$ /usr/lib/postgresql/15/bin/postgres --version
postgres (PostgreSQL) 15.5 (Ubuntu 15.5-1.pgdg22.04+1)

$ python ./tests/test_simple.py 
Traceback (most recent call last):
  File "testgres/env/lib/python3.10/site-packages/testgres/utils.py", line 31, in __init__
    super().__init__(version)
  File "testgres/env/lib/python3.10/site-packages/packaging/version.py", line 200, in __init__
    raise InvalidVersion(f"Invalid version: '{version}'")
packaging.version.InvalidVersion: Invalid version: '15.5-1.pgdg22.04+1)'

    # Remove "(Homebrew)" and "(Ubuntu <version>)" if present
    raw_ver = raw_ver.replace('(Homebrew)', '').strip()
    raw_ver = re.sub('\(Ubuntu[^)]*\)', '', raw_ver).strip()