class WebMock::URIStringPattern

def add_query_params(query_params)
  super
  if @query_params.is_a?(Hash) || @query_params.is_a?(String)
    query_hash = (WebMock::Util::QueryMapper.query_to_values(@pattern.query, notation: Config.instance.query_values_notation) || {}).merge(@query_params)
    @pattern.query = WebMock::Util::QueryMapper.values_to_query(query_hash, notation: WebMock::Config.instance.query_values_notation)
    @query_params = nil
  end
end