Problems with svnserve authentication

I have a test repository called test in /home/subversion/test, and have
created a user named "test" to run svnserve under.

So, I have the following in /home/subversion/test/conf/svnserve.conf:

    [general]
    anon-access = none
    auth-access = none

All files under /home/subversion are UID/GID test, since I found out the
hard way that subversion doesn't play well with just group read/write
permissions.

Launching svnserve as follows:

    sudo -u test svnserve -d -r /var/svn

runs it as the restricted user.

Alas, I can still check out files anonymously. What's going wrong here?

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