Please see http://pivotfinland.com/pytest-sugar/

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pytest-sugar is a plugin for py.test that shows failures and errors instantly and shows a progress bar.

You will need the following prerequisites in order to use pytest-instafail:

• Python 2.5, 2.6, 2.7, 3.2, 3.3 or PyPy
• pytest 2.3 or newer

To install pytest-sugar:

$ pip install pytest-sugar

Then run your tests with:

$ py.test