Of course
The weird thing is, I just realized I have been specifying:
--config /Users/mikechurchward/www/moodlehq.git/bht_moodledata/behat/behat.yml
for both the "vendor/bin/behat" and the "php admin/tool/behat/cli/run.php" commands. I guess the second one doesn't actually pay attention to the "--config " argument?
Anyway, thanks for your help.
mike