2 files changed, 4 insertions, 0 deletions
diff --git a/src/libstd/sys/common/io.rs b/src/libstd/sys/common/io.rs
index 3cd70eddb85..2778ed9326c 100644
--- a/src/libstd/sys/common/io.rs
+++ b/src/libstd/sys/common/io.rs
@@ -165,6 +165,7 @@ mod tests {
     }
 
     #[bench]
+    #[cfg_attr(target_os = "emscripten", ignore)]
     fn bench_uninitialized(b: &mut ::test::Bencher) {
         b.iter(|| {
             let mut lr = repeat(1).take(10000000);
diff --git a/src/libstd/sys/common/remutex.rs b/src/libstd/sys/common/remutex.rs
index cbdeaad7f6b..4935afe6afc 100644
--- a/src/libstd/sys/common/remutex.rs
+++ b/src/libstd/sys/common/remutex.rs
@@ -181,6 +181,7 @@ mod tests {
     }
 
     #[test]
+    #[cfg_attr(target_os = "emscripten", ignore)]
     fn is_mutex() {
         let m = Arc::new(ReentrantMutex::new(RefCell::new(0)));
         let m2 = m.clone();
@@ -198,6 +199,7 @@ mod tests {
     }
 
     #[test]
+    #[cfg_attr(target_os = "emscripten", ignore)]
     fn trylock_works() {
         let m = Arc::new(ReentrantMutex::new(()));
         let m2 = m.clone();
@@ -218,6 +220,7 @@ mod tests {
     }
 
     #[test]
+    #[cfg_attr(target_os = "emscripten", ignore)]
     fn poison_works() {
         let m = Arc::new(ReentrantMutex::new(RefCell::new(0)));
         let mc = m.clone();