$result = $this->callAPISuccess('Contribution', 'getfields', []);
$this->assertArrayHasKey('custom_' . $ids['custom_field_id'], $result['values']);
$this->assertArrayNotHasKey('custom_' . $idsContact['custom_field_id'], $result['values']);
$result = $this->callAPISuccess('Contribution', 'getfields', []);
$this->assertArrayHasKey('custom_' . $ids['custom_field_id'], $result['values']);
$this->assertArrayNotHasKey('custom_' . $idsContact['custom_field_id'], $result['values']);