diff --git a/implementation-contributed/javascriptcore/stress/cfa-expected-values-must-set-clobbered-to-false.js b/implementation-contributed/javascriptcore/stress/cfa-expected-values-must-set-clobbered-to-false.js
new file mode 100644
index 0000000000..99f282e04a
--- /dev/null
+++ b/implementation-contributed/javascriptcore/stress/cfa-expected-values-must-set-clobbered-to-false.js
@@ -0,0 +1,38 @@
+//@ runDefault("--useFTLJIT=0", "--useConcurrentJIT=false")
+
+let num = 150;
+
+function foo(comp, o, b) {
+    let sum = o.f;
+    if (b)
+        OSRExit();
+    for (let i = 0; i < comp; ++i) {
+        sum += o.f;
+    }
+    return sum;
+}
+noInline(foo);
+
+let o = {f:25};
+let o2 = {f:25, g:44};
+o2.f = 45;
+o2.f = 45;
+o2.f = 45;
+o2.f = 45;
+let comp = {
+    valueOf() { return num; }
+}
+
+foo(comp, o2, true);
+foo(comp, o2, true);
+for (let i = 0; i < 500; ++i) {
+    foo(comp, o2, false);
+}
+
+let o3 = {g:24, f:73};
+num = 10000000;
+let result = foo(comp, o3, false);
+
+if (result !== (num + 1)*73) {
+    throw new Error("Bad: " + result);
+}