[attestations] update tests for attestations

beat/web/attestations/tests.py

@@ -590,7 +590,7 @@ class CleanAttstationManagementCommandTestCase(AttestationsAPIBase):
     def test_outdated_attestation(self):
         experiment = Experiment.objects.all()[0]
         attestation = Attestation.objects.create_attestation(experiment)
-        attestation.expiration_date = attestation.expiration_date - timedelta(days=100)
+        attestation.expiration_date = attestation.expiration_date - timedelta(days=200)
         attestation.save()
         command_output = self.run_command()
         self.assertEqual(command_output, '1 attestation(s) successfully cleaned')