diff --git a/src/bundle/DependencyInjection/CompilerPass/RemoveUnsatisfiableHooksPass.php b/src/bundle/DependencyInjection/CompilerPass/RemoveUnsatisfiableHooksPass.php
index e76fd70..1c4f0d8 100644
--- a/src/bundle/DependencyInjection/CompilerPass/RemoveUnsatisfiableHooksPass.php
+++ b/src/bundle/DependencyInjection/CompilerPass/RemoveUnsatisfiableHooksPass.php
@@ -9,8 +9,12 @@
 namespace Ibexa\Bundle\Test\Core\DependencyInjection\CompilerPass;
 
 use Ibexa\Bundle\RepositoryInstaller\Event\Subscriber\BuildSchemaSubscriber;
+use Ibexa\Contracts\Core\Test\Persistence\Fixture\FixtureImporter;
 use Ibexa\Contracts\DoctrineSchema\Builder\SchemaBuilderInterface;
 use Ibexa\Contracts\Test\Core\Bootstrapper\DatabaseSchemaHook;
+use Ibexa\Contracts\Test\Core\Bootstrapper\FixtureHook;
+use Ibexa\Contracts\Test\Core\Bootstrapper\PurgeIndexAfterFixturesHook;
+use Ibexa\Contracts\Test\Core\Bootstrapper\PurgeSearchIndexHook;
 use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 
@@ -30,6 +34,9 @@ final class RemoveUnsatisfiableHooksPass implements CompilerPassInterface
             // tables but none of core's
             BuildSchemaSubscriber::class,
         ],
+        FixtureHook::class => [FixtureImporter::class],
+        PurgeSearchIndexHook::class => ['ibexa.spi.search'],
+        PurgeIndexAfterFixturesHook::class => ['ibexa.spi.search'],
     ];
 
     public function process(ContainerBuilder $container): void
diff --git a/src/contracts/Bootstrapper/Bootstrapper.php b/src/contracts/Bootstrapper/Bootstrapper.php
index f73705d..e6b3c13 100644
--- a/src/contracts/Bootstrapper/Bootstrapper.php
+++ b/src/contracts/Bootstrapper/Bootstrapper.php
@@ -8,10 +8,10 @@
 
 namespace Ibexa\Contracts\Test\Core\Bootstrapper;
 
-use Ibexa\Contracts\Test\Core\IbexaTestKernel;
 use LogicException;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException;
+use Symfony\Component\HttpKernel\KernelInterface;
 use Symfony\Component\OptionsResolver\Options;
 use Symfony\Component\OptionsResolver\OptionsResolver;
 
@@ -74,7 +74,7 @@ public function __construct(
     public function bootstrap(
         ?string $kernelClass = null,
         array $options = []
-    ): IbexaTestKernel {
+    ): KernelInterface {
         $kernel = $this->kernelProvider->getKernel($kernelClass);
 
         $testContainer = self::getService($kernel->getContainer(), 'test.service_container', ContainerInterface::class);
diff --git a/src/contracts/Bootstrapper/DatabasePreparer.php b/src/contracts/Bootstrapper/DatabasePreparer.php
index 6c70a61..0a1ceb8 100644
--- a/src/contracts/Bootstrapper/DatabasePreparer.php
+++ b/src/contracts/Bootstrapper/DatabasePreparer.php
@@ -8,8 +8,8 @@
 
 namespace Ibexa\Contracts\Test\Core\Bootstrapper;
 
-use Ibexa\Contracts\Test\Core\IbexaTestKernel;
 use Symfony\Bundle\FrameworkBundle\Console\Application;
+use Symfony\Component\HttpKernel\KernelInterface;
 
 /**
  * @internal
@@ -23,7 +23,7 @@ public function __construct()
         $this->consoleCommandRunner = new ConsoleCommandRunner();
     }
 
-    public function prepareDatabase(IbexaTestKernel $kernel, bool $runSchemaUpdate): void
+    public function prepareDatabase(KernelInterface $kernel, bool $runSchemaUpdate): void
     {
         $application = new Application($kernel);
         $application->setAutoExit(false);
diff --git a/src/contracts/Bootstrapper/DatabasePreparerInterface.php b/src/contracts/Bootstrapper/DatabasePreparerInterface.php
index be1c269..2ffe0f0 100644
--- a/src/contracts/Bootstrapper/DatabasePreparerInterface.php
+++ b/src/contracts/Bootstrapper/DatabasePreparerInterface.php
@@ -8,7 +8,7 @@
 
 namespace Ibexa\Contracts\Test\Core\Bootstrapper;
 
-use Ibexa\Contracts\Test\Core\IbexaTestKernel;
+use Symfony\Component\HttpKernel\KernelInterface;
 
 /**
  * @experimental
@@ -22,5 +22,5 @@ interface DatabasePreparerInterface
     /**
      * @throws \Exception command failures propagate as-is
      */
-    public function prepareDatabase(IbexaTestKernel $kernel, bool $runSchemaUpdate): void;
+    public function prepareDatabase(KernelInterface $kernel, bool $runSchemaUpdate): void;
 }
diff --git a/src/contracts/Bootstrapper/KernelProvider.php b/src/contracts/Bootstrapper/KernelProvider.php
index 78c6d7e..a32338a 100644
--- a/src/contracts/Bootstrapper/KernelProvider.php
+++ b/src/contracts/Bootstrapper/KernelProvider.php
@@ -8,22 +8,22 @@
 
 namespace Ibexa\Contracts\Test\Core\Bootstrapper;
 
-use Ibexa\Contracts\Test\Core\IbexaTestKernel;
 use LogicException;
+use Symfony\Component\HttpKernel\KernelInterface;
 
 /**
  * @internal
  */
 final class KernelProvider implements KernelProviderInterface
 {
-    public function getKernel(?string $kernelClass): IbexaTestKernel
+    public function getKernel(?string $kernelClass): KernelInterface
     {
         $kernelClass ??= $_ENV['KERNEL_CLASS'] ?? $_SERVER['KERNEL_CLASS'] ?? null;
-        if ($kernelClass === null || !is_a($kernelClass, IbexaTestKernel::class, true)) {
+        if ($kernelClass === null || !is_a($kernelClass, KernelInterface::class, true)) {
             throw new LogicException(sprintf(
-                'The kernel class "%s" must be a subclass of "%s". Ensure that the KERNEL_CLASS environment variable is set to a valid test kernel class.',
+                'The kernel class "%s" must implement "%s". Ensure that the KERNEL_CLASS environment variable is set to a valid test kernel class.',
                 $kernelClass ?? 'null',
-                IbexaTestKernel::class,
+                KernelInterface::class,
             ));
         }
 
diff --git a/src/contracts/Bootstrapper/KernelProviderInterface.php b/src/contracts/Bootstrapper/KernelProviderInterface.php
index abf20a5..d692fe1 100644
--- a/src/contracts/Bootstrapper/KernelProviderInterface.php
+++ b/src/contracts/Bootstrapper/KernelProviderInterface.php
@@ -8,7 +8,7 @@
 
 namespace Ibexa\Contracts\Test\Core\Bootstrapper;
 
-use Ibexa\Contracts\Test\Core\IbexaTestKernel;
+use Symfony\Component\HttpKernel\KernelInterface;
 
 /**
  * @experimental
@@ -20,8 +20,8 @@
 interface KernelProviderInterface
 {
     /**
-     * @throws \LogicException if $kernelClass (or its env/server fallback) isn't a valid
-     *                          IbexaTestKernel subclass
+     * @throws \LogicException if $kernelClass (or its env/server fallback) doesn't name a
+     *                          bootable {@see KernelInterface} implementation
      */
-    public function getKernel(?string $kernelClass): IbexaTestKernel;
+    public function getKernel(?string $kernelClass): KernelInterface;
 }
diff --git a/tests/contracts/Bootstrapper/KernelProviderTest.php b/tests/contracts/Bootstrapper/KernelProviderTest.php
index 9eb1682..249cc84 100644
--- a/tests/contracts/Bootstrapper/KernelProviderTest.php
+++ b/tests/contracts/Bootstrapper/KernelProviderTest.php
@@ -13,6 +13,8 @@
 use LogicException;
 use PHPUnit\Framework\TestCase;
 use stdClass;
+use Symfony\Component\Config\Loader\LoaderInterface;
+use Symfony\Component\HttpKernel\Kernel;
 
 /**
  * @covers \Ibexa\Contracts\Test\Core\Bootstrapper\KernelProvider
@@ -52,8 +54,8 @@ protected function tearDown(): void
     }
 
     /**
-     * @testWith [null, "The kernel class \"null\" must be a subclass of \"Ibexa\\Contracts\\Test\\Core\\IbexaTestKernel\". Ensure that the KERNEL_CLASS environment variable is set to a valid test kernel class."]
-     *           ["stdClass", "The kernel class \"stdClass\" must be a subclass of \"Ibexa\\Contracts\\Test\\Core\\IbexaTestKernel\". Ensure that the KERNEL_CLASS environment variable is set to a valid test kernel class."]
+     * @testWith [null, "The kernel class \"null\" must implement \"Symfony\\Component\\HttpKernel\\KernelInterface\". Ensure that the KERNEL_CLASS environment variable is set to a valid test kernel class."]
+     *           ["stdClass", "The kernel class \"stdClass\" must implement \"Symfony\\Component\\HttpKernel\\KernelInterface\". Ensure that the KERNEL_CLASS environment variable is set to a valid test kernel class."]
      */
     public function testThrowsWhenKernelClassIsInvalid(?string $kernelClass, string $exceptionMessage): void
     {
@@ -91,6 +93,14 @@ public function testArgumentTakesPrecedenceOverEnvAndServerFallbacks(): void
         self::assertInstanceOf(NoopBootTestKernel::class, $kernel);
     }
 
+    public function testAcceptsAnyKernelInterfaceImplementation(): void
+    {
+        $kernel = (new KernelProvider())->getKernel(NoopBootPlainKernel::class);
+
+        self::assertInstanceOf(NoopBootPlainKernel::class, $kernel);
+        self::assertTrue($kernel->didBoot);
+    }
+
     public function testBootsTheReturnedKernel(): void
     {
         $kernel = (new KernelProvider())->getKernel(NoopBootTestKernel::class);
@@ -100,6 +110,30 @@ public function testBootsTheReturnedKernel(): void
     }
 }
 
+final class NoopBootPlainKernel extends Kernel
+{
+    public bool $didBoot = false;
+
+    public function __construct()
+    {
+        parent::__construct('test', true);
+    }
+
+    public function boot(): void
+    {
+        $this->didBoot = true;
+    }
+
+    public function registerBundles(): iterable
+    {
+        return [];
+    }
+
+    public function registerContainerConfiguration(LoaderInterface $loader): void
+    {
+    }
+}
+
 final class NoopBootTestKernel extends IbexaTestKernel
 {
     public bool $didBoot = false;