Fix test for drupal9

Other than my question above it looks good and works

I'm uploading a patch, the reason is that I don't think the core constraints have to be changed in this issue, and for a reason I dont understand I cant push to the MR

I made the patch to go forward but please do credit @escuriola

the strange branch name gave me quirky git behaviour, needs to upload another patch

Thank you both!

Automatically closed - issue fixed for 2 weeks with no activity.