diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index b973f12d8..a64cdaff0 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -3,34 +3,96 @@ name: Tests
 on:
   push:
     branches:
-      - 1.0
-      - 1.1
-      - 1.2
+      - '1.2'
       - develop
   pull_request:
 
 jobs:
   frontendTests:
-    runs-on: ubuntu-latest
-    name: JavaScript
+    strategy:
+      max-parallel: 2
+      matrix:
+        operatingSystem: [ubuntu-latest, windows-latest]
+      fail-fast: false
+    runs-on: ${{ matrix.operatingSystem }}
+    name: ${{ matrix.operatingSystem }} / JavaScript
+    env:
+      nodeVersion: 16
+      phpVersion: '8.0'
+      extensions: curl, fileinfo, gd, mbstring, openssl, pdo, pdo_sqlite, sqlite3, xml, zip
+      key: winter-cms-cache-develop
     steps:
-      - name: Checkout changes
-        uses: actions/checkout@v2
+      - name: Cancel previous incomplete runs
+        uses: styfle/cancel-workflow-action@0.8.0
         with:
-            fetch-depth: 0
+          access_token: ${{ github.token }}
+
+      - name: Checkout changes
+        uses: actions/checkout@v3
+
+      - name: Setup extension cache
+        id: extcache
+        uses: shivammathur/cache-extensions@v1
+        with:
+          php-version: ${{ env.phpVersion }}
+          extensions: ${{ env.extensions }}
+          key: ${{ env.key }}
+
+      - name: Cache extensions
+        uses: actions/cache@v3
+        with:
+          path: ${{ steps.extcache.outputs.dir }}
+          key: ${{ steps.extcache.outputs.key }}
+          restore-keys: ${{ steps.extcache.outputs.key }}
+
+      - name: Install PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ env.phpVersion }}
+          extensions: ${{ env.extensions }}
 
       - name: Install Node
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v3
         with:
-            node-version: 12
+          node-version: ${{ env.nodeVersion }}
 
-      - name: Install Node dependencies
-        working-directory: ./modules/system/tests/js
-        run: npm install
+      - name: Echo branches
+        run: echo "${{ github.ref }} | ${{ github.head_ref }} | ${{ github.ref_name }} | ${{ github.base_ref }}"
+
+      - name: Switch library dependency (develop)
+        if: github.ref == 'refs/heads/develop' || github.base_ref == 'develop'
+        run: php ./.github/workflows/utilities/library-switcher "dev-develop as 1.2"
+
+      - name: Switch library dependency (1.2)
+        if: github.head_ref == '1.2' || github.ref == 'refs/heads/1.2' || github.base_ref == '1.2'
+        run: php ./.github/workflows/utilities/library-switcher "1.2.x-dev as 1.2"
+
+      - name: Setup dependency cache
+        id: composercache
+        run: echo "::set-output name=dir::$(composer config cache-files-dir)"
+
+      - name: Cache dependencies
+        uses: actions/cache@v3
+        with:
+          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-scripts
+
+      - name: Reset modules
+        run: |
+          git reset --hard
+          git clean -fd
+
+      - name: Run post-update Composer scripts
+        run: php artisan package:discover
 
       - name: Run tests
-        working-directory: ./modules/system/tests/js
-        run: npm run test
+        run: |
+          php artisan mix:install
+          php artisan mix:run module-system test
 
   phpUnitTests:
     strategy:
@@ -108,7 +170,9 @@ jobs:
         run: composer install --no-interaction --no-progress --no-scripts
 
       - name: Reset modules
-        run: git reset --hard
+        run: |
+          git reset --hard
+          git clean -fd
 
       - name: Run post-update Composer scripts
         run: php artisan package:discover
diff --git a/modules/system/tests/js/.babelrc b/modules/system/.babelrc
similarity index 89%
rename from modules/system/tests/js/.babelrc
rename to modules/system/.babelrc
index 710cfd1b1..d6a9403c2 100644
--- a/modules/system/tests/js/.babelrc
+++ b/modules/system/.babelrc
@@ -6,7 +6,7 @@
         "@babel/plugin-transform-runtime",
         [
             "module-resolver", {
-                "root": ["."],
+                "root": ["./tests/js"],
                 "alias": {
                     "helpers": "./helpers",
                     "snowboard": "../../modules/system/assets/js/snowboard",
diff --git a/modules/system/ServiceProvider.php b/modules/system/ServiceProvider.php
index e51ba5dd2..f7d3bfb6d 100644
--- a/modules/system/ServiceProvider.php
+++ b/modules/system/ServiceProvider.php
@@ -274,6 +274,7 @@ class ServiceProvider extends ModuleServiceProvider
         $this->registerConsoleCommand('mix.list', \System\Console\MixList::class);
         $this->registerConsoleCommand('mix.compile', \System\Console\MixCompile::class);
         $this->registerConsoleCommand('mix.watch', \System\Console\MixWatch::class);
+        $this->registerConsoleCommand('mix.run', \System\Console\MixRun::class);
     }
 
     /*
diff --git a/modules/system/console/MixRun.php b/modules/system/console/MixRun.php
new file mode 100644
index 000000000..424cea57e
--- /dev/null
+++ b/modules/system/console/MixRun.php
@@ -0,0 +1,102 @@
+<?php namespace System\Console;
+
+use File;
+use Symfony\Component\Process\Process;
+use System\Classes\MixAssets;
+use Winter\Storm\Console\Command;
+
+class MixRun extends Command
+{
+    /**
+     * @var string|null The default command name for lazy loading.
+     */
+    protected static $defaultName = 'mix:run';
+
+    /**
+     * @var string The name and signature of this command.
+     */
+    protected $signature = 'mix:run
+        {package : Defines the package where the script is located.}
+        {script : The name of the script to run, as defined in the package.json "scripts" config.}
+        {additionalArgs?* : Arguments to pass through to the script being run.}
+        {--f|production : Runs the script in "production" mode.}
+        {--s|silent : Silent mode.}';
+
+    /**
+     * @var string The console command description.
+     */
+    protected $description = 'Runs a script in a given package.';
+
+    /**
+     * Execute the console command.
+     */
+    public function handle(): int
+    {
+        $mixedAssets = MixAssets::instance();
+        $mixedAssets->fireCallbacks();
+
+        $packages = $mixedAssets->getPackages();
+        $name = $this->argument('package');
+        $script = $this->argument('script');
+
+        if (!in_array($name, array_keys($packages))) {
+            $this->error(
+                sprintf('Package "%s" is not a registered package.', $name)
+            );
+            return 1;
+        }
+
+        $package = $packages[$name];
+        $packageJson = $this->readPackageJson($package);
+
+        if (!isset($packageJson['scripts'][$script])) {
+            $this->error(
+                sprintf('Script "%s" is not defined in package "%s".', $script, $name)
+            );
+            return 1;
+        }
+
+        $this->info(sprintf('Running script "%s" in package "%s"', $script, $name));
+
+        $command = ($this->argument('additionalArgs')) ?? [];
+        if (count($command)) {
+            array_unshift($command, 'npm', 'run', $script, '--');
+        } else {
+            array_unshift($command, 'npm', 'run', $script);
+        }
+
+
+        $process = new Process(
+            $command,
+            base_path($package['path']),
+            ['NODE_ENV' => $this->option('production', false) ? 'production' : 'development'],
+            null,
+            null
+        );
+
+        try {
+            $process->setTty(true);
+        } catch (\Throwable $e) {
+            // This will fail on unsupported systems
+        }
+
+        $exitCode = $process->run(function ($status, $stdout) {
+            if (!$this->option('silent')) {
+                $this->getOutput()->write($stdout);
+            }
+        });
+
+        return $exitCode;
+    }
+
+    /**
+     * Reads the package.json file for the given package.
+     */
+    protected function readPackageJson(array $package): array
+    {
+        $packageJsonPath = base_path($package['package']);
+        return File::exists($packageJsonPath)
+            ? json_decode(File::get($packageJsonPath), true)
+            : [];
+    }
+}
diff --git a/modules/system/package.json b/modules/system/package.json
index 733390bb3..c136c0422 100644
--- a/modules/system/package.json
+++ b/modules/system/package.json
@@ -23,15 +23,25 @@
         "url": "https://github.com/wintercms/winter/issues"
     },
     "homepage": "https://wintercms.com/",
+    "scripts": {
+        "test": "jest --config tests/js/jest.config.js tests/js/cases"
+    },
     "dependencies": {
         "js-cookie": "^3.0.1"
     },
     "devDependencies": {
+        "@babel/core": "^7.16.0",
+        "@babel/plugin-transform-runtime": "^7.16.4",
+        "@babel/preset-env": "^7.16.4",
+        "@babel/register": "^7.16.0",
+        "@babel/runtime": "^7.16.3",
         "babel-plugin-module-resolver": "^4.1.0",
         "eslint": "^8.6.0",
         "eslint-config-airbnb-base": "^15.0.0",
         "eslint-plugin-import": "^2.25.4",
         "eslint-plugin-vue": "^8.5.0",
+        "jest": "^27.4.3",
+        "jsdom": "^18.1.1",
         "laravel-mix": "^6.0.34",
         "laravel-mix-polyfill": "^3.0.1"
     }
diff --git a/modules/system/tests/js/.gitignore b/modules/system/tests/js/.gitignore
deleted file mode 100644
index 7f9265d1a..000000000
--- a/modules/system/tests/js/.gitignore
+++ /dev/null
@@ -1,3 +0,0 @@
-# Ignore packages
-package-lock.json
-node_modules
diff --git a/modules/system/tests/js/README.md b/modules/system/tests/js/README.md
deleted file mode 100644
index 790325257..000000000
--- a/modules/system/tests/js/README.md
+++ /dev/null
@@ -1,32 +0,0 @@
-# Snowboard Framework Testing Suite
-
-The files in this directory form the testing suite for the new Winter JavaScript framework - Snowboard. You must install
-all Node dependencies in order to run the testing suite:
-
-```bash
-cd tests/js
-npm install
-```
-
-You can then run the tests by using the following command:
-
-```bash
-npm run test
-```
-
-Please note that the tests are run against the "built" versions of Snowboard and its plugins, in order to test
-the exact same functionality that would be delivered to the end user. We do this by leveraging the `JSDOM` library to
-simulate an entire HTML document.
-
-Therefore, you must compile a new build if you make any changes and wish to run the tests:
-
-```bash
-php artisan mix:compile --package snowboard
-```
-
-You can also watch the framework for any changes, which will automatically run a build after a change is made. This will
-make development and testing in parallel much quicker:
-
-```bash
-php artisan mix:watch snowboard
-```
diff --git a/modules/system/tests/js/package.json b/modules/system/tests/js/package.json
deleted file mode 100644
index 650f38698..000000000
--- a/modules/system/tests/js/package.json
+++ /dev/null
@@ -1,37 +0,0 @@
-{
-    "name": "@wintercms/tests",
-    "description": "Test cases for the Winter JavaScript framework",
-    "private": true,
-    "scripts": {
-        "test": "jest"
-    },
-    "repository": {
-        "type": "git",
-        "url": "git+https://github.com/wintercms/winter.git"
-    },
-    "contributors": [
-        {
-            "name": "Ben Thomson",
-            "email": "git@alfreido.com"
-        },
-        {
-            "name": "Winter CMS Maintainers",
-            "url": "https://wintercms.com/"
-        }
-    ],
-    "license": "MIT",
-    "bugs": {
-        "url": "https://github.com/wintercms/winter/issues"
-    },
-    "homepage": "https://wintercms.com/",
-    "devDependencies": {
-        "@babel/core": "^7.16.0",
-        "@babel/plugin-transform-runtime": "^7.16.4",
-        "@babel/preset-env": "^7.16.4",
-        "@babel/register": "^7.16.0",
-        "@babel/runtime": "^7.16.3",
-        "babel-plugin-module-resolver": "^4.1.0",
-        "jest": "^27.4.3",
-        "jsdom": "^18.1.1"
-    }
-}