{
  writeShellScriptBin,
  direnv,
  python3,
  lib,
  coreutils,
  gnugrep,
  nixVersions,
  nixVersion,
}:
writeShellScriptBin "test-runner-${nixVersion}" ''
  set -e
  export PATH=${
    lib.makeBinPath [
      direnv
      nixVersions.${nixVersion}
      coreutils
      gnugrep
    ]
  }

  echo run unittest
  ${lib.getExe' python3.pkgs.pytest "pytest"} .
''