StorageError: Quota Exceeded
If mysterious errors occur during testing and you see a POSException.StorageError somewhere:
The maximum quota for this demonstration storage
has been exceeded.<br>Have a nice day.''')
it may be because your test requires more memory than an allowed quota.
In /lib/python/Testing, custom_zodb.py, there is a cap of 1MB set (1<<20) on the test database. You can raise this if necessary.