```ruby
require "minitest/reporters"

module MiniTest
module Reporters

  class RedStackReporter < SpecReporter

    private

    def pad_test(test)
      str = test.to_s.gsub(/(test_)/, '').gsub(/_/, ' ')
      pad("%-#{TEST_SIZE}s" % str, TEST_PADDING)[0..TEST_SIZE]
    end

    def print_info(e)
      print "       #{e.exception.class.to_s}:\n"
      e.message.each_line { |line| print_with_info_padding(line) }

      trace = filter_backtrace(e.backtrace)
      trace.each { |line| print_with_info_padding(line) }
    end

  end

end
end

MiniTest::Reporters.use! MiniTest::Reporters::RedStackReporter.new```

Add manual filter to backtrace
user
```ruby
require "minitest/reporters"

module MiniTest
module Reporters

  class RedStackReporter < SpecReporter

    private

    def pad_test(test)
      str = test.to_s.gsub(/(test_)/, '').gsub(/_/, ' ')
      pad("%-#{TEST_SIZE}s" % str, TEST_PADDING)[0..TEST_SIZE]
    end

    def print_info(e)
      print "       #{e.exception.class.to_s}:\n"
      e.message.each_line { |line| print_with_info_padding(line) }

      trace = filter_backtrace(e.backtrace)
      
      # TODO: Use the proper MiniTest way of customizing the filter
      trace.each { |line| print_with_info_padding(line) unless line =~ /\.rvm|gems|_run_anything/ }
    end

  end

end
end

MiniTest::Reporters.use! MiniTest::Reporters::RedStackReporter.new```
assistant