diff --git a/seed/challenges/advanced-bonfires.json b/seed/challenges/advanced-bonfires.json
index 115b236eba..a1decfaa34 100644
--- a/seed/challenges/advanced-bonfires.json
+++ b/seed/challenges/advanced-bonfires.json
@@ -91,7 +91,8 @@
       "tests": [
         "assert.sameMembers(sym([1, 2, 3], [5, 2, 1, 4]), [3, 5, 4], 'message: <code>sym([1, 2, 3], [5, 2, 1, 4])</code> should return <code>[3, 5, 4]</code>.');",
         "assert.sameMembers(sym([1, 2, 5], [2, 3, 5], [3, 4, 5]), [1, 4, 5], 'message: <code>sym([1, 2, 5], [2, 3, 5], [3, 4, 5])</code> should return <code>[1, 4, 5]</code>');",
-        "assert.sameMembers(sym([1, 1, 2, 5], [2, 2, 3, 5], [3, 4, 5, 5]), [1, 4, 5], 'message: <code>sym([1, 1, 2, 5], [2, 2, 3, 5], [3, 4, 5, 5])</code> should return <code>[1, 4, 5]</code>.');"
+        "assert.sameMembers(sym([1, 1, 2, 5], [2, 2, 3, 5], [3, 4, 5, 5]), [1, 4, 5], 'message: <code>sym([1, 1, 2, 5], [2, 2, 3, 5], [3, 4, 5, 5])</code> should return <code>[1, 4, 5]</code>.');",
+        "assert.sameMembers(sym([3, 3, 3, 2, 5], [2, 1, 5, 7], [3, 4, 6, 6], [1, 2, 3]), [ 7, 4, 6, 2, 3 ], 'message: <code>sym([3, 3, 3, 2, 5], [2, 1, 5, 7], [3, 4, 6, 6], [1, 2, 3])</code> should return <code>[ 7, 4, 6, 2, 3 ]</code>.');"
        ],
       "MDNlinks": [
         "Array.reduce()",