pytest>=2.7.0
mock>=1.0.1
tox>=1.9.2
behave>=1.2.4
pexpect>=3.3

pytest>=2.7.0
mock>=1.0.1
tox>=1.9.2
behave>=1.2.4
pexpect==3.3

Downgrade pexpect to fix Python 2.6 test failure
Downgrade pexpect to fix Python 2.6 test failure
