diff --git a/src/liballoc/tests/lib.rs b/src/liballoc/tests/lib.rs
index 61377018455a..c5beb63d12e9 100644
--- a/src/liballoc/tests/lib.rs
+++ b/src/liballoc/tests/lib.rs
@@ -51,6 +51,9 @@ fn hash<T: Hash>(t: &T) -> u64 {
     s.finish()
 }
 
+// FIXME: Instantiated functions with i128 in the signature is not supported in Emscripten.
+// See https://github.com/kripken/emscripten-fastcomp/issues/169
+#[cfg(not(target_os = "emscripten"))]
 #[test]
 fn test_boxed_hasher() {
     let ordinary_hash = hash(&5u32);
diff --git a/src/libcore/tests/hash/mod.rs b/src/libcore/tests/hash/mod.rs
index 49e41f02428c..e8ea6044f5ff 100644
--- a/src/libcore/tests/hash/mod.rs
+++ b/src/libcore/tests/hash/mod.rs
@@ -110,6 +110,9 @@ fn test_custom_state() {
     assert_eq!(hash(&Custom { hash: 5 }), 5);
 }
 
+// FIXME: Instantiated functions with i128 in the signature is not supported in Emscripten.
+// See https://github.com/kripken/emscripten-fastcomp/issues/169
+#[cfg(not(target_os = "emscripten"))]
 #[test]
 fn test_indirect_hasher() {
     let mut hasher = MyHasher { hash: 0 };
diff --git a/src/tools/tidy/src/pal.rs b/src/tools/tidy/src/pal.rs
index 8092a9e156be..fdbcfd10bde7 100644
--- a/src/tools/tidy/src/pal.rs
+++ b/src/tools/tidy/src/pal.rs
@@ -76,6 +76,7 @@ const EXCEPTION_PATHS: &'static [&'static str] = &[
 
     // std testing crates, ok for now at least
     "src/libcore/tests",
+    "src/liballoc/tests/lib.rs",
 
     // non-std crates
     "src/test",