Python Testing with pytest

Using Options

We’ve used the verbose option, -v or --verbose, a couple of times already, but there are many more options worth knowing about. We’re not going to use all of the options in this book, but quite a few. You can see all of them with pytest --help.

The following are a handful of options that are quite useful when starting out with pytest. This is by no means a complete list, but these options in particular address some common early desires for controlling how pytest runs when you’re first getting started.

$ pytest --help
  ... subset of the list ...
  -k EXPRESSION         only run tests/classes which match the given
                        substring expression.
                        Example: -k 'test_method or test_other' matches
 all test functions ...