diff --git a/seed/challenges/01-front-end-development-certification/basic-javascript.json b/seed/challenges/01-front-end-development-certification/basic-javascript.json
index ec7ca428c0..c7bc96e1f5 100644
--- a/seed/challenges/01-front-end-development-certification/basic-javascript.json
+++ b/seed/challenges/01-front-end-development-certification/basic-javascript.json
@@ -576,7 +576,7 @@
         ""
       ],
       "tail": [
-        "(function(a,b,c){ return \"a = \" + a + \", b = \" + b + \", c = '\" + c + \"'\"; })(a,b,c);"
+        "(function(a,b,c){ return \"a = \" + a + \", b = \" + b + \", c = \" + c; })(a,b,c);"
       ],
       "solutions": [
         "var a = 3;\nvar b = 17;\nvar c = 12;\n\na += 12;\nb += 9;\nc += 7;"
@@ -617,7 +617,7 @@
         ""
       ],
       "tail": [
-        "(function(a,b,c){ return \"a = \" + a + \", b = \" + b + \", c = '\" + c + \"'\"; })(a,b,c);"
+        "(function(a,b,c){ return \"a = \" + a + \", b = \" + b + \", c = \" + c; })(a,b,c);"
       ],
       "solutions": [
         "var a = 11;\nvar b = 9;\nvar c = 3;\n\na -= 6;\nb -= 15;\nc -= 1;\n\n"
@@ -658,7 +658,7 @@
         ""
       ],
       "tail": [
-        "(function(a,b,c){ return \"a = \" + a + \", b = \" + b + \", c = '\" + c + \"'\"; })(a,b,c);"
+        "(function(a,b,c){ return \"a = \" + a + \", b = \" + b + \", c = \" + c; })(a,b,c);"
       ],
       "solutions": [
         "var a = 5;\nvar b = 12;\nvar c = 4.6;\n\na *= 5;\nb *= 3;\nc *= 10;"
@@ -2688,7 +2688,7 @@
         "function myTest(val) {\n  if(val < 5) {\n    return \"Less than 5\";            \n  } else if (val < 10) {\n    return \"Less than 10\";\n  } else {\n    return \"Greater than or equal to 10\";\n  }\n}"
       ],
       "tests": [
-        "assert(myTest(4) === \"Less than 5\", 'message: <code>myTest(5)</code> should return \"Less than 5\"');",
+        "assert(myTest(4) === \"Less than 5\", 'message: <code>myTest(4)</code> should return \"Less than 5\"');",
         "assert(myTest(6) === \"Less than 10\", 'message: <code>myTest(6)</code> should return \"Less than 10\"');",
         "assert(myTest(11) === \"Greater than or equal to 10\", 'message: <code>myTest(11)</code> should return \"Greater than or equal to 10\"');"
       ],
diff --git a/seed/challenges/01-front-end-development-certification/html5-and-css.json b/seed/challenges/01-front-end-development-certification/html5-and-css.json
index 9a8fde63d1..01c565765e 100644
--- a/seed/challenges/01-front-end-development-certification/html5-and-css.json
+++ b/seed/challenges/01-front-end-development-certification/html5-and-css.json
@@ -502,7 +502,7 @@
         "assert($(\"p\").length > 1, 'message: You need 2 <code>p</code> elements with Kitty Ipsum text.');",
         "assert(code.match(/<\\/p>/g) && code.match(/<\\/p>/g).length === code.match(/<p/g).length, 'message: Make sure each of your <code>p</code> elements has a closing tag.');",
         "assert.isTrue((/Purr\\s+jump\\s+eat/gi).test($(\"p\").text()), 'message: Your <code>p</code> element should contain the first few words of the provided additional <code>kitty ipsum text</code>.');",
-        "assert($(\"p:eq(0)\").css(\"font-size\") === \"16px\" && $(\"p:eq(1)\").css(\"font-size\") === \"16px\", 'message: Give elements with the <code>p</code> tag a <code>font-size</code> of <code>16px</code>.')"
+        "assert(Number.parseInt($(\"p:eq(0)\").css(\"font-size\"), 10) > 15 && Number.parseInt($(\"p:eq(1)\").css(\"font-size\"), 10) > 15, 'message: Give elements with the <code>p</code> tag a <code>font-size</code> of <code>16px</code>.')"
       ],
       "type": "waypoint",
       "challengeType": 0,
diff --git a/seed/challenges/03-back-end-development-certification/advanced-bonfires.json b/seed/challenges/03-back-end-development-certification/advanced-bonfires.json
index d32ab41b33..740fa152c3 100644
--- a/seed/challenges/03-back-end-development-certification/advanced-bonfires.json
+++ b/seed/challenges/03-back-end-development-certification/advanced-bonfires.json
@@ -104,7 +104,7 @@
         "assert.deepEqual(sym([1, 2, 5], [2, 3, 5], [3, 4, 5]).sort(), [1, 4, 5], 'message: <code>sym([1, 2, 5], [2, 3, 5], [3, 4, 5])</code> should return <code>[1, 4, 5]</code>');",
         "assert.deepEqual(sym([1, 1, 2, 5], [2, 2, 3, 5], [3, 4, 5, 5]).sort(), [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.deepEqual(sym([3, 3, 3, 2, 5], [2, 1, 5, 7], [3, 4, 6, 6], [1, 2, 3]).sort(), [2, 3, 4, 6, 7], '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>.');",
-        "assert.deepEqual(sym([3, 3, 3, 2, 5], [2, 1, 5, 7], [3, 4, 6, 6], [1, 2, 3], [5, 3, 9, 8], [1]).sort(), [1, 2, 4, 5, 6, 7, 8, 9], 'message: <code>sym([3, 3, 3, 2, 5], [2, 1, 5, 7], [3, 4, 6, 6], [1, 2, 3], [5, 3, 9, 8], [1])</code> should return <code>[1, 2, 5, 6, 7, 8, 9]</code>')"
+        "assert.deepEqual(sym([3, 3, 3, 2, 5], [2, 1, 5, 7], [3, 4, 6, 6], [1, 2, 3], [5, 3, 9, 8], [1]).sort(), [1, 2, 4, 5, 6, 7, 8, 9], 'message: <code>sym([3, 3, 3, 2, 5], [2, 1, 5, 7], [3, 4, 6, 6], [1, 2, 3], [5, 3, 9, 8], [1])</code> should return <code>[1, 2, 4, 5, 6, 7, 8, 9]</code>')"
        ],
       "MDNlinks": [
         "Array.reduce()",