In XML Result the attribute fullname of test-suite with the type "Assembly", does not contain an absolute filepath of the dll anymore.
NUnit-Framework 3.10.1:
<test-suite type='Assembly' id='0-1063' name='cgw_kammer.dll' fullname='C:\Users\thejoklla\source\repos\cgw_kammer\cgw_kammer\bin\Debug\cgw_kammer.dll'
NUnit-Framework 3.11.0:
<test-suite type="Assembly" id="0-1063" name="cgw_kammer.dll" fullname="cgw_kammer.dll"
Tested with NUnit.Engine.Api 3.9.0