diff --git a/composer.json b/composer.json
index 1804c4c..0a6d7ed 100644
--- a/composer.json
+++ b/composer.json
@@ -11,10 +11,13 @@
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         "symfony/dotenv": "4.4.*",
         "symfony/flex": "^1.3.1",
         "symfony/framework-bundle": "4.4.*",
+        "symfony/psr-http-message-bridge": "^2.0",
         "symfony/serializer": "4.4.*",
         "symfony/yaml": "4.4.*",
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diff --git a/composer.lock b/composer.lock
index 1d1f029..dc276b6 100644
--- a/composer.lock
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+                }
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+            "license": [
+                "MIT"
+            ],
+            "authors": [
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+                    "name": "Beau Simensen",
+                    "email": "beau@dflydev.com"
+                }
+            ],
+            "description": "Cookies for PSR-7 HTTP Message Interface.",
+            "keywords": [
+                "cookies",
+                "psr-7",
+                "psr7"
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+            "support": {
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@@ -1066,6 +1191,424 @@
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+                    "email": "mark.sagikazar@gmail.com"
+                }
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+            "description": "Factory interfaces for PSR-7 HTTP Message",
+            "homepage": "http://php-http.org",
+            "keywords": [
+                "factory",
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@@ -1210,6 +1753,61 @@
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+                "message",
+                "psr",
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+            "support": {
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             "name": "psr/http-message",
             "version": "1.0.1",
@@ -1260,6 +1858,120 @@
             ],
             "time": "2016-08-06T14:39:51+00:00"
         },
+        {
+            "name": "psr/http-server-handler",
+            "version": "1.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/http-server-handler.git",
+                "reference": "aff2f80e33b7f026ec96bb42f63242dc50ffcae7"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/php-fig/http-server-handler/zipball/aff2f80e33b7f026ec96bb42f63242dc50ffcae7",
+                "reference": "aff2f80e33b7f026ec96bb42f63242dc50ffcae7",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.0",
+                "psr/http-message": "^1.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psr\\Http\\Server\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "http://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interface for HTTP server-side request handler",
+            "keywords": [
+                "handler",
+                "http",
+                "http-interop",
+                "psr",
+                "psr-15",
+                "psr-7",
+                "request",
+                "response",
+                "server"
+            ],
+            "support": {
+                "issues": "https://github.com/php-fig/http-server-handler/issues",
+                "source": "https://github.com/php-fig/http-server-handler/tree/master"
+            },
+            "time": "2018-10-30T16:46:14+00:00"
+        },
+        {
+            "name": "psr/http-server-middleware",
+            "version": "1.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/http-server-middleware.git",
+                "reference": "2296f45510945530b9dceb8bcedb5cb84d40c5f5"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/php-fig/http-server-middleware/zipball/2296f45510945530b9dceb8bcedb5cb84d40c5f5",
+                "reference": "2296f45510945530b9dceb8bcedb5cb84d40c5f5",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.0",
+                "psr/http-message": "^1.0",
+                "psr/http-server-handler": "^1.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psr\\Http\\Server\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "http://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interface for HTTP server-side middleware",
+            "keywords": [
+                "http",
+                "http-interop",
+                "middleware",
+                "psr",
+                "psr-15",
+                "psr-7",
+                "request",
+                "response"
+            ],
+            "support": {
+                "issues": "https://github.com/php-fig/http-server-middleware/issues",
+                "source": "https://github.com/php-fig/http-server-middleware/tree/master"
+            },
+            "time": "2018-10-30T17:12:04+00:00"
+        },
         {
             "name": "psr/log",
             "version": "1.1.3",
@@ -1347,6 +2059,129 @@
             "description": "A polyfill for getallheaders.",
             "time": "2019-03-08T08:55:37+00:00"
         },
+        {
+            "name": "respect/validation",
+            "version": "1.1.31",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/Respect/Validation.git",
+                "reference": "45d109fc830644fecc1145200d6351ce4f2769d0"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/Respect/Validation/zipball/45d109fc830644fecc1145200d6351ce4f2769d0",
+                "reference": "45d109fc830644fecc1145200d6351ce4f2769d0",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.4",
+                "symfony/polyfill-mbstring": "^1.2"
+            },
+            "require-dev": {
+                "egulias/email-validator": "~1.2 || ~2.1",
+                "mikey179/vfsstream": "^1.5",
+                "phpunit/phpunit": "~4.0 || ~5.0",
+                "symfony/validator": "~2.6.9",
+                "zendframework/zend-validator": "~2.3"
+            },
+            "suggest": {
+                "egulias/email-validator": "Strict (RFC compliant) email validation",
+                "ext-bcmath": "Arbitrary Precision Mathematics",
+                "ext-mbstring": "Multibyte String Functions",
+                "friendsofphp/php-cs-fixer": "Fix PSR2 and other coding style issues",
+                "symfony/validator": "Use Symfony validator through Respect\\Validation",
+                "zendframework/zend-validator": "Use Zend Framework validator through Respect\\Validation"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.1-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Respect\\Validation\\": "library/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Respect/Validation Contributors",
+                    "homepage": "https://github.com/Respect/Validation/graphs/contributors"
+                }
+            ],
+            "description": "The most awesome validation engine ever created for PHP",
+            "homepage": "http://respect.github.io/Validation/",
+            "keywords": [
+                "respect",
+                "validation",
+                "validator"
+            ],
+            "support": {
+                "issues": "https://github.com/Respect/Validation/issues",
+                "source": "https://github.com/Respect/Validation/tree/1.1.31"
+            },
+            "time": "2019-05-28T06:10:06+00:00"
+        },
+        {
+            "name": "riverline/multipart-parser",
+            "version": "2.0.8",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/Riverline/multipart-parser.git",
+                "reference": "2fe9026789754c1ff07c06047f0acc113e90933a"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/Riverline/multipart-parser/zipball/2fe9026789754c1ff07c06047f0acc113e90933a",
+                "reference": "2fe9026789754c1ff07c06047f0acc113e90933a",
+                "shasum": ""
+            },
+            "require": {
+                "ext-mbstring": "*",
+                "php": ">=5.6.0"
+            },
+            "require-dev": {
+                "laminas/laminas-diactoros": "^1.8.7",
+                "phpunit/phpunit": "^5.2 || ^6.0 || ^7.0",
+                "psr/http-message": "^1.0",
+                "symfony/psr-http-message-bridge": "^1.1"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Riverline\\MultiPartParser\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Romain Cambien",
+                    "email": "romain@cambien.net"
+                },
+                {
+                    "name": "Riverline",
+                    "homepage": "http://www.riverline.fr"
+                }
+            ],
+            "description": "One class library to parse multipart content with encoding and charset support.",
+            "keywords": [
+                "http",
+                "multipart",
+                "parser"
+            ],
+            "support": {
+                "issues": "https://github.com/Riverline/multipart-parser/issues",
+                "source": "https://github.com/Riverline/multipart-parser/tree/2.0.8"
+            },
+            "time": "2020-01-24T09:39:24+00:00"
+        },
         {
             "name": "symfony/cache",
             "version": "v4.4.15",
@@ -3389,6 +4224,88 @@
             ],
             "time": "2020-07-14T12:35:20+00:00"
         },
+        {
+            "name": "symfony/psr-http-message-bridge",
+            "version": "v2.0.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/psr-http-message-bridge.git",
+                "reference": "51a21cb3ba3927d4b4bf8f25cc55763351af5f2e"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/psr-http-message-bridge/zipball/51a21cb3ba3927d4b4bf8f25cc55763351af5f2e",
+                "reference": "51a21cb3ba3927d4b4bf8f25cc55763351af5f2e",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.1",
+                "psr/http-message": "^1.0",
+                "symfony/http-foundation": "^4.4 || ^5.0"
+            },
+            "require-dev": {
+                "nyholm/psr7": "^1.1",
+                "symfony/phpunit-bridge": "^4.4 || ^5.0"
+            },
+            "suggest": {
+                "nyholm/psr7": "For a super lightweight PSR-7/17 implementation"
+            },
+            "type": "symfony-bridge",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.0-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Bridge\\PsrHttpMessage\\": ""
+                },
+                "exclude-from-classmap": [
+                    "/Tests/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "http://symfony.com/contributors"
+                }
+            ],
+            "description": "PSR HTTP message bridge",
+            "homepage": "http://symfony.com",
+            "keywords": [
+                "http",
+                "http-message",
+                "psr-17",
+                "psr-7"
+            ],
+            "support": {
+                "issues": "https://github.com/symfony/psr-http-message-bridge/issues",
+                "source": "https://github.com/symfony/psr-http-message-bridge/tree/v2.0.2"
+            },
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2020-09-29T08:17:46+00:00"
+        },
         {
             "name": "symfony/routing",
             "version": "v4.4.15",
@@ -7262,5 +8179,5 @@
     "platform-overrides": {
         "php": "7.4.3"
     },
-    "plugin-api-version": "1.1.0"
+    "plugin-api-version": "2.0.0"
 }
diff --git a/config/packages/nyholm_psr7.yaml b/config/packages/nyholm_psr7.yaml
new file mode 100644
index 0000000..f135723
--- /dev/null
+++ b/config/packages/nyholm_psr7.yaml
@@ -0,0 +1,21 @@
+services:
+    # Register nyholm/psr7 services for autowiring with PSR-17 (HTTP factories)
+    Psr\Http\Message\RequestFactoryInterface: '@nyholm.psr7.psr17_factory'
+    Psr\Http\Message\ResponseFactoryInterface: '@nyholm.psr7.psr17_factory'
+    Psr\Http\Message\ServerRequestFactoryInterface: '@nyholm.psr7.psr17_factory'
+    Psr\Http\Message\StreamFactoryInterface: '@nyholm.psr7.psr17_factory'
+    Psr\Http\Message\UploadedFileFactoryInterface: '@nyholm.psr7.psr17_factory'
+    Psr\Http\Message\UriFactoryInterface: '@nyholm.psr7.psr17_factory'
+
+    # Register nyholm/psr7 services for autowiring with HTTPlug factories
+    Http\Message\MessageFactory: '@nyholm.psr7.httplug_factory'
+    Http\Message\RequestFactory: '@nyholm.psr7.httplug_factory'
+    Http\Message\ResponseFactory: '@nyholm.psr7.httplug_factory'
+    Http\Message\StreamFactory: '@nyholm.psr7.httplug_factory'
+    Http\Message\UriFactory: '@nyholm.psr7.httplug_factory'
+
+    nyholm.psr7.psr17_factory:
+        class: Nyholm\Psr7\Factory\Psr17Factory
+
+    nyholm.psr7.httplug_factory:
+        class: Nyholm\Psr7\Factory\HttplugFactory
diff --git a/config/services.yaml b/config/services.yaml
index 9757656..0e01b06 100644
--- a/config/services.yaml
+++ b/config/services.yaml
@@ -42,3 +42,17 @@ services:
         arguments:
             $client: '@guzzle.accuweather'
             $apiKey: '%env(ACCUWEATHER_API_KEY)%'
+
+    Symfony\Bridge\PsrHttpMessage\HttpMessageFactoryInterface:
+        class: Symfony\Bridge\PsrHttpMessage\Factory\PsrHttpFactory
+
+    League\OpenAPIValidation\PSR7\ValidatorBuilder: ~
+
+    openapi.validatorbuilder:
+        class: League\OpenAPIValidation\PSR7\ValidatorBuilder
+        factory: ['@League\OpenAPIValidation\PSR7\ValidatorBuilder', 'fromYamlFile']
+        arguments:
+            - "%kernel.project_dir%/docs/openapi.yml"
+
+    League\OpenAPIValidation\PSR7\RequestValidator:
+        factory: ['@openapi.validatorbuilder', 'getRequestValidator']
diff --git a/features/bootstrap/FeatureContext.php b/features/bootstrap/FeatureContext.php
index 1a016bf..82aa91f 100644
--- a/features/bootstrap/FeatureContext.php
+++ b/features/bootstrap/FeatureContext.php
@@ -48,8 +48,9 @@ public function currentTemperatureIs($temperature)
      */
     public function iRegisterARunningSessionWith($id, $distance, $shoes)
     {
+        $server = ['CONTENT_TYPE' => 'application/json'];
         $body = RegisterRunningSessionDeserializerTest::createBody($id, $distance, $shoes);
-        $request = Request::create('/runningsessions/'.$id, 'PUT', [], [], [], [], $body);
+        $request = Request::create('/runningsessions/'.$id, 'PUT', [], [], [], $server, $body);
 
         $this->response = $this->kernel->handle($request);
     }
diff --git a/src/Infrastructure/Symfony/Controller/OpenapiRequestValidator.php b/src/Infrastructure/Symfony/Controller/OpenapiRequestValidator.php
new file mode 100644
index 0000000..ced3ac4
--- /dev/null
+++ b/src/Infrastructure/Symfony/Controller/OpenapiRequestValidator.php
@@ -0,0 +1,41 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Infrastructure\Symfony\Controller;
+
+use League\OpenAPIValidation\PSR7\Exception\ValidationFailed;
+use League\OpenAPIValidation\PSR7\RequestValidator;
+use Symfony\Bridge\PsrHttpMessage\HttpMessageFactoryInterface;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
+
+class OpenapiRequestValidator
+{
+    private HttpMessageFactoryInterface $psr7Factory;
+    private RequestValidator $requestValidator;
+
+    public function __construct(
+        HttpMessageFactoryInterface $psr7Factory,
+        RequestValidator $requestValidator
+    ) {
+        $this->psr7Factory = $psr7Factory;
+        $this->requestValidator = $requestValidator;
+    }
+
+    /**
+     * @throws BadRequestHttpException
+     */
+    public function validateRequest(Request $symfonyRequest): void
+    {
+        $psr7Request = $this->psr7Factory->createRequest($symfonyRequest);
+
+        try {
+            $this->requestValidator->validate($psr7Request);
+        } catch (ValidationFailed $e) {
+            //Real cause in previous
+            $e = $e->getPrevious() ?: $e;
+            throw new BadRequestHttpException($e->getMessage(), $e);
+        }
+    }
+}
diff --git a/src/Infrastructure/Symfony/Controller/RunningSessionController.php b/src/Infrastructure/Symfony/Controller/RunningSessionController.php
index e71257b..e5674ce 100644
--- a/src/Infrastructure/Symfony/Controller/RunningSessionController.php
+++ b/src/Infrastructure/Symfony/Controller/RunningSessionController.php
@@ -16,15 +16,18 @@
 
 class RunningSessionController extends AbstractController
 {
+    private OpenapiRequestValidator $requestValidator;
     private RegisterRunningSessionDeserializer $commandDeserializer;
     private RunningSessionSerializer $responseSerializer;
     private RegisterRunningSessionHandler $registerRunningSessionHandler;
 
     public function __construct(
+        OpenapiRequestValidator $requestValidator,
         RegisterRunningSessionDeserializer $commandDeserializer,
         RunningSessionSerializer $responseSerializer,
         RegisterRunningSessionHandler $registerRunningSessionHandler
     ) {
+        $this->requestValidator = $requestValidator;
         $this->commandDeserializer = $commandDeserializer;
         $this->responseSerializer = $responseSerializer;
         $this->registerRunningSessionHandler = $registerRunningSessionHandler;
@@ -35,6 +38,8 @@ public function __construct(
      */
     public function put(string $id, Request $request): Response
     {
+        $this->requestValidator->validateRequest($request);
+
         $command = $this->commandDeserializer->deserialize($request->getContent());
         Assert::same($command->getId(), (int) $id, 'id must be the same in payload and uri');
 
diff --git a/src/Infrastructure/Symfony/Serializer/RegisterRunningSessionDeserializer.php b/src/Infrastructure/Symfony/Serializer/RegisterRunningSessionDeserializer.php
index 5150f62..4797e7b 100644
--- a/src/Infrastructure/Symfony/Serializer/RegisterRunningSessionDeserializer.php
+++ b/src/Infrastructure/Symfony/Serializer/RegisterRunningSessionDeserializer.php
@@ -10,7 +10,6 @@ class RegisterRunningSessionDeserializer
 {
     public function deserialize($content): RegisterRunningSession
     {
-        //@todo : validate data against json schema
         $data = json_decode($content, true, 512, JSON_THROW_ON_ERROR);
 
         return new RegisterRunningSession(
diff --git a/symfony.lock b/symfony.lock
index d6c772a..9d1f98d 100644
--- a/symfony.lock
+++ b/symfony.lock
@@ -23,12 +23,18 @@
     "behat/transliterator": {
         "version": "v1.3.0"
     },
+    "cebe/php-openapi": {
+        "version": "1.4.2"
+    },
     "composer/semver": {
         "version": "1.7.1"
     },
     "composer/xdebug-handler": {
         "version": "1.4.3"
     },
+    "dflydev/fig-cookies": {
+        "version": "v2.0.1"
+    },
     "doctrine/annotations": {
         "version": "1.0",
         "recipe": {
@@ -104,6 +110,18 @@
     "guzzlehttp/psr7": {
         "version": "1.7.0"
     },
+    "justinrainbow/json-schema": {
+        "version": "5.2.10"
+    },
+    "league/openapi-psr7-validator": {
+        "version": "0.13"
+    },
+    "league/uri": {
+        "version": "6.3.0"
+    },
+    "league/uri-interfaces": {
+        "version": "2.2.0"
+    },
     "myclabs/deep-copy": {
         "version": "1.10.1"
     },
@@ -122,6 +140,18 @@
     "nikic/php-parser": {
         "version": "v4.10.2"
     },
+    "nyholm/psr7": {
+        "version": "1.0",
+        "recipe": {
+            "repo": "github.com/symfony/recipes",
+            "branch": "master",
+            "version": "1.0",
+            "ref": "7c0a9352a57376f04f5444e74565102c3a23d0c7"
+        },
+        "files": [
+            "config/packages/nyholm_psr7.yaml"
+        ]
+    },
     "phar-io/manifest": {
         "version": "2.0.1"
     },
@@ -134,6 +164,9 @@
     "php-cs-fixer/diff": {
         "version": "v1.3.1"
     },
+    "php-http/message-factory": {
+        "version": "v1.0.2"
+    },
     "phpdocumentor/reflection-common": {
         "version": "2.2.0"
     },
@@ -187,15 +220,30 @@
     "psr/http-client": {
         "version": "1.0.1"
     },
+    "psr/http-factory": {
+        "version": "1.0.1"
+    },
     "psr/http-message": {
         "version": "1.0.1"
     },
+    "psr/http-server-handler": {
+        "version": "1.0.1"
+    },
+    "psr/http-server-middleware": {
+        "version": "1.0.1"
+    },
     "psr/log": {
         "version": "1.1.3"
     },
     "ralouphie/getallheaders": {
         "version": "3.0.3"
     },
+    "respect/validation": {
+        "version": "1.1.31"
+    },
+    "riverline/multipart-parser": {
+        "version": "2.0.8"
+    },
     "sebastian/cli-parser": {
         "version": "1.0.1"
     },
@@ -377,6 +425,9 @@
     "symfony/process": {
         "version": "v4.4.15"
     },
+    "symfony/psr-http-message-bridge": {
+        "version": "v2.0.2"
+    },
     "symfony/routing": {
         "version": "4.2",
         "recipe": {
diff --git a/tests/Infrastructure/Symfony/Controller/RunningSessionControllerTest.php b/tests/Infrastructure/Symfony/Controller/RunningSessionControllerTest.php
index 44e556e..4902bfe 100644
--- a/tests/Infrastructure/Symfony/Controller/RunningSessionControllerTest.php
+++ b/tests/Infrastructure/Symfony/Controller/RunningSessionControllerTest.php
@@ -37,8 +37,11 @@ public function testPutRouteSendsCommandToHandlerAndDisplayItsResult()
         $this->givenHandlerResponseIsARunningSession();
 
         //When (Act)
+        $server = ['CONTENT_TYPE' => 'application/json'];
         $body = RegisterRunningSessionDeserializerTest::createBody(42);
-        $response = $this->whenISendThisRequest(Request::create('/runningsessions/42', 'PUT', [], [], [], [], $body));
+        $response = $this->whenISendThisRequest(
+            Request::create('/runningsessions/42', 'PUT', [], [], [], $server, $body)
+        );
 
         //Then (Assert)
         //less strict assertion (type only): see RegisterRunningSessionDeserializer for conversion from json to command object
@@ -49,6 +52,21 @@ public function testPutRouteSendsCommandToHandlerAndDisplayItsResult()
         self::assertSame('application/json', $response->headers->get('Content-Type'));
     }
 
+    public function testPutRouteReturns400IfInvalidBody()
+    {
+        //When (Act)
+        $server = ['CONTENT_TYPE' => 'application/json'];
+        $body = '{"unexpected": "body"}';
+        $response = $this->whenISendThisRequest(
+            Request::create('/runningsessions/42', 'PUT', [], [], [], $server, $body),
+            $letSymfonyConvertExceptions = true
+        );
+
+        //Then (Assert)
+        self::assertSame(400, $response->getStatusCode());
+        self::assertSame('application/json', $response->headers->get('Content-Type'));
+    }
+
     private function givenHandlerResponseIsARunningSession()
     {
         $this->registerRunningSessionHandler
@@ -56,10 +74,10 @@ private function givenHandlerResponseIsARunningSession()
             ->willReturn(RunningSessionFactory::create());
     }
 
-    private function whenISendThisRequest(Request $request): Response
+    private function whenISendThisRequest(Request $request, $letSymfonyConvertExceptions = false): Response
     {
         //$catch=false: prevents Symfony from catching exceptions
-        return self::$kernel->handle($request, HttpKernelInterface::MASTER_REQUEST, false);
+        return self::$kernel->handle($request, HttpKernelInterface::MASTER_REQUEST, $letSymfonyConvertExceptions);
     }
 
     private function thenARegisterRunningSessionCommandHasBeenSentToHandler()