diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
index 5a052e5e..03810ee2 100644
--- a/.devcontainer/Dockerfile
+++ b/.devcontainer/Dockerfile
@@ -15,6 +15,7 @@ RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
       mariadb-client \
       vim \
       zip \
+      wget \
     && apt-get -y autoremove && apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* /usr/share/doc/*
 
 # Install PHP extensions
@@ -36,9 +37,9 @@ RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
       pdo \
       pdo_mysql \
       zip \
-    && pecl install imagick-3.7.0 && docker-php-ext-enable imagick \
+    # && pecl install imagick-3.7.0 && docker-php-ext-enable imagick \ # https://github.com/Imagick/imagick/issues/689
     && pecl install -o -f redis && docker-php-ext-enable redis \
-    && pecl install xdebug-3.3.1 && docker-php-ext-enable xdebug \
+    && pecl install xdebug-3.4.0 && docker-php-ext-enable xdebug \
     && apt-get -y autoremove && apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* /usr/share/doc/*
 
 # Install composer
diff --git a/.devcontainer/config/web/default.conf b/.devcontainer/config/web/default.conf
index 08055d68..a9f9a3d5 100644
--- a/.devcontainer/config/web/default.conf
+++ b/.devcontainer/config/web/default.conf
@@ -1,6 +1,8 @@
 server {
   listen 80 default;
   listen [::]:80;
+    listen 8080 default_server;
+    listen [::]:8080 default_server;
 
   # listen 443 ssl;
   # listen [::]:443 ssl ipv6only=on;
@@ -11,7 +13,7 @@ server {
   add_header X-Content-Type-Options "nosniff";
   charset utf-8;
 
-  server_name web.local web;
+  server_name _;
   root /roots/app/public;
   index index.php index.html;
 
diff --git a/.devcontainer/docker-compose.yml b/.devcontainer/docker-compose.yml
index c370c1a2..01d001ca 100644
--- a/.devcontainer/docker-compose.yml
+++ b/.devcontainer/docker-compose.yml
@@ -5,7 +5,7 @@ services:
     build:
       context: .
       dockerfile: Dockerfile
-    image: roots/dev-8.3
+    image: roots/dev-8.4
     extra_hosts:
       - 'host.docker.internal:host-gateway'
     environment:
@@ -29,6 +29,9 @@ services:
     image: nginx:latest
     ports:
       - '${FORWARD_WEB_PORT:-8080}:80'
+
+    expose:
+      - '8080'
     environment:
       - NGINX_ENTRYPOINT_WORKER_PROCESSES_AUTOTUNE=1
     volumes:
diff --git a/.github/workflows/integration.yml b/.github/workflows/integration.yml
new file mode 100644
index 00000000..cdfc6c2f
--- /dev/null
+++ b/.github/workflows/integration.yml
@@ -0,0 +1,40 @@
+name: Integration
+
+on: [push, pull_request, workflow_dispatch]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Copy .env file
+        working-directory: .devcontainer
+        run: cp config/app/.env.example .env
+
+      - name: Start dev container and test
+        uses: devcontainers/ci@v0.3
+        with:
+          configFile: .devcontainer/devcontainer.json
+          runCmd: |
+            cd /roots/app
+            composer install
+            # ???
+            composer remove roots/acorn
+            composer require roots/acorn --no-interaction
+            composer require --dev nunomaduro/collision
+            composer require --dev spatie/laravel-ignition
+            # ???
+            while ! mysqladmin ping -h"database" --silent; do
+              sleep 1
+            done
+            wp core install --url=http://web:8080 --title=Acorn --admin_user=admin --admin_password=admin --admin_email=admin@example.com --skip-email --allow-root
+            wp acorn optimize:clear
+
+            cd /roots/acorn
+            composer install
+            composer run-script test tests/Integration/Routing
+
+      - name: Verify routes
+        run: |
+          curl -s http://localhost:8080/test/ | grep "Howdy"
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index fb326f9c..27ae9b13 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -47,4 +47,4 @@ jobs:
         run: composer run-script lint
 
       - name: Execute the Composer test script
-        run: composer run-script test
+        run: composer test -- --exclude-group=integration
diff --git a/tests/Integration/Routing/RoutingTest.php b/tests/Integration/Routing/RoutingTest.php
new file mode 100644
index 00000000..cbbd915c
--- /dev/null
+++ b/tests/Integration/Routing/RoutingTest.php
@@ -0,0 +1,81 @@
+<?php
+
+namespace Roots\Acorn\Tests\Integration\Routing;
+
+use GuzzleHttp\Client;
+
+uses(RoutingTestCase::class)->group('integration');
+
+expect()->extend('toHaveBodyClass', function (string $class) {
+    preg_match('/<body[^>]*class=["\']([^"\']*)["\']/', $this->value, $matches);
+    expect($matches)->toHaveCount(2, 'No body tag with class attribute found');
+    expect($matches[1])->toContain($class);
+
+    return $this;
+});
+
+it('handles the test route', function () {
+    $client = new Client([
+        'verify' => false,
+    ]);
+
+    $response = $client->request('GET', 'http://web:8080/test/');
+    expect($response->getStatusCode())->toBe(200);
+    expect((string) $response->getBody())->toContain('Howdy');
+});
+
+it('does not intercept WordPress admin routes', function () {
+    $client = new Client([
+        'verify' => false,
+        'allow_redirects' => false,
+    ]);
+
+    $response = $client->request('GET', 'http://web:8080/wp/wp-admin/');
+    expect($response->getStatusCode())->toBe(302);
+    expect($response->getHeader('Location')[0])->toContain('wp-login.php');
+});
+
+it('handles non-existent routes with 404', function () {
+    $client = new Client([
+        'verify' => false,
+        'http_errors' => false,
+    ]);
+
+    $response = $client->request('GET', 'http://web:8080/non-existent-'.time());
+    expect($response->getStatusCode())->toBe(404);
+    expect((string) $response->getBody())->toContain('Page not found');
+    expect((string) $response->getBody())->toHaveBodyClass('error404');
+});
+
+it('handles default homepage', function () {
+    $client = new Client([
+        'verify' => false,
+    ]);
+
+    $response = $client->request('GET', 'http://web:8080/');
+    expect($response->getStatusCode())->toBe(200);
+    expect((string) $response->getBody())->toHaveBodyClass('home');
+});
+
+it('handles WordPress REST API routes', function () {
+    $client = new Client([
+        'verify' => false,
+    ]);
+
+    $response = $client->request('GET', 'http://web:8080/wp-json/');
+    expect($response->getStatusCode())->toBe(200);
+
+    $data = json_decode((string) $response->getBody(), true);
+    expect($data)->toHaveKey('name');
+    expect($data)->toHaveKey('url');
+});
+
+it('handles WordPress search route', function () {
+    $client = new Client([
+        'verify' => false,
+    ]);
+
+    $response = $client->request('GET', 'http://web:8080/search/test/');
+    expect($response->getStatusCode())->toBe(200);
+    expect((string) $response->getBody())->toHaveBodyClass('search');
+});
diff --git a/tests/Integration/Routing/RoutingTestCase.php b/tests/Integration/Routing/RoutingTestCase.php
new file mode 100644
index 00000000..ff0ebe1b
--- /dev/null
+++ b/tests/Integration/Routing/RoutingTestCase.php
@@ -0,0 +1,72 @@
+<?php
+
+namespace Roots\Acorn\Tests\Integration\Routing;
+
+use Illuminate\Foundation\Testing\Concerns\MakesHttpRequests;
+use Mockery\Adapter\Phpunit\MockeryTestCase;
+use Roots\Acorn\Tests\Test\Concerns\SupportsGlobalStubs;
+use Roots\Acorn\Tests\Test\Concerns\SupportsScopedFixtures;
+
+class RoutingTestCase extends MockeryTestCase
+{
+    use MakesHttpRequests;
+    use SupportsGlobalStubs;
+    use SupportsScopedFixtures;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $this->clearStubs();
+
+        // Ensure routes directory exists
+        if (! is_dir('/roots/app/public/routes')) {
+            mkdir('/roots/app/public/routes', 0777, true);
+        }
+
+        // Create web.php routes file
+        $webRoutes = <<<'PHP'
+<?php
+
+use Illuminate\Support\Facades\Route;
+
+Route::middleware(['web'])->group(function () {
+    Route::get('/test', fn() => 'Howdy')->name('test');
+});
+PHP;
+
+        file_put_contents('/roots/app/public/routes/web.php', $webRoutes);
+
+        // Ensure mu-plugins directory exists
+        if (! is_dir('/roots/app/public/content/mu-plugins')) {
+            mkdir('/roots/app/public/content/mu-plugins', 0777, true);
+        }
+
+        // Create or update the Acorn boot mu-plugin
+        $bootPlugin = <<<'PHP'
+<?php
+/*
+Plugin Name: Acorn Boot
+*/
+
+use Roots\Acorn\Application;
+use Roots\Acorn\Configuration\Exceptions;
+use Roots\Acorn\Configuration\Middleware;
+
+add_action('after_setup_theme', function () {
+    Application::configure()
+        ->withMiddleware(function (Middleware $middleware) {
+            //
+        })
+        ->withExceptions(function (Exceptions $exceptions) {
+            //
+        })
+        ->withRouting(
+            web: '/roots/app/public/routes/web.php'
+        )
+        ->boot();
+}, 0);
+PHP;
+
+        file_put_contents('/roots/app/public/content/mu-plugins/01-acorn-boot.php', $bootPlugin);
+    }
+}