diff --git a/tests/test020.js b/tests/test020.js
new file mode 100644
index 0000000..cfd9656
--- /dev/null
+++ b/tests/test020.js
@@ -0,0 +1,8 @@
+// Test reported by sterowang, Variable attribute defines conflict with function.
+
+function a (){};
+b = {};
+b.a = {};
+a();
+
+result = 1;