Problematic tests list (18 rows):
bugs.core_2484_test  Success message when connecting to tiny trash database file
bugs.core_4374_test  Truncation error when using EXECUTE STATEMENT with a blob
bugs.core_4468_test  FB3: CREATE USER GRANT ADMIN ROLE does not work
bugs.core_4806_test  Regression: generators can be seen/modified by unprivileged users
bugs.core_4831_test  Revoke all on all from role <R> -- failed with "SQL role <R> does not exist in security database"
bugs.core_4839_test  SHOW GRANTS does not display info about exceptions which were granted to user
bugs.core_5236_test  IN/ANY/ALL predicates may cause sub-optimal (late filtering) execution of joins
bugs.core_5637_test  string right truncation on restore of security db
bugs.core_5973_test  Handling FP overflow in double precision value when converting from decfloat
bugs.gh_0310_test  System table with keywords
bugs.gh_6416_test  Engine cant determine datatype in SQL: Unknown SQL Data type (32752) [CORE6168]
bugs.gh_6910_test  Add way to retrieve statement BLR with Statement::getInfo and ISQL's SET EXEC_PATH_DISPLAY BLR
bugs.gh_6935_test  SQL SECURITY DEFINER has inconsistent behaviour if the object owner is non-privileged
bugs.gh_7506_test  Reduce output of the SHOW GRANTS command
bugs.gh_7611_test  Can't backup/restore database from v3 to v4 with SEC$USER_NAME field longer than 10 characters.
bugs.gh_8223_test  SubQueryConversion = true: error "no current record for fetch operation" with complex joins
functional.services.test_user_management  Check ability to make connect to FB services and add/drop user
functional.tabloid.test_3b372197  built-in functions UNICODE_CHAR and UNICODE_VAL

This list is the same for:
6.0.0.778 2025.05.07 d735e65a  CS