<blockquote>
<p>nobody has ever been able to work out under what circumstance this is necessary<br>
[...]<br>
sometimes it doesn't because the test database is cloned from the development one</p>
</blockquote>

<p>Does this happens when setting up a new dev/test instance?</p>

<p>In a new dev VM, to be able to run the tests, I have to do<br>
<code>rake db:migrate RAILS_ENV=test</code><br>
or<br>
<code>rake db:test:prepare</code> (we could use this as it loads <code>struture.sql</code> and is quick)</p>

<p>It seems that the test DB is kept up to date with <code>struture.sql</code><br>
<a href="http://guides.rubyonrails.org/testing.html#maintaining-the-test-database-schema">http://guides.rubyonrails.org/testing.html#maintaining-the-test-database-schema</a><br>
it should be when it already exists.</p>

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