diff --git a/src/libstd/io/fs.rs b/src/libstd/io/fs.rs
index 58c0caa3402..ffccb0e8cb1 100644
--- a/src/libstd/io/fs.rs
+++ b/src/libstd/io/fs.rs
@@ -1106,9 +1106,8 @@ pub fn tmpdir() -> TempDir {
         file.fsync().unwrap();
         file.datasync().unwrap();
         drop(file);
-    })
+    } #[ignore(cfg(windows))])
 
-    #[ignore(cfg(windows))] // FIXME(#11638)
     iotest!(fn truncate_works() {
         let tmpdir = tmpdir();
         let path = tmpdir.join("in.txt");
@@ -1138,7 +1137,7 @@ pub fn tmpdir() -> TempDir {
         assert_eq!(File::open(&path).read_to_end().unwrap(),
                    (bytes!("fo", 0, 0, 0, 0, "wut")).to_owned());
         drop(file);
-    })
+    } #[ignore(cfg(windows))]) // FIXME(#11638)
 
     iotest!(fn open_flavors() {
         let tmpdir = tmpdir();
diff --git a/src/libstd/io/net/unix.rs b/src/libstd/io/net/unix.rs
index a1f3cbbe326..c3e3d72c672 100644
--- a/src/libstd/io/net/unix.rs
+++ b/src/libstd/io/net/unix.rs
@@ -192,7 +192,7 @@ pub fn smalltest(server: proc(UnixStream), client: proc(UnixStream)) {
         }, proc(_client) {
             // drop the client
         })
-    })
+    } #[ignore(cfg(windows))]) // FIXME(#12516)
 
     iotest!(fn write_begone() {
         smalltest(proc(mut server) {
diff --git a/src/libstd/io/process.rs b/src/libstd/io/process.rs
index b3365726465..b8eaf3bc648 100644
--- a/src/libstd/io/process.rs
+++ b/src/libstd/io/process.rs
@@ -823,11 +823,10 @@ pub fn sleeper() -> Process {
         assert!(!p.wait().success());
     })
 
-    #[ignore(cfg(windows))]
     iotest!(fn test_exists() {
         let mut p = sleeper();
         assert!(Process::kill(p.id(), 0).is_ok());
         p.signal_kill().unwrap();
         assert!(!p.wait().success());
-    })
+    } #[ignore(cfg(windows))]) // FIXME(#12516)
 }