Testing ODBC

I have a potentially silly question. I've successfully tested the 
SQLite and SQLite 3 drivers; I'm now trying the ODBC driver against SQL 
Server. I've created a special database just for testing, and I've created 

a special test user who has rights to that database. The test user has 
only the 'public' role.

The ODBC test is failing:

        Error: A database error occurred: NIL / 42000
          [Microsoft][ODBC SQL Server Driver][SQL Server]Cannot drop the 
view 'sysconstraints' because it is a system view.

The problem is that test-connect-to-database in test-init.lisp is calling 
truncate-database in fddl.lisp, and that function tries to drop all views, 

etc in the database--including, for example, the system view 
'sysconstraints'. 

Any ideas? Should I set things up differently?