diff --git a/tests/Functional/BundleFunctionalTest.php b/tests/Functional/BundleFunctionalTest.php
index f9cd187..fe01c2e 100644
--- a/tests/Functional/BundleFunctionalTest.php
+++ b/tests/Functional/BundleFunctionalTest.php
@@ -9,6 +9,8 @@
 use Pixelshaped\FlatMapperBundle\PixelshapedFlatMapperBundle;
 use Symfony\Component\Config\Loader\LoaderInterface;
 use Symfony\Component\HttpKernel\Kernel;
+use Symfony\Contracts\Cache\CacheInterface;
+use Symfony\Contracts\Cache\ItemInterface;
 
 #[CoversClass(FlatMapper::class)]
 #[CoversClass(PixelshapedFlatMapperBundle::class)]
@@ -22,6 +24,15 @@ public function testServiceWiring(): void
         $flatMapper = $container->get('pixelshaped_flat_mapper.flat_mapper');
         $this->assertInstanceOf(FlatMapper::class, $flatMapper);
     }
+
+    public function testServiceWiringWithCacheService(): void
+    {
+        $kernel = new PixelshapedFlatMapperTestingKernelWithCache('test', true);
+        $kernel->boot();
+        $container = $kernel->getContainer();
+        $flatMapper = $container->get('pixelshaped_flat_mapper.flat_mapper');
+        $this->assertInstanceOf(FlatMapper::class, $flatMapper);
+    }
 }
 
 class PixelshapedFlatMapperTestingKernel extends Kernel
@@ -35,4 +46,57 @@ public function registerBundles(): iterable
     public function registerContainerConfiguration(LoaderInterface $loader)
     {
     }
+}
+
+class PixelshapedFlatMapperTestingKernelWithCache extends Kernel
+{
+    public function registerBundles(): iterable
+    {
+        return [
+            new PixelshapedFlatMapperBundle(),
+        ];
+    }
+    public function registerContainerConfiguration(LoaderInterface $loader)
+    {
+        $loader->load(function ($container) {
+            // Register a mock cache service
+            $container->register('cache.app', MockCacheAdapter::class);
+
+            $container->loadFromExtension('pixelshaped_flat_mapper', [
+                'cache_service' => 'cache.app',
+                'validate_mapping' => false,
+            ]);
+        });
+    }
+}
+
+class MockCacheAdapter implements CacheInterface
+{
+    /**
+     * @param array<string, mixed>|null $metadata
+     */
+    public function get(string $key, callable $callback, ?float $beta = null, ?array &$metadata = null): mixed
+    {
+        return $callback($this->createMockItem(), false);
+    }
+
+    public function delete(string $key): bool
+    {
+        return true;
+    }
+
+    private function createMockItem(): ItemInterface
+    {
+        return new class implements ItemInterface {
+            public function getKey(): string { return 'test'; }
+            public function get(): mixed { return null; }
+            public function isHit(): bool { return false; }
+            public function set(mixed $value): static { return $this; }
+            public function expiresAt(?\DateTimeInterface $expiration): static { return $this; }
+            public function expiresAfter(int|\DateInterval|null $time): static { return $this; }
+            public function tag(iterable|string $tags): static { return $this; }
+            /** @return array<string, mixed> */
+            public function getMetadata(): array { return []; }
+        };
+    }
 }
\ No newline at end of file