Slowing down testing

[deltaGPhys]

Package is working great. When I am testing with a test db, though, I get a looong pause on:

Operations to perform:
  Synchronize unmigrated apps: admindocs, colorfield, dbbackup, django_archive, django_user_agents, messages, staticfiles
  Apply all migrations: admin, auth, benchmarks, contenttypes, gbook, sessions
Running pre-migrate handlers for application gbook
Running pre-migrate handlers for application benchmarks
Running pre-migrate handlers for application admin
Running pre-migrate handlers for application auth
Running pre-migrate handlers for application contenttypes
Running pre-migrate handlers for application sessions
Running pre-migrate handlers for application django_user_agents
Synchronizing apps without migrations:
  Creating tables...
    Running deferred SQL...
Running migrations:
  No migrations to apply.
Running post-migrate handlers for application gbook
Running post-migrate handlers for application benchmarks
Running post-migrate handlers for application admin
Running post-migrate handlers for application auth
Running post-migrate handlers for application contenttypes
Running post-migrate handlers for application sessions
Running post-migrate handlers for application django_user_agents

This last line - everything else goes by fast, and it takes a minute or more to clear the django_user_agents line. Anybody know what causes that or how to speed it up? Seen this before, @selwin ?

Thanks!