diff --git a/tests/src/Kernel/InvalidPermissionsTest.php b/tests/src/Kernel/InvalidPermissionsTest.php
index b91547a..cd43e1c 100644
--- a/tests/src/Kernel/InvalidPermissionsTest.php
+++ b/tests/src/Kernel/InvalidPermissionsTest.php
@@ -4,6 +4,7 @@ declare(strict_types=1);
 
 namespace Drupal\Tests\role_enum\Kernel;
 
+use PHPUnit\Framework\Attributes\RunTestsInSeparateProcesses;
 use Drupal\Core\Config\ImportStorageTransformer;
 use Drupal\Core\Config\MemoryStorage;
 use Drupal\Core\DependencyInjection\ContainerBuilder;
@@ -14,6 +15,7 @@ use Drupal\KernelTests\KernelTestBase;
 /**
  * Tests Role Enum property and trait.
  */
+#[RunTestsInSeparateProcesses]
 final class InvalidPermissionsTest extends KernelTestBase {
 
   protected static $modules = [
@@ -23,6 +25,9 @@ final class InvalidPermissionsTest extends KernelTestBase {
     'role_enum_invalid_permission_test',
   ];
 
+  /**
+   *
+   */
   protected function setUp(): void {
     parent::setUp();
     $this->installEntitySchema('user');
@@ -53,6 +58,9 @@ final class InvalidPermissionsTest extends KernelTestBase {
     $transformer->transform(new MemoryStorage());
   }
 
+  /**
+   *
+   */
   public function register(ContainerBuilder $container): void {
     // Test users will get a uid1, make sure it doesn't affect asserts.
     $container->setParameter('security.enable_super_user', FALSE);
diff --git a/tests/src/Kernel/RoleEnumTest.php b/tests/src/Kernel/RoleEnumTest.php
index 3010a8e..47c223c 100644
--- a/tests/src/Kernel/RoleEnumTest.php
+++ b/tests/src/Kernel/RoleEnumTest.php
@@ -4,6 +4,7 @@ declare(strict_types=1);
 
 namespace Drupal\Tests\role_enum\Kernel;
 
+use PHPUnit\Framework\Attributes\RunTestsInSeparateProcesses;
 use Drupal\Core\Config\CachedStorage;
 use Drupal\Core\Config\StorageInterface;
 use Drupal\Core\DependencyInjection\ContainerBuilder;
@@ -19,6 +20,7 @@ use Drupal\user\PermissionHandlerInterface;
 /**
  * Tests Role Enum property and trait.
  */
+#[RunTestsInSeparateProcesses]
 final class RoleEnumTest extends KernelTestBase {
 
   protected static $modules = [
@@ -28,6 +30,9 @@ final class RoleEnumTest extends KernelTestBase {
     'role_enum_test',
   ];
 
+  /**
+   *
+   */
   protected function setUp(): void {
     parent::setUp();
     $this->installEntitySchema('user');
@@ -35,6 +40,9 @@ final class RoleEnumTest extends KernelTestBase {
     Role::create(['id' => TestRoles::Bar->value, 'label' => 'Test'])->setSyncing(TRUE)->save();
   }
 
+  /**
+   *
+   */
   public function testRolePermissions(): void {
     // Configuration sync inspired by config_filter.
     $active = $this->container->get('config.storage');
@@ -70,6 +78,9 @@ final class RoleEnumTest extends KernelTestBase {
     static::assertTrue($user2->hasPermission('role_enum_test three e'));
   }
 
+  /**
+   *
+   */
   public function testProperty(): void {
     $user = User::create(['name' => $this->randomMachineName()]);
     $user->save();
@@ -85,6 +96,9 @@ final class RoleEnumTest extends KernelTestBase {
     static::assertTrue($user->r->add(TestRoles::Foo)->r->has(TestRoles::Foo));
   }
 
+  /**
+   *
+   */
   public function testTrait(): void {
     $user = User::create(['name' => $this->randomMachineName()]);
     $user->save();
@@ -100,6 +114,9 @@ final class RoleEnumTest extends KernelTestBase {
     static::assertTrue($user->roleEnumAdd(TestRoles::Foo)->roleEnumHas(TestRoles::Foo));
   }
 
+  /**
+   *
+   */
   public function testPermissions(): void {
     $permissions = \Drupal::service(PermissionHandlerInterface::class)->getPermissions();
     static::assertArrayHasKey('role_enum_test one a', $permissions);
@@ -122,6 +139,9 @@ final class RoleEnumTest extends KernelTestBase {
     return $this->container->get('config.import_transformer')->transform($this->container->get('config.storage.sync'));
   }
 
+  /**
+   *
+   */
   public function register(ContainerBuilder $container): void {
     // Test users will get a uid1, make sure it doesn't affect asserts.
     $container->setParameter('security.enable_super_user', FALSE);