diff --git a/src/libstd/io/net/pipe.rs b/src/libstd/io/net/pipe.rs
index bdd58b07d86..35d97df0c37 100644
--- a/src/libstd/io/net/pipe.rs
+++ b/src/libstd/io/net/pipe.rs
@@ -751,6 +751,7 @@ pub fn smalltest(server: proc(UnixStream):Send, client: proc(UnixStream):Send) {
         assert!(a2.accept().is_ok());
     })
 
+    #[cfg(not(windows))] // FIXME #17553
     iotest!(fn clone_accept_concurrent() {
         let addr = next_test_unix();
         let l = UnixListener::bind(&addr);
diff --git a/src/libstd/io/net/udp.rs b/src/libstd/io/net/udp.rs
index 6689615f01b..840fcff95f1 100644
--- a/src/libstd/io/net/udp.rs
+++ b/src/libstd/io/net/udp.rs
@@ -545,6 +545,7 @@ pub fn socket_name(addr: SocketAddr) {
         serv_rx.recv();
     })
 
+    #[cfg(not(windows))] // FIXME #17553
     iotest!(fn recv_from_timeout() {
         let addr1 = next_test_ip4();
         let addr2 = next_test_ip4();