Testing 4k with Full HD screen possible?

Hello guys,

I was wondering if it is possible to test 4k resolution with only a Full HD screen?

I have a Marketplace item on sale (a UMG widget) which is optimized and tested for screen resolutions up to Full HD, but a customer uttered the need to use it on 4k, and mentioned that it showed erroneous behavior on resolutions over 1080p.

I would like to help, but I don’t own a 4k monitor. Is it possible to test this with my hardware? Can I, for example, force the PIE to create a scaled-down 4k version on my screen?

Thanks in advance!