following https://registry.hub.docker.com/u/johnsca/charmbox/

» sudo docker run --rm --net=host -v $HOME/.juju:/home/ubuntu/.juju -ti johnsca/charmbox
[sudo] password for sheila:
Unable to find image 'johnsca/charmbox:latest' locally
Pulling repository johnsca/charmbox
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Status: Downloaded newer image for johnsca/charmbox:latest
welcome to juju
ubuntu@yagi:~$ sudo apt-get install python3-yaml
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
  python3-yaml
0 upgraded, 1 newly installed, 0 to remove and 34 not upgraded.
Need to get 92.7 kB of archives.
After this operation, 449 kB of additional disk space will be used.
Get:1 http://archive.ubuntu.com/ubuntu/ trusty-updates/main python3-yaml amd64 3.10-4ubuntu0.1 [92.7 kB]
Fetched 92.7 kB in 0s (125 kB/s)
Selecting previously unselected package python3-yaml.
(Reading database ... 22517 files and directories currently installed.)
Preparing to unpack .../python3-yaml_3.10-4ubuntu0.1_amd64.deb ...
Unpacking python3-yaml (3.10-4ubuntu0.1) ...
Setting up python3-yaml (3.10-4ubuntu0.1) ...
ubuntu@yagi:~$ bundletester -t lp:charms/python-django
python-django
    charm-proof                                                            PASS
    make lint                                                              PASS
    01-dj13                                                                ERROR

------------------------------------------------------------------------------
ERROR: python-django::01-dj13
[/tmp/bundletester-ON81Hu/tmpGzzfoB/tests/01-dj13 exit 1]
2015-04-03 19:22:48,988 INFO (cwd=/tmp/tmpkoizervr) RUN: ['juju-deployer', '-vdWL', '-c', '/tmp/bundletester-ON81Hu/tmpGzzfoB/tests/config/django.yaml', 'django13', '--timeout', '2000']
2015-04-03 19:22:49 [DEBUG] deployer.cli: Using runtime GoEnvironment on local
2015-04-03 19:22:49 [INFO] deployer.cli: Starting deployment of django13
2015-04-03 19:22:49 [DEBUG] deployer.import: Getting charms...
2015-04-03 19:22:49 [DEBUG] deployer.charm: Cache dir /home/ubuntu/.juju/.deployer-store-cache/cs_precise_gunicorn
2015-04-03 19:22:49 [DEBUG] deployer.charm:  Branching charm lp:charmers/precise/python-django @ /home/ubuntu/precise/python-django
2015-04-03 19:22:50 [ERROR] deployer.charm: Could not branch lp:charmers/precise/python-django to /home/ubuntu/precise/python-django

 You have not informed bzr of your Launchpad ID, and you must do this to
write to Launchpad or access private data.  See "bzr help launchpad-login".
bzr: ERROR: Invalid url supplied to transport: "bzr+ssh://bazaar.launchpad.net/+branch/charmers/precise/python-django": no supported schemes

2015-04-03 19:22:50 [INFO] deployer.cli: Deployment stopped. run time: 0.86
ERROR

======================================================================
ERROR: setUpModule (__main__)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/tmp/bundletester-ON81Hu/tmpGzzfoB/tests/01-dj13", line 29, in setUpModule
    timeout=2000)
  File "/tmp/bundletester-ON81Hu/tmpGzzfoB/tests/jujulib/deployer.py", line 42, in deploy
    subprocess.check_call(args, cwd=deployer_dir)
  File "/usr/lib/python3.4/subprocess.py", line 557, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['juju-deployer', '-vdWL', '-c', '/tmp/bundletester-ON81Hu/tmpGzzfoB/tests/config/django.yaml', 'django13', '--timeout', '2000']' returned non-zero exit status 1

----------------------------------------------------------------------
Ran 0 tests in 1.191s

FAILED (errors=1)

PASS: 2 ERROR: 1 SKIP:4 Total: 7 (2.405901 sec)
ubuntu@yagi:~$