You know the page https://fedoraproject.org/wiki/QA:Testcase_USB_fmw wants us to upgrade/download
sudo dnf --enablerepo=updates-testing --refresh --best install mediawriter
that will not install
the required testing version (4.0.95)
but a new version. mediawriter-4.1.4-4.fc32.x86_64
I trust that is OK?