"The system cannot find the file specified" when running analysis server test

When trying to run this file with Ctrl+F5 I get this error:

<img width="1363" height="701" alt="Image" src="https://github.com/user-attachments/assets/f4b4bd79-fed5-443e-aaa2-e2996cd0f71f" />

This might be related to the change to use the test runner, but I'm pretty sure I've run many test files since then.