class RuboCop::Cop::Minitest::AssertWithExpectedArgument

def on_send(node)
  assert_with_two_arguments?(node) do |_expected, message|
    return if message.str_type? || message.dstr_type? || MESSAGE_VARIABLES.include?(message.source)
    arguments = node.arguments.map(&:source).join(', ')
    add_offense(node, message: format(MSG, arguments: arguments))
  end
end