module MiniTest

def self.filter_backtrace bt
  return ["No backtrace"] unless bt
  new_bt = []
  bt.each do |line|
    break if line.rindex(MINI_DIR, 0)
    new_bt << line
  end
  new_bt = bt.reject { |line| line.rindex(MINI_DIR, 0) } if new_bt.empty?
  new_bt = bt.dup if new_bt.empty?
  new_bt
end