diff --git a/challenges/basic-bonfires.json b/challenges/basic-bonfires.json
index d3a0f22893..e2e2fa0e3f 100644
--- a/challenges/basic-bonfires.json
+++ b/challenges/basic-bonfires.json
@@ -143,7 +143,7 @@
         "assert(palindrome(\"almostomla\") === false, 'message: <code>palindrome(\"almostomla\")</code> should return false.');",
         "assert(palindrome(\"My age is 0, 0 si ega ym.\") === true, 'message: <code>palindrome(\"My age is 0, 0 si ega ym.\")</code> should return true.');",
         "assert(palindrome(\"1 eye for of 1 eye.\") === false, 'message: <code>palindrome(\"1 eye for of 1 eye.\")</code> should return false.');",
-        "assert(palindrome(\"0_0 (: /-\\ :) 0-0\") === true, 'message: <code>palindrome(\"0_0 (: /-\\\\ :) 0-0\")</code> should return true.');"
+        "assert(palindrome(\"0_0 (: /-\\ :) 0-0\") === true, 'message: <code>palindrome(\"0_0 (: /-\\ :) 0-0\")</code> should return true.');"
       ],
       "challengeSeed": [
         "function palindrome(str) {",