diff --git a/challenges/basic-javascript.json b/challenges/basic-javascript.json
index f1f1a21f89..2e9e21ffe2 100644
--- a/challenges/basic-javascript.json
+++ b/challenges/basic-javascript.json
@@ -448,7 +448,7 @@
         "Let's now go create a nested array called <code>myArray</code>"
       ],
       "tests":[
-        "assert((function(){if(typeof(myArray) !== 'undefined' && typeof(myArray) === 'object' && typeof(myArray[0]) !== 'undefined' && typeof(myArray[0]) === 'object' && editor.getValue().match(/[[]]/g).length >= 1){return(true);}else{return(false);}})(), 'myArray should contain at least one array');"
+        "assert((function(){if(typeof(myArray) !== 'undefined' && typeof(myArray) === 'object' && typeof(myArray[0]) !== 'undefined' && typeof(myArray[0]) === 'object' && editor.getValue().match(/\\[\\[/g).length >= 1 && editor.getValue().match(/\\]\\]/g).length >= 1){return(true);}else{return(false);}})(), 'myArray should contain at least one array');"
       ],
       "challengeSeed":[
         "var myArray = [];",