module Minitest::Line

def describes_with_lines(target_file)
  runnables.map do |runnable|
    next unless caller = runnable.instance_variable_defined?(:@minitest_line_caller) && runnable.instance_variable_get(:@minitest_line_caller)
    next unless line = caller.detect { |l| l.include?(target_file) }
    ["/#{Regexp.escape(runnable.name)}/", line[/:(\d+):in/, 1].to_i]
  end.compact
end