Merge branch '6.4' into 7.2

* 6.4:
  cs tweak
  [FrameworkBundle] ensureKernelShutdown in tearDownAfterClass
  Revert "bug symfony#60564 [FrameworkBundle] ensureKernelShutdown in tearDownAfterClass (cquintana92)"

Author: nicolas-grekas

.github/workflows/unit-tests.yml

@@ -92,7 +92,7 @@ jobs:
 
           # Create local composer packages for each patched components and reference them in composer.json files when cross-testing components
           if [[ ! "${{ matrix.mode }}" = *-deps ]]; then
-              php .github/build-packages.php HEAD^ $SYMFONY_VERSION src/Symfony/Bridge/PhpUnit
+            php .github/build-packages.php HEAD^ $SYMFONY_VERSION src/Symfony/Bridge/PhpUnit
           else
             echo SYMFONY_DEPRECATIONS_HELPER=weak >> $GITHUB_ENV
             cp composer.json composer.json.orig

src/Symfony/Bundle/FrameworkBundle/Test/KernelTestCase.php

@@ -11,7 +11,6 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Test;
 
-use PHPUnit\Framework\Attributes\AfterClass;
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Container;
 use Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException;
@@ -40,6 +39,14 @@ protected function tearDown(): void
         static::$booted = false;
     }
 
+    public static function tearDownAfterClass(): void
+    {
+        static::ensureKernelShutdown();
+        static::$class = null;
+        static::$kernel = null;
+        static::$booted = false;
+    }
+
     /**
      * @throws \RuntimeException
      * @throws \LogicException
@@ -113,11 +120,8 @@ protected static function createKernel(array $options = []): KernelInterface
 
     /**
      * Shuts the kernel down if it was used in the test - called by the tearDown method by default.
-     *
-     * @afterClass
      */
-    #[AfterClass]
-    public static function ensureKernelShutdown()
+    protected static function ensureKernelShutdown()
     {
         if (null !== static::$kernel) {
             static::$kernel->boot();