diff --git a/challenges/basic-javascript.json b/challenges/basic-javascript.json
index d859b185b9..3be431ae7a 100644
--- a/challenges/basic-javascript.json
+++ b/challenges/basic-javascript.json
@@ -368,14 +368,14 @@
       "description": [
         "",
         "in JavaScript we can can work with decimal numbers",
-        "Let's create a variable <code>myfloat</code> and give it a decimal value."
+        "Let's create a variable <code>myDecimal</code> and give it a decimal value."
       ],
       "tests": [
-        "assert((function(){if(typeof(myDecimal) != 'undefined' && typeof(myDecimal) == 'number' && editor.getValue().match(/\\./g).length >=2){return(true);}else{return(false);}})(), 'myFloat should be a decimal point number');"
+        "assert((function(){if(typeof(myDecimal) != 'undefined' && typeof(myDecimal) == 'number' && editor.getValue().match(/\\./g).length >=2){return(true);}else{return(false);}})(), 'myDecimal should be a decimal point number');"
       ],
       "challengeSeed": [
         "//var ourDecimal = 5.7",
-        "//Create a number with a decimal point here called myFloat",
+        "//Create a number with a decimal point here called myDecimal",
         "",
         "",
         "",
@@ -448,7 +448,7 @@
         "Let's now go create a nested array called <code>myArray</code>"
       ],
       "tests":[
-        "assert((function(){if(typeof(myArray) !== 'undefined' && typeof(myArray) === 'object' && typeof(myArray[0]) !== 'undefined' && typeof(myArray[0]) === 'object' && editor.getValue().match(/[[]]/g).length >= 1){return(true);}else{return(false);}})(), 'myArray should contain at least one array');"
+        "assert((function(){if(typeof(myArray) !== 'undefined' && typeof(myArray) === 'object' && typeof(myArray[0]) !== 'undefined' && typeof(myArray[0]) === 'object' && editor.getValue().match(/\\[\\[/g).length >= 1 && editor.getValue().match(/\\]\\]/g).length >= 1){return(true);}else{return(false);}})(), 'myArray should contain at least one array');"
       ],
       "challengeSeed":[
         "var myArray = [];",
diff --git a/challenges/html5-and-css.json b/challenges/html5-and-css.json
index 793ef6f8ce..7cbb0d11c7 100644
--- a/challenges/html5-and-css.json
+++ b/challenges/html5-and-css.json
@@ -1528,7 +1528,8 @@
         "  <li>cat nip</li>",
         "  <li>laser pointers</li>",
         "  <li>lasagna</li>",
-        "</ul>"
+        "</ul>",
+        "<p>Top 3 things cats hate:</p>"
       ],
       "challengeType": 0,
       "nameCn": "",
@@ -1561,7 +1562,7 @@
         "Create an <code>input</code> element of type \"text\" below your lists."
       ],
       "tests": [
-        "assert($('input').length > 0, 'Your app should have a text field input element.')"
+        "assert($('input[type=text]').length > 0, 'Your app should have a text field input element.')"
       ],
       "challengeSeed": [
         "<link href='http://fonts.googleapis.com/css?family=Lobster' rel='stylesheet' type='text/css'>",
@@ -2150,7 +2151,7 @@
         "Set the first of your radio buttons and the first of your checkboxes to both be checked by default."
       ],
       "tests": [
-        "assert($('input[type=\"radio\"]').prop('checked'), 'Your first radio button on your form should be checked by default.');",
+        "assert($('input[type=\"radio\"]').prop('checked'), 'Your first radio button on your form should be checked by default.')",
         "assert($('input[type=\"checkbox\"]').prop('checked'), 'Your first checkbox on your form should be checked by default.')"
       ],
       "challengeSeed": [
@@ -2738,7 +2739,7 @@
         "An element's <code>margin</code> controls the amount of space between an element's <code>border</code> and surrounding elements.",
         "If you set an element's <code>margin</code> to a negative value, the element will grow larger.",
         "Try to set the <code>margin</code> to a negative value like the one for the red box.",
-        "Change the <code>margin</code> of the green box to a negative value, so it fills the entire horizontal width of the yellow box around it."
+        "Change the <code>margin</code> of the green box to -15 pixels, so it fills the entire horizontal width of the yellow box around it."
       ],
       "tests": [
         "assert($('.green-box').css('margin-top') === '-15px', 'Your <code>green-box</code> class should give elements -15px of margin.')"
diff --git a/challenges/jquery-ajax-and-json.json b/challenges/jquery-ajax-and-json.json
index 53674a7280..92509ffade 100644
--- a/challenges/jquery-ajax-and-json.json
+++ b/challenges/jquery-ajax-and-json.json
@@ -112,7 +112,7 @@
       ],
       "tests": [
         "assert($('.well').hasClass('animated') && $('.well').hasClass('shake'), 'Use the jQuery <code>addClass()</code> function to give the classes \"animated\" and \"shake\" to all your elements with the class \"well\".')",
-        "assert(!editor.match(/class.*animated/g), 'Only use jQuery to add these classes to the element.')"
+        "assert(!editor.match(/class\\.\\*animated/g), 'Only use jQuery to add these classes to the element.')"
       ],
       "challengeSeed": [
         "fccss",
@@ -630,8 +630,8 @@
       ],
       "tests": [
         "assert($('#left-well').css('background-color') === 'rgb(255, 0, 0)', 'Your \"target1\" element should have red text.')",
-        "assert(!editor.match(/\\.parent\\(\\)\\.css/g), 'You should use the <code>parent()</code> function to modify this element.')",
-        "assert(!editor.match(/<div class=\\'well\\' id=\\'left-well\\'>/g), 'Only use jQuery to add these classes to the element.')"
+        "assert(editor.match(/\\.parent\\(\\)\\.css/g), 'You should use the <code>parent()</code> function to modify this element.')",
+        "assert(editor.match(/<div class=\\'well\\' id=\\'left-well\\'>/g), 'Only use jQuery to add these classes to the element.')"
       ],
       "challengeSeed": [
         "fccss",