diff --git a/js/src/jit-test/tests/basic/bug563243.js b/js/src/jit-test/tests/basic/bug563243.js
new file mode 100644
index 00000000000..64dc830e83d
--- /dev/null
+++ b/js/src/jit-test/tests/basic/bug563243.js
@@ -0,0 +1,7 @@
+// |jit-test| error:SyntaxError
+
+(function () {
+    for (a in (function () {
+        yield Array.reduce()
+    })()) function () {}
+})()