This scenario:

Scenario: Remove the ability to add the comments block to Dashboard

And this step:

And the add block selector should not contain "Courses" block

Breaks when you have another block installed that has "Courses" as part of its name.

I believe the solution is to update \behat_theme_boost_behat_blocks::the_add_block_selector_should_not_contain_block to use a "named_exact" selector, but all the selectors I found use "named_partial".

It looks like (all the?) other methods in \behat_theme_boost_behat_blocks should get the same fix as well.