diff --git a/challenges/01-front-end-development-certification/basic-bonfires.json b/challenges/01-front-end-development-certification/basic-bonfires.json
index b64d5a886b..1025375b0a 100644
--- a/challenges/01-front-end-development-certification/basic-bonfires.json
+++ b/challenges/01-front-end-development-certification/basic-bonfires.json
@@ -403,7 +403,8 @@
       "tests": [
         "assert(largestOfFour([[4, 5, 1, 3], [13, 27, 18, 26], [32, 35, 37, 39], [1000, 1001, 857, 1]]).constructor === Array, 'message: <code>largestOfFour([[4, 5, 1, 3], [13, 27, 18, 26], [32, 35, 37, 39], [1000, 1001, 857, 1]])</code> should return an array.');",
         "assert.deepEqual(largestOfFour([[13, 27, 18, 26], [4, 5, 1, 3], [32, 35, 37, 39], [1000, 1001, 857, 1]]), [27,5,39,1001], 'message: <code>largestOfFour([[13, 27, 18, 26], [4, 5, 1, 3], [32, 35, 37, 39], [1000, 1001, 857, 1]])</code> should return <code>[27,5,39,1001]</code>.');",
-        "assert.deepEqual(largestOfFour([[4, 9, 1, 3], [13, 35, 18, 26], [32, 35, 97, 39], [1000000, 1001, 857, 1]]), [9,35,97,1000000], 'message: <code>largestOfFour([[4, 9, 1, 3], [13, 35, 18, 26], [32, 35, 97, 39], [1000000, 1001, 857, 1]])</code> should return <code>[9, 35, 97, 1000000]</code>.');"
+        "assert.deepEqual(largestOfFour([[4, 9, 1, 3], [13, 35, 18, 26], [32, 35, 97, 39], [1000000, 1001, 857, 1]]), [9,35,97,1000000], 'message: <code>largestOfFour([[4, 9, 1, 3], [13, 35, 18, 26], [32, 35, 97, 39], [1000000, 1001, 857, 1]])</code> should return <code>[9, 35, 97, 1000000]</code>.');",
+        "assert.deepEqual(largestOfFour([[-2, -7, -9, -4], [-13, -7, -100, -10], [-39, -37, -95, -32], [-1, -1001, -857, -1000000]]), [-2, -7, -32, -1], 'message: <code>largestOfFour([[-2, -7, -9, -4], [-13, -7, -100, -10], [-39, -37, -95, -32], [-1, -1001, -857, -1000000]])</code> should return <code>[-2, -7, -32, -1]</code>.');"
       ],
       "type": "bonfire",
       "isRequired": true,