$ ansible --version
ansible 2.1.0 (devel 14f3739260)

---
- hosts: windows
  remote_user: vagrant
  handlers:
          - name: handlers test
            win_ping:
  tasks:
          - name: ping
            win_ping:
            changed_when: True
            notify: handlers test

[windows]
192.168.33.100

[windows:vars]
ansible_user=vagrant
ansible_password=vagrant
ansible_port=5986
ansible_connection=winrm

PLAY ***************************************************************************

TASK [setup] *******************************************************************
ok: [192.168.33.100]

TASK [ping] ********************************************************************
changed: [192.168.33.100]

RUNNING HANDLER [handlers test] ************************************************
fatal: [192.168.33.100]: UNREACHABLE! => {"changed": false, "msg": "ERROR! SSH encountered an unknown error during the connection. We recommend you re-run the command using -vvvv, which will enable SSH debugging output to help diagnose the issue", "unreachable": true}

PLAY RECAP *********************************************************************
192.168.33.100             : ok=2    changed=1    unreachable=1    failed=0

RUNNING HANDLER [handlers test] ************************************************
<192.168.33.100> ESTABLISH SSH CONNECTION FOR USER: vagrant
<192.168.33.100> SSH: EXEC ssh -C -vvv -o ControlMaster=auto -o ControlPersist=60s -o StrictHostKeyChecking=no -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o User=vagrant -o ConnectTimeout=10 -o ControlPath=/home/nakagawa/.ansible/cp/ansible-ssh-%h-%p-%r -tt 192.168.33.100 '( umask 22 && mkdir -p "$( echo $HOME/.ansible/tmp/ansible-tmp-1449930524.88-211750385473219 )" && echo "$( echo $HOME/.ansible/tmp/ansible-tmp-1449930524.88-211750385473219 )" )'
fatal: [192.168.33.100]: UNREACHABLE! => {"changed": false, "msg": "ERROR! SSH encountered an unknown error. The output was:\nOpenSSH_6.6.1, OpenSSL 1.0.1f 6 Jan 2014\r\ndebug1: Reading configuration data /etc/ssh/ssh_config\r\ndebug1: /etc/ssh/ssh_config line 19: Applying options for *\r\ndebug1: auto-mux: Trying existing master\r\ndebug1: Control socket \"/home/nakagawa/.ansible/cp/ansible-ssh-192.168.33.100-22-vagrant\" does not exist\r\ndebug2: ssh_connect: needpriv 0\r\ndebug1: Connecting to 192.168.33.100 [192.168.33.100] port 22.\r\ndebug2: fd 3 setting O_NONBLOCK\r\ndebug1: connect to address 192.168.33.100 port 22: Connection timed out\r\nssh: connect to host 192.168.33.100 port 22: Connection timed out\r\n", "unreachable": true}