diff --git a/tests/close_on_drop.rs b/tests/close_on_drop.rs
index c9370799b..8d9eefcca 100644
--- a/tests/close_on_drop.rs
+++ b/tests/close_on_drop.rs
@@ -1,3 +1,4 @@
+#![cfg(not(target_os = "wasi"))]
 #![cfg(all(feature = "os-poll", feature = "net"))]
 
 use std::io::Read;
diff --git a/tests/events.rs b/tests/events.rs
index c468e55ef..c71a0b288 100644
--- a/tests/events.rs
+++ b/tests/events.rs
@@ -1,3 +1,4 @@
+#![cfg(not(target_os = "wasi"))]
 #![cfg(all(feature = "os-poll", feature = "net"))]
 
 use std::time::Duration;
diff --git a/tests/poll.rs b/tests/poll.rs
index 86fdc21cf..22db7b739 100644
--- a/tests/poll.rs
+++ b/tests/poll.rs
@@ -1,3 +1,4 @@
+#![cfg(not(target_os = "wasi"))]
 #![cfg(all(feature = "os-poll", feature = "net"))]
 
 use std::net;
diff --git a/tests/registering.rs b/tests/registering.rs
index 4921132ae..c8415b831 100644
--- a/tests/registering.rs
+++ b/tests/registering.rs
@@ -1,3 +1,4 @@
+#![cfg(not(target_os = "wasi"))]
 #![cfg(all(feature = "os-poll", feature = "net"))]
 
 use std::io::{self, Write};
diff --git a/tests/regressions.rs b/tests/regressions.rs
index f41c6cae5..0e3e5a9d8 100644
--- a/tests/regressions.rs
+++ b/tests/regressions.rs
@@ -1,3 +1,4 @@
+#![cfg(not(target_os = "wasi"))]
 #![cfg(all(feature = "os-poll", feature = "net"))]
 
 use std::io::{self, Read};
diff --git a/tests/tcp.rs b/tests/tcp.rs
index 6ff38d2ca..cc08f2820 100644
--- a/tests/tcp.rs
+++ b/tests/tcp.rs
@@ -1,3 +1,4 @@
+#![cfg(not(target_os = "wasi"))]
 #![cfg(all(feature = "os-poll", feature = "net"))]
 
 use mio::net::{TcpListener, TcpStream};
diff --git a/tests/tcp_listener.rs b/tests/tcp_listener.rs
index fdb1c08a9..086e619f7 100644
--- a/tests/tcp_listener.rs
+++ b/tests/tcp_listener.rs
@@ -1,3 +1,4 @@
+#![cfg(not(target_os = "wasi"))]
 #![cfg(all(feature = "os-poll", feature = "net"))]
 
 use mio::net::TcpListener;
diff --git a/tests/tcp_stream.rs b/tests/tcp_stream.rs
index a0c7d3b79..a2288a173 100644
--- a/tests/tcp_stream.rs
+++ b/tests/tcp_stream.rs
@@ -1,3 +1,4 @@
+#![cfg(not(target_os = "wasi"))]
 #![cfg(all(feature = "os-poll", feature = "net"))]
 
 use std::io::{self, IoSlice, IoSliceMut, Read, Write};
diff --git a/tests/udp_socket.rs b/tests/udp_socket.rs
index 05caf9d21..79b5d0312 100644
--- a/tests/udp_socket.rs
+++ b/tests/udp_socket.rs
@@ -1,3 +1,4 @@
+#![cfg(not(target_os = "wasi"))]
 #![cfg(all(feature = "os-poll", feature = "net"))]
 
 use log::{debug, info};
diff --git a/tests/util/mod.rs b/tests/util/mod.rs
index 3e4bb5f11..7eedc345f 100644
--- a/tests/util/mod.rs
+++ b/tests/util/mod.rs
@@ -1,5 +1,6 @@
 // Not all functions are used by all tests.
 #![allow(dead_code, unused_macros)]
+#![cfg(not(target_os = "wasi"))]
 #![cfg(all(feature = "os-poll", feature = "net"))]
 
 use std::mem::size_of;
diff --git a/tests/waker.rs b/tests/waker.rs
index 33998a187..56945d2cb 100644
--- a/tests/waker.rs
+++ b/tests/waker.rs
@@ -1,3 +1,4 @@
+#![cfg(not(target_os = "wasi"))]
 #![cfg(all(feature = "os-poll", feature = "net"))]
 
 use mio::{Events, Poll, Token, Waker};