Ansible: create directory w/relative path

output.txt

PLAY [localhost] **************************************************************

GATHERING FACTS ***************************************************************
<localhost> REMOTE_MODULE setup
<localhost> EXEC ['/bin/sh', '-c', 'mkdir -p $HOME/.ansible/tmp/ansible-tmp-1408122888.66-13421194942965 && echo $HOME/.ansible/tmp/ansible-tmp-1408122888.66-13421194942965']
<localhost> PUT /tmp/tmp5Qho7b TO /root/.ansible/tmp/ansible-tmp-1408122888.66-13421194942965/setup
<localhost> EXEC ['/bin/sh', '-c', u'LANG=en_US.UTF-8 LC_CTYPE=en_US.UTF-8 /usr/bin/python /root/.ansible/tmp/ansible-tmp-1408122888.66-13421194942965/setup; rm -rf /root/.ansible/tmp/ansible-tmp-1408122888.66-13421194942965/ >/dev/null 2>&1']
ok: [localhost]

TASK: [file path=test_dir state=directory] ************************************
<localhost> REMOTE_MODULE file path=test_dir state=directory
<localhost> EXEC ['/bin/sh', '-c', 'mkdir -p $HOME/.ansible/tmp/ansible-tmp-1408122888.84-149829517711453 && echo $HOME/.ansible/tmp/ansible-tmp-1408122888.84-149829517711453']
<localhost> PUT /tmp/tmpQ2jsXO TO /root/.ansible/tmp/ansible-tmp-1408122888.84-149829517711453/file
<localhost> EXEC ['/bin/sh', '-c', u'LANG=en_US.UTF-8 LC_CTYPE=en_US.UTF-8 /usr/bin/python /root/.ansible/tmp/ansible-tmp-1408122888.84-149829517711453/file; rm -rf /root/.ansible/tmp/ansible-tmp-1408122888.84-149829517711453/ >/dev/null 2>&1']
failed: [localhost] => {"failed": true, "path": "test_dir", "state": "absent"}
msg: path test_dir does not exist

FATAL: all hosts have already failed -- aborting

test.yml

---
- hosts: localhost
  tasks:
    - file: path=test_dir state=directory