diff --git a/.vortex/installer/tests/Fixtures/handler_process/_baseline/tests/phpunit/Drupal/SettingsTestCase.php b/.vortex/installer/tests/Fixtures/handler_process/_baseline/tests/phpunit/Drupal/SettingsTestCase.php
index ee438d536..bafacd49e 100644
--- a/.vortex/installer/tests/Fixtures/handler_process/_baseline/tests/phpunit/Drupal/SettingsTestCase.php
+++ b/.vortex/installer/tests/Fixtures/handler_process/_baseline/tests/phpunit/Drupal/SettingsTestCase.php
@@ -132,19 +132,13 @@ protected function tearDown(): void {
    */
   protected function setEnvVars(array $vars): void {
     // Unset the existing environment variable if not set in the test.
-    if (!isset($vars['TMP'])) {
-      $vars['TMP'] = NULL;
-    }
+    $vars['TMP'] ??= NULL;
 
     // Unset the existing environment variable if not set in the test.
-    if (!isset($vars['DRUPAL_CONFIG_PATH'])) {
-      $vars['DRUPAL_CONFIG_PATH'] = NULL;
-    }
+    $vars['DRUPAL_CONFIG_PATH'] ??= NULL;
 
     // Do not enforce the CI environment unless it is explicitly set.
-    if (!isset($vars['CI'])) {
-      $vars['CI'] = FALSE;
-    }
+    $vars['CI'] ??= FALSE;
 
     // Filtered real vars without a value to unset them in the lines below.
     $vars_real = self::getRealEnvVarsFilteredNoValues(static::ALLOWED_ENV_VARS);
diff --git a/.vortex/installer/tests/Fixtures/handler_process/hosting_acquia/tests/phpunit/Drupal/SettingsTestCase.php b/.vortex/installer/tests/Fixtures/handler_process/hosting_acquia/tests/phpunit/Drupal/SettingsTestCase.php
index e4dea1a63..7823a4cb7 100644
--- a/.vortex/installer/tests/Fixtures/handler_process/hosting_acquia/tests/phpunit/Drupal/SettingsTestCase.php
+++ b/.vortex/installer/tests/Fixtures/handler_process/hosting_acquia/tests/phpunit/Drupal/SettingsTestCase.php
@@ -1,4 +1,4 @@
-@@ -193,7 +193,7 @@
+@@ -187,7 +187,7 @@
     * Require settings file.
     */
    protected function requireSettingsFile(array $pre_settings = [], array $pre_config = []): void {
diff --git a/.vortex/installer/tests/Fixtures/handler_process/hosting_project_name___acquia/tests/phpunit/Drupal/SettingsTestCase.php b/.vortex/installer/tests/Fixtures/handler_process/hosting_project_name___acquia/tests/phpunit/Drupal/SettingsTestCase.php
index e4dea1a63..7823a4cb7 100644
--- a/.vortex/installer/tests/Fixtures/handler_process/hosting_project_name___acquia/tests/phpunit/Drupal/SettingsTestCase.php
+++ b/.vortex/installer/tests/Fixtures/handler_process/hosting_project_name___acquia/tests/phpunit/Drupal/SettingsTestCase.php
@@ -1,4 +1,4 @@
-@@ -193,7 +193,7 @@
+@@ -187,7 +187,7 @@
     * Require settings file.
     */
    protected function requireSettingsFile(array $pre_settings = [], array $pre_config = []): void {
diff --git a/composer.json b/composer.json
index 3c42f9737..2d41023e8 100644
--- a/composer.json
+++ b/composer.json
@@ -56,12 +56,12 @@
         "phpcompatibility/php-compatibility": "^10.0@alpha",
         "phpspec/prophecy-phpunit": "^2.5",
         "phpstan/extension-installer": "^1.4.3",
-        "phpstan/phpstan": "^2.2.8",
+        "phpstan/phpstan": "^2.2.10",
         "phpunit/phpunit": "^11.5.56",
         "pyrech/composer-changelogs": "^2.2",
-        "rector/rector": "^2.6.3",
+        "rector/rector": "^2.6.4",
         "softcreatr/jsonpath": "^0.10 || ^1.0",
-        "vincentlanglet/twig-cs-fixer": "^4.0.2"
+        "vincentlanglet/twig-cs-fixer": "^4.1.0"
     },
     "conflict": {
         "drupal/drupal": "*"
diff --git a/tests/phpunit/Drupal/SettingsTestCase.php b/tests/phpunit/Drupal/SettingsTestCase.php
index dabf01d3c..4e4bfedd2 100644
--- a/tests/phpunit/Drupal/SettingsTestCase.php
+++ b/tests/phpunit/Drupal/SettingsTestCase.php
@@ -135,19 +135,13 @@ protected function tearDown(): void {
    */
   protected function setEnvVars(array $vars): void {
     // Unset the existing environment variable if not set in the test.
-    if (!isset($vars['TMP'])) {
-      $vars['TMP'] = NULL;
-    }
+    $vars['TMP'] ??= NULL;
 
     // Unset the existing environment variable if not set in the test.
-    if (!isset($vars['DRUPAL_CONFIG_PATH'])) {
-      $vars['DRUPAL_CONFIG_PATH'] = NULL;
-    }
+    $vars['DRUPAL_CONFIG_PATH'] ??= NULL;
 
     // Do not enforce the CI environment unless it is explicitly set.
-    if (!isset($vars['CI'])) {
-      $vars['CI'] = FALSE;
-    }
+    $vars['CI'] ??= FALSE;
 
     // Filtered real vars without a value to unset them in the lines below.
     $vars_real = self::getRealEnvVarsFilteredNoValues(static::ALLOWED_ENV_VARS);