$pfx.newsgroup=inbox.test
 $pfx.nntpserver=news.alt.example.com
 publicinbox.nntpserver=news.example.com
+publicinbox.imapserver=imaps://mail.example.com
 EOF
        $cfg = PublicInbox::Config->new(\$str);
        $ibx = $cfg->lookup_name('test');
        is_deeply($ibx->nntp_url({ www => { pi_cfg => $cfg }}),
                [ 'nntp://news.alt.example.com/inbox.test' ],
                'nntp_url uses per-inbox NNTP server');
+       is_deeply($ibx->imap_url({ www => { pi_cfg => $cfg }}),
+               [ 'imaps://mail.example.com/inbox.test' ],
+               'nntp_url uses per-inbox NNTP server');
 }
 
 # no obfuscate domains