<p>I'm confused by all those rake tasks too.  I created a dependency diagram.  It's from just active-record-5.2.3/lib/active_record/railties/database.rake.  Our entry point into this is db:test:prepare which test:db depends on.  You can right click and open the svg image.</p>
<p><a href="https://gist.github.com/openbrian/f89038bbc1d5218c7d1bf83a97c170e2">https://gist.github.com/openbrian/f89038bbc1d5218c7d1bf83a97c170e2</a></p>

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