diff --git a/src/DependencyInjection/Configuration.php b/src/DependencyInjection/Configuration.php
index dbcb293..de36888 100644
--- a/src/DependencyInjection/Configuration.php
+++ b/src/DependencyInjection/Configuration.php
@@ -74,7 +74,7 @@ public function getConfigTreeBuilder(): TreeBuilder
                                     ->scalarNode('name')->isRequired()->end()
                                     ->scalarNode('version')->defaultNull()->end()
                                     ->arrayNode('options')
-                                        ->scalarPrototype()->end()
+                                        ->variablePrototype()->end()
                                     ->end()
                                 ->end()
                             ->end()
@@ -200,7 +200,7 @@ public function getConfigTreeBuilder(): TreeBuilder
                                     ->scalarNode('name')->isRequired()->end()
                                     ->scalarNode('version')->defaultNull()->end()
                                     ->arrayNode('options')
-                                        ->scalarPrototype()->end()
+                                        ->variablePrototype()->end()
                                     ->end()
                                 ->end()
                             ->end()
diff --git a/tests/DependencyInjection/ConfigurationTest.php b/tests/DependencyInjection/ConfigurationTest.php
new file mode 100644
index 0000000..d492a3f
--- /dev/null
+++ b/tests/DependencyInjection/ConfigurationTest.php
@@ -0,0 +1,142 @@
+<?php
+
+namespace PhpLlm\LlmChainBundle\Tests\DependencyInjection;
+
+use PhpLlm\LlmChainBundle\DependencyInjection\Configuration;
+use PhpLlm\LlmChainBundle\DependencyInjection\LlmChainExtension;
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\Attributes\DoesNotPerformAssertions;
+use PHPUnit\Framework\Attributes\UsesClass;
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+
+#[CoversClass(Configuration::class)]
+#[UsesClass(ContainerBuilder::class)]
+#[UsesClass(LlmChainExtension::class)]
+class ConfigurationTest extends TestCase
+{
+    #[DoesNotPerformAssertions]
+    public function testExtensionLoad(): void
+    {
+        $container = new ContainerBuilder();
+        $container->setParameter('kernel.debug', true);
+        $extension = new LlmChainExtension();
+
+        $configs = $this->getFullConfig();
+        $extension->load($configs, $container);
+    }
+
+    /**
+     * @return array<string, mixed>
+     */
+    private function getFullConfig(): array
+    {
+        return [
+            'llm_chain' => [
+                'platform' => [
+                    'anthropic' => [
+                        'api_key' => 'anthropic_key_full',
+                    ],
+                    'azure' => [
+                        'my_azure_instance' => [
+                            'api_key' => 'azure_key_full',
+                            'base_url' => 'https://myazure.openai.azure.com/',
+                            'deployment' => 'gpt-35-turbo',
+                            'api_version' => '2024-02-15-preview',
+                        ],
+                        'another_azure_instance' => [
+                            'api_key' => 'azure_key_2',
+                            'base_url' => 'https://myazure2.openai.azure.com/',
+                            'deployment' => 'gpt-4',
+                            'api_version' => '2024-02-15-preview',
+                        ],
+                    ],
+                    'google' => [
+                        'api_key' => 'google_key_full',
+                    ],
+                    'openai' => [
+                        'api_key' => 'openai_key_full',
+                    ],
+                    'mistral' => [
+                        'api_key' => 'mistral_key_full',
+                    ],
+                    'openrouter' => [
+                        'api_key' => 'openrouter_key_full',
+                    ],
+                ],
+                'chain' => [
+                    'my_chat_chain' => [
+                        'platform' => 'openai_platform_service_id',
+                        'model' => [
+                            'name' => 'gpt',
+                            'version' => 'gpt-3.5-turbo',
+                            'options' => [
+                                'temperature' => 0.7,
+                                'max_tokens' => 150,
+                                'nested' => ['options' => ['work' => 'too']],
+                            ],
+                        ],
+                        'structured_output' => false,
+                        'system_prompt' => 'You are a helpful assistant.',
+                        'include_tools' => true,
+                        'tools' => [
+                            'enabled' => true,
+                            'services' => [
+                                ['service' => 'my_tool_service_id', 'name' => 'myTool', 'description' => 'A test tool'],
+                                'another_tool_service_id', // String format
+                            ],
+                        ],
+                        'fault_tolerant_toolbox' => false,
+                    ],
+                    'another_chain' => [
+                        'model' => ['name' => 'claude', 'version' => 'claude-3-opus-20240229'],
+                        'system_prompt' => 'Be concise.',
+                    ],
+                ],
+                'store' => [
+                    'azure_search' => [
+                        'my_azure_search_store' => [
+                            'endpoint' => 'https://mysearch.search.windows.net',
+                            'api_key' => 'azure_search_key',
+                            'index_name' => 'my-documents',
+                            'api_version' => '2023-11-01',
+                            'vector_field' => 'contentVector',
+                        ],
+                    ],
+                    'chroma_db' => [
+                        'my_chroma_store' => [
+                            'collection' => 'my_collection',
+                        ],
+                    ],
+                    'mongodb' => [
+                        'my_mongo_store' => [
+                            'database' => 'my_db',
+                            'collection' => 'my_collection',
+                            'index_name' => 'vector_index',
+                            'vector_field' => 'embedding',
+                            'bulk_write' => true,
+                        ],
+                    ],
+                    'pinecone' => [
+                        'my_pinecone_store' => [
+                            'namespace' => 'my_namespace',
+                            'filter' => ['category' => 'books'],
+                            'top_k' => 10,
+                        ],
+                    ],
+                ],
+                'indexer' => [
+                    'my_text_indexer' => [
+                        'store' => 'my_azure_search_store_service_id',
+                        'platform' => 'google_platform_service_id',
+                        'model' => [
+                            'name' => 'embeddings',
+                            'version' => 'text-embedding-004',
+                            'options' => ['dimension' => 768],
+                        ],
+                    ],
+                ],
+            ],
+        ];
+    }
+}