@karandesai-96 From http://doc.pytest.org/en/latest/parametrize.html#pytest-mark-parametrize-parametrizing-test-functions

In versions prior to 2.4 one needed to specify the argument names as a tuple. This remains valid but the simpler "name1,name2,..." comma-separated-string syntax is now advertised first because it’s easier to write and produces less line noise.