Moving to new folder issue

[NemesisNG]

Hi, wanting to take a full shop backup, copy to a new subfolder and then use that to test upgrading to V9.

I've copied the entire folder from /shop/ where is is currently, and put it in /shop9test/.

I've backed up the database and restored to a new database, changed the connection details in the parameters file.

And I've updated the shop url in the physical_uri filed in the database itself.

But, no matter what I do when I visit mydomain/shop9test it redirects me to mydomain/shop

Help!