diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/inherit-behaviors-from-a-supertype.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/inherit-behaviors-from-a-supertype.english.md
index dde6a8f4c40..f9aed6ca63a 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/inherit-behaviors-from-a-supertype.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/inherit-behaviors-from-a-supertype.english.md
@@ -32,6 +32,10 @@ tests:
     testString: assert(typeof duck !== "undefined", 'The <code>duck</code> variable should be defined.');
   - text: The <code>beagle</code> variable should be defined.
     testString: assert(typeof beagle !== "undefined", 'The <code>beagle</code> variable should be defined.');
+  - text: The <code>duck</code> variable should be initialised with <code>Object.create</code>.
+    testString: assert(/(let|const|var)\s*beagle\s*=\s*Object\.create\s*\(\s*Animal\.prototype\s*\)\s*;/.test(code), 'The <code>duck</code> variable should be initialised with <code>Object.create</code>');
+  - text: The <code>beagle</code> variable should be initialised with <code>Object.create</code>.
+    testString: assert(/(let|const|var)\s*duck\s*=\s*Object\.create\s*\(\s*Animal\.prototype\s*\)\s*;/.test(code), 'The <code>beagle</code> variable should be initialised with <code>Object.create</code>.');
   - text: <code>duck</code> should have a <code>prototype</code> of <code>Animal</code>.
     testString: assert(duck instanceof Animal, '<code>duck</code> should have a <code>prototype</code> of <code>Animal</code>.');
   - text: <code>beagle</code> should have a <code>prototype</code> of <code>Animal</code>.