diff --git a/.canvas b/.canvas
new file mode 100644
index 000000000..391bac710
--- /dev/null
+++ b/.canvas
@@ -0,0 +1,6 @@
+---
+:lessons:
+- :id: 218933
+  :course_id: 6602
+  :canvas_url: https://learning.flatironschool.com/courses/6602/assignments/218933
+  :type: assignment
diff --git a/.github/workflows/canvas-sync-ruby-update.yml b/.github/workflows/canvas-sync-ruby-update.yml
new file mode 100644
index 000000000..f8818dc0c
--- /dev/null
+++ b/.github/workflows/canvas-sync-ruby-update.yml
@@ -0,0 +1,31 @@
+name: Sync with Canvas Ruby v2.7
+
+on:
+  push:
+    branches: [master, main]
+    paths:
+      - 'README.md'
+
+jobs:
+  sync:
+    name: Sync with Canvas
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: 2.7
+
+      - name: Install github-to-canvas
+        run: gem install github-to-canvas
+
+      # Secret stored in learn-co-curriculum Settings/Secrets
+      - name: Sync from .canvas file
+        run: github-to-canvas -a -lr
+        env:
+          CANVAS_API_KEY: ${{ secrets.CANVAS_API_KEY }}
+          CANVAS_API_PATH: ${{ secrets.CANVAS_API_PATH }}
diff --git a/.rspec b/.rspec
deleted file mode 100644
index 4e902e798..000000000
--- a/.rspec
+++ /dev/null
@@ -1,3 +0,0 @@
---color
---require spec_helper
---fail-fast
\ No newline at end of file
diff --git a/Gemfile b/Gemfile
deleted file mode 100644
index 99864cc30..000000000
--- a/Gemfile
+++ /dev/null
@@ -1,7 +0,0 @@
-source "https://rubygems.org"
-
-gem 'rspec'
-gem 'nokogiri'
-gem 'pry'
-gem 'css_parser'
-gem 'w3c_validators'
\ No newline at end of file
diff --git a/Gemfile.lock b/Gemfile.lock
deleted file mode 100644
index 733329bd3..000000000
--- a/Gemfile.lock
+++ /dev/null
@@ -1,47 +0,0 @@
-GEM
-  remote: https://rubygems.org/
-  specs:
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
-    coderay (1.1.2)
-    css_parser (1.7.0)
-      addressable
-    diff-lcs (1.3)
-    json (2.2.0)
-    method_source (0.9.2)
-    mini_portile2 (2.4.0)
-    nokogiri (1.10.3)
-      mini_portile2 (~> 2.4.0)
-    pry (0.12.2)
-      coderay (~> 1.1.0)
-      method_source (~> 0.9.0)
-    public_suffix (3.1.1)
-    rspec (3.8.0)
-      rspec-core (~> 3.8.0)
-      rspec-expectations (~> 3.8.0)
-      rspec-mocks (~> 3.8.0)
-    rspec-core (3.8.2)
-      rspec-support (~> 3.8.0)
-    rspec-expectations (3.8.4)
-      diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.8.0)
-    rspec-mocks (3.8.1)
-      diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.8.0)
-    rspec-support (3.8.2)
-    w3c_validators (1.3.4)
-      json (>= 1.8)
-      nokogiri (~> 1.6)
-
-PLATFORMS
-  ruby
-
-DEPENDENCIES
-  css_parser
-  nokogiri
-  pry
-  rspec
-  w3c_validators
-
-BUNDLED WITH
-   2.0.1
diff --git a/README.md b/README.md
index 7bee7b1ed..214af0fac 100644
--- a/README.md
+++ b/README.md
@@ -7,14 +7,30 @@
 
 ## Introduction
 
-HTML's role in our websites is to provide structure, content, and link
-resources (e.g. CSS files). Its role in describing the style ("presentation")
-of content is minimal. HTML's ability to style is pretty much limited to
-"pretty good" defaults.
+HTML's role in our websites is to provide structure, content, and link resources
+(e.g. CSS files). Its role in describing the style ("presentation") of content
+is minimal. HTML's ability to style is pretty much limited to "pretty good"
+defaults.
 
-In order to further customize the style, appearance, and interactive behavior
-of our websites, we turn to Cascading Style Sheets, or CSS. In this lab, we
-will work on implementing CSS declarations in our HTML.
+In order to further customize the style, appearance, and interactive behavior of
+our websites, we turn to Cascading Style Sheets, or CSS. In this lab, we will
+work on implementing CSS declarations in our HTML.
+
+## Writing HTML vs. Writing CSS
+
+|             | HTML | CSS |
+| ----------- | ---- | --- |
+| Deals with: | Content layer                                             | Presentation layer                                               |
+| Concerns:   | Structure, hierarchy & meaning                            | Aesthetic & display                                              |
+| Questions:  | - Should the order of items within a list matter?         | - Should the layout of the text be in a single or double column? |
+|             | - Should we wrap a list of links inside a navigation tag? | - Should we use a different font color for the header?           |
+|             | - Is this the most important header in the HTML document? | - How should the content appear on a desktop vs. a mobile device?  |
+
+## Getting Started
+
+**Fork and clone** this lesson into your local environment. Navigate into its
+directory in the terminal, then run `code .` to open the files in Visual Studio
+Code.
 
 ## Import a CSS File in Our HTML
 
@@ -23,60 +39,62 @@ First things first: we need to make sure our HTML is loading our style sheet.
 We have two options:
 
 1. Write CSS rules inside of a `<style>` tag ("internal CSS"), which tells HTML
-   "Hey, I want to define some CSS styling here
+   "Hey, I want to define some CSS styling here."
 2. Write CSS rules in an external file that is specified with the `<link>` tag
    ("external CSS").
 
 In our case, we want to provide a link to our style sheet, instead of writing
-all of our CSS code directly in the  `<style>` tag. This allows us to only have
+all of our CSS code directly in the `<style>` tag. This allows us to only have
 to write styles for the entire site once, instead of repeating every `<style>`
-element on every page.  A common workflow is to see developers work on CSS
-inside of the `<style>` tag until their styling is done. At that point they
-move it to their external file and remove the `<style>` element from the HTML
-page. Feel free to try it out!
+element on every page. A common workflow is to see developers work on CSS inside
+of the `<style>` tag until their styling is done. At that point they move it to
+their external file and remove the `<style>` element from the HTML page. Feel
+free to try it out!
 
 In `index.html`, provide a `<link>` tag which correctly sources the CSS file
-located in this directory. The `<link>` tag will link to our file with an
-`href` attribute, like so:
+located in this directory. The `<link>` tag will link to our file with an `href`
+attribute, like so:
 
-```HTML
-<link rel="stylesheet" href="relative path to CSS file">
+```html
+<link rel="stylesheet" href="relative path to CSS file" />
 ```
 
 The `href` attribute should point to the file `style.css` which is located in
-this directory using a _relative path_. The `rel` attribute is used to note
-that the file which is being linked has a **rel**ation of being a "stylesheet."
-
-Now, what is a relative path? You could write `href="style.css"` and the
-content of `style.css` would change your `index.html` file. But we want to
-teach you to require external resources (like CSS or JavaScript) by using
-_relative paths_. Relative paths make it _crystal clear_ which file is being
-used. Relative paths start with `./` which means "from the directory I am
-currently in." So, when we use `link` to associate with a style sheet and we
-write `href="./style.css"` we're saying: "From the directory in which I, the
-`index.html` file live, look for a file called `style.css` and use it. This
-pattern will help you and other developers remove any possible confusion.
-
-```HTML
-<link rel="stylesheet" href="relative path to CSS file">
+this directory using a _relative path_. The `rel` attribute is used to note that
+the file which is being linked has a **rel**ation of being a "stylesheet."
+
+Now, what is a relative path? You could write `href="style.css"` and the content
+of `style.css` would change your `index.html` file. But we want to teach you to
+require external resources (like CSS or JavaScript) by using _relative paths_.
+Relative paths make it _crystal clear_ which file is being used. Relative paths
+start with `./` which means "from the directory I am currently in." So, when we
+use `link` to associate with a style sheet and we write `href="./style.css"`
+we're saying: "From the directory in which I, the `index.html` file live, look
+for a file called `style.css` and use it. This pattern will help you and other
+developers remove any possible confusion.
+
+```html
+<link rel="stylesheet" href="relative path to CSS file" />
 ```
 
-Links to style sheets should go at the end of the `<head>` section! Make sure you
-provide a _relative_ path to the style sheet.
-Hint: Open `index.html` in the browser. You can test whether your link is working or not by the color of your headline. If it's red, it's working! If it's black, keep going - you'll get it.
+Links to style sheets should go at the end of the `<head>` section! Make sure
+you provide a _relative_ path to the style sheet. Hint: Open `index.html` in the
+browser. You can test whether your link is working or not by the color of your
+headline. If it's red, it's working! If it's black, keep going - you'll get it.
 
 ## Implement CSS Declarations
 
 Now, we are going to create some CSS declarations and add styling to our
 document! First, open `index.html` in the browser to get a good idea of what
-[our un-styled page][unstyled] page looks like.
+[our un-styled page][un-styled] page looks like.
 
 What we would really like is [something a little more jazzed up][styled]! Let's
 work towards that. Set the following _properties_ to specific _values_. Make
-sure to, after each update, look at `index.html` in the browser to see how it has
-changed:
+sure to, after each update, look at `index.html` in the browser to see how it
+has changed:
 
-- Set the `background` of the `<body>` element (whole document) to `#00b3e6` (light blue)
+- Set the `background` of the `<body>` element (whole document) to `#00b3e6`
+  (light blue)
 - Set the `<div>` elements:
   - `width` to `700px`
   - `margin` to `auto` (centers our element)
@@ -84,11 +102,11 @@ changed:
   - `background` to `white`
   - `padding` to `30px` (creates an invisible space around the element)
 - Set the element with the id of `#main-header` to a `font-size` of `22px`
-- Set the elements with the class of `.perspective-questions` to a `font-style` of `italic`
-
-Run `learn` to test your work and `learn submit` once you've passed all the
-tests.
+- Set the elements with the class of `.perspective-questions` to a `font-style`
+  of `italic`
 
+Run `npm test` to test your work. Remember to push and submit your work using
+CodeGrade when you're done.
 
 ## Conclusion
 
@@ -97,10 +115,11 @@ follow the 'cascading' rule set. This enables us to keep our HTML clean and
 simple to read, without sacrificing the customization that we have come to
 expect on websites.
 
-
 ## Resources
-- [W3 Introduction to CSS](https://www.w3schools.com/Css/css_intro.asp)
 
-[unstyled]: https://curriculum-content.s3.amazonaws.com/web-development/unstyled-codepen.jpeg
-[styled]: https://curriculum-content.s3.amazonaws.com/web-development/styled-intro-to-css.png
+- [W3 Introduction to CSS](https://www.w3schools.com/Css/css_intro.asp)
 
+[un-styled]:
+  https://curriculum-content.s3.amazonaws.com/web-development/unstyled-codepen.jpeg
+[styled]:
+  https://curriculum-content.s3.amazonaws.com/web-development/styled-intro-to-css.png
diff --git a/index.html b/index.html
index 30ad56b96..a12d76b81 100644
--- a/index.html
+++ b/index.html
@@ -3,7 +3,7 @@
   <head>
     <meta charset="utf-8">
     <title>Introduction to CSS Lab</title>
-    <!-- Your code here! -->
+    <link rel="stylesheet" href="./style.css" />
   </head>
 
   <body>
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 000000000..4c25e7bee
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,3261 @@
+{
+  "name": "phase-0-css-intro-lab",
+  "version": "1.0.0",
+  "lockfileVersion": 2,
+  "requires": true,
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+      "name": "phase-0-css-intro-lab",
+      "version": "1.0.0",
+      "license": "Included in Repo",
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+        "chai-dom": "^1.10.0",
+        "cssom": "^0.5.0",
+        "csstree-validator": "^3.0.0",
+        "global-jsdom": "^8.3.0",
+        "jsdom": "^18.1.0",
+        "mocha": "^9.2.2",
+        "mocha-multi": "^1.1.5"
+      }
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+      "dev": true,
+      "requires": {
+        "isexe": "^2.0.0"
+      }
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+      "dev": true,
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+        "ansi-styles": "^4.0.0",
+        "string-width": "^4.1.0",
+        "strip-ansi": "^6.0.0"
+      }
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+      "dev": true
+    },
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+      "version": "5.0.8",
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+    },
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+      "integrity": "sha512-D1mvvtDG0L5ft/jGWkLpG1+m0eQxOfaBvTNELraWj22wSVUMWxZUvYgJYcKh6jGGIkJFhH4IZPQhR4TKpc8mBw==",
+      "dev": true,
+      "requires": {
+        "cliui": "^7.0.2",
+        "escalade": "^3.1.1",
+        "get-caller-file": "^2.0.5",
+        "require-directory": "^2.1.1",
+        "string-width": "^4.2.0",
+        "y18n": "^5.0.5",
+        "yargs-parser": "^20.2.2"
+      }
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+      "version": "20.2.4",
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+      "dev": true
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+    "yargs-unparser": {
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+      "resolved": "https://registry.npmjs.org/yargs-unparser/-/yargs-unparser-2.0.0.tgz",
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+      "dev": true,
+      "requires": {
+        "camelcase": "^6.0.0",
+        "decamelize": "^4.0.0",
+        "flat": "^5.0.2",
+        "is-plain-obj": "^2.1.0"
+      }
+    },
+    "yocto-queue": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/yocto-queue/-/yocto-queue-0.1.0.tgz",
+      "integrity": "sha512-rVksvsnNCdJ/ohGc6xgPwyN8eheCxsiLM8mxuE/t/mOVqJewPuO1miLpTHQiRgTKCLexL4MeAFVagts7HmNZ2Q==",
+      "dev": true
+    }
+  }
+}
diff --git a/package.json b/package.json
new file mode 100644
index 000000000..dc23aec23
--- /dev/null
+++ b/package.json
@@ -0,0 +1,29 @@
+{
+  "name": "phase-0-css-intro-lab",
+  "version": "1.0.0",
+  "description": "Introduction to CSS Lab",
+  "main": "index.js",
+  "scripts": {
+    "test": "mocha -R mocha-multi --timeout 5000 --reporter-options spec=-,json=.results.json"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/learn-co-curriculum/phase-0-css-intro-lab.git"
+  },
+  "author": "flatironschool",
+  "license": "Included in Repo",
+  "bugs": {
+    "url": "https://github.com/learn-co-curriculum/phase-0-css-intro-lab/issues"
+  },
+  "homepage": "https://github.com/learn-co-curriculum/phase-0-css-intro-lab#readme",
+  "devDependencies": {
+    "chai": "^4.3.4",
+    "chai-dom": "^1.10.0",
+    "cssom": "^0.5.0",
+    "csstree-validator": "^3.0.0",
+    "global-jsdom": "^8.3.0",
+    "jsdom": "^18.1.0",
+    "mocha": "^9.2.2",
+    "mocha-multi": "^1.1.5"
+  }
+}
diff --git a/spec/css_spec.rb b/spec/css_spec.rb
deleted file mode 100644
index 120a37821..000000000
--- a/spec/css_spec.rb
+++ /dev/null
@@ -1,69 +0,0 @@
-require 'w3c_validators'
-include W3CValidators
-
-RSpec.describe 'styling' do
-  context 'syntax' do
-    it 'is valid CSS' do
-      validator = CSSValidator.new
-
-      results = validator.validate_text(File.read('./style.css'))
-      expect(results.validity).to be(true), results.errors.map { |err| "Error on line #{err.line}" }.join(', ')
-      
-    end 
-  end
-
-  context 'within index.html' do
-    
-    it 'contains a <link> tag' do
-      link = parsed_html.search('link')[0]
-      expect(link).to_not be_nil, "No <link> tag was found"
-    end
-    
-    it 'correctly links to the style.css file with a relative path' do
-      link = parsed_html.search('link')[0]
-      expect(link).to_not be_nil, "No <link> tag was found"
-      expect(link.attributes["href"]).to match(/\.\/style\.css/), "Make sure you provide a relative path to style.css from index.html"
-    end
-    
-  end
-  
-  
-  context 'within style.css' do
-    it 'sets body background to #00b3e6' do
-      selector = parsed_css.find_by_selector('body')[0]
-      expect(selector).to (include("background: #00b3e6").or include("background-color: #00b3e6")), "Missing properly formatted background declaration"
-    end
-    it 'sets div width to 700px' do
-      selector = parsed_css.find_by_selector('div')[0]
-      expect(selector).to include("width: 700px;"), "Missing properly formatted width declaration"
-    end
-    it 'sets div margin to auto' do
-      selector = parsed_css.find_by_selector('div')[0]
-      expect(selector).to include("margin: auto;"), "Missing properly formatted margin declaration"
-    end
-    it 'sets div font-family to Helvetica Neue' do
-      selector = parsed_css.find_by_selector('div')[0]
-      expect(selector).to (include('font-family: "Helvetica Neue";').or include('font-family: Helvetica Neue;')), "Missing properly formatted font-family declaration"
-    end
-    it 'sets div background to white' do
-      selector = parsed_css.find_by_selector('div')[0]
-      expect(selector).to include('background: white;'), "Missing properly formatted background declaration"
-    end
-    it 'sets div padding to 30px' do
-      selector = parsed_css.find_by_selector('div')[0]
-      expect(selector).to include('padding: 30px;'), "Missing properly formatted padding declaration"
-    end
-    # 
-    it 'sets #main-header font size to 22px' do
-      selector = parsed_css.find_by_selector('#main-header')[0]
-      expect(selector).to include("font-size: 22px;"), "Missing properly formatted font-size declaration"
-    end
-
-    it 'sets .perspective-questions font style to italic' do
-      selector = parsed_css.find_by_selector('.perspective-questions')[0]
-      expect(selector).to include("font-style: italic"), "Missing properly formatted font-style declaration"
-    end
-  
-  end
-  
-end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
deleted file mode 100644
index ccc426f75..000000000
--- a/spec/spec_helper.rb
+++ /dev/null
@@ -1,98 +0,0 @@
-require 'bundler'
-Bundler.require
-require 'yaml'
-
-# This file was generated by the `rspec --init` command. Conventionally, all
-# specs live under a `spec` directory, which RSpec adds to the `$LOAD_PATH`.
-# The generated `.rspec` file contains `--require spec_helper` which will cause this
-# file to always be loaded, without a need to explicitly require it in any files.
-#
-# Given that it is always loaded, you are encouraged to keep this file as
-# light-weight as possible. Requiring heavyweight dependencies from this file
-# will add to the boot time of your test suite on EVERY test run, even for an
-# individual file that may not need all of that loaded. Instead, make a
-# separate helper file that requires this one and then use it only in the specs
-# that actually need it.
-#
-# The `.rspec` file also contains a few flags that are not defaults but that
-# users commonly want.
-#
-# See http://rubydoc.info/gems/rspec-core/RSpec/Core/Configuration
-RSpec.configure do |config|
-# The settings below are suggested to provide a good initial experience
-# with RSpec, but feel free to customize to your heart's content.
-=begin
-  # These two settings work together to allow you to limit a spec run
-  # to individual examples or groups you care about by tagging them with
-  # `:focus` metadata. When nothing is tagged with `:focus`, all examples
-  # get run.
-  config.filter_run :focus
-  config.run_all_when_everything_filtered = true
-
-  # Many RSpec users commonly either run the entire suite or an individual
-  # file, and it's useful to allow more verbose output when running an
-  # individual spec file.
-  if config.files_to_run.one?
-    # Use the documentation formatter for detailed output,
-    # unless a formatter has already been configured
-    # (e.g. via a command-line flag).
-    config.default_formatter = 'doc'
-  end
-
-  # Print the 10 slowest examples and example groups at the
-  # end of the spec run, to help surface which specs are running
-  # particularly slow.
-  config.profile_examples = 10
-
-  # Run specs in random order to surface order dependencies. If you find an
-  # order dependency and want to debug it, you can fix the order by providing
-  # the seed, which is printed after each run.
-  #     --seed 1234
-  config.order = :random
-
-  # Seed global randomization in this process using the `--seed` CLI option.
-  # Setting this allows you to use `--seed` to deterministically reproduce
-  # test failures related to randomization by passing the same `--seed` value
-  # as the one that triggered the failure.
-  Kernel.srand config.seed
-
-  # rspec-expectations config goes here. You can use an alternate
-  # assertion/expectation library such as wrong or the stdlib/minitest
-  # assertions if you prefer.
-  config.expect_with :rspec do |expectations|
-    # Enable only the newer, non-monkey-patching expect syntax.
-    # For more details, see:
-    #   - http://myronmars.to/n/dev-blog/2012/06/rspecs-new-expectation-syntax
-    expectations.syntax = :expect
-  end
-
-  # rspec-mocks config goes here. You can use an alternate test double
-  # library (such as bogus or mocha) by changing the `mock_with` option here.
-  config.mock_with :rspec do |mocks|
-    # Enable only the newer, non-monkey-patching expect syntax.
-    # For more details, see:
-    #   - http://teaisaweso.me/blog/2013/05/27/rspecs-new-message-expectation-syntax/
-    mocks.syntax = :expect
-
-    # Prevents you from mocking or stubbing a method that does not exist on
-    # a real object. This is generally recommended.
-    mocks.verify_partial_doubles = true
-  end
-=end
-end
-
-def html_file_contents
-  File.read('./index.html')
-end
-
-def parsed_html
-  Nokogiri::HTML(html_file_contents) do |config|
-    config.strict.dtdload.dtdvalid.noblanks
-  end
-end
-
-def parsed_css
-  parser = CssParser::Parser.new
-  parser.load_uri!('./style.css')
-  parser
-end
diff --git a/style.css b/style.css
index 13b7d27e8..33fa14ccb 100644
--- a/style.css
+++ b/style.css
@@ -1,20 +1,25 @@
 /* Tag selector to select the 'body' element */
 body {
-  /* Your code here! */
+  background-color: #00b3e6;
 }
 
 /* Tag selector to select all 'div' elements. We only have one 'div' in our HTML */
 div {
-  /* Your code here! */
+  width: 700px;
+  margin: auto;
+  font-family: "Helvetica Neue";
+  background: white;
+  padding: 30px;
+
 }
 
 /* ID selector to select the element with id 'main-header' */
 #main-header {
-  /* Your code here! */
-  color:red;
+  font-size: 22px;
+  color: red;
 }
 
 /* Class selector to select elements containing the class 'perspective-questions' */
 .perspective-questions {
-  /* Your code here! */
+  font-style: italic;
 }
diff --git a/test/helpers.js b/test/helpers.js
new file mode 100644
index 000000000..debbcc08f
--- /dev/null
+++ b/test/helpers.js
@@ -0,0 +1,10 @@
+const fs = require("fs");
+const path = require("path");
+const globalJsdom = require("global-jsdom");
+
+const html = fs.readFileSync(
+  path.resolve(__dirname, "..", "index.html"),
+  "utf-8"
+);
+
+globalJsdom(html);
diff --git a/test/indexTest.js b/test/indexTest.js
new file mode 100644
index 000000000..75827f0da
--- /dev/null
+++ b/test/indexTest.js
@@ -0,0 +1,132 @@
+require ( './helpers.js' );
+
+const fs = require("fs");
+const path = require("path");
+const chai = require("chai");
+const CSSOM = require("cssom");
+const { validate } = require("csstree-validator");
+chai.use(require("chai-dom"));
+const { expect } = chai;
+
+const cssFile = fs.readFileSync(
+  path.resolve(__dirname, "../style.css"),
+  "utf-8"
+);
+
+function findRule(rules, cssSelector) {
+  return rules.find((r) => r.selectorText === cssSelector);
+}
+
+// Custom CSS Validation Helper
+chai.use(function (chai, utils) {
+  utils.addProperty(chai.Assertion.prototype, "validCss", function () {
+    const validationErrors = validate(this._obj);
+    const errorMessages = validationErrors
+      .map((err) => `	Error on line ${err.line}: ${err.message.trim()}`)
+      .join("");
+    this.assert(
+      validationErrors.length === 0,
+      `Expected CSS not to have validation errors. The following validation errors were reported:
+${errorMessages}`,
+      `Expected CSS to have validation errors. The following validation errors were reported:
+${errorMessages}`
+    );
+  });
+});
+
+describe("index.html", () => {
+  it("contains a <link> tag", () => {
+    const link = document.querySelector("link");
+    const hint = "No <link> tag was found";
+    expect(link, hint).to.exist;
+  });
+
+  it("correctly links to the style.css file with a relative path", () => {
+    const link = document.querySelector("link");
+    const hint1 =
+      "Make sure you provide a rel attribute to identify the link as a stylesheet";
+    expect(link, hint1).to.have.attribute("rel", "stylesheet");
+    const hint2 =
+      "Make sure you provide a relative path to style.css from index.html";
+    expect(link, hint2).to.have.attribute("href", "./style.css");
+  });
+});
+
+describe("index.css", () => {
+  let css;
+  before(() => {
+    css = CSSOM.parse(cssFile);
+  });
+
+  it("contains valid CSS", () => {
+    expect(cssFile).to.be.validCss;
+  });
+
+  it("has a rule for the <body> tag", () => {
+    const rule = findRule(css.cssRules, "body");
+    expect(rule, "Missing body rule").to.exist;
+  });
+
+  it("sets <body> background to #00b3e6", () => {
+    const rule = findRule(css.cssRules, "body");
+    const hint = "Missing background property for body";
+    expect(rule.style["background"]|| rule.style["background-color"], hint).to.eq("#00b3e6");
+  });
+
+  it("has a rule for <div> tags", () => {
+    const rule = findRule(css.cssRules, "div");
+    expect(rule, "Missing div rule").to.exist;
+  });
+
+  it("sets <div> width to 700px", () => {
+    const rule = findRule(css.cssRules, "div");
+    const hint = "Missing width property for div";
+    expect(rule.style["width"], hint).to.eq("700px");
+  });
+
+  it("sets <div> margin to auto", () => {
+    const rule = findRule(css.cssRules, "div");
+    const hint = "Missing margin property for div";
+    expect(rule.style["margin"], hint).to.eq("auto");
+  });
+
+  it("sets <div> font-family to 'Helvetica Neue'", () => {
+    const rule = findRule(css.cssRules, "div");
+    const hint = "Missing font-family property for div";
+    expect(rule.style["font-family"], hint).to.contain("Helvetica Neue");
+  });
+
+  it("sets <div> background to white", () => {
+    const rule = findRule(css.cssRules, "div");
+    const hint = "Missing background property for div";
+    expect(rule.style["background"]|| rule.style["background-color"], hint).to.eq("white");
+  });
+
+  it("sets <div> padding to 30px", () => {
+    const rule = findRule(css.cssRules, "div");
+    const hint = "Missing padding property for div";
+    expect(rule.style["padding"], hint).to.eq("30px");
+  });
+
+  it("has a rule for elements with an id of main-header", () => {
+    const rule = findRule(css.cssRules, "#main-header");
+    expect(rule, "Missing #main-header rule").to.exist;
+  });
+
+  it("sets #main-header font-size to 22px", () => {
+    const rule = findRule(css.cssRules, "#main-header");
+    const hint = "Missing font-size property for #main-header";
+    expect(rule.style["font-size"], hint).to.eq("22px");
+  });
+
+  it("has a rule for elements with a class of perspective-questions", () => {
+    const rule = findRule(css.cssRules, ".perspective-questions");
+    expect(rule, "Missing .perspective-questions rule").to.exist;
+  });
+
+  it("sets .perspective-questions font-style to italic", () => {
+    const rule = findRule(css.cssRules, ".perspective-questions");
+    const hint = "Missing font-style property for .perspective-questions";
+    expect(rule.style["font-style"], hint).to.eq("italic");
+  });
+});