diff --git a/challenges/03-front-end-libraries/sass.json b/challenges/03-front-end-libraries/sass.json
index 100018e5d59..8b4b045b14f 100644
--- a/challenges/03-front-end-libraries/sass.json
+++ b/challenges/03-front-end-libraries/sass.json
@@ -164,7 +164,7 @@
       "tests": [
         {
           "text": "Your code should declare a <code>mixin</code> named <code>border-radius</code> which has a parameter named <code>$radius</code>.",
-          "testString": "assert(code.match(/@mixin\\s+?border-radius\\(\\s*?\\$radius\\s*?\\)\\s*?{/gi), 'Your code should declare a <code>mixin</code> named <code>border-radius</code> which has a parameter named <code>$radius</code>.');"
+          "testString": "assert(code.match(/@mixin\\s+?border-radius\\s*?\\(\\s*?\\$radius\\s*?\\)\\s*?{/gi), 'Your code should declare a <code>mixin</code> named <code>border-radius</code> which has a parameter named <code>$radius</code>.');"
         },
         {
           "text": "Your code should include the <code>-webkit-border-radius</code> vender prefix that uses the <code>$radius</code> parameter.",
@@ -656,4 +656,4 @@
       }
     }
   ]
-}
\ No newline at end of file
+}