correct error in running test:
correct error in running test:

Matthias\SymfonyServiceDefinitionValidator\Functional\FunctionalTest::testIfTheServiceDefinitionsAreCorrectTheContainerWillBeCompiled
Symfony\Component\DependencyInjection\Exception\InvalidArgumentException: Invalid key "dsn" found in arguments of method "__construct()" for service "pdo": only integer or $named arguments are allowed.

matthiasnoback/symfony-service-definition-validator