There were 2 errors:
1) ZendTest\Db\RowGateway\AbstractRowGatewayTest::testDelete
Trying to access array offset on value of type null
/dev/shm/BUILDROOT/php-zendframework-zend-db-2.10.0-2.fc29.remi.x86_64/usr/share/php/Zend/Db/RowGateway/AbstractRowGateway.php:207
/dev/shm/BUILD/zend-db-77022f06f6ffd384fa86d22ab8d8bbdb925a1e8e/test/unit/RowGateway/AbstractRowGatewayTest.php:257
2) ZendTest\Db\TableGateway\AbstractTableGatewayTest::testSelectWithNoWhere
Trying to access array offset on value of type null
/dev/shm/BUILDROOT/php-zendframework-zend-db-2.10.0-2.fc29.remi.x86_64/usr/share/php/Zend/Db/TableGateway/AbstractTableGateway.php:219
/dev/shm/BUILDROOT/php-zendframework-zend-db-2.10.0-2.fc29.remi.x86_64/usr/share/php/Zend/Db/TableGateway/AbstractTableGateway.php:208
/dev/shm/BUILDROOT/php-zendframework-zend-db-2.10.0-2.fc29.remi.x86_64/usr/share/php/Zend/Db/TableGateway/AbstractTableGateway.php:196
/dev/shm/BUILD/zend-db-77022f06f6ffd384fa86d22ab8d8bbdb925a1e8e/test/unit/TableGateway/AbstractTableGatewayTest.php:163
With 7.4.0RC3