Hi, I've made my first pytest plugin named pytest-quickcheck for generating random data. http://pypi.python.org/pypi/pytest-quickcheck/ Originally, this idea is inspired by Haskell QuickCheck (and paycheck, its Python implementation). http://www.haskell.org/haskellwiki/Introduction_to_QuickCheck http://pypi.python.org/pypi/paycheck/ I think it's useful to make sure of the robustness by generating lots of test-data for data-driven test. However, this plugin is still experimental beta, so I'll welcome any comments or suggestions on. thanks, Tetsuya