Upgrading with testing enabled is not going to install much, as testing is running pretty clean right now.
The only things in testing right now are...in the /l directory herethe /n directory herethe xap directory here.and the xfce directory here.
You can see what of the above installed by checking
tail -20 /var/log/pkgtools
Where -20 is the number of lines from the end of the file you want to see.
Now if xfce upgraded then, you will need instruction on how to downgrade again as doing so will most likely break your system.
If so, post in another thread, so this thread can continue with working on gscan2pdf.