1 files changed, 18 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/class/subclass-builtins/subclass-WeakRef.js b/js/src/tests/test262/language/statements/class/subclass-builtins/subclass-WeakRef.js
new file mode 100644
index 0000000000..fd97648922
--- /dev/null
+++ b/js/src/tests/test262/language/statements/class/subclass-builtins/subclass-WeakRef.js
@@ -0,0 +1,18 @@
+// |reftest| skip-if(!this.hasOwnProperty('WeakRef')) -- WeakRef is not enabled unconditionally
+// This file was procedurally generated from the following sources:
+// - src/subclass-builtins/WeakRef.case
+// - src/subclass-builtins/default/statement.template
+/*---
+description: new SubWeakRef() instanceof WeakRef (Subclass instanceof Heritage)
+features: [WeakRef]
+flags: [generated]
+---*/
+
+
+class Subclass extends WeakRef {}
+
+const sub = new Subclass({});
+assert(sub instanceof Subclass);
+assert(sub instanceof WeakRef);
+
+reportCompare(0, 0);