diff --git a/test/language/expressions/class/subclass-builtins/subclass-WeakRef.js b/test/language/expressions/class/subclass-builtins/subclass-WeakRef.js
index 7d841a4b86..fc322d8e42 100644
--- a/test/language/expressions/class/subclass-builtins/subclass-WeakRef.js
+++ b/test/language/expressions/class/subclass-builtins/subclass-WeakRef.js
@@ -10,6 +10,6 @@ flags: [generated]
 
 const Subclass = class extends WeakRef {}
 
-const sub = new Subclass();
+const sub = new Subclass({});
 assert(sub instanceof Subclass);
 assert(sub instanceof WeakRef);
diff --git a/test/language/statements/class/subclass-builtins/subclass-WeakRef.js b/test/language/statements/class/subclass-builtins/subclass-WeakRef.js
index 8f949f1a96..7a07fe08d0 100644
--- a/test/language/statements/class/subclass-builtins/subclass-WeakRef.js
+++ b/test/language/statements/class/subclass-builtins/subclass-WeakRef.js
@@ -10,6 +10,6 @@ flags: [generated]
 
 class Subclass extends WeakRef {}
 
-const sub = new Subclass();
+const sub = new Subclass({});
 assert(sub instanceof Subclass);
 assert(sub instanceof WeakRef);