diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/restrict-possible-usernames.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/restrict-possible-usernames.english.md
index ff3b541dc8..1367c9d2b1 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/restrict-possible-usernames.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/restrict-possible-usernames.english.md
@@ -44,7 +44,9 @@ tests:
   - text: Your regex should not match <code>BadUs3rnam3</code>
     testString: assert(!userCheck.test("BadUs3rnam3"));
   - text: Your regex should match <code>Z97</code>
-    testString: assert(userCheck.test("Z97"));    
+    testString: assert(userCheck.test("Z97"));
+  - text: Your regex should not match <code>c57bT3</code>
+    testString: assert(!userCheck.test("c57bT3"));  
 
 ```