README.md in trackler-2.2.1.152

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 ## Running the tests
 
 To run the tests, run the appropriate command below ([why they are different](https://github.com/pytest-dev/pytest/issues/1629#issue-161422224)):
 
 - Python 2.7: `py.test rectangles_test.py`
-- Python 3.3+: `pytest rectangles_test.py`
+- Python 3.4+: `pytest rectangles_test.py`
 
 Alternatively, you can tell Python to run the pytest module (allowing the same command to be used regardless of Python version):
 `python -m pytest rectangles_test.py`
 
 ### Common `pytest` options