# File lib/minitest/unit.rb, line 337
    def location e
      last_before_assertion = ""
      e.backtrace.reverse_each do |s|
        break if s =~ /in .(assert|refute|flunk|pass|fail|raise)/
        last_before_assertion = s
      end
      last_before_assertion.sub(/:in .*$/, '')
    end