• a detailed description of the bug or suggestion
  Command line parsing error with Python 3.8 when concatenating short options
• pytest and operating system versions
  Pytest 5.0.0, Python 3.8.0b1, Windows 10
• minimal example if possible

> pytest -vx
ERROR: usage: pytest [options] [file_or_dir] [file_or_dir] [...]
pytest: error: unrecognized arguments: -vx
  inifile: None
  rootdir: F:\Documents\Scripts\Runscript

pytest -v -x works