diff --git a/src/sys/unix/net.rs b/src/sys/unix/net.rs
index ed58adaad..5a473bd2d 100644
--- a/src/sys/unix/net.rs
+++ b/src/sys/unix/net.rs
@@ -25,6 +25,8 @@ pub(crate) fn new_socket(domain: libc::c_int, socket_type: libc::c_int) -> io::R
         target_os = "hermit",
     ))]
     let socket_type = socket_type | libc::SOCK_NONBLOCK | libc::SOCK_CLOEXEC;
+    #[cfg(target_os = "nto")]
+    let socket_type = socket_type | libc::SOCK_CLOEXEC;
 
     let socket = syscall!(socket(domain, socket_type, 0))?;
 
@@ -54,13 +56,14 @@ pub(crate) fn new_socket(domain: libc::c_int, socket_type: libc::c_int) -> io::R
         target_os = "watchos",
         target_os = "espidf",
         target_os = "vita",
+        target_os = "nto",
     ))]
     {
         if let Err(err) = syscall!(fcntl(socket, libc::F_SETFL, libc::O_NONBLOCK)) {
             let _ = syscall!(close(socket));
             return Err(err);
         }
-        #[cfg(not(any(target_os = "espidf", target_os = "vita")))]
+        #[cfg(not(any(target_os = "espidf", target_os = "vita", target_os = "nto")))]
         if let Err(err) = syscall!(fcntl(socket, libc::F_SETFD, libc::FD_CLOEXEC)) {
             let _ = syscall!(close(socket));
             return Err(err);
@@ -117,6 +120,7 @@ pub(crate) fn socket_addr(addr: &SocketAddr) -> (SocketAddrCRepr, libc::socklen_
                     target_os = "espidf",
                     target_os = "vita",
                     target_os = "hermit",
+                    target_os = "nto",
                 ))]
                 sin_len: 0,
                 #[cfg(target_os = "vita")]
@@ -148,6 +152,7 @@ pub(crate) fn socket_addr(addr: &SocketAddr) -> (SocketAddrCRepr, libc::socklen_
                     target_os = "watchos",
                     target_os = "espidf",
                     target_os = "vita",
+                    target_os = "nto",
                 ))]
                 sin6_len: 0,
                 #[cfg(target_os = "vita")]
diff --git a/src/sys/unix/pipe.rs b/src/sys/unix/pipe.rs
index 7f23787f7..c44106a29 100644
--- a/src/sys/unix/pipe.rs
+++ b/src/sys/unix/pipe.rs
@@ -33,6 +33,7 @@ pub(crate) fn new_raw() -> io::Result<[RawFd; 2]> {
         target_os = "tvos",
         target_os = "watchos",
         target_os = "espidf",
+        target_os = "nto",
     ))]
     unsafe {
         // For platforms that don't have `pipe2(2)` we need to manually set the
@@ -71,6 +72,7 @@ pub(crate) fn new_raw() -> io::Result<[RawFd; 2]> {
         target_os = "espidf",
         target_os = "solaris",
         target_os = "vita",
+        target_os = "nto",
     )))]
     compile_error!("unsupported target for `mio::unix::pipe`");
 
diff --git a/src/sys/unix/tcp.rs b/src/sys/unix/tcp.rs
index 0c379b5f8..a8d8d0b46 100644
--- a/src/sys/unix/tcp.rs
+++ b/src/sys/unix/tcp.rs
@@ -95,6 +95,7 @@ pub(crate) fn accept(listener: &net::TcpListener) -> io::Result<(net::TcpStream,
         target_os = "espidf",
         target_os = "vita",
         target_os = "hermit",
+        target_os = "nto",
         all(target_arch = "x86", target_os = "android"),
     ))]
     let stream = {
@@ -114,6 +115,7 @@ pub(crate) fn accept(listener: &net::TcpListener) -> io::Result<(net::TcpStream,
                 target_os = "espidf",
                 target_os = "vita",
                 target_os = "hermit",
+                target_os = "nto",
             ))]
             syscall!(fcntl(s.as_raw_fd(), libc::F_SETFL, libc::O_NONBLOCK))?;
 
diff --git a/src/sys/unix/uds/listener.rs b/src/sys/unix/uds/listener.rs
index 65d332c83..b94243720 100644
--- a/src/sys/unix/uds/listener.rs
+++ b/src/sys/unix/uds/listener.rs
@@ -53,6 +53,7 @@ pub(crate) fn accept(listener: &net::UnixListener) -> io::Result<(UnixStream, So
         target_os = "watchos",
         target_os = "espidf",
         target_os = "vita",
+        target_os = "nto",
         // Android x86's seccomp profile forbids calls to `accept4(2)`
         // See https://github.com/tokio-rs/mio/issues/1445 for details
         all(target_arch = "x86", target_os = "android"),
@@ -78,6 +79,7 @@ pub(crate) fn accept(listener: &net::UnixListener) -> io::Result<(UnixStream, So
         target_os = "watchos",
         target_os = "espidf",
         target_os = "vita",
+        target_os = "nto",
         all(target_arch = "x86", target_os = "android")
     ))]
     let socket = syscall!(accept(
@@ -97,6 +99,7 @@ pub(crate) fn accept(listener: &net::UnixListener) -> io::Result<(UnixStream, So
             all(target_arch = "x86", target_os = "android"),
             target_os = "espidf",
             target_os = "vita",
+            target_os = "nto",
         ))]
         syscall!(fcntl(socket, libc::F_SETFL, libc::O_NONBLOCK))?;
 
diff --git a/src/sys/unix/uds/mod.rs b/src/sys/unix/uds/mod.rs
index 376ee05ee..20367fd09 100644
--- a/src/sys/unix/uds/mod.rs
+++ b/src/sys/unix/uds/mod.rs
@@ -82,8 +82,11 @@ cfg_os_poll! {
             target_os = "watchos",
             target_os = "espidf",
             target_os = "vita",
+            target_os = "nto",
         )))]
         let flags = flags | libc::SOCK_NONBLOCK | libc::SOCK_CLOEXEC;
+        #[cfg(target_os = "nto")]
+        let flags = flags | libc::SOCK_CLOEXEC;
 
         let mut fds = [-1; 2];
         syscall!(socketpair(libc::AF_UNIX, flags, 0, fds.as_mut_ptr()))?;
@@ -103,13 +106,14 @@ cfg_os_poll! {
             target_os = "watchos",
             target_os = "espidf",
             target_os = "vita",
+            target_os = "nto",
         ))]
         {
             syscall!(fcntl(fds[0], libc::F_SETFL, libc::O_NONBLOCK))?;
-            #[cfg(not(any(target_os = "espidf", target_os = "vita")))]
+            #[cfg(not(any(target_os = "espidf", target_os = "vita", target_os = "nto")))]
             syscall!(fcntl(fds[0], libc::F_SETFD, libc::FD_CLOEXEC))?;
             syscall!(fcntl(fds[1], libc::F_SETFL, libc::O_NONBLOCK))?;
-            #[cfg(not(any(target_os = "espidf", target_os = "vita")))]
+            #[cfg(not(any(target_os = "espidf", target_os = "vita", target_os = "nto")))]
             syscall!(fcntl(fds[1], libc::F_SETFD, libc::FD_CLOEXEC))?;
         }
 
diff --git a/tests/tcp.rs b/tests/tcp.rs
index 4eb42e178..49e731936 100644
--- a/tests/tcp.rs
+++ b/tests/tcp.rs
@@ -701,8 +701,8 @@ fn write_shutdown() {
     // Now, shutdown the write half of the socket.
     socket.shutdown(Shutdown::Write).unwrap();
 
-    // POLLRDHUP isn't supported on Solaris
-    if cfg!(target_os = "solaris") {
+    // POLLRDHUP isn't supported on Solaris,
+    if cfg!(any(target_os = "solaris", target_os = "nto")) {
         wait!(poll, is_readable, false);
     } else {
         wait!(poll, is_readable, true);
diff --git a/tests/tcp_stream.rs b/tests/tcp_stream.rs
index ad2224c24..b307a2ad6 100644
--- a/tests/tcp_stream.rs
+++ b/tests/tcp_stream.rs
@@ -515,6 +515,7 @@ fn no_events_after_deregister() {
     ignore = "fails on Windows; client read closed events are not triggered"
 )]
 #[cfg_attr(target_os = "solaris", ignore = "POLLRDHUP isn't supported on Solaris")]
+#[cfg_attr(target_os = "nto", ignore = "POLLRDHUP isn't supported on NTO")]
 fn tcp_shutdown_client_read_close_event() {
     let (mut poll, mut events) = init_with_poll();
     let barrier = Arc::new(Barrier::new(2));
@@ -552,7 +553,8 @@ fn tcp_shutdown_client_read_close_event() {
         target_os = "android",
         target_os = "illumos",
         target_os = "solaris",
-        target_os = "linux"
+        target_os = "linux",
+        target_os = "nto"
     ),
     ignore = "fails; client write_closed events are not found"
 )]
@@ -588,6 +590,7 @@ fn tcp_shutdown_client_write_close_event() {
 
 #[test]
 #[cfg_attr(target_os = "solaris", ignore = "POLLRDHUP isn't supported on Solaris")]
+#[cfg_attr(target_os = "nto", ignore = "POLLRDHUP isn't supported on NTO")]
 fn tcp_shutdown_server_write_close_event() {
     let (mut poll, mut events) = init_with_poll();
     let barrier = Arc::new(Barrier::new(2));
@@ -619,6 +622,7 @@ fn tcp_shutdown_server_write_close_event() {
 
 #[test]
 #[cfg_attr(target_os = "solaris", ignore = "POLLRDHUP isn't supported on Solaris")]
+#[cfg_attr(target_os = "nto", ignore = "POLLRDHUP isn't supported on NTO")]
 fn tcp_reset_close_event() {
     let (mut poll, mut events) = init_with_poll();
 
diff --git a/tests/unix_datagram.rs b/tests/unix_datagram.rs
index 31784051c..2345989b7 100644
--- a/tests/unix_datagram.rs
+++ b/tests/unix_datagram.rs
@@ -167,6 +167,7 @@ fn unix_datagram_pair() {
 
 #[test]
 #[cfg_attr(target_os = "solaris", ignore = "POLLRDHUP isn't supported on Solaris")]
+#[cfg_attr(target_os = "nto", ignore = "POLLRDHUP isn't supported on NTO")]
 fn unix_datagram_shutdown() {
     let (mut poll, mut events) = init_with_poll();
     let path1 = temp_file("unix_datagram_shutdown1");
diff --git a/tests/unix_pipe.rs b/tests/unix_pipe.rs
index f8e6464c9..dc79026c4 100644
--- a/tests/unix_pipe.rs
+++ b/tests/unix_pipe.rs
@@ -53,6 +53,10 @@ fn smoke() {
 }
 
 #[test]
+#[cfg_attr(
+    target_os = "nto",
+    ignore = "Writer fd close events do not trigger POLLHUP on nto target"
+)]
 fn event_when_sender_is_dropped() {
     let mut poll = Poll::new().unwrap();
     let mut events = Events::with_capacity(8);
@@ -91,6 +95,10 @@ fn event_when_sender_is_dropped() {
 }
 
 #[test]
+#[cfg_attr(
+    target_os = "nto",
+    ignore = "Read fd close events do not trigger POLLHUP on nto target"
+)]
 fn event_when_receiver_is_dropped() {
     let mut poll = Poll::new().unwrap();
     let mut events = Events::with_capacity(8);
@@ -124,10 +132,13 @@ fn event_when_receiver_is_dropped() {
 }
 
 #[test]
+#[cfg_attr(
+    target_os = "nto",
+    ignore = "Read/Write close eventsdo not trigger POLLHUP on nto target"
+)]
 fn from_child_process_io() {
     // `cat` simply echo everything that we write via standard in.
     let mut child = Command::new("cat")
-        .env_clear()
         .stdin(Stdio::piped())
         .stdout(Stdio::piped())
         .spawn()
@@ -175,7 +186,6 @@ fn from_child_process_io() {
 fn nonblocking_child_process_io() {
     // `cat` simply echo everything that we write via standard in.
     let mut child = Command::new("cat")
-        .env_clear()
         .stdin(Stdio::piped())
         .stdout(Stdio::piped())
         .spawn()
diff --git a/tests/unix_stream.rs b/tests/unix_stream.rs
index ecafa5440..9098b7d17 100644
--- a/tests/unix_stream.rs
+++ b/tests/unix_stream.rs
@@ -187,6 +187,7 @@ fn unix_stream_peer_addr() {
 
 #[test]
 #[cfg_attr(target_os = "solaris", ignore = "POLLRDHUP isn't supported on Solaris")]
+#[cfg_attr(target_os = "nto", ignore = "POLLRDHUP isn't supported on NTO")]
 fn unix_stream_shutdown_read() {
     let (mut poll, mut events) = init_with_poll();
     let (handle, remote_addr) = new_echo_listener(1, "unix_stream_shutdown_read");
@@ -365,6 +366,7 @@ fn unix_stream_shutdown_both() {
 
 #[test]
 #[cfg_attr(target_os = "solaris", ignore = "POLLRDHUP isn't supported on Solaris")]
+#[cfg_attr(target_os = "nto", ignore = "POLLRDHUP isn't supported on NTO")]
 fn unix_stream_shutdown_listener_write() {
     let (mut poll, mut events) = init_with_poll();
     let barrier = Arc::new(Barrier::new(2));