- arvtool = arvados_cwl.ArvadosCommandTool(runner, tool, work_api="jobs", avsc_names=avsc_names, basedir="", make_fs_access=make_fs_access)
+ arvtool = arvados_cwl.ArvadosCommandTool(runner, tool, work_api="jobs", avsc_names=avsc_names,
+ basedir="", make_fs_access=make_fs_access, loader=Loader({}))