diff --git a/challenges/basic-javascript.json b/challenges/basic-javascript.json
index a4c3cabdb9..a26a417c87 100644
--- a/challenges/basic-javascript.json
+++ b/challenges/basic-javascript.json
@@ -936,6 +936,7 @@
       "tests":[
         "assert(myFunction() >= min, 'The random number that\\'s generated by myFunction should be greater than or equal to the minimum number');",
         "assert(myFunction() <= max, 'The random number that\\'s generated by myFunction should be less than or equal to the maximum number');",
+        "assert(myFunction() % 1 === 0 , 'The random number that\\'s generated by myFunction should be an integer');",
         "assert((function(){if(editor.getValue().match(/max/g).length >= 2 && editor.getValue().match(/min/g).length >= 2 && editor.getValue().match(/Math.floor/g) && editor.getValue().match(/Math.random/g)){return true;}else{return false;}})(), 'You should be using the function given in the description to calculate the random in number in a range');"
       ],
       "challengeSeed":[