There were 6 errors:

1) phpbb_installer_database_helper_test::test_validate_table_prefix with data set #0 (true, 'phpbb_')

phpbb\install\exception\invalid_dbms_exception:

C:\Users\Marc\Documents\Entwicklung\phpbb\phpBB\phpbb\install\helper\database.php:294

C:\Users\Marc\Documents\Entwicklung\phpbb\tests\installer\database_helper_test.php:59

2) phpbb_installer_database_helper_test::test_validate_table_prefix with data set #1 (true, 'phpbb')

phpbb\install\exception\invalid_dbms_exception:

C:\Users\Marc\Documents\Entwicklung\phpbb\phpBB\phpbb\install\helper\database.php:294

C:\Users\Marc\Documents\Entwicklung\phpbb\tests\installer\database_helper_test.php:59

3) phpbb_installer_database_helper_test::test_validate_table_prefix with data set #2 (array(array('INST_ERR_DB_INVALID_PREFIX')), '1hpbb_')

phpbb\install\exception\invalid_dbms_exception:

C:\Users\Marc\Documents\Entwicklung\phpbb\phpBB\phpbb\install\helper\database.php:294

C:\Users\Marc\Documents\Entwicklung\phpbb\tests\installer\database_helper_test.php:59

4) phpbb_installer_database_helper_test::test_validate_table_prefix with data set #3 (array(array('INST_ERR_DB_INVALID_PREFIX')), '?hpbb_')

phpbb\install\exception\invalid_dbms_exception:

C:\Users\Marc\Documents\Entwicklung\phpbb\phpBB\phpbb\install\helper\database.php:294

C:\Users\Marc\Documents\Entwicklung\phpbb\tests\installer\database_helper_test.php:59

5) phpbb_installer_database_helper_test::test_validate_table_prefix with data set #4 (array(array(array('INST_ERR_PREFIX_TOO_LONG', 200))), 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA')

phpbb\install\exception\invalid_dbms_exception:

C:\Users\Marc\Documents\Entwicklung\phpbb\phpBB\phpbb\install\helper\database.php:294

C:\Users\Marc\Documents\Entwicklung\phpbb\tests\installer\database_helper_test.php:59

6) phpbb_installer_database_helper_test::test_validate_table_prefix with data set #5 (array(array('INST_ERR_DB_INVALID_PREFIX'), array(array('INST_ERR_PREFIX_TOO_LONG', 200))), '_AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA')

phpbb\install\exception\invalid_dbms_exception:

C:\Users\Marc\Documents\Entwicklung\phpbb\phpBB\phpbb\install\helper\database.php:294

C:\Users\Marc\Documents\Entwicklung\phpbb\tests\installer\database_helper_test.php:59