Just adding a redgreen gem, the "rake test" always ends with a line:
0 tests, 0 statements, 0 errors, 0 errors
I created a sample project on github: https://github.com/joel1di1/test_colored_tests
In your Gemfile, change the group to both: test and: test: just. test.
Thus, when you perform tests, red pearls are required.
https://fooobar.com/questions/1811669/how-to-unset-a-jquery-tab-cookie