1) bin/celerity syntax
2) bin/celerity map
3) bin/cache purge --all
4) sign in
5) go to user's Settings > Display Preferences and select the Accessibility (user interface) "Dark Mode".
6) go to Phriction or Maniphest and add a codeblock.
Example:
``` lang=php
<?php
final class Example extends PhabricatorApplication {
}
```
7) verify that codeblock content is readable
8) also check that with/without this, nothing changes in "normal" theme