Why MATLAB creates garbage files in current folder after running MATLAB Test

And there's a folder named "dig"

I'm not sure which version of MATLAB created those files because I run MATLAB Tests by more than a dozen of versions.

[Rik]

Without having a look at the code or determining which release did this, it is probably hard to help you.

[Avni Agrawal]

I suspect the issue might be related to code cleanup once tests are completed. However, it would be better to share code so that I can debug this issue more intricately.