diff --git a/pkg/attestation/referrers_test.go b/pkg/attestation/referrers_test.go
index dc5a51a..f8ad8f8 100644
--- a/pkg/attestation/referrers_test.go
+++ b/pkg/attestation/referrers_test.go
@@ -69,6 +69,7 @@ func TestAttestationReferenceTypes(t *testing.T) {
 		indexName := fmt.Sprintf("%s/repo:root", u.Host)
 		require.NoError(t, err)
 		err = mirror.PushIndexToRegistry(signedIndex, indexName)
+		require.NoError(t, err)
 
 		for _, platform := range platforms {
 			// can eval policy in the normal way