<blockquote>
<blockquote>
<p>If there's some way to disable them in the example config (I assume they're not actually used in the tests), would that be better?</p>
</blockquote>
<p><a href="https://github.com/openstreetmap/openstreetmap-website/blob/master/config/image_optim/test.yml">The warnings should already be excluded when running the tests</a>. Did you see the warnings during development?</p>
</blockquote>
<p>Yes, although during <code>bundle exec rake db:migrate</code> (and perhaps <code>db:create</code> too, I can't remember), not during the tests.</p>

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