[TASK] Make unit tests from adminpanel more strict

Resolves: #94851
Releases: master
Change-Id: Ied2b2e1eb3ca05da12893a1ad23784e85bda74d5
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/70506


Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>