diff --git a/.github/workflows/code-quality-pr.yaml b/.github/workflows/code-quality-pr.yaml
index af05451d1..a63b5013b 100644
--- a/.github/workflows/code-quality-pr.yaml
+++ b/.github/workflows/code-quality-pr.yaml
@@ -6,18 +6,16 @@ on:
 jobs:
   codeQuality:
     runs-on: ubuntu-latest
-    name: PHPCS
+    name: PHP
     steps:
       - name: Checkout changes
-        uses: actions/checkout@v1
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
       - name: Install PHP and PHP Code Sniffer
-        uses: shivammathur/setup-php@v1
+        uses: shivammathur/setup-php@v2
         with:
           php-version: '7.3'
           tools: phpcs
-      - name: Setup problem matcher for PHPCS
-        run: echo "::add-matcher::${{ github.workspace }}/.github/workflows/matchers/phpcs-matcher.json"
       - name: Run code quality checks
-        run: |
-          git config remote.origin.fetch "+refs/heads/*:refs/remotes/origin/*" && git fetch
-          phpcs --colors -nq --report="checkstyle" --extensions="php" $(git diff --name-only --diff-filter=ACMR origin/${{ github.base_ref }} HEAD)
+        run: ./.github/workflows/utilities/phpcs-pr ${{ github.base_ref }}
diff --git a/.github/workflows/code-quality-push.yaml b/.github/workflows/code-quality-push.yaml
index ff209d0b5..f34f7b3b8 100644
--- a/.github/workflows/code-quality-push.yaml
+++ b/.github/workflows/code-quality-push.yaml
@@ -9,16 +9,16 @@ on:
 jobs:
   codeQuality:
     runs-on: ubuntu-latest
-    name: PHPCS
+    name: PHP
     steps:
       - name: Checkout changes
-        uses: actions/checkout@v1
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
       - name: Install PHP and PHP Code Sniffer
-        uses: shivammathur/setup-php@v1
+        uses: shivammathur/setup-php@v2
         with:
           php-version: '7.3'
           tools: phpcs
-      - name: Setup problem matcher for PHPCS
-        run: echo "::add-matcher::${{ github.workspace }}/.github/workflows/matchers/phpcs-matcher.json"
       - name: Run code quality checks
-        run: phpcs --colors -nq --report="checkstyle" --extensions="php" $(git show --name-only --pretty="" --diff-filter=ACMR ${{ github.sha }})
+        run: ./.github/workflows/utilities/phpcs-push ${{ github.sha }}
diff --git a/.github/workflows/matchers/phpcs-matcher.json b/.github/workflows/matchers/phpcs-matcher.json
deleted file mode 100644
index 5c80b26d2..000000000
--- a/.github/workflows/matchers/phpcs-matcher.json
+++ /dev/null
@@ -1,23 +0,0 @@
-{
-    "problemMatcher": [
-      {
-        "owner": "phpcs",
-        "severity": "error",
-        "pattern": [
-          {
-            "regexp": "^<file name=\"(.*)\">$",
-            "file": 1
-          },
-          {
-            "regexp": "<error line=\"(\\d*)\" column=\"(\\d*)\" severity=\"(error|warning)\" message=\"(.*)\" source=\"(.*)(\"\\/>+)$",
-            "line": 1,
-            "column": 2,
-            "severity": 3,
-            "message": 4,
-            "code": 5,
-            "loop": true
-          }
-        ]
-      }
-    ]
-  }
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index a27246d97..efbd9a2e3 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -13,51 +13,83 @@ jobs:
     name: JavaScript
     steps:
       - name: Checkout changes
-        uses: actions/checkout@v1
+        uses: actions/checkout@v2
+        with:
+            fetch-depth: 0
+
       - name: Install Node
         uses: actions/setup-node@v1
         with:
-            node-version: 8
+            node-version: 12
+
       - name: Install Node dependencies
         run: npm install
+
       - name: Run tests
         run: npm run test
   phpUnitTests:
-    runs-on: ubuntu-latest
     strategy:
       max-parallel: 6
       matrix:
-        phpVersions: ['7.2', '7.3', '7.4']
+        operatingSystem: [ubuntu-latest, windows-latest]
+        phpVersion: ['7.2', '7.3', '7.4']
       fail-fast: false
-    name: Unit Tests / PHP ${{ matrix.phpVersions }}
+    runs-on: ${{ matrix.operatingSystem }}
+    name: ${{ matrix.operatingSystem }} / PHP ${{ matrix.phpVersion }}
+    env:
+      extensions: curl, fileinfo, gd, mbstring, openssl, pdo, pdo_sqlite, sqlite3, xml
+      key: october-cms-cache-v1
     steps:
       - name: Checkout changes
-        uses: actions/checkout@v1
+        uses: actions/checkout@v2
+
+      - name: Setup extension cache
+        id: extcache
+        uses: shivammathur/cache-extensions@v1
+        with:
+          php-version: ${{ matrix.phpVersion }}
+          extensions: ${{ env.extensions }}
+          key: ${{ env.key }}
+
+      - name: Cache extensions
+        uses: actions/cache@v2
+        with:
+          path: ${{ steps.extcache.outputs.dir }}
+          key: ${{ steps.extcache.outputs.key }}
+          restore-keys: ${{ steps.extcache.outputs.key }}
+
       - name: Install PHP
-        uses: shivammathur/setup-php@v1
+        uses: shivammathur/setup-php@v2
         with:
-          php-version: ${{ matrix.phpVersions }}
-          extensions: mbstring, intl, gd, xml, sqlite
-      - name: Setup problem matchers for PHPUnit
-        run: echo "::add-matcher::${{ runner.tool_cache }}/phpunit.json"
-      - name: Set Composer cache
-        id: composer-cache
+          php-version: ${{ matrix.phpVersion }}
+          tools: composer
+          extensions: ${{ env.extensions }}
+
+      - name: Setup dependency cache
+        id: composercache
         run: echo "::set-output name=dir::$(composer config cache-files-dir)"
-      - name: Cache Composer dependencies
-        uses: actions/cache@v1
+
+      - name: Cache dependencies
+        uses: actions/cache@v2
         with:
-          path: ${{ steps.composer-cache.outputs.dir }}
+          path: ${{ steps.composercache.outputs.dir }}
           key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}
           restore-keys: ${{ runner.os }}-composer-
+
       - name: Install Composer dependencies
-        run: composer install --no-interaction --no-progress --no-suggest --no-scripts
+        run: composer install --no-interaction --no-progress --no-suggest
+
       - name: Run post-update Composer scripts
         run: php artisan package:discover
+
       - name: Reset October modules
         run: |
           git reset --hard HEAD
           composer dumpautoload
-      - name: Run Linting and Tests
-        run: |
-          ./vendor/bin/parallel-lint --exclude vendor --exclude storage --exclude tests/fixtures/plugins/testvendor/goto/Plugin.php .
-          ./vendor/bin/phpunit --prepend ./vendor/october/rain/src/Support/helpers.php
+
+      - name: Setup problem matchers for PHPUnit
+        if: matrix.phpVersion == '7.4'
+        run: echo "::add-matcher::${{ runner.tool_cache }}/phpunit.json"
+
+      - name: Run tests
+        run: ./vendor/bin/phpunit --prepend ./vendor/october/rain/src/Support/helpers.php
diff --git a/.github/workflows/utilities/phpcs-pr b/.github/workflows/utilities/phpcs-pr
new file mode 100755
index 000000000..48304acc3
--- /dev/null
+++ b/.github/workflows/utilities/phpcs-pr
@@ -0,0 +1,77 @@
+#!/usr/bin/env php
+<?php
+if (empty($argv[1])) {
+    echo 'You must provide a base branch to check this PR against.';
+    echo "\n";
+    exit(1);
+}
+
+// Get a changelist of files from Git for this PR.
+$fileList = shell_exec('git diff --name-only --diff-filter=ACMR origin/' . $argv[1] . ' HEAD');
+$files = array_filter(explode("\n", $fileList));
+
+foreach ($files as &$file) {
+    if (strpos($file, ' ') !== false) {
+        $file = str_replace(' ', '\\ ', $file);
+    }
+}
+
+// Run all changed files through the PHPCS code sniffer and generate a CSV report
+$csv = shell_exec('phpcs --colors -nq --report="csv" --extensions="php" ' . implode(' ', $files));
+$lines = array_map(function ($row) {
+    return array_map(function ($column) {
+        return trim($column, '"');
+    }, explode(',', $row));
+}, array_filter(explode("\n", $csv)));
+
+// Remove header row
+array_shift($lines);
+
+if (!count($lines)) {
+    echo "\e[0;32mFound no issues with code quality.\e[0m";
+    echo "\n";
+    exit(0);
+} else {
+    // Group errors by file
+    $files = [];
+
+    foreach ($lines as $line) {
+        $filename = str_replace(dirname(dirname(dirname(__DIR__))), '', $line[0]);
+
+        if (empty($files[$filename])) {
+            $files[$filename] = [];
+        }
+
+        $files[$filename][] = [
+            'warning' => ($line[3] === 'warning'),
+            'message' => $line[4],
+            'line' => $line[1],
+        ];
+    }
+
+    // Render report
+    echo "\e[0;31mFound "
+        . ((count($lines) === 1)
+            ? '1 issue'
+            : count($lines) . ' issues')
+        . " with code quality.\e[0m";
+    echo "\n";
+
+    foreach ($files as $file => $errors) {
+        echo "\n";
+        echo "\e[1;37m" . str_replace('"', '', $file) . "\e[0m";
+        echo "\n\n";
+
+        foreach ($errors as $error) {
+            echo "\e[2m" . str_pad('  L' . $error['line'], 7) . " | \e[0m";
+            if ($error['warning'] === false) {
+                echo "\e[0;31mERR:\e[0m  ";
+            } else {
+                echo "\e[1;33mWARN:\e[0m ";
+            }
+            echo $error['message'];
+            echo "\n";
+        }
+    }
+    exit(1);
+}
diff --git a/.github/workflows/utilities/phpcs-push b/.github/workflows/utilities/phpcs-push
new file mode 100755
index 000000000..08c9d7fb5
--- /dev/null
+++ b/.github/workflows/utilities/phpcs-push
@@ -0,0 +1,77 @@
+#!/usr/bin/env php
+<?php
+if (empty($argv[1])) {
+    echo 'You must provide a commit SHA to check.';
+    echo "\n";
+    exit(1);
+}
+
+// Get a changelist of files from Git for this push.
+$fileList = shell_exec('git show --name-only --pretty="" --diff-filter=ACMR ' . $argv[1]);
+$files = array_filter(explode("\n", $fileList));
+
+foreach ($files as &$file) {
+    if (strpos($file, ' ') !== false) {
+        $file = str_replace(' ', '\\ ', $file);
+    }
+}
+
+// Run all changed files through the PHPCS code sniffer and generate a CSV report
+$csv = shell_exec('phpcs --colors -nq --report="csv" --extensions="php" ' . implode(' ', $files));
+$lines = array_map(function ($row) {
+    return array_map(function ($column) {
+        return trim($column, '"');
+    }, explode(',', $row));
+}, array_filter(explode("\n", $csv)));
+
+// Remove header row
+array_shift($lines);
+
+if (!count($lines)) {
+    echo "\e[0;32mFound no issues with code quality.\e[0m";
+    echo "\n";
+    exit(0);
+} else {
+    // Group errors by file
+    $files = [];
+
+    foreach ($lines as $line) {
+        $filename = str_replace(dirname(dirname(dirname(__DIR__))), '', $line[0]);
+
+        if (empty($files[$filename])) {
+            $files[$filename] = [];
+        }
+
+        $files[$filename][] = [
+            'warning' => ($line[3] === 'warning'),
+            'message' => $line[4],
+            'line' => $line[1],
+        ];
+    }
+
+    // Render report
+    echo "\e[0;31mFound "
+        . ((count($lines) === 1)
+            ? '1 issue'
+            : count($lines) . ' issues')
+        . " with code quality.\e[0m";
+    echo "\n";
+
+    foreach ($files as $file => $errors) {
+        echo "\n";
+        echo "\e[1;37m" . str_replace('"', '', $file) . "\e[0m";
+        echo "\n\n";
+
+        foreach ($errors as $error) {
+            echo "\e[2m" . str_pad('  L' . $error['line'], 7) . " | \e[0m";
+            if ($error['warning'] === false) {
+                echo "\e[0;31mERR:\e[0m  ";
+            } else {
+                echo "\e[1;33mWARN:\e[0m ";
+            }
+            echo $error['message'];
+            echo "\n";
+        }
+    }
+    exit(1);
+}
diff --git a/modules/backend/helpers/Backend.php b/modules/backend/helpers/Backend.php
index 18671e94e..de9cae563 100644
--- a/modules/backend/helpers/Backend.php
+++ b/modules/backend/helpers/Backend.php
@@ -214,14 +214,14 @@ class Backend
         $contents = file_get_contents($assetFile);
 
         // Find all assets that are compiled in this file
-        preg_match_all('/^=require\s+([A-z0-9-_+\.\/]+)$/m', $contents, $matches, PREG_SET_ORDER);
+        preg_match_all('/^=require\s+([A-z0-9-_+\.\/]+)[\n|\r\n|$]/m', $contents, $matches, PREG_SET_ORDER);
 
         // Determine correct asset path
         $directory = str_replace(basename($file), '', $file);
 
         if (count($matches)) {
             $results = array_map(function ($match) use ($directory) {
-                return $directory . $match[1];
+                return str_replace('/', DIRECTORY_SEPARATOR, $directory . $match[1]);
             }, $matches);
 
             foreach ($results as $i => $result) {
diff --git a/modules/cms/classes/CodeParser.php b/modules/cms/classes/CodeParser.php
index b747a20e5..2d1d8ab13 100644
--- a/modules/cms/classes/CodeParser.php
+++ b/modules/cms/classes/CodeParser.php
@@ -129,7 +129,7 @@ class CodeParser
         $body = preg_replace('/^\s*function/m', 'public function', $body);
 
         $namespaces = [];
-        $pattern = '/(use\s+[a-z0-9_\\\\]+(\s+as\s+[a-z0-9_]+)?;\n?)/mi';
+        $pattern = '/(use\s+[a-z0-9_\\\\]+(\s+as\s+[a-z0-9_]+)?;(\r\n|\n)?)/mi';
         preg_match_all($pattern, $body, $namespaces);
         $body = preg_replace($pattern, '', $body);
 
@@ -142,13 +142,13 @@ class CodeParser
 
         foreach ($namespaces[0] as $namespace) {
             if (str_contains($namespace, '\\')) {
-                $fileContents .= $namespace;
+                $fileContents .= trim($namespace).PHP_EOL;
             }
         }
 
         $fileContents .= 'class '.$className.$parentClass.PHP_EOL;
         $fileContents .= '{'.PHP_EOL;
-        $fileContents .= $body.PHP_EOL;
+        $fileContents .= trim($body).PHP_EOL;
         $fileContents .= '}'.PHP_EOL;
 
         $this->validate($fileContents);
diff --git a/tests/unit/cms/classes/AssetTest.php b/tests/unit/cms/classes/AssetTest.php
index 13519a161..7325d473e 100644
--- a/tests/unit/cms/classes/AssetTest.php
+++ b/tests/unit/cms/classes/AssetTest.php
@@ -61,47 +61,47 @@ class AssetTest extends TestCase
 
         // Direct paths
         $this->assertEquals(
-            $themeDir . '/assets/js/script1.js',
+            str_replace('/', DIRECTORY_SEPARATOR, $themeDir . '/assets/js/script1.js'),
             $assetClass->getFilePath('js/script1.js')
         );
         $this->assertEquals(
-            $themeDir . '/assets/js/script1.js',
+            str_replace('/', DIRECTORY_SEPARATOR, $themeDir . '/assets/js/script1.js'),
             $assetClass->getFilePath('/js/script1.js')
         );
 
         // Direct path to a directory
         $this->assertEquals(
-            $themeDir . '/assets/js/subdir',
+            str_replace('/', DIRECTORY_SEPARATOR, $themeDir . '/assets/js/subdir'),
             $assetClass->getFilePath('/js/subdir')
         );
         $this->assertEquals(
-            $themeDir . '/assets/js/subdir',
+            str_replace('/', DIRECTORY_SEPARATOR, $themeDir . '/assets/js/subdir'),
             $assetClass->getFilePath('/js/subdir/')
         );
 
         // Relative paths
         $this->assertEquals(
-            $themeDir . '/assets/js/script2.js',
+            str_replace('/', DIRECTORY_SEPARATOR, $themeDir . '/assets/js/script2.js'),
             $assetClass->getFilePath('./js/script2.js')
         );
         $this->assertEquals(
-            $themeDir . '/assets/js/script2.js',
+            str_replace('/', DIRECTORY_SEPARATOR, $themeDir . '/assets/js/script2.js'),
             $assetClass->getFilePath('/js/subdir/../script2.js')
         );
 
         // Missing file, but valid directory (allows for new files)
         $this->assertEquals(
-            $themeDir . '/assets/js/missing.js',
+            str_replace('/', DIRECTORY_SEPARATOR, $themeDir . '/assets/js/missing.js'),
             $assetClass->getFilePath('/js/missing.js')
         );
         $this->assertEquals(
-            $themeDir . '/assets/js/missing.js',
+            str_replace('/', DIRECTORY_SEPARATOR, $themeDir . '/assets/js/missing.js'),
             $assetClass->getFilePath('js/missing.js')
         );
 
         // Missing file and missing directory (new directories are created as needed)
         $this->assertEquals(
-            $themeDir . '/assets/js/missing/missing.js',
+            str_replace('/', DIRECTORY_SEPARATOR, $themeDir . '/assets/js/missing/missing.js'),
             $assetClass->getFilePath('/js/missing/missing.js')
         );
 
diff --git a/tests/unit/cms/classes/CmsObjectTest.php b/tests/unit/cms/classes/CmsObjectTest.php
index 2c65761b4..895825b5c 100644
--- a/tests/unit/cms/classes/CmsObjectTest.php
+++ b/tests/unit/cms/classes/CmsObjectTest.php
@@ -23,7 +23,7 @@ class CmsObjectTest extends TestCase
         $this->assertEquals('<p>This is a test HTML content file.</p>', $obj->getContent());
         $this->assertEquals('plain.html', $obj->getFileName());
 
-        $path = $theme->getPath().'/testobjects/plain.html';
+        $path = str_replace('/', DIRECTORY_SEPARATOR, $theme->getPath().'/testobjects/plain.html');
         $this->assertEquals($path, $obj->getFilePath());
         $this->assertEquals(filemtime($path), $obj->mtime);
     }
@@ -36,7 +36,7 @@ class CmsObjectTest extends TestCase
         $this->assertEquals('<p>This is an object in a subdirectory.</p>', $obj->getContent());
         $this->assertEquals('subdir/obj.html', $obj->getFileName());
 
-        $path = $theme->getPath().'/testobjects/subdir/obj.html';
+        $path = str_replace('/', DIRECTORY_SEPARATOR, $theme->getPath().'/testobjects/subdir/obj.html');
         $this->assertEquals($path, $obj->getFilePath());
         $this->assertEquals(filemtime($path), $obj->mtime);
     }
diff --git a/tests/unit/cms/classes/ControllerTest.php b/tests/unit/cms/classes/ControllerTest.php
index 1496055a3..c7860c4a1 100644
--- a/tests/unit/cms/classes/ControllerTest.php
+++ b/tests/unit/cms/classes/ControllerTest.php
@@ -312,7 +312,7 @@ class ControllerTest extends TestCase
 </div>
 ESC;
 
-        $this->assertEquals($content, $response);
+        $this->assertEquals(str_replace(PHP_EOL, "\n", $content), $response);
         $this->assertEquals(69, $component->property('posts-per-page'));
         $this->assertEquals('Blog Archive Dummy Component', $details['name']);
         $this->assertEquals('Displays an archive of blog posts.', $details['description']);
@@ -342,7 +342,7 @@ ESC;
 </div>
 ESC;
 
-        $this->assertEquals($content, $response);
+        $this->assertEquals(str_replace(PHP_EOL, "\n", $content), $response);
         $this->assertEquals(6, $component->property('posts-per-page'));
         $this->assertEquals(9, $component2->property('posts-per-page'));
     }
@@ -403,7 +403,7 @@ ESC;
 </div>
 ESC;
 
-        $this->assertEquals($content, $response);
+        $this->assertEquals(str_replace(PHP_EOL, "\n", $content), $response);
         $this->assertEquals(69, $component->property('posts-per-page'));
         $this->assertEquals('Blog Archive Dummy Component', $details['name']);
         $this->assertEquals('Displays an archive of blog posts.', $details['description']);
@@ -429,7 +429,7 @@ ESC;
 </div>
 ESC;
 
-        $this->assertEquals($content, $response);
+        $this->assertEquals(str_replace(PHP_EOL, "\n", $content), $response);
         $this->assertEquals(69, $component->property('posts-per-page'));
         $this->assertEquals('Blog Archive Dummy Component', $details['name']);
         $this->assertEquals('Displays an archive of blog posts.', $details['description']);
@@ -523,7 +523,7 @@ ESC;
 <p>Insert post here</p>
 ESC;
 
-        $this->assertEquals($content, $response);
+        $this->assertEquals(str_replace(PHP_EOL, "\n", $content), $response);
     }
 
     public function testComponentWithOnRender()
@@ -537,6 +537,6 @@ Pass
 Custom output: Would you look over Picasso's shoulder
 Custom output: And tell him about his brush strokes?
 ESC;
-        $this->assertEquals($content, $response);
+        $this->assertEquals(str_replace(PHP_EOL, "\n", $content), $response);
     }
 }