diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-the-every-method-to-check-that-every-element-in-an-array-meets-a-criteria.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-the-every-method-to-check-that-every-element-in-an-array-meets-a-criteria.english.md
index 9b94dc7f353..8bb687acdf1 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-the-every-method-to-check-that-every-element-in-an-array-meets-a-criteria.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-the-every-method-to-check-that-every-element-in-an-array-meets-a-criteria.english.md
@@ -32,11 +32,11 @@ tests:
   - text: Your code should use the <code>every</code> method.
     testString: assert(code.match(/\.every/g));
   - text: <code>checkPositive([1, 2, 3, -4, 5])</code> should return <code>false</code>.
-    testString: assert(!checkPositive([1, 2, 3, -4, 5]));
+    testString: assert.isFalse(checkPositive([1, 2, 3, -4, 5]));
   - text: <code>checkPositive([1, 2, 3, 4, 5])</code> should return <code>true</code>.
-    testString: assert(checkPositive([1, 2, 3, 4, 5]));
+    testString: assert.isTrue(checkPositive([1, 2, 3, 4, 5]));
   - text: <code>checkPositive([1, -2, 3, -4, 5])</code> should return <code>false</code>.
-    testString: assert(!checkPositive([1, -2, 3, -4, 5]));
+    testString: assert.isFalse(checkPositive([1, -2, 3, -4, 5]));
 
 ```