diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/parallel/surfaces-3.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/parallel/surfaces-3.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,4 @@
+// ParallelArray objects are frozen.
+
+// FIXME(bug 844988) immutability not enforced
+// if (getBuildConfiguration().parallelJS) assertEq(Object.isFrozen(new ParallelArray), true);