when running the test suite we sometimes get numeric values for example:
```

195) PHPCR\Tests\NodeTypeManagement\NodeTypeTest::testPrimaryItem
Exception: DateTime::__construct(): Failed to parse time string (1) at position 0 (1): Unexpected character

/Users/lsmith/htdocs/cmf-sandbox/vendor/jackalope/jackalope-doctrine-dbal/src/Jackalope/Transport/DoctrineDBAL/Client.php:718
/Users/lsmith/htdocs/cmf-sandbox/vendor/jackalope/jackalope-doctrine-dbal/src/Jackalope/Transport/DoctrineDBAL/Client.php:880
/Users/lsmith/htdocs/cmf-sandbox/vendor/jackalope/jackalope-doctrine-dbal/src/Jackalope/Transport/DoctrineDBAL/Client.php:928
/Users/lsmith/htdocs/cmf-sandbox/vendor/jackalope/jackalope-doctrine-dbal/vendor/jackalope/jackalope/src/Jackalope/ObjectManager.php:279
/Users/lsmith/htdocs/cmf-sandbox/vendor/jackalope/jackalope-doctrine-dbal/vendor/jackalope/jackalope/src/Jackalope/Node.php:597
/Users/lsmith/htdocs/cmf-sandbox/vendor/jackalope/jackalope-doctrine-dbal/vendor/phpcr/phpcr-api-tests/inc/BaseCase.php:192
/Users/lsmith/htdocs/cmf-sandbox/vendor/jackalope/jackalope-doctrine-dbal/vendor/phpcr/phpcr-api-tests/inc/BaseCase.php:159
/Users/lsmith/htdocs/cmf-sandbox/vendor/jackalope/jackalope-doctrine-dbal/vendor/phpcr/phpcr-api-tests/tests/19_NodeTypeManagement/NodeTypeBaseCase.php:30
```

not sure why this is the case and if this is correct or not ..