Currently, the .erb files are not checked during CI testing. On a couple of occasions, I've run into simple syntax errors in .erb files which could have/should have been caught.

Unfortunately, the RuboCop maintainers feel that testing .erb files is out of scope for RuboCop. However, there's a gem called Ruumba, which will strip the code out of .erb files and feed it to rubocop.

We should look into using Ruumba, or some other method of automatically checking our .erb files during CI.