Black Outlines After UV Test

After testing out Blender’s UV functionalities all my edges have a black outline which I can’t seem to get rid of.

There is no material/texture and freestyle is toggled off.

Here is a screenshot:

Thanks for your time,

It’s not clear what your problem is. What black outline are you referring to? Your image shows that you are in Face edit mode. Are you referring to the black dots on each face? Does it look differently if you change to edge mode? Please describe your problem clearly.