Rails backtrace silencers do not work, while filters do

Question

Fresh Rails 4.2 set up. I want to suppress long error backtraces. In the following backtrace log first line would be enough for me, and next 4 could be removed

Answer 1

Problem was with Minitest-Reporters gem (adds colors to Minitest output), it messes up with Rails backtrace filters

To fix you need to add the following to test_helper.rb

Minitest::Reporters.use!(
  Minitest::Reporters::DefaultReporter.new,
  ENV,
  Minitest.backtrace_filter
)

Problem and solution details described here: https://github.com/kern/minitest-reporters#caveats