Cannot assign null to property Nette\Caching\Storages\SQLiteJournal::$pdo of type PDO when running tests #37

Hello,

after upgrading to the newest version of Nette caching library and running codeception tests I now get the following error:
Cannot assign null to property Nette\Caching\Storages\SQLiteJournal::$pdo of type PDO right after the tests are finished.

This looks to be an issue with the latest Nette\Caching commit here which does no longer allow the $pdo property to be nullable.

Detailed error stacktrace:

I switched to a prior version without that commit (Nette\Caching v3.1.4) and the error no longer appears. Can we get this fixed please, so that we can use the newest Nette\Caching version?

Thanks!