============================= test session starts ==============================
platform linux -- Python 3.6.6, pytest-3.10.0, py-1.7.0, pluggy-0.8.0 -- /home/travis/miniconda/envs/test-environment/bin/python
cachedir: .pytest_cache
rootdir: /home/travis/build/dask/dask, inifile: setup.cfg
plugins: xdist-1.24.1, forked-0.2
collected 6561 items / 1 errors / 5 skipped                                    
==================================== ERRORS ====================================
_________________ ERROR collecting dask/bytes/tests/test_s3.py _________________
dask/bytes/tests/test_s3.py:10: in <module>
    moto = pytest.importorskip('moto')
../../../miniconda/envs/test-environment/lib/python3.6/site-packages/moto/__init__.py:8: in <module>
    from .acm import mock_acm  # flake8: noqa
../../../miniconda/envs/test-environment/lib/python3.6/site-packages/moto/acm/__init__.py:2: in <module>
    from .models import acm_backends
../../../miniconda/envs/test-environment/lib/python3.6/site-packages/moto/acm/models.py:7: in <module>
    from moto.ec2 import ec2_backends
../../../miniconda/envs/test-environment/lib/python3.6/site-packages/moto/ec2/__init__.py:2: in <module>
    from .models import ec2_backends
../../../miniconda/envs/test-environment/lib/python3.6/site-packages/moto/ec2/models.py:13: in <module>
    import boto.ec2
../../../miniconda/envs/test-environment/lib/python3.6/site-packages/boto/__init__.py:1216: in <module>
    boto.plugin.load_plugins(config)
E   AttributeError: module 'boto' has no attribute 'plugin'