diff --git a/Cargo.toml b/Cargo.toml
index 2d42213..47a9ddd 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,8 +22,15 @@ webpki = "0.18.0-alpha"
 
 [dev-dependencies]
 tokio = "0.1"
+tokio-io = "0.1"
+# tokio-core = "0.1"
+# tokio-file-unix = "0.4"
 clap = "2.26"
 webpki-roots = "0.14"
 
 [features]
-default = [ "futures", "tokio" ]
+unstable-futures = [ "futures", "tokio/unstable-futures" ]
+default = [ "unstable-futures", "tokio" ]
+
+[patch.crates-io]
+tokio = { path = "../ref/tokio" }
diff --git a/examples/client.rs b/examples/client.rs
index 418a6a4..d454b01 100644
--- a/examples/client.rs
+++ b/examples/client.rs
@@ -1,7 +1,6 @@
 extern crate clap;
 extern crate rustls;
-extern crate futures;
-extern crate tokio_io;
+extern crate tokio;
 extern crate tokio_core;
 extern crate webpki;
 extern crate webpki_roots;
@@ -14,16 +13,16 @@ use std::sync::Arc;
 use std::net::ToSocketAddrs;
 use std::io::{ BufReader, stdout, stdin };
 use std::fs;
-use futures::Future;
+use tokio::io;
+use tokio::prelude::*;
 use tokio_core::net::TcpStream;
 use tokio_core::reactor::Core;
-use tokio_io::io;
 use clap::{ App, Arg };
 use rustls::ClientConfig;
 use tokio_rustls::ClientConfigExt;
 
 #[cfg(unix)]
-use tokio_io::AsyncRead;
+use tokio::io::AsyncRead;
 
 #[cfg(unix)]
 use tokio_file_unix::{ StdFile, File };
diff --git a/src/futures_impl.rs b/src/futures_impl.rs
index e8c1f79..0f5cc80 100644
--- a/src/futures_impl.rs
+++ b/src/futures_impl.rs
@@ -6,7 +6,7 @@ use self::futures::io::{ Error, AsyncRead, AsyncWrite };
 use self::futures::task::Context;
 
 
-impl<S: io::Read + io::Write> Future for ConnectAsync<S> {
+impl<S: AsyncRead + AsyncWrite> Future for ConnectAsync<S> {
     type Item = TlsStream<S, ClientSession>;
     type Error = io::Error;
 
@@ -15,7 +15,7 @@ impl<S: io::Read + io::Write> Future for ConnectAsync<S> {
     }
 }
 
-impl<S: io::Read + io::Write> Future for AcceptAsync<S> {
+impl<S: AsyncRead + AsyncWrite> Future for AcceptAsync<S> {
     type Item = TlsStream<S, ServerSession>;
     type Error = io::Error;
 
@@ -24,20 +24,67 @@ impl<S: io::Read + io::Write> Future for AcceptAsync<S> {
     }
 }
 
+macro_rules! async {
+    ( to $r:expr ) => {
+        match $r {
+            Ok(Async::Ready(n)) => Ok(n),
+            Ok(Async::Pending) => Err(io::ErrorKind::WouldBlock.into()),
+            Err(e) => Err(e)
+        }
+    };
+    ( from $r:expr ) => {
+        match $r {
+            Ok(n) => Ok(Async::Ready(n)),
+            Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => Ok(Async::Pending),
+            Err(e) => Err(e)
+        }
+    };
+}
+
+struct TaskStream<'a, 'b: 'a, S: 'a> {
+    io: &'a mut S,
+    task: &'a mut Context<'b>
+}
+
+impl<'a, 'b, S> io::Read for TaskStream<'a, 'b, S>
+    where S: AsyncRead + AsyncWrite
+{
+    #[inline]
+    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+        async!(to self.io.poll_read(self.task, buf))
+    }
+}
+
+impl<'a, 'b, S> io::Write for TaskStream<'a, 'b, S>
+    where S: AsyncRead + AsyncWrite
+{
+    #[inline]
+    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+        async!(to self.io.poll_write(self.task, buf))
+    }
+
+    #[inline]
+    fn flush(&mut self) -> io::Result<()> {
+        async!(to self.io.poll_flush(self.task))
+    }
+}
+
 impl<S, C> Future for MidHandshake<S, C>
-    where S: io::Read + io::Write, C: Session
+    where S: AsyncRead + AsyncWrite, C: Session
 {
     type Item = TlsStream<S, C>;
     type Error = io::Error;
 
-    fn poll(&mut self, _: &mut Context) -> Poll<Self::Item, Self::Error> {
+    fn poll(&mut self, ctx: &mut Context) -> Poll<Self::Item, Self::Error> {
         loop {
             let stream = self.inner.as_mut().unwrap();
             if !stream.session.is_handshaking() { break };
 
-            match stream.do_io() {
+            let mut taskio = TaskStream { io: &mut stream.io, task: ctx };
+
+            match TlsStream::do_io(&mut stream.session, &mut taskio, &mut stream.eof) {
                 Ok(()) => match (stream.eof, stream.session.is_handshaking()) {
-                    (true, true) => return Err(io::Error::from(io::ErrorKind::UnexpectedEof)),
+                    (true, true) => return Err(io::ErrorKind::UnexpectedEof.into()),
                     (false, true) => continue,
                     (..) => break
                 },
@@ -58,8 +105,10 @@ impl<S, C> AsyncRead for TlsStream<S, C>
         S: AsyncRead + AsyncWrite,
         C: Session
 {
-    fn poll_read(&mut self, _: &mut Context, buf: &mut [u8]) -> Poll<usize, Error> {
-        unimplemented!()
+    fn poll_read(&mut self, ctx: &mut Context, buf: &mut [u8]) -> Poll<usize, Error> {
+        let mut taskio = TaskStream { io: &mut self.io, task: ctx };
+        // FIXME TlsStream + TaskStream
+        async!(from io::Read::read(&mut taskio, buf))
     }
 }
 
@@ -68,15 +117,29 @@ impl<S, C> AsyncWrite for TlsStream<S, C>
         S: AsyncRead + AsyncWrite,
         C: Session
 {
-    fn poll_write(&mut self, _: &mut Context, buf: &[u8]) -> Poll<usize, Error> {
-        unimplemented!()
+    fn poll_write(&mut self, ctx: &mut Context, buf: &[u8]) -> Poll<usize, Error> {
+        let mut taskio = TaskStream { io: &mut self.io, task: ctx };
+        // FIXME TlsStream + TaskStream
+        async!(from io::Write::write(&mut taskio, buf))
     }
 
-    fn poll_flush(&mut self, _: &mut Context) -> Poll<(), Error> {
-        unimplemented!()
+    fn poll_flush(&mut self, ctx: &mut Context) -> Poll<(), Error> {
+        let mut taskio = TaskStream { io: &mut self.io, task: ctx };
+        // FIXME TlsStream + TaskStream
+        async!(from io::Write::flush(&mut taskio))
     }
 
-    fn poll_close(&mut self, _: &mut Context) -> Poll<(), Error> {
-        unimplemented!()
+    fn poll_close(&mut self, ctx: &mut Context) -> Poll<(), Error> {
+        if !self.is_shutdown {
+            self.session.send_close_notify();
+            self.is_shutdown = true;
+        }
+
+        {
+            let mut taskio = TaskStream { io: &mut self.io, task: ctx };
+            while TlsStream::do_write(&mut self.session, &mut taskio)? {};
+        }
+
+        self.io.poll_close(ctx)
     }
 }
diff --git a/src/lib.rs b/src/lib.rs
index b7cd5b0..8167a5c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -4,7 +4,7 @@ extern crate rustls;
 extern crate webpki;
 
 #[cfg(feature = "tokio")] mod tokio_impl;
-#[cfg(feature = "futures")] mod futures_impl;
+#[cfg(feature = "unstable-futures")] mod futures_impl;
 
 use std::io;
 use std::sync::Arc;
@@ -101,25 +101,6 @@ impl<S, C> TlsStream<S, C> {
     }
 }
 
-
-macro_rules! try_wouldblock {
-    ( continue $r:expr ) => {
-        match $r {
-            Ok(true) => continue,
-            Ok(false) => false,
-            Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => true,
-            Err(e) => return Err(e)
-        }
-    };
-    ( ignore $r:expr ) => {
-        match $r {
-            Ok(_) => (),
-            Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => (),
-            Err(e) => return Err(e)
-        }
-    };
-}
-
 impl<S, C> TlsStream<S, C>
     where S: io::Read + io::Write, C: Session
 {
@@ -133,19 +114,19 @@ impl<S, C> TlsStream<S, C>
         }
     }
 
-    fn do_read(&mut self) -> io::Result<bool> {
-        if !self.eof && self.session.wants_read() {
-            if self.session.read_tls(&mut self.io)? == 0 {
-                self.eof = true;
+    fn do_read(session: &mut C, io: &mut S, eof: &mut bool) -> io::Result<bool> {
+        if !*eof && session.wants_read() {
+            if session.read_tls(io)? == 0 {
+                *eof = true;
             }
 
-            if let Err(err) = self.session.process_new_packets() {
+            if let Err(err) = session.process_new_packets() {
                 // flush queued messages before returning an Err in
                 // order to send alerts instead of abruptly closing
                 // the socket
-                if self.session.wants_write() {
+                if session.wants_write() {
                     // ignore result to avoid masking original error
-                    let _ = self.session.write_tls(&mut self.io);
+                    let _ = session.write_tls(io);
                 }
                 return Err(io::Error::new(io::ErrorKind::InvalidData, err));
             }
@@ -156,9 +137,9 @@ impl<S, C> TlsStream<S, C>
         }
     }
 
-    fn do_write(&mut self) -> io::Result<bool> {
-        if self.session.wants_write() {
-            self.session.write_tls(&mut self.io)?;
+    fn do_write(session: &mut C, io: &mut S) -> io::Result<bool> {
+        if session.wants_write() {
+            session.write_tls(io)?;
 
             Ok(true)
         } else {
@@ -167,10 +148,21 @@ impl<S, C> TlsStream<S, C>
     }
 
     #[inline]
-    pub fn do_io(&mut self) -> io::Result<()> {
+    pub fn do_io(session: &mut C, io: &mut S, eof: &mut bool) -> io::Result<()> {
+        macro_rules! try_wouldblock {
+            ( $r:expr ) => {
+                match $r {
+                    Ok(true) => continue,
+                    Ok(false) => false,
+                    Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => true,
+                    Err(e) => return Err(e)
+                }
+            };
+        }
+
         loop {
-            let write_would_block = try_wouldblock!(continue self.do_write());
-            let read_would_block = try_wouldblock!(continue self.do_read());
+            let write_would_block = try_wouldblock!(Self::do_write(session, io));
+            let read_would_block = try_wouldblock!(Self::do_read(session, io, eof));
 
             if write_would_block || read_would_block {
                 return Err(io::Error::from(io::ErrorKind::WouldBlock));
@@ -181,18 +173,28 @@ impl<S, C> TlsStream<S, C>
     }
 }
 
+macro_rules! try_ignore {
+    ( $r:expr ) => {
+        match $r {
+            Ok(_) => (),
+            Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => (),
+            Err(e) => return Err(e)
+        }
+    }
+}
+
 impl<S, C> io::Read for TlsStream<S, C>
     where S: io::Read + io::Write, C: Session
 {
     fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
-        try_wouldblock!(ignore self.do_io());
+        try_ignore!(Self::do_io(&mut self.session, &mut self.io, &mut self.eof));
 
         loop {
             match self.session.read(buf) {
-                Ok(0) if !self.eof => while self.do_read()? {},
+                Ok(0) if !self.eof => while Self::do_read(&mut self.session, &mut self.io, &mut self.eof)? {},
                 Ok(n) => return Ok(n),
                 Err(e) => if e.kind() == io::ErrorKind::ConnectionAborted {
-                    try_wouldblock!(ignore self.do_read());
+                    try_ignore!(Self::do_read(&mut self.session, &mut self.io, &mut self.eof));
                     return if self.eof { Ok(0) } else { Err(e) }
                 } else {
                     return Err(e)
@@ -206,12 +208,12 @@ impl<S, C> io::Write for TlsStream<S, C>
     where S: io::Read + io::Write, C: Session
 {
     fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
-        try_wouldblock!(ignore self.do_io());
+        try_ignore!(Self::do_io(&mut self.session, &mut self.io, &mut self.eof));
 
         let mut wlen = self.session.write(buf)?;
 
         loop {
-            match self.do_write() {
+            match Self::do_write(&mut self.session, &mut self.io) {
                 Ok(true) => continue,
                 Ok(false) if wlen == 0 => (),
                 Ok(false) => break,
@@ -234,7 +236,7 @@ impl<S, C> io::Write for TlsStream<S, C>
 
     fn flush(&mut self) -> io::Result<()> {
         self.session.flush()?;
-        while self.do_write()? {};
+        while Self::do_write(&mut self.session, &mut self.io)? {};
         self.io.flush()
     }
 }
diff --git a/src/tokio_impl.rs b/src/tokio_impl.rs
index edbda5b..294f915 100644
--- a/src/tokio_impl.rs
+++ b/src/tokio_impl.rs
@@ -35,7 +35,7 @@ impl<S, C> Future for MidHandshake<S, C>
             let stream = self.inner.as_mut().unwrap();
             if !stream.session.is_handshaking() { break };
 
-            match stream.do_io() {
+            match TlsStream::do_io(&mut stream.session, &mut stream.io, &mut stream.eof) {
                 Ok(()) => match (stream.eof, stream.session.is_handshaking()) {
                     (true, true) => return Err(io::Error::from(io::ErrorKind::UnexpectedEof)),
                     (false, true) => continue,
@@ -69,7 +69,7 @@ impl<S, C> AsyncWrite for TlsStream<S, C>
             self.session.send_close_notify();
             self.is_shutdown = true;
         }
-        while self.do_write()? {};
+        while TlsStream::do_write(&mut self.session, &mut self.io)? {};
         self.io.shutdown()
     }
 }
diff --git a/tests/test.rs b/tests/test.rs
index 5e37e73..c0e2c8f 100644
--- a/tests/test.rs
+++ b/tests/test.rs
@@ -1,18 +1,16 @@
 extern crate rustls;
-extern crate futures;
 extern crate tokio;
 extern crate tokio_rustls;
 extern crate webpki;
 
+#[cfg(feature = "unstable-futures")] extern crate futures;
+
 use std::{ io, thread };
 use std::io::{ BufReader, Cursor };
 use std::sync::Arc;
 use std::sync::mpsc::channel;
 use std::net::{ SocketAddr, IpAddr, Ipv4Addr };
-use tokio::prelude::*;
-// use futures::{ FutureExt, StreamExt };
 use tokio::net::{ TcpListener, TcpStream };
-use tokio::io as aio;
 use rustls::{ Certificate, PrivateKey, ServerConfig, ClientConfig };
 use rustls::internal::pemfile::{ certs, rsa_private_keys };
 use tokio_rustls::{ ClientConfigExt, ServerConfigExt };
@@ -24,6 +22,9 @@ const HELLO_WORLD: &[u8] = b"Hello world!";
 
 
 fn start_server(cert: Vec<Certificate>, rsa: PrivateKey) -> SocketAddr {
+    use tokio::prelude::*;
+    use tokio::io as aio;
+
     let mut config = ServerConfig::new(rustls::NoClientAuth::new());
     config.set_single_cert(cert, rsa);
     let config = Arc::new(config);
@@ -45,21 +46,62 @@ fn start_server(cert: Vec<Certificate>, rsa: PrivateKey) -> SocketAddr {
                         aio::write_all(stream, HELLO_WORLD)
                     })
                     .map(drop)
-                    .map_err(drop);
+                    .map_err(|err| panic!("{:?}", err));
 
                 tokio::spawn(done);
                 Ok(())
             })
-            .then(|_| Ok(()));
+            .map_err(|err| panic!("{:?}", err));
 
-        tokio::runtime::run(done);
+        tokio::run(done);
     });
 
     recv.recv().unwrap()
 }
 
-fn start_client(addr: &SocketAddr, domain: &str,
-                chain: Option<BufReader<Cursor<&str>>>) -> io::Result<()> {
+fn start_server2(cert: Vec<Certificate>, rsa: PrivateKey) -> SocketAddr {
+    use futures::{ FutureExt, StreamExt };
+    use futures::io::{ AsyncReadExt, AsyncWriteExt };
+
+    let mut config = ServerConfig::new(rustls::NoClientAuth::new());
+    config.set_single_cert(cert, rsa);
+    let config = Arc::new(config);
+
+    let (send, recv) = channel();
+
+    thread::spawn(move || {
+        let addr = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 0);
+        let listener = TcpListener::bind(&addr).unwrap();
+
+        send.send(listener.local_addr().unwrap()).unwrap();
+
+        let done = listener.incoming()
+            .for_each(move |stream| {
+                let done = config.accept_async(stream)
+                    .and_then(|stream| stream.read_exact(vec![0; HELLO_WORLD.len()]))
+                    .and_then(|(stream, buf)| {
+                        assert_eq!(buf, HELLO_WORLD);
+                        stream.write_all(HELLO_WORLD)
+                    })
+                    .map(drop)
+                    .map_err(|err| panic!("{:?}", err));
+
+                tokio::spawn2(done);
+                Ok(())
+            })
+            .map(drop)
+            .map_err(|err| panic!("{:?}", err));
+
+        tokio::runtime::run2(done);
+    });
+
+    recv.recv().unwrap()
+}
+
+fn start_client(addr: &SocketAddr, domain: &str, chain: Option<BufReader<Cursor<&str>>>) -> io::Result<()> {
+    use tokio::prelude::*;
+    use tokio::io as aio;
+
     let domain = webpki::DNSNameRef::try_from_ascii_str(domain).unwrap();
     let mut config = ClientConfig::new();
     if let Some(mut chain) = chain {
@@ -79,9 +121,41 @@ fn start_client(addr: &SocketAddr, domain: &str,
     done.wait()
 }
 
+#[cfg(feature = "unstable-futures")]
+fn start_client2(addr: &SocketAddr, domain: &str, chain: Option<BufReader<Cursor<&str>>>) -> io::Result<()> {
+    use futures::FutureExt;
+    use futures::io::{ AsyncReadExt, AsyncWriteExt };
+    use futures::executor::block_on;
+
+    let domain = webpki::DNSNameRef::try_from_ascii_str(domain).unwrap();
+    let mut config = ClientConfig::new();
+    if let Some(mut chain) = chain {
+        config.root_store.add_pem_file(&mut chain).unwrap();
+    }
+    let config = Arc::new(config);
+
+    let done = TcpStream::connect(addr)
+        .and_then(|stream| config.connect_async(domain, stream))
+        .and_then(|stream| {
+            eprintln!("WRITE: {:?}", stream);
+            stream.write_all(HELLO_WORLD)
+        })
+        .and_then(|(stream, _)| {
+            eprintln!("READ: {:?}", stream);
+            stream.read_exact(vec![0; HELLO_WORLD.len()])
+        })
+        .and_then(|(stream, buf)| {
+            eprintln!("OK: {:?}", stream);
+            assert_eq!(buf, HELLO_WORLD);
+            Ok(())
+        });
+
+    block_on(done)
+}
+
 
 #[test]
-fn main() {
+fn pass() {
     let cert = certs(&mut BufReader::new(Cursor::new(CERT))).unwrap();
     let mut keys = rsa_private_keys(&mut BufReader::new(Cursor::new(RSA))).unwrap();
     let chain = BufReader::new(Cursor::new(CHAIN));
@@ -90,6 +164,17 @@ fn main() {
     start_client(&addr, "localhost", Some(chain)).unwrap();
 }
 
+#[cfg(feature = "unstable-futures")]
+#[test]
+fn pass2() {
+    let cert = certs(&mut BufReader::new(Cursor::new(CERT))).unwrap();
+    let mut keys = rsa_private_keys(&mut BufReader::new(Cursor::new(RSA))).unwrap();
+    let chain = BufReader::new(Cursor::new(CHAIN));
+
+    let addr = start_server2(cert, keys.pop().unwrap());
+    start_client2(&addr, "localhost", Some(chain)).unwrap();
+}
+
 #[should_panic]
 #[test]
 fn fail() {