Why are there no subtitles on the listening comprehension tests?

A "Listening Test" is a video exercise, without subtitles, that you can listen to or view as many times as you need before the final test.

This exercise allows you to develop your level of "Listening Comprehension", which is why the subtitles are not displayed.

Once the comprehension test has been validated, you have the option to view the video again with the subtitles displayed.