ansible/test-module produces this result: modify_module() got multiple values for keyword argument 'task_vars'

[sess...@gmail.com]

I used the test-module script to debug modules in ansible but i am getting a strange error:

1 Here is the example i followed: 

https://ansible-manual.readthedocs.io/en/stable-2.2/developing_modules.html

2. 

So i executed this command

ansible/hacking/test-module -I ansible_python_interpreter=/usr/bin/python -m ./custom_modules/timetest.py 

BUT I am getting this error :

[vagrant@db3 vagrant]$ ansible/hacking/test-module -I ansible_python_interpreter=/usr/bin/python -m ./custom_modules/timetest.py 

Traceback (most recent call last):

  File "ansible/hacking/test-module", line 270, in <module>

    main()

  File "ansible/hacking/test-module", line 251, in main

    (modfile, modname, module_style) = boilerplate_module(options.module_path, options.module_args, interpreters, options.check, options.filename)

  File "ansible/hacking/test-module", line 154, in boilerplate_module

    task_vars=task_vars

TypeError: modify_module() got multiple values for keyword argument 'task_vars'

Here is details my ansible 

[vagrant@db3 vagrant]$ ansible --version

ansible 2.5.0

  config file = /etc/ansible/ansible.cfg

  configured module search path = [u'/home/vagrant/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']

  ansible python module location = /usr/lib/python2.7/site-packages/ansible

  executable location = /usr/bin/ansible

  python version = 2.7.5 (default, Aug  4 2017, 00:39:18) [GCC 4.8.5 20150623 (Red Hat 4.8.5-16)]

When i checked the modify_module function in module_common.py i see that task_vars is in position 4

def modify_module(module_name, module_path, module_args, task_vars=None, templar=None, module_compression='ZIP_STORED', async_timeout=0, become=False,
                  become_method=None, become_user=None, become_password=None, become_flags=None, environment=None):

but when it is used in the test-module it is not on position 4  but Templar is:

    (module_data, module_style, shebang) = module_common.modify_module(

        modname,

        modfile,

        complex_args,

        Templar(loader=loader),

        task_vars=task_vars

    )

Please is this a bug? and if it is, how to make this work?

Regards,
Sessy