diff --git a/.github/workflows/test-turbo.yml b/.github/workflows/test-turbo.yml
index 47008d2605a..cc215185afa 100644
--- a/.github/workflows/test-turbo.yml
+++ b/.github/workflows/test-turbo.yml
@@ -65,8 +65,6 @@ jobs:
             - name: Checkout
               uses: actions/checkout@v4
 
-            - run: corepack enable
-
             - name: Setup PHP
               uses: shivammathur/setup-php@v2
               with:
@@ -81,25 +79,9 @@ jobs:
                 working-directory: src/Turbo
                 dependency-versions: ${{ matrix.dependency-version }}
 
-            - name: Get yarn cache directory path
-              id: yarn-cache-dir-path
-              run: echo "dir=$(yarn config get cacheFolder)" >> $GITHUB_OUTPUT
-
-            - uses: actions/cache@v4
-              id: yarn-cache
-              with:
-                  path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
-                  key: ${{ runner.os }}-yarn-${{ hashFiles('**/package.json') }}
-                  restore-keys: |
-                      ${{ runner.os }}-yarn-
-
             - name: Install JavaScript dependencies
               working-directory: src/Turbo/tests/app
-              run: touch yarn.lock && yarn install --mode update-lockfile && yarn install
-
-            - name: Build JavaScript
-              working-directory: src/Turbo/tests/app
-              run: yarn build
+              run: php public/index.php importmap:install
 
             - name: Create DB
               working-directory: src/Turbo/tests/app
diff --git a/src/Turbo/.gitignore b/src/Turbo/.gitignore
index 264070be8bd..2f9ac49a826 100644
--- a/src/Turbo/.gitignore
+++ b/src/Turbo/.gitignore
@@ -5,8 +5,7 @@
 /composer.lock
 /phpunit.xml
 /vendor/
-/tests/app/var
+/tests/app/assets/vendor/
+/tests/app/var/
 /tests/app/public/build/
 node_modules/
-package-lock.json
-yarn.lock
diff --git a/src/Turbo/composer.json b/src/Turbo/composer.json
index e3cb46514a4..951fdefeb36 100644
--- a/src/Turbo/composer.json
+++ b/src/Turbo/composer.json
@@ -41,12 +41,13 @@
         "doctrine/doctrine-bundle": "^2.4.3",
         "doctrine/orm": "^2.8 | 3.0",
         "phpstan/phpstan": "^1.10",
+        "symfony/asset-mapper": "^6.4|^7.0",
         "symfony/debug-bundle": "^5.4|^6.0|^7.0",
         "symfony/form": "^5.4|^6.0|^7.0",
-        "symfony/framework-bundle": "^5.4|^6.0|^7.0",
+        "symfony/framework-bundle": "^6.4|^7.0",
         "symfony/mercure-bundle": "^0.3.7",
         "symfony/messenger": "^5.4|^6.0|^7.0",
-        "symfony/panther": "^1.0|^2.0",
+        "symfony/panther": "^2.1",
         "symfony/phpunit-bridge": "^5.4|^6.0|^7.0",
         "symfony/process": "^5.4|6.3.*|^7.0",
         "symfony/property-access": "^5.4|^6.0|^7.0",
diff --git a/src/Turbo/tests/BroadcastTest.php b/src/Turbo/tests/BroadcastTest.php
index 3fee2ec3a6a..f95b00cde54 100644
--- a/src/Turbo/tests/BroadcastTest.php
+++ b/src/Turbo/tests/BroadcastTest.php
@@ -26,8 +26,8 @@ class BroadcastTest extends PantherTestCase
 
     protected function setUp(): void
     {
-        if (!file_exists(__DIR__.'/app/public/build')) {
-            throw new \Exception(\sprintf('Move into "%s" and execute Encore before running this test.', realpath(__DIR__.'/app')));
+        if (!file_exists(__DIR__.'/app/assets/vendor/installed.php')) {
+            throw new \Exception(\sprintf('Move into "%s" and execute `php public/index.php importmap:install` before running this test.', realpath(__DIR__.'/app')));
         }
 
         parent::setUp();
diff --git a/src/Turbo/tests/app/Kernel.php b/src/Turbo/tests/app/Kernel.php
index 5e2594135e0..331295ddccb 100644
--- a/src/Turbo/tests/app/Kernel.php
+++ b/src/Turbo/tests/app/Kernel.php
@@ -67,10 +67,13 @@ protected function configureContainer(ContainerConfigurator $container): void
     {
         $container->extension('framework', [
             'secret' => 'ChangeMe',
-            'test' => 'test' === ($_SERVER['APP_ENV'] ?? 'dev'),
+            'test' => 'test' === $this->environment,
             'router' => [
                 'utf8' => true,
             ],
+            'asset_mapper' => [
+                'paths' => ['assets/']
+            ],
             'profiler' => [
                 'only_exceptions' => false,
             ],
diff --git a/src/Turbo/tests/app/assets/controllers.json b/src/Turbo/tests/app/assets/controllers.json
new file mode 100644
index 00000000000..21f1964543f
--- /dev/null
+++ b/src/Turbo/tests/app/assets/controllers.json
@@ -0,0 +1,5 @@
+{
+    "controllers": {
+    },
+    "entrypoints": []
+}
diff --git a/src/Turbo/tests/app/assets/controllers/.gitignore b/src/Turbo/tests/app/assets/controllers/.gitignore
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/src/Turbo/tests/app/importmap.php b/src/Turbo/tests/app/importmap.php
new file mode 100644
index 00000000000..68e52d3d234
--- /dev/null
+++ b/src/Turbo/tests/app/importmap.php
@@ -0,0 +1,31 @@
+<?php
+
+/**
+ * Returns the importmap for this application.
+ *
+ * - "path" is a path inside the asset mapper system. Use the
+ *     "debug:asset-map" command to see the full list of paths.
+ *
+ * - "entrypoint" (JavaScript only) set to true for any module that will
+ *     be used as an "entrypoint" (and passed to the importmap() Twig function).
+ *
+ * The "importmap:require" command can be used to add new entries to this file.
+ */
+return [
+    'app' => [
+        'path' => './assets/app.js',
+        'entrypoint' => true,
+    ],
+    '@hotwired/stimulus' => [
+        'version' => '3.2.2',
+    ],
+    '@symfony/stimulus-bundle' => [
+        'path' => '../../vendor/symfony/stimulus-bundle/assets/dist/loader.js',
+    ],
+    '@symfony/ux-turbo/dist/turbo_stream_controller' => [
+        'path' => '../../assets/dist/turbo_stream_controller.js'
+    ],
+    '@hotwired/turbo' => [
+        'version' => '7.3.0',
+    ],
+];
diff --git a/src/Turbo/tests/app/package.json b/src/Turbo/tests/app/package.json
deleted file mode 100644
index 43fc6df5435..00000000000
--- a/src/Turbo/tests/app/package.json
+++ /dev/null
@@ -1,27 +0,0 @@
-{
-    "packageManager": "yarn@4.5.0",
-    "devDependencies": {
-        "@babel/core": "^7.20.12",
-        "@babel/preset-env": "^7.20.2",
-        "@hotwired/stimulus": "^3.0.0",
-        "@hotwired/turbo": "^7.0.1",
-        "@symfony/ux-turbo": "file:../../assets",
-        "@symfony/webpack-encore": "^4.2.0",
-        "core-js": "^3.0.0",
-        "regenerator-runtime": "^0.13.2",
-        "webpack": "^5.75.0",
-        "webpack-cli": "^5.0.1",
-        "webpack-notifier": "^1.6.0"
-    },
-    "resolutions": {
-        "coa": "2.0.2"
-    },
-    "license": "MIT",
-    "private": true,
-    "scripts": {
-        "dev-server": "encore dev-server",
-        "dev": "encore dev",
-        "watch": "encore dev --watch",
-        "build": "encore production --progress"
-    }
-}
diff --git a/src/Turbo/tests/app/templates/base.html.twig b/src/Turbo/tests/app/templates/base.html.twig
index 0a3c7a37350..0d532df5fab 100644
--- a/src/Turbo/tests/app/templates/base.html.twig
+++ b/src/Turbo/tests/app/templates/base.html.twig
@@ -4,7 +4,9 @@
         <meta charset="UTF-8">
         <title>Symfony UX Turbo</title>
         {% block stylesheets %}{% endblock %}
-        {{ encore_entry_script_tags('app') }}
+        {% block javascripts %}
+            {% block importmap %}{{ importmap('app') }}{% endblock %}
+        {% endblock %}
     </head>
     <body>
         <nav id="navigation">
diff --git a/src/Turbo/tests/app/webpack.config.js b/src/Turbo/tests/app/webpack.config.js
deleted file mode 100644
index aeb1151b30b..00000000000
--- a/src/Turbo/tests/app/webpack.config.js
+++ /dev/null
@@ -1,23 +0,0 @@
-var Encore = require('@symfony/webpack-encore');
-
-if (!Encore.isRuntimeEnvironmentConfigured()) {
-    Encore.configureRuntimeEnvironment(process.env.NODE_ENV || 'dev');
-}
-
-Encore
-    .setOutputPath('public/build/')
-    .setPublicPath('/build')
-    .addEntry('app', './assets/app.js')
-    .splitEntryChunks()
-    .enableSingleRuntimeChunk()
-    .cleanupOutputBeforeBuild()
-    .enableBuildNotifications()
-    .enableSourceMaps(!Encore.isProduction())
-    .enableVersioning(Encore.isProduction())
-    .configureBabelPresetEnv((config) => {
-        config.useBuiltIns = 'usage';
-        config.corejs = 3;
-    })
-;
-
-module.exports = Encore.getWebpackConfig();