When trying to add the pixi interpreter to a project in PyCharm I follow the instructions and in the "Add Python Interpreter" dialog I choose: The "default" environment is found but there is a red ...

3b. Add a new interpreter 4. Add a system interpreter 5a. Select an existing system interpreter If your desired version was found, click OK. If not, go on to 5b.

PyCharm also lets you configure test configurations to manage how your tests are run. You can specify which tests to run, which Python interpreter to use, and other options.