def METHOD_NAME(self):
    """Successful retrieval with custom port"""
    with Mocker() as mocker:
        mocker.get(
            "https://ghcr.io:1234/v2/goauthentik/blueprints/test/manifests/latest",
            json={
                "layers": [
                    {
                        "mediaType": OCI_MEDIA_TYPE,
                        "digest": "foo",
                    }
                ]
            },
        )
        mocker.get("https://ghcr.io:1234/v2/goauthentik/blueprints/test/blobs/foo", text="foo")
        self.assertEqual(
            BlueprintInstance(
                path="oci://ghcr.io:1234/goauthentik/blueprints/test:latest"
            ).retrieve(),
            "foo",
        )