/tokio-test/src/lib.rs b/tokio-test/src/lib.rs
index 4d8539bd4..6e6a82ad4 100644
--- a/tokio-test/src/lib.rs
+++ b/tokio-test/src/lib.rs
@@ -1,9 +1,9 @@
 #![doc(html_root_url = "https://docs.rs/tokio-test/0.2.0-alpha.1")]
 #![warn(
-    missing_docs,
     missing_debug_implementations,
-    unreachable_pub,
-    rust_2018_idioms
+    missing_docs,
+    rust_2018_idioms,
+    unreachable_pub
 )]
 #![doc(test(no_crate_inject, attr(deny(rust_2018_idioms))))]
 
diff --git a/tokio-threadpool/src/callback.rs b/tokio-threadpool/src/callback.rs
index fe28ed712..b9d101615 100644
--- a/tokio-threadpool/src/callback.rs
+++ b/tokio-threadpool/src/callback.rs
@@ -8,14 +8,14 @@ pub(crate) struct Callback {
 }
 
 impl Callback {
-    pub fn new<F>(f: F) -> Self
+    pub(crate) fn new<F>(f: F) -> Self
     where
         F: Fn(&Worker) + Send + Sync + 'static,
     {
         Callback { f: Arc::new(f) }
     }
 
-    pub fn call(&self, worker: &Worker) {
+    pub(crate) fn call(&self, worker: &Worker) {
         (self.f)(worker)
     }
 }
diff --git a/tokio-threadpool/src/config.rs b/tokio-threadpool/src/config.rs
index 31a951cec..e92d2c607 100644
--- a/tokio-threadpool/src/config.rs
+++ b/tokio-threadpool/src/config.rs
@@ -7,14 +7,14 @@ use std::time::Duration;
 /// Thread pool specific configuration values
 #[derive(Clone)]
 pub(crate) struct Config {
-    pub keep_alive: Option<Duration>,
+    pub(crate) keep_alive: Option<Duration>,
     // Used to configure a worker thread
-    pub name_prefix: Option<String>,
-    pub stack_size: Option<usize>,
-    pub around_worker: Option<Callback>,
-    pub after_start: Option<Arc<dyn Fn() + Send + Sync>>,
-    pub before_stop: Option<Arc<dyn Fn() + Send + Sync>>,
-    pub panic_handler: Option<PanicHandler>,
+    pub(crate) name_prefix: Option<String>,
+    pub(crate) stack_size: Option<usize>,
+    pub(crate) around_worker: Option<Callback>,
+    pub(crate) after_start: Option<Arc<dyn Fn() + Send + Sync>>,
+    pub(crate) before_stop: Option<Arc<dyn Fn() + Send + Sync>>,
+    pub(crate) panic_handler: Option<PanicHandler>,
 }
 
 // Define type alias to avoid clippy::type_complexity.
diff --git a/tokio-threadpool/src/lib.rs b/tokio-threadpool/src/lib.rs
index 745e46c47..0ce42b6c1 100644
--- a/tokio-threadpool/src/lib.rs
+++ b/tokio-threadpool/src/lib.rs
@@ -1,5 +1,10 @@
 #![doc(html_root_url = "https://docs.rs/tokio-threadpool/0.2.0-alpha.1")]
-#![warn(missing_docs, missing_debug_implementations, rust_2018_idioms)]
+#![warn(
+    missing_debug_implementations,
+    missing_docs,
+    rust_2018_idioms,
+    unreachable_pub
+)]
 #![doc(test(no_crate_inject, attr(deny(rust_2018_idioms))))]
 
 //! A work-stealing based thread pool for executing futures.
diff --git a/tokio-threadpool/src/park/boxed.rs b/tokio-threadpool/src/park/boxed.rs
index d4daf8333..6893c2f23 100644
--- a/tokio-threadpool/src/park/boxed.rs
+++ b/tokio-threadpool/src/park/boxed.rs
@@ -9,7 +9,7 @@ pub(crate) type BoxUnpark = Box<dyn Unpark>;
 pub(crate) struct BoxedPark<T>(T);
 
 impl<T> BoxedPark<T> {
-    pub fn new(inner: T) -> Self {
+    pub(crate) fn new(inner: T) -> Self {
         BoxedPark(inner)
     }
 }
diff --git a/tokio-threadpool/src/pool/backup.rs b/tokio-threadpool/src/pool/backup.rs
index bba3a4f5c..dc2aadea3 100644
--- a/tokio-threadpool/src/pool/backup.rs
+++ b/tokio-threadpool/src/pool/backup.rs
@@ -67,18 +67,18 @@ struct State(usize);
 /// This flag also serves as a "notification" bit. If another thread is
 /// attempting to hand off a worker to the backup thread, then the pushed bit
 /// will not be set when the thread tries to shutdown.
-pub const PUSHED: usize = 0b001;
+pub(crate) const PUSHED: usize = 0b001;
 
 /// Set when the thread is running
-pub const RUNNING: usize = 0b010;
+pub(crate) const RUNNING: usize = 0b010;
 
 /// Set when the thread pool has terminated
-pub const TERMINATED: usize = 0b100;
+pub(crate) const TERMINATED: usize = 0b100;
 
 // ===== impl Backup =====
 
 impl Backup {
-    pub fn new() -> Backup {
+    pub(crate) fn new() -> Backup {
         Backup {
             handoff: UnsafeCell::new(None),
             state: AtomicUsize::new(State::new().into()),
@@ -88,7 +88,7 @@ impl Backup {
     }
 
     /// Called when the thread is starting
-    pub fn start(&self, worker_id: &WorkerId) {
+    pub(crate) fn start(&self, worker_id: &WorkerId) {
         debug_assert!({
             let state: State = self.state.load(Relaxed).into();
 
@@ -107,7 +107,7 @@ impl Backup {
         }
     }
 
-    pub fn is_running(&self) -> bool {
+    pub(crate) fn is_running(&self) -> bool {
         let state: State = self.state.load(Relaxed).into();
         state.is_running()
     }
@@ -115,7 +115,7 @@ impl Backup {
     /// Hands off the worker to a thread.
     ///
     /// Returns `true` if the thread needs to be spawned.
-    pub fn worker_handoff(&self, worker_id: WorkerId) -> bool {
+    pub(crate) fn worker_handoff(&self, worker_id: WorkerId) -> bool {
         unsafe {
             // The backup worker should not already have been handoff a worker.
             debug_assert!((*self.handoff.get()).is_none());
@@ -139,7 +139,7 @@ impl Backup {
     }
 
     /// Terminate the worker
-    pub fn signal_stop(&self) {
+    pub(crate) fn signal_stop(&self) {
         let prev: State = self.state.fetch_xor(TERMINATED | PUSHED, AcqRel).into();
 
         debug_assert!(!prev.is_terminated());
@@ -151,14 +151,14 @@ impl Backup {
     }
 
     /// Release the worker
-    pub fn release(&self) {
+    pub(crate) fn release(&self) {
         let prev: State = self.state.fetch_xor(RUNNING, AcqRel).into();
 
         debug_assert!(prev.is_running());
     }
 
     /// Wait for a worker handoff
-    pub fn wait_for_handoff(&self, timeout: Option<Duration>) -> Handoff {
+    pub(crate) fn wait_for_handoff(&self, timeout: Option<Duration>) -> Handoff {
         let sleep_until = timeout.map(|dur| Instant::now() + dur);
         let mut state: State = self.state.load(Acquire).into();
 
@@ -208,23 +208,23 @@ impl Backup {
         }
     }
 
-    pub fn is_pushed(&self) -> bool {
+    pub(crate) fn is_pushed(&self) -> bool {
         let state: State = self.state.load(Relaxed).into();
         state.is_pushed()
     }
 
-    pub fn set_pushed(&self, ordering: Ordering) {
+    pub(crate) fn set_pushed(&self, ordering: Ordering) {
         let prev: State = self.state.fetch_or(PUSHED, ordering).into();
         debug_assert!(!prev.is_pushed());
     }
 
     #[inline]
-    pub fn next_sleeper(&self) -> BackupId {
+    pub(crate) fn next_sleeper(&self) -> BackupId {
         unsafe { *self.next_sleeper.get() }
     }
 
     #[inline]
-    pub fn set_next_sleeper(&self, val: BackupId) {
+    pub(crate) fn set_next_sleeper(&self, val: BackupId) {
         unsafe {
             *self.next_sleeper.get() = val;
         }
diff --git a/tokio-threadpool/src/pool/backup_stack.rs b/tokio-threadpool/src/pool/backup_stack.rs
index 52d7c3de7..f63a0b130 100644
--- a/tokio-threadpool/src/pool/backup_stack.rs
+++ b/tokio-threadpool/src/pool/backup_stack.rs
@@ -34,7 +34,7 @@ const ABA_GUARD_MASK: usize = (1 << (32 - ABA_GUARD_SHIFT)) - 1;
 // ===== impl BackupStack =====
 
 impl BackupStack {
-    pub fn new() -> BackupStack {
+    pub(crate) fn new() -> BackupStack {
         let state = AtomicUsize::new(State::new().into());
         BackupStack { state }
     }
@@ -47,7 +47,7 @@ impl BackupStack {
     ///
     /// Returns `Err` if the pool has transitioned to the `TERMINATED` state.
     /// When terminated, pushing new entries is no longer permitted.
-    pub fn push(&self, entries: &[Backup], id: BackupId) -> Result<(), ()> {
+    pub(crate) fn push(&self, entries: &[Backup], id: BackupId) -> Result<(), ()> {
         let mut state: State = self.state.load(Acquire).into();
 
         entries[id.0].set_pushed(AcqRel);
@@ -91,7 +91,7 @@ impl BackupStack {
     ///
     /// * `Ok(None)` if the stack is empty.
     /// * `Err(_)` is returned if the pool has been shutdown.
-    pub fn pop(&self, entries: &[Backup], terminate: bool) -> Result<Option<BackupId>, ()> {
+    pub(crate) fn pop(&self, entries: &[Backup], terminate: bool) -> Result<Option<BackupId>, ()> {
         // Figure out the empty value
         let terminal = if terminate { TERMINATED } else { EMPTY };
 
diff --git a/tokio-threadpool/src/pool/mod.rs b/tokio-threadpool/src/pool/mod.rs
index 62d880d60..7b347eea0 100644
--- a/tokio-threadpool/src/pool/mod.rs
+++ b/tokio-threadpool/src/pool/mod.rs
@@ -38,7 +38,7 @@ pub(crate) struct Pool {
     //
     // The value of this atomic is deserialized into a `pool::State` instance.
     // See comments for that type.
-    pub state: CachePadded<AtomicUsize>,
+    pub(crate) state: CachePadded<AtomicUsize>,
 
     // Stack tracking sleeping workers.
     sleep_stack: CachePadded<worker::Stack>,
@@ -49,19 +49,19 @@ pub(crate) struct Pool {
     // futures.
     //
     // The number of workers will *usually* be small.
-    pub workers: Arc<[worker::Entry]>,
+    pub(crate) workers: Arc<[worker::Entry]>,
 
     // The global MPMC queue of tasks.
     //
     // Spawned tasks are pushed into this queue. Although worker threads have their own dedicated
     // task queues, they periodically steal tasks from this global queue, too.
-    pub queue: Arc<Injector<Arc<Task>>>,
+    pub(crate) queue: Arc<Injector<Arc<Task>>>,
 
     // Completes the shutdown process when the `ThreadPool` and all `Worker`s get dropped.
     //
     // When spawning a new `Worker`, this weak reference is upgraded and handed out to the new
     // thread.
-    pub trigger: Weak<ShutdownTrigger>,
+    pub(crate) trigger: Weak<ShutdownTrigger>,
 
     // Backup thread state
     //
@@ -71,19 +71,19 @@ pub(crate) struct Pool {
     backup: Box<[Backup]>,
 
     // Stack of sleeping backup threads
-    pub backup_stack: BackupStack,
+    pub(crate) backup_stack: BackupStack,
 
     // State regarding coordinating blocking sections and tracking tasks that
     // are pending blocking capacity.
     blocking: Blocking,
 
     // Configuration
-    pub config: Config,
+    pub(crate) config: Config,
 }
 
 impl Pool {
     /// Create a new `Pool`
-    pub fn new(
+    pub(crate) fn new(
         workers: Arc<[worker::Entry]>,
         trigger: Weak<ShutdownTrigger>,
         max_blocking: usize,
@@ -133,7 +133,7 @@ impl Pool {
 
     /// Start shutting down the pool. This means that no new futures will be
     /// accepted.
-    pub fn shutdown(&self, now: bool, purge_queue: bool) {
+    pub(crate) fn shutdown(&self, now: bool, purge_queue: bool) {
         let mut state: State = self.state.load(Acquire).into();
 
         trace!("shutdown; state={:?}", state);
@@ -198,11 +198,11 @@ impl Pool {
     /// Called by `Worker` as it tries to enter a sleeping state. Before it
     /// sleeps, it must push itself onto the sleep stack. This enables other
     /// threads to see it when signaling work.
-    pub fn push_sleeper(&self, idx: usize) -> Result<(), ()> {
+    pub(crate) fn push_sleeper(&self, idx: usize) -> Result<(), ()> {
         self.sleep_stack.push(&self.workers, idx)
     }
 
-    pub fn terminate_sleeping_workers(&self) {
+    pub(crate) fn terminate_sleeping_workers(&self) {
         use crate::worker::Lifecycle::Signaled;
 
         trace!("  -> shutting down workers");
@@ -222,7 +222,7 @@ impl Pool {
         }
     }
 
-    pub fn poll_blocking_capacity(
+    pub(crate) fn poll_blocking_capacity(
         &self,
         task: &Arc<Task>,
     ) -> Poll<Result<(), crate::BlockingError>> {
@@ -233,7 +233,7 @@ impl Pool {
     ///
     /// Called from either inside or outside of the scheduler. If currently on
     /// the scheduler, then a fast path is taken.
-    pub fn submit(&self, task: Arc<Task>, pool: &Arc<Pool>) {
+    pub(crate) fn submit(&self, task: Arc<Task>, pool: &Arc<Pool>) {
         debug_assert_eq!(*self, **pool);
 
         Worker::with_current(|worker| {
@@ -265,7 +265,7 @@ impl Pool {
     ///
     /// Called from outside of the scheduler, this function is how new tasks
     /// enter the system.
-    pub fn submit_external(&self, task: Arc<Task>, pool: &Arc<Pool>) {
+    pub(crate) fn submit_external(&self, task: Arc<Task>, pool: &Arc<Pool>) {
         debug_assert_eq!(*self, **pool);
 
         trace!("    -> submit external");
@@ -274,7 +274,7 @@ impl Pool {
         self.signal_work(pool);
     }
 
-    pub fn release_backup(&self, backup_id: BackupId) -> Result<(), ()> {
+    pub(crate) fn release_backup(&self, backup_id: BackupId) -> Result<(), ()> {
         // First update the state, this cannot fail because the caller must have
         // exclusive access to the backup token.
         self.backup[backup_id.0].release();
@@ -283,13 +283,13 @@ impl Pool {
         self.backup_stack.push(&self.backup, backup_id)
     }
 
-    pub fn notify_blocking_task(&self, pool: &Arc<Pool>) {
+    pub(crate) fn notify_blocking_task(&self, pool: &Arc<Pool>) {
         debug_assert_eq!(*self, **pool);
         self.blocking.notify_task(&pool);
     }
 
     /// Provision a thread to run a worker
-    pub fn spawn_thread(&self, id: WorkerId, pool: &Arc<Pool>) {
+    pub(crate) fn spawn_thread(&self, id: WorkerId, pool: &Arc<Pool>) {
         debug_assert_eq!(*self, **pool);
 
         let backup_id = match self.backup_stack.pop(&self.backup, false) {
@@ -396,7 +396,7 @@ impl Pool {
 
     /// If there are any other workers currently relaxing, signal them that work
     /// is available so that they can try to find more work to process.
-    pub fn signal_work(&self, pool: &Arc<Pool>) {
+    pub(crate) fn signal_work(&self, pool: &Arc<Pool>) {
         debug_assert_eq!(*self, **pool);
 
         use crate::worker::Lifecycle::Signaled;
@@ -422,7 +422,7 @@ impl Pool {
     /// Generates a random number
     ///
     /// Uses a thread-local random number generator based on XorShift.
-    pub fn rand_usize(&self) -> usize {
+    pub(crate) fn rand_usize(&self) -> usize {
         thread_local! {
             static RNG: Cell<Wrapping<u32>> = Cell::new(Wrapping(prng_seed()));
         }
diff --git a/tokio-threadpool/src/task/blocking.rs b/tokio-threadpool/src/task/blocking.rs
index 2640149f0..92d985b24 100644
--- a/tokio-threadpool/src/task/blocking.rs
+++ b/tokio-threadpool/src/task/blocking.rs
@@ -85,7 +85,7 @@ const NUM_SHIFT: usize = 1;
 //
 impl Blocking {
     /// Create a new `Blocking`.
-    pub fn new(capacity: usize) -> Blocking {
+    pub(crate) fn new(capacity: usize) -> Blocking {
         assert!(capacity > 0, "blocking capacity must be greater than zero");
 
         let stub = Box::new(Task::stub());
@@ -110,7 +110,7 @@ impl Blocking {
     ///
     /// The caller must ensure that `task` has not previously been queued to be
     /// notified when capacity becomes available.
-    pub fn poll_blocking_capacity(
+    pub(crate) fn poll_blocking_capacity(
         &self,
         task: &Arc<Task>,
     ) -> Poll<Result<(), crate::BlockingError>> {
@@ -243,7 +243,7 @@ impl Blocking {
         (*prev).next_blocking.store(task, Release);
     }
 
-    pub fn notify_task(&self, pool: &Arc<Pool>) {
+    pub(crate) fn notify_task(&self, pool: &Arc<Pool>) {
         let prev = self.lock.fetch_add(1, AcqRel);
 
         if prev != 0 {
diff --git a/tokio-threadpool/src/task/mod.rs b/tokio-threadpool/src/task/mod.rs
index 2a225a145..480152bbe 100644
--- a/tokio-threadpool/src/task/mod.rs
+++ b/tokio-threadpool/src/task/mod.rs
@@ -40,13 +40,13 @@ pub(crate) struct Task {
     ///
     /// The worker ID is represented by a `u32` rather than `usize` in order to save some space
     /// on 64-bit platforms.
-    pub reg_worker: Cell<Option<u32>>,
+    pub(crate) reg_worker: Cell<Option<u32>>,
 
     /// The key associated with this task in the `Slab` it was registered in.
     ///
     /// This field can be a `Cell` because it's only accessed by the worker thread that has
     /// registered the task.
-    pub reg_index: Cell<usize>,
+    pub(crate) reg_index: Cell<usize>,
 
     /// Store the future at the head of the struct
     ///
@@ -67,7 +67,7 @@ type BoxFuture = Pin<Box<dyn Future<Output = ()> + Send + 'static>>;
 
 impl Task {
     /// Create a new `Task` as a harness for `future`.
-    pub fn new(future: BoxFuture) -> Task {
+    pub(crate) fn new(future: BoxFuture) -> Task {
         Task {
             state: AtomicUsize::new(State::new().into()),
             blocking: AtomicUsize::new(BlockingState::new().into()),
@@ -95,7 +95,7 @@ impl Task {
 
     /// Execute the task returning `Run::Schedule` if the task needs to be
     /// scheduled again.
-    pub fn run(me: &Arc<Task>, pool: &Arc<Pool>) -> Run {
+    pub(crate) fn run(me: &Arc<Task>, pool: &Arc<Pool>) -> Run {
         use self::State::*;
 
         // Transition task to running state. At this point, the task must be
@@ -200,7 +200,7 @@ impl Task {
     ///
     /// This is called when the threadpool shuts down and the task has already beed polled but not
     /// completed.
-    pub fn abort(&self) {
+    pub(crate) fn abort(&self) {
         use self::State::*;
 
         let mut state = self.state.load(Acquire).into();
@@ -232,12 +232,12 @@ impl Task {
     }
 
     /// Notify the task it has been allocated blocking capacity
-    pub fn notify_blocking(me: Arc<Task>, pool: &Arc<Pool>) {
+    pub(crate) fn notify_blocking(me: Arc<Task>, pool: &Arc<Pool>) {
         BlockingState::notify_blocking(&me.blocking, AcqRel);
         Task::schedule(&me, pool);
     }
 
-    pub fn schedule(me: &Arc<Self>, pool: &Arc<Pool>) {
+    pub(crate) fn schedule(me: &Arc<Self>, pool: &Arc<Pool>) {
         if me.schedule2() {
             let task = me.clone();
             pool.submit(task, &pool);
@@ -281,7 +281,7 @@ impl Task {
     /// Consumes any allocated capacity to block.
     ///
     /// Returns `true` if capacity was allocated, `false` otherwise.
-    pub fn consume_blocking_allocation(&self) -> CanBlock {
+    pub(crate) fn consume_blocking_allocation(&self) -> CanBlock {
         // This flag is the primary point of coordination. The queued flag
         // happens "around" setting the blocking capacity.
         BlockingState::consume_allocation(&self.blocking, AcqRel)
diff --git a/tokio-threadpool/src/waker.rs b/tokio-threadpool/src/waker.rs
index 258a82a21..b1fd97d4c 100644
--- a/tokio-threadpool/src/waker.rs
+++ b/tokio-threadpool/src/waker.rs
@@ -10,8 +10,8 @@ use std::sync::Arc;
 /// to poll the future again.
 #[derive(Debug)]
 pub(crate) struct Waker {
-    pub pool: Arc<Pool>,
-    pub task: Arc<Task>,
+    pub(crate) pool: Arc<Pool>,
+    pub(crate) task: Arc<Task>,
 }
 
 unsafe impl Send for Waker {}
diff --git a/tokio-threadpool/src/worker/entry.rs b/tokio-threadpool/src/worker/entry.rs
index 199b9ba16..66ae1d670 100644
--- a/tokio-threadpool/src/worker/entry.rs
+++ b/tokio-threadpool/src/worker/entry.rs
@@ -21,13 +21,13 @@ pub(crate) struct WorkerEntry {
     //
     // The `usize` value is deserialized to a `worker::State` instance. See
     // comments on that type.
-    pub state: CachePadded<AtomicUsize>,
+    pub(crate) state: CachePadded<AtomicUsize>,
 
     // Next entry in the parked Trieber stack
     next_sleeper: UnsafeCell<usize>,
 
     // Worker half of deque
-    pub worker: Worker<Arc<Task>>,
+    pub(crate) worker: Worker<Arc<Task>>,
 
     // Stealer half of deque
     stealer: Stealer<Arc<Task>>,
@@ -50,7 +50,7 @@ pub(crate) struct WorkerEntry {
 }
 
 impl WorkerEntry {
-    pub fn new(park: BoxPark, unpark: BoxUnpark) -> Self {
+    pub(crate) fn new(park: BoxPark, unpark: BoxUnpark) -> Self {
         let w = Worker::new_fifo();
         let s = w.stealer();
 
@@ -76,14 +76,14 @@ impl WorkerEntry {
     /// # Ordering
     ///
     /// The specified ordering is established on the entry's state variable.
-    pub fn fetch_unset_pushed(&self, ordering: Ordering) -> State {
+    pub(crate) fn fetch_unset_pushed(&self, ordering: Ordering) -> State {
         self.state.fetch_and(!PUSHED_MASK, ordering).into()
     }
 
     /// Submit a task to this worker while currently on the same thread that is
     /// running the worker.
     #[inline]
-    pub fn submit_internal(&self, task: Arc<Task>) {
+    pub(crate) fn submit_internal(&self, task: Arc<Task>) {
         self.push_internal(task);
     }
 
@@ -93,7 +93,7 @@ impl WorkerEntry {
     ///
     /// The `state` must have been obtained with an `Acquire` ordering.
     #[inline]
-    pub fn notify(&self, mut state: State) -> bool {
+    pub(crate) fn notify(&self, mut state: State) -> bool {
         use crate::worker::Lifecycle::*;
 
         loop {
@@ -138,7 +138,7 @@ impl WorkerEntry {
     /// Returns `Ok` when the worker was successfully signaled.
     ///
     /// Returns `Err` if the worker has already terminated.
-    pub fn signal_stop(&self, mut state: State) {
+    pub(crate) fn signal_stop(&self, mut state: State) {
         use crate::worker::Lifecycle::*;
 
         // Transition the worker state to signaled
@@ -189,7 +189,7 @@ impl WorkerEntry {
     /// This **must** only be called by the thread that owns the worker entry.
     /// This function is not `Sync`.
     #[inline]
-    pub fn pop_task(&self) -> Option<Arc<Task>> {
+    pub(crate) fn pop_task(&self) -> Option<Arc<Task>> {
         self.worker.pop()
     }
 
@@ -201,26 +201,26 @@ impl WorkerEntry {
     /// At the same time, this method steals some additional tasks and moves
     /// them into `dest` in order to balance the work distribution among
     /// workers.
-    pub fn steal_tasks(&self, dest: &Self) -> Steal<Arc<Task>> {
+    pub(crate) fn steal_tasks(&self, dest: &Self) -> Steal<Arc<Task>> {
         self.stealer.steal_batch_and_pop(&dest.worker)
     }
 
     /// Drain (and drop) all tasks that are queued for work.
     ///
     /// This is called when the pool is shutting down.
-    pub fn drain_tasks(&self) {
+    pub(crate) fn drain_tasks(&self) {
         while self.worker.pop().is_some() {}
     }
 
     /// Parks the worker thread.
-    pub fn park(&self) {
+    pub(crate) fn park(&self) {
         if let Some(park) = unsafe { (*self.park.get()).as_mut() } {
             park.park().unwrap();
         }
     }
 
     /// Parks the worker thread for at most `duration`.
-    pub fn park_timeout(&self, duration: Duration) {
+    pub(crate) fn park_timeout(&self, duration: Duration) {
         if let Some(park) = unsafe { (*self.park.get()).as_mut() } {
             park.park_timeout(duration).unwrap();
         }
@@ -228,7 +228,7 @@ impl WorkerEntry {
 
     /// Unparks the worker thread.
     #[inline]
-    pub fn unpark(&self) {
+    pub(crate) fn unpark(&self) {
         if let Some(park) = unsafe { (*self.unpark.get()).as_ref() } {
             park.unpark();
         }
@@ -238,7 +238,7 @@ impl WorkerEntry {
     ///
     /// Called when the task is being polled for the first time.
     #[inline]
-    pub fn register_task(&self, task: &Arc<Task>) {
+    pub(crate) fn register_task(&self, task: &Arc<Task>) {
         let running_tasks = unsafe { &mut *self.running_tasks.get() };
 
         let key = running_tasks.insert(task.clone());
@@ -249,7 +249,7 @@ impl WorkerEntry {
     ///
     /// Called when the task is completed and was previously registered in this worker.
     #[inline]
-    pub fn unregister_task(&self, task: Arc<Task>) {
+    pub(crate) fn unregister_task(&self, task: Arc<Task>) {
         let running_tasks = unsafe { &mut *self.running_tasks.get() };
         running_tasks.remove(task.reg_index.get());
         self.drain_remotely_completed_tasks();
@@ -260,7 +260,7 @@ impl WorkerEntry {
     /// Called when the task is completed by another worker and was previously registered in this
     /// worker.
     #[inline]
-    pub fn remotely_complete_task(&self, task: Arc<Task>) {
+    pub(crate) fn remotely_complete_task(&self, task: Arc<Task>) {
         self.remotely_completed_tasks.push(task);
         self.needs_drain.store(true, Release);
     }
@@ -268,7 +268,7 @@ impl WorkerEntry {
     /// Drops the remaining incomplete tasks and the parker associated with this worker.
     ///
     /// This function is called by the shutdown trigger.
-    pub fn shutdown(&self) {
+    pub(crate) fn shutdown(&self) {
         self.drain_remotely_completed_tasks();
 
         // Abort all incomplete tasks.
@@ -297,17 +297,17 @@ impl WorkerEntry {
     }
 
     #[inline]
-    pub fn push_internal(&self, task: Arc<Task>) {
+    pub(crate) fn push_internal(&self, task: Arc<Task>) {
         self.worker.push(task);
     }
 
     #[inline]
-    pub fn next_sleeper(&self) -> usize {
+    pub(crate) fn next_sleeper(&self) -> usize {
         unsafe { *self.next_sleeper.get() }
     }
 
     #[inline]
-    pub fn set_next_sleeper(&self, val: usize) {
+    pub(crate) fn set_next_sleeper(&self, val: usize) {
         unsafe {
             *self.next_sleeper.get() = val;
         }
diff --git a/tokio-threadpool/src/worker/stack.rs b/tokio-threadpool/src/worker/stack.rs
index 1d4dfad9d..47c9cdbab 100644
--- a/tokio-threadpool/src/worker/stack.rs
+++ b/tokio-threadpool/src/worker/stack.rs
@@ -58,7 +58,7 @@ const ABA_GUARD_MASK: usize = (1 << (32 - ABA_GUARD_SHIFT)) - 1;
 
 impl Stack {
     /// Create a new `Stack` representing the empty state.
-    pub fn new() -> Stack {
+    pub(crate) fn new() -> Stack {
         let state = AtomicUsize::new(State::new().into());
         Stack { state }
     }
@@ -71,7 +71,7 @@ impl Stack {
     ///
     /// Returns `Err` if the pool has transitioned to the `TERMINATED` state.
     /// When terminated, pushing new entries is no longer permitted.
-    pub fn push(&self, entries: &[worker::Entry], idx: usize) -> Result<(), ()> {
+    pub(crate) fn push(&self, entries: &[worker::Entry], idx: usize) -> Result<(), ()> {
         let mut state: State = self.state.load(Acquire).into();
 
         debug_assert!(worker::State::from(entries[idx].state.load(Relaxed)).is_pushed());
@@ -113,7 +113,7 @@ impl Stack {
     /// Returns the index of the popped worker and the worker's observed state.
     ///
     /// `None` if the stack is empty.
-    pub fn pop(
+    pub(crate) fn pop(
         &self,
         entries: &[worker::Entry],
         max_lifecycle: worker::Lifecycle,
diff --git a/tokio-threadpool/src/worker/state.rs b/tokio-threadpool/src/worker/state.rs
index e8d35c332..68b5bc477 100644
--- a/tokio-threadpool/src/worker/state.rs
+++ b/tokio-threadpool/src/worker/state.rs
@@ -35,15 +35,15 @@ pub(crate) enum Lifecycle {
 
 impl State {
     /// Returns true if the worker entry is pushed in the sleeper stack
-    pub fn is_pushed(self) -> bool {
+    pub(crate) fn is_pushed(self) -> bool {
         self.0 & PUSHED_MASK == PUSHED_MASK
     }
 
-    pub fn set_pushed(&mut self) {
+    pub(crate) fn set_pushed(&mut self) {
         self.0 |= PUSHED_MASK
     }
 
-    pub fn is_notified(self) -> bool {
+    pub(crate) fn is_notified(self) -> bool {
         use self::Lifecycle::*;
 
         match self.lifecycle() {
@@ -52,19 +52,19 @@ impl State {
         }
     }
 
-    pub fn lifecycle(self) -> Lifecycle {
+    pub(crate) fn lifecycle(self) -> Lifecycle {
         Lifecycle::from(self.0 & LIFECYCLE_MASK)
     }
 
-    pub fn set_lifecycle(&mut self, val: Lifecycle) {
+    pub(crate) fn set_lifecycle(&mut self, val: Lifecycle) {
         self.0 = (self.0 & !LIFECYCLE_MASK) | (val as usize)
     }
 
-    pub fn is_signaled(self) -> bool {
+    pub(crate) fn is_signaled(self) -> bool {
         self.lifecycle() == Lifecycle::Signaled
     }
 
-    pub fn notify(&mut self) {
+    pub(crate) fn notify(&mut self) {
         use self::Lifecycle::Signaled;
 
         if self.lifecycle() != Signaled {
diff --git a/tokio-timer/src/lib.rs b/tokio-timer/src/lib.rs
index 2541f03e4..a9dc07dcc 100644
--- a/tokio-timer/src/lib.rs
+++ b/tokio-timer/src/lib.rs
@@ -1,5 +1,10 @@
 #![doc(html_root_url = "https://docs.rs/tokio-timer/0.3.0-alpha.1")]
-#![warn(missing_docs, missing_debug_implementations, rust_2018_idioms)]
+#![warn(
+    missing_debug_implementations,
+    missing_docs,
+    rust_2018_idioms,
+    unreachable_pub
+)]
 #![doc(test(no_crate_inject, attr(deny(rust_2018_idioms))))]
 #![feature(async_await)]
 
diff --git a/tokio-timer/src/timer/atomic_stack.rs b/tokio-timer/src/timer/atomic_stack.rs
index 6e091cbd9..0574e939a 100644
--- a/tokio-timer/src/timer/atomic_stack.rs
+++ b/tokio-timer/src/timer/atomic_stack.rs
@@ -22,7 +22,7 @@ pub(crate) struct AtomicStackEntries {
 const SHUTDOWN: *mut Entry = 1 as *mut _;
 
 impl AtomicStack {
-    pub fn new() -> AtomicStack {
+    pub(crate) fn new() -> AtomicStack {
         AtomicStack {
             head: AtomicPtr::new(ptr::null_mut()),
         }
@@ -32,7 +32,7 @@ impl AtomicStack {
     ///
     /// Returns `true` if the entry was pushed, `false` if the entry is already
     /// on the stack, `Err` if the timer is shutdown.
-    pub fn push(&self, entry: &Arc<Entry>) -> Result<bool, Error> {
+    pub(crate) fn push(&self, entry: &Arc<Entry>) -> Result<bool, Error> {
         // First, set the queued bit on the entry
         let queued = entry.queued.fetch_or(true, SeqCst);
 
@@ -72,14 +72,14 @@ impl AtomicStack {
     }
 
     /// Take all entries from the stack
-    pub fn take(&self) -> AtomicStackEntries {
+    pub(crate) fn take(&self) -> AtomicStackEntries {
         let ptr = self.head.swap(ptr::null_mut(), SeqCst);
         AtomicStackEntries { ptr }
     }
 
     /// Drain all remaining nodes in the stack and prevent any new nodes from
     /// being pushed onto the stack.
-    pub fn shutdown(&self) {
+    pub(crate) fn shutdown(&self) {
         // Shutdown the processing queue
         let ptr = self.head.swap(SHUTDOWN, SeqCst);
 
diff --git a/tokio-timer/src/timer/entry.rs b/tokio-timer/src/timer/entry.rs
index 650ee071b..219d027b9 100644
--- a/tokio-timer/src/timer/entry.rs
+++ b/tokio-timer/src/timer/entry.rs
@@ -104,7 +104,7 @@ const ERROR: u64 = u64::MAX;
 // ===== impl Entry =====
 
 impl Entry {
-    pub fn new(deadline: Instant, duration: Duration) -> Entry {
+    pub(crate) fn new(deadline: Instant, duration: Duration) -> Entry {
         Entry {
             time: CachePadded::new(UnsafeCell::new(Time { deadline, duration })),
             inner: None,
@@ -119,24 +119,24 @@ impl Entry {
     }
 
     /// Only called by `Registration`
-    pub fn time_ref(&self) -> &Time {
+    pub(crate) fn time_ref(&self) -> &Time {
         unsafe { &*self.time.get() }
     }
 
     /// Only called by `Registration`
     #[allow(clippy::mut_from_ref)] // https://github.com/rust-lang/rust-clippy/issues/4281
-    pub unsafe fn time_mut(&self) -> &mut Time {
+    pub(crate) unsafe fn time_mut(&self) -> &mut Time {
         &mut *self.time.get()
     }
 
     /// Returns `true` if the `Entry` is currently associated with a timer
     /// instance.
-    pub fn is_registered(&self) -> bool {
+    pub(crate) fn is_registered(&self) -> bool {
         self.inner.is_some()
     }
 
     /// Only called by `Registration`
-    pub fn register(me: &mut Arc<Self>) {
+    pub(crate) fn register(me: &mut Arc<Self>) {
         let handle = match HandlePriv::try_current() {
             Ok(handle) => handle,
             Err(_) => {
@@ -152,7 +152,7 @@ impl Entry {
     }
 
     /// Only called by `Registration`
-    pub fn register_with(me: &mut Arc<Self>, handle: HandlePriv) {
+    pub(crate) fn register_with(me: &mut Arc<Self>, handle: HandlePriv) {
         assert!(!me.is_registered(), "only register an entry once");
 
         let deadline = me.time_ref().deadline;
@@ -202,18 +202,18 @@ impl Entry {
 
     /// The current entry state as known by the timer. This is not the value of
     /// `state`, but lets the timer know how to converge its state to `state`.
-    pub fn when_internal(&self) -> Option<u64> {
+    pub(crate) fn when_internal(&self) -> Option<u64> {
         unsafe { (*self.when.get()) }
     }
 
-    pub fn set_when_internal(&self, when: Option<u64>) {
+    pub(crate) fn set_when_internal(&self, when: Option<u64>) {
         unsafe {
             (*self.when.get()) = when;
         }
     }
 
     /// Called by `Timer` to load the current value of `state` for processing
-    pub fn load_state(&self) -> Option<u64> {
+    pub(crate) fn load_state(&self) -> Option<u64> {
         let state = self.state.load(SeqCst);
 
         if is_elapsed(state) {
@@ -223,12 +223,12 @@ impl Entry {
         }
     }
 
-    pub fn is_elapsed(&self) -> bool {
+    pub(crate) fn is_elapsed(&self) -> bool {
         let state = self.state.load(SeqCst);
         is_elapsed(state)
     }
 
-    pub fn fire(&self, when: u64) {
+    pub(crate) fn fire(&self, when: u64) {
         let mut curr = self.state.load(SeqCst);
 
         loop {
@@ -249,7 +249,7 @@ impl Entry {
         self.waker.wake();
     }
 
-    pub fn error(&self) {
+    pub(crate) fn error(&self) {
         // Only transition to the error state if not currently elapsed
         let mut curr = self.state.load(SeqCst);
 
@@ -272,7 +272,7 @@ impl Entry {
         self.waker.wake();
     }
 
-    pub fn cancel(entry: &Arc<Entry>) {
+    pub(crate) fn cancel(entry: &Arc<Entry>) {
         let state = entry.state.fetch_or(ELAPSED, SeqCst);
 
         if is_elapsed(state) {
@@ -289,7 +289,7 @@ impl Entry {
         let _ = inner.queue(entry);
     }
 
-    pub fn poll_elapsed(&self, cx: &mut task::Context<'_>) -> Poll<Result<(), Error>> {
+    pub(crate) fn poll_elapsed(&self, cx: &mut task::Context<'_>) -> Poll<Result<(), Error>> {
         let mut curr = self.state.load(SeqCst);
 
         if is_elapsed(curr) {
@@ -316,7 +316,7 @@ impl Entry {
     }
 
     /// Only called by `Registration`
-    pub fn reset(entry: &mut Arc<Entry>) {
+    pub(crate) fn reset(entry: &mut Arc<Entry>) {
         if !entry.is_registered() {
             return;
         }
diff --git a/tokio-timer/src/timer/now.rs b/tokio-timer/src/timer/now.rs
index 53754427e..8e412b5eb 100644
--- a/tokio-timer/src/timer/now.rs
+++ b/tokio-timer/src/timer/now.rs
@@ -7,4 +7,5 @@ pub trait Now {
     fn now(&mut self) -> Instant;
 }
 
+#[allow(unreachable_pub)] // https://github.com/rust-lang/rust/issues/57411
 pub use crate::clock::Clock as SystemNow;
diff --git a/tokio-timer/src/timer/registration.rs b/tokio-timer/src/timer/registration.rs
index 5e379d235..9d7949a38 100644
--- a/tokio-timer/src/timer/registration.rs
+++ b/tokio-timer/src/timer/registration.rs
@@ -14,7 +14,7 @@ pub(crate) struct Registration {
 }
 
 impl Registration {
-    pub fn new(deadline: Instant, duration: Duration) -> Registration {
+    pub(crate) fn new(deadline: Instant, duration: Duration) -> Registration {
         fn is_send<T: Send + Sync>() {}
         is_send::<Registration>();
 
@@ -23,21 +23,21 @@ impl Registration {
         }
     }
 
-    pub fn deadline(&self) -> Instant {
+    pub(crate) fn deadline(&self) -> Instant {
         self.entry.time_ref().deadline
     }
 
-    pub fn register(&mut self) {
+    pub(crate) fn register(&mut self) {
         if !self.entry.is_registered() {
             Entry::register(&mut self.entry)
         }
     }
 
-    pub fn register_with(&mut self, handle: HandlePriv) {
+    pub(crate) fn register_with(&mut self, handle: HandlePriv) {
         Entry::register_with(&mut self.entry, handle)
     }
 
-    pub fn reset(&mut self, deadline: Instant) {
+    pub(crate) fn reset(&mut self, deadline: Instant) {
         unsafe {
             self.entry.time_mut().deadline = deadline;
         }
@@ -46,7 +46,7 @@ impl Registration {
 
     // Used by `Timeout<Stream>`
     #[cfg(feature = "async-traits")]
-    pub fn reset_timeout(&mut self) {
+    pub(crate) fn reset_timeout(&mut self) {
         let deadline = crate::clock::now() + self.entry.time_ref().duration;
         unsafe {
             self.entry.time_mut().deadline = deadline;
@@ -54,11 +54,11 @@ impl Registration {
         Entry::reset(&mut self.entry);
     }
 
-    pub fn is_elapsed(&self) -> bool {
+    pub(crate) fn is_elapsed(&self) -> bool {
         self.entry.is_elapsed()
     }
 
-    pub fn poll_elapsed(&self, cx: &mut task::Context<'_>) -> Poll<Result<(), Error>> {
+    pub(crate) fn poll_elapsed(&self, cx: &mut task::Context<'_>) -> Poll<Result<(), Error>> {
         self.entry.poll_elapsed(cx)
     }
 }
diff --git a/tokio-timer/src/wheel/level.rs b/tokio-timer/src/wheel/level.rs
index 868e6a796..d403e2327 100644
--- a/tokio-timer/src/wheel/level.rs
+++ b/tokio-timer/src/wheel/level.rs
@@ -22,13 +22,13 @@ pub(crate) struct Level<T> {
 #[derive(Debug)]
 pub(crate) struct Expiration {
     /// The level containing the slot.
-    pub level: usize,
+    pub(crate) level: usize,
 
     /// The slot index.
-    pub slot: usize,
+    pub(crate) slot: usize,
 
     /// The instant at which the slot needs to be processed.
-    pub deadline: u64,
+    pub(crate) deadline: u64,
 }
 
 /// Level multiplier.
@@ -37,7 +37,7 @@ pub(crate) struct Expiration {
 const LEVEL_MULT: usize = 64;
 
 impl<T: Stack> Level<T> {
-    pub fn new(level: usize) -> Level<T> {
+    pub(crate) fn new(level: usize) -> Level<T> {
         // Rust's derived implementations for arrays require that the value
         // contained by the array be `Copy`. So, here we have to manually
         // initialize every single slot.
@@ -123,7 +123,7 @@ impl<T: Stack> Level<T> {
 
     /// Finds the slot that needs to be processed next and returns the slot and
     /// `Instant` at which this slot must be processed.
-    pub fn next_expiration(&self, now: u64) -> Option<Expiration> {
+    pub(crate) fn next_expiration(&self, now: u64) -> Option<Expiration> {
         // Use the `occupied` bit field to get the index of the next slot that
         // needs to be processed.
         let slot = match self.next_occupied_slot(now) {
@@ -172,14 +172,14 @@ impl<T: Stack> Level<T> {
         Some(slot)
     }
 
-    pub fn add_entry(&mut self, when: u64, item: T::Owned, store: &mut T::Store) {
+    pub(crate) fn add_entry(&mut self, when: u64, item: T::Owned, store: &mut T::Store) {
         let slot = slot_for(when, self.level);
 
         self.slot[slot].push(item, store);
         self.occupied |= occupied_bit(slot);
     }
 
-    pub fn remove_entry(&mut self, when: u64, item: &T::Borrowed, store: &mut T::Store) {
+    pub(crate) fn remove_entry(&mut self, when: u64, item: &T::Borrowed, store: &mut T::Store) {
         let slot = slot_for(when, self.level);
 
         self.slot[slot].remove(item, store);
@@ -193,7 +193,7 @@ impl<T: Stack> Level<T> {
         }
     }
 
-    pub fn pop_entry_slot(&mut self, slot: usize, store: &mut T::Store) -> Option<T::Owned> {
+    pub(crate) fn pop_entry_slot(&mut self, slot: usize, store: &mut T::Store) -> Option<T::Owned> {
         let ret = self.slot[slot].pop(store);
 
         if ret.is_some() && self.slot[slot].is_empty() {
diff --git a/tokio-timer/src/wheel/mod.rs b/tokio-timer/src/wheel/mod.rs
index 81f92cd88..3a9a51e13 100644
--- a/tokio-timer/src/wheel/mod.rs
+++ b/tokio-timer/src/wheel/mod.rs
@@ -63,7 +63,7 @@ where
     T: Stack,
 {
     /// Create a new timing wheel
-    pub fn new() -> Wheel<T> {
+    pub(crate) fn new() -> Wheel<T> {
         let levels = (0..NUM_LEVELS).map(Level::new).collect();
 
         Wheel { elapsed: 0, levels }
@@ -71,7 +71,7 @@ where
 
     /// Return the number of milliseconds that have elapsed since the timing
     /// wheel's creation.
-    pub fn elapsed(&self) -> u64 {
+    pub(crate) fn elapsed(&self) -> u64 {
         self.elapsed
     }
 
@@ -96,7 +96,7 @@ where
     /// immediately.
     ///
     /// `Err(Invalid)` indicates an invalid `when` argument as been supplied.
-    pub fn insert(
+    pub(crate) fn insert(
         &mut self,
         when: u64,
         item: T::Owned,
@@ -124,7 +124,7 @@ where
     }
 
     /// Remove `item` from thee timing wheel.
-    pub fn remove(&mut self, item: &T::Borrowed, store: &mut T::Store) {
+    pub(crate) fn remove(&mut self, item: &T::Borrowed, store: &mut T::Store) {
         let when = T::when(item, store);
         let level = self.level_for(when);
 
@@ -132,11 +132,11 @@ where
     }
 
     /// Instant at which to poll
-    pub fn poll_at(&self) -> Option<u64> {
+    pub(crate) fn poll_at(&self) -> Option<u64> {
         self.next_expiration().map(|expiration| expiration.deadline)
     }
 
-    pub fn poll(&mut self, poll: &mut Poll, store: &mut T::Store) -> Option<T::Owned> {
+    pub(crate) fn poll(&mut self, poll: &mut Poll, store: &mut T::Store) -> Option<T::Owned> {
         loop {
             if poll.expiration.is_none() {
                 poll.expiration = self.next_expiration().and_then(|expiration| {
@@ -194,7 +194,7 @@ where
         None
     }
 
-    pub fn poll_expiration(
+    pub(crate) fn poll_expiration(
         &mut self,
         expiration: &Expiration,
         store: &mut T::Store,
@@ -249,7 +249,7 @@ fn level_for(elapsed: u64, when: u64) -> usize {
 }
 
 impl Poll {
-    pub fn new(now: u64) -> Poll {
+    pub(crate) fn new(now: u64) -> Poll {
         Poll {
             now,
             expiration: None,
diff --git a/tokio-tls/src/lib.rs b/tokio-tls/src/lib.rs
index 3d8900ce7..06b997ab7 100644
--- a/tokio-tls/src/lib.rs
+++ b/tokio-tls/src/lib.rs
@@ -1,5 +1,10 @@
 #![doc(html_root_url = "https://docs.rs/tokio-tls/0.3.0-alpha.1")]
-#![warn(rust_2018_idioms)]
+#![warn(
+    missing_debug_implementations,
+    missing_docs,
+    rust_2018_idioms,
+    unreachable_pub
+)]
 #![doc(test(no_crate_inject, attr(deny(rust_2018_idioms))))]
 #![feature(async_await)]
 
@@ -21,6 +26,7 @@
 //! `native-tls` crate.
 
 use native_tls::{Error, HandshakeError, MidHandshakeTlsStream};
+use std::fmt;
 use std::future::Future;
 use std::io::{self, Read, Write};
 use std::marker::Unpin;
@@ -270,6 +276,12 @@ impl TlsConnector {
     }
 }
 
+impl fmt::Debug for TlsConnector {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("TlsConnector").finish()
+    }
+}
+
 impl From<native_tls::TlsConnector> for TlsConnector {
     fn from(inner: native_tls::TlsConnector) -> TlsConnector {
         TlsConnector(inner)
@@ -295,6 +307,12 @@ impl TlsAcceptor {
     }
 }
 
+impl fmt::Debug for TlsAcceptor {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("TlsAcceptor").finish()
+    }
+}
+
 impl From<native_tls::TlsAcceptor> for TlsAcceptor {
     fn from(inner: native_tls::TlsAcceptor) -> TlsAcceptor {
         TlsAcceptor(inner)
diff --git a/tokio-udp/src/lib.rs b/tokio-udp/src/lib.rs
index b25fc71b0..aa200bfb8 100644
--- a/tokio-udp/src/lib.rs
+++ b/tokio-udp/src/lib.rs
@@ -1,5 +1,10 @@
 #![doc(html_root_url = "https://docs.rs/tokio-tcp/0.2.0-alpha.1")]
-#![warn(missing_docs, missing_debug_implementations, rust_2018_idioms)]
+#![warn(
+    missing_debug_implementations,
+    missing_docs,
+    rust_2018_idioms,
+    unreachable_pub
+)]
 #![doc(test(no_crate_inject, attr(deny(rust_2018_idioms))))]
 #![feature(async_await)]
 
diff --git a/tokio-uds/src/lib.rs b/tokio-uds/src/lib.rs
index a2824241a..e531e3b45 100644
--- a/tokio-uds/src/lib.rs
+++ b/tokio-uds/src/lib.rs
@@ -1,6 +1,11 @@
 #![cfg(unix)]
 #![doc(html_root_url = "https://docs.rs/tokio-uds/0.3.0-alpha.1")]
-#![warn(missing_docs, missing_debug_implementations, rust_2018_idioms)]
+#![warn(
+    missing_debug_implementations,
+    missing_docs,
+    rust_2018_idioms,
+    unreachable_pub
+)]
 #![doc(test(no_crate_inject, attr(deny(rust_2018_idioms))))]
 #![feature(async_await)]
 
diff --git a/tokio-uds/src/ucred.rs b/tokio-uds/src/ucred.rs
index 10c2fc4c8..ed607cfb5 100644
--- a/tokio-uds/src/ucred.rs
+++ b/tokio-uds/src/ucred.rs
@@ -10,7 +10,7 @@ pub struct UCred {
 }
 
 #[cfg(any(target_os = "linux", target_os = "android"))]
-pub use self::impl_linux::get_peer_cred;
+pub(crate) use self::impl_linux::get_peer_cred;
 
 #[cfg(any(
     target_os = "dragonfly",
@@ -20,20 +20,20 @@ pub use self::impl_linux::get_peer_cred;
     target_os = "netbsd",
     target_os = "openbsd"
 ))]
-pub use self::impl_macos::get_peer_cred;
+pub(crate) use self::impl_macos::get_peer_cred;
 
 #[cfg(any(target_os = "solaris"))]
-pub use self::impl_solaris::get_peer_cred;
+pub(crate) use self::impl_solaris::get_peer_cred;
 
 #[cfg(any(target_os = "linux", target_os = "android"))]
-pub mod impl_linux {
+pub(crate) mod impl_linux {
     use crate::UnixStream;
     use libc::{c_void, getsockopt, socklen_t, SOL_SOCKET, SO_PEERCRED};
     use std::{io, mem};
 
     use libc::ucred;
 
-    pub fn get_peer_cred(sock: &UnixStream) -> io::Result<super::UCred> {
+    pub(crate) fn get_peer_cred(sock: &UnixStream) -> io::Result<super::UCred> {
         use std::os::unix::io::AsRawFd;
 
         unsafe {
@@ -80,14 +80,14 @@ pub mod impl_linux {
     target_os = "netbsd",
     target_os = "openbsd"
 ))]
-pub mod impl_macos {
+pub(crate) mod impl_macos {
     use crate::UnixStream;
     use libc::getpeereid;
     use std::io;
     use std::mem::MaybeUninit;
     use std::os::unix::io::AsRawFd;
 
-    pub fn get_peer_cred(sock: &UnixStream) -> io::Result<super::UCred> {
+    pub(crate) fn get_peer_cred(sock: &UnixStream) -> io::Result<super::UCred> {
         unsafe {
             let raw_fd = sock.as_raw_fd();
 
@@ -109,7 +109,7 @@ pub mod impl_macos {
 }
 
 #[cfg(any(target_os = "solaris"))]
-pub mod impl_solaris {
+pub(crate) mod impl_solaris {
     use std::io;
     use std::os::unix::io::AsRawFd;
     use std::ptr;
@@ -129,7 +129,7 @@ pub mod impl_solaris {
         ) -> ::std::os::raw::c_int;
     }
 
-    pub fn get_peer_cred(sock: &UnixStream) -> io::Result<super::UCred> {
+    pub(crate) fn get_peer_cred(sock: &UnixStream) -> io::Result<super::UCred> {
         unsafe {
             let raw_fd = sock.as_raw_fd();
 
diff --git a/tokio/src/lib.rs b/tokio/src/lib.rs
index 75d52073f..a20a417c7 100644
--- a/tokio/src/lib.rs
+++ b/tokio/src/lib.rs
@@ -1,5 +1,10 @@
 #![doc(html_root_url = "https://docs.rs/tokio/0.2.0-alpha.1")]
-#![warn(missing_docs, missing_debug_implementations, rust_2018_idioms)]
+#![warn(
+    missing_debug_implementations,
+    missing_docs,
+    rust_2018_idioms,
+    unreachable_pub
+)]
 #![doc(test(no_crate_inject, attr(deny(rust_2018_idioms))))]
 #![feature(async_await)]
 
diff --git a/tokio/src/runtime/threadpool/background.rs b/tokio/src/runtime/threadpool/background.rs
index 64ab54415..8e44bba9b 100644
--- a/tokio/src/runtime/threadpool/background.rs
+++ b/tokio/src/runtime/threadpool/background.rs
@@ -10,14 +10,14 @@ use tokio_timer::timer::{self, Timer};
 use std::{io, thread};
 
 #[derive(Debug)]
-pub struct Background {
+pub(crate) struct Background {
     reactor_handle: tokio_reactor::Handle,
     timer_handle: timer::Handle,
     shutdown_tx: Option<oneshot::Sender<()>>,
     thread: Option<thread::JoinHandle<()>>,
 }
 
-pub fn spawn(clock: &Clock) -> io::Result<Background> {
+pub(crate) fn spawn(clock: &Clock) -> io::Result<Background> {
     let clock = clock.clone();
 
     let reactor = Reactor::new()?;
diff --git a/tokio/src/runtime/threadpool/mod.rs b/tokio/src/runtime/threadpool/mod.rs
index b699bbf48..f9341f097 100644
--- a/tokio/src/runtime/threadpool/mod.rs
+++ b/tokio/src/runtime/threadpool/mod.rs
@@ -2,7 +2,9 @@ mod background;
 mod builder;
 mod task_executor;
 
+#[allow(unreachable_pub)] // https://github.com/rust-lang/rust/issues/57411
 pub use self::builder::Builder;
+#[allow(unreachable_pub)] // https://github.com/rust-lang/rust/issues/57411
 pub use self::task_executor::TaskExecutor;
 use background::Background;