diff --git a/lib/Slic3r/Test.pm b/lib/Slic3r/Test.pm
index c0137f9e4..b767ca593 100644
--- a/lib/Slic3r/Test.pm
+++ b/lib/Slic3r/Test.pm
@@ -158,8 +158,12 @@ sub model {
     $object->add_volume(mesh => $mesh, material_id => $model_name);
     $object->add_instance(
         offset          => Slic3r::Pointf->new(0,0),
-        rotation        => $params{rotation} // 0,
-        scaling_factor  => $params{scale} // 1,
+        # 3D full transform
+        rotation        => Slic3r::Pointf3->new(0, 0, $params{rotation} // 0),
+        scaling_factor  => Slic3r::Pointf3->new($params{scale} // 1, $params{scale} // 1, $params{scale} // 1),
+        # old transform
+#        rotation        => $params{rotation} // 0,
+#        scaling_factor  => $params{scale} // 1,
     );
     return $model;
 }