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Definition

The duplicate rows test checks if there are rows that are identical to each other in the dataset.

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Taxonomy

  • Category: Integrity.
  • Task types: LLM, tabular classification, tabular regression, text classification.
  • Availability: and .

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Why it matters

  • Duplicate rows on the training set can lead the model to overfit on the duplicated examples.
  • Duplicate rows on the validation set can distort the aggregate metrics, making them overly optimistic or pessimistic.

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Test configuration examples

If you are writing a tests.json, here are a few valid configurations for the character length test:

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