diff --git a/examples/parallel-vtkhdf.py b/examples/parallel-vtkhdf.py
index 3ff980ed746eacfeef4012e156b5c7e931d33faf..287597b287ff8a0cff56c4ac65362c6a6b8792cc 100644
--- a/examples/parallel-vtkhdf.py
+++ b/examples/parallel-vtkhdf.py
@@ -73,7 +73,7 @@ def main(*, ambient_dim: int) -> None:
     logger.info("[%4d] fields: finished", comm.rank)
 
     from meshmode.discretization.visualization import make_visualizer
-    vis = make_visualizer(actx, discr, vis_order=order, force_equidistant=False)
+    vis = make_visualizer(actx, discr, force_equidistant=False)
     logger.info("[%4d] make_visualizer: finished", comm.rank)
 
     filename = f"parallel-vtkhdf-example-{ambient_dim}d.hdf"
diff --git a/examples/simple-dg.py b/examples/simple-dg.py
index 51da62f6239a15cc7c730c157fe16bb12335302f..efc396b2e1489d6d3cda1d654ad8420c7d54289f 100644
--- a/examples/simple-dg.py
+++ b/examples/simple-dg.py
@@ -341,6 +341,9 @@ class TracePair:
     interior: ArrayContainer
     exterior: ArrayContainer
 
+    # NOTE: let the container do the broadcasting + arithmetic
+    __array_ufunc__ = None
+
     def __getattr__(self, name):
         return map_array_container(
                 lambda ary: getattr(ary, name),
@@ -450,6 +453,9 @@ class WaveState:
     u: DOFArray
     v: np.ndarray  # [object]
 
+    # NOTE: let the container do the broadcasting + arithmetic
+    __array_ufunc__ = None
+
     def __post_init__(self):
         assert isinstance(self.v, np.ndarray) and self.v.dtype.char == "O"