diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/parallel/Array-reducePar-sum.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/parallel/Array-reducePar-sum.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,9 @@
+load(libdir + "parallelarray-helpers.js");
+
+function testReduce() {
+  function sum(v, p) { return v+p; }
+  assertArraySeqParResultsEq(range(1, 513), "reduce", sum);
+}
+
+if (getBuildConfiguration().parallelJS)
+  testReduce();