diff --git a/test/built-ins/Promise/prototype/S25.4.4.2_A1.1_T1.js b/test/built-ins/Promise/prototype/S25.4.4.2_A1.1_T1.js
index 4b9cbac28fd0216e3343e03e73278dc9be07dca1..04fdf667b720b40aef8e9b0ecf9a69be535d73b5 100644
--- a/test/built-ins/Promise/prototype/S25.4.4.2_A1.1_T1.js
+++ b/test/built-ins/Promise/prototype/S25.4.4.2_A1.1_T1.js
@@ -13,8 +13,3 @@ description: Promise prototype exists
 if (Promise.prototype === undefined) {
     $ERROR("Expected Promise.prototype to be defined.");
 }
-
-if (!(Promise.prototype instanceof Object)) {
-    $ERROR("Expected Promise.prototype to be an object.");
-}
-