# How do I test and document seeds?

To test and document seeds, use a [properties file](../../reference/configs-and-properties.md) and nest the configurations under a `seeds:` key

## Example

seeds/properties.yml

```yml
seeds:
  - name: country_codes
    description: A mapping of two letter country codes to country names
    columns:
      - name: country_code
        data_tests:
          - unique
          - not_null
      - name: country_name
        data_tests:
          - unique
          - not_null
```

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