Hello, I noticed that the README.md file for the python-cffi library contains an outdated command in the "Testing/development tips" section. The script suggests running pytest c/ testing/, which seems to be no longer valid or up-to-date.

Actual Behavior

To easily descript, I make one assumption:

• After git clone or wget && tar, we will get a directory called cffi or cffi-x.x.x. I call it repo-directory.

But in my computer(windows 11), when using the command pytest c/ testing/ in repo-directory, there is a mistake as below:

Then I change directory to repo-directory/src and then use the same command:

The command pytest c/ testing/ may not work as expected. But the command pytest src/c/ testing/ when in the repo-directory or the command pytest c/ ../testing/ in the repo-directory/src can both work.

So, I don't know if it's because I'm using it incorrectly or if the documentation is outdated... And I will give a PR to fix that by using pytest src/c/ testing/.