diff --git a/osbase/oci/oci_test.go b/osbase/oci/oci_test.go
index 93976ed..573771b 100644
--- a/osbase/oci/oci_test.go
+++ b/osbase/oci/oci_test.go
@@ -33,7 +33,7 @@
 }`
 	// Pass nil for blobs, which means reading can only work if it uses the
 	// embedded content.
-	image, err := NewImage([]byte(manifest), "", nil)
+	image, err := AsImage(NewRef([]byte(manifest), "application/vnd.oci.image.manifest.v1+json", "", nil))
 	if err != nil {
 		t.Fatal(err)
 	}