old_contents: import sys
  sys.path.append("..")
  
  import overrides_hack
  
  from .exfat_test import *
  from .ext_test import *
  from .f2fs_test import *
  from .generic_test import *
  from .mount_test import *
  from .nilfs_test import *
  from .ntfs_test import *
  from .reiserfs_test import *
  from .vfat_test import *
  from .xfs_test import *
  
new_contents: import sys
  sys.path.append("..")
  
  import overrides_hack
  
  from .exfat_test import *
  from .ext_test import *
  from .f2fs_test import *
  from .generic_test import *
  from .mount_test import *
  from .nilfs_test import *
  from .ntfs_test import *
  from .reiserfs_test import *
  from .vfat_test import *
  from .xfs_test import *
  from .btrfs_test import *
  
subject: Include btrfs_test in tests/fs_tests/__init__.py