diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/parallel/spew.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/parallel/spew.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,11 @@
+load(libdir + "parallelarray-helpers.js");
+
+try {
+    var spew = getSelfHostedValue("ParallelSpew");
+} catch (e) {}
+if (getBuildConfiguration().parallelJS && spew) {
+  assertParallelExecSucceeds(
+    function (m) { Array.buildPar(minItemsTestingThreshold,
+                                  function (i) { spew(i + ""); }); },
+    function (r) { return true; });
+}