def METHOD_NAME(self):
    """Prepare a collection with one sample."""
    collection = Collection.objects.create(
        name="Reference spaces of Data Flywheel for AI/ML",
        slug="reference-spaces",
        contributor=self.contributor,
    )
    sample_1 = Sample.objects.create(name="Sample 1", contributor=self.contributor)
    sample_1.slug = "sample-1"
    sample_1.name = "SAMPLE 1"
    sample_1.collection = collection
    sample_1.save()
    return collection, sample_1