// Extract output metadata
  std::map<std::string, std::string> output_metadata;
  for (const auto& metadata : output_model.metadata) {
    const auto& data = output_model.buffers[metadata->buffer]->data;
    output_metadata[metadata->name] = std::string(data.begin(), data.end());
  }

  EXPECT_THAT(output_metadata,
              testing::Contains(testing::Pair(expected_key, expected_value)));
}