Describe the bug
We can't run test suites from PRs based from the develop branch because Rubocop complains about duplicated spec examples:

https://circleci.com/gh/decidim/decidim/310857

I guess the rule is new, or something changed, but this should be fixed because it's blocking our development.

To Reproduce
Steps to reproduce the behavior:

1. Check a build from a PR based on develop: https://circleci.com/gh/decidim/decidim/310857
2. Or a build from develop directly: https://circleci.com/gh/decidim/decidim/310506
3. See error

Expected behavior
Rubocop doesn't complain.