diff --git a/examples/moving-geometry.py b/examples/moving-geometry.py
index efec9fe3..81fe086d 100644
--- a/examples/moving-geometry.py
+++ b/examples/moving-geometry.py
@@ -245,7 +245,7 @@ def source(t, x):
 if __name__ == "__main__":
     cl_ctx = cl.create_some_context()
     queue = cl.CommandQueue(cl_ctx)
-    actx = PyOpenCLArrayContext(queue)
+    actx = PyOpenCLArrayContext(queue, force_device_scalars=True)
 
     from pytools import ProcessTimer
     for _ in range(1):
diff --git a/examples/plot-connectivity.py b/examples/plot-connectivity.py
index ce27d5db..7d3bbd59 100644
--- a/examples/plot-connectivity.py
+++ b/examples/plot-connectivity.py
@@ -11,7 +11,7 @@
 def main():
     cl_ctx = cl.create_some_context()
     queue = cl.CommandQueue(cl_ctx)
-    actx = PyOpenCLArrayContext(queue)
+    actx = PyOpenCLArrayContext(queue, force_device_scalars=True)
 
     from meshmode.mesh.generation import (  # noqa: F401
         generate_icosahedron,
diff --git a/examples/simple-dg.py b/examples/simple-dg.py
index f8752698..52ae4547 100644
--- a/examples/simple-dg.py
+++ b/examples/simple-dg.py
@@ -439,7 +439,9 @@ def bump(actx, discr, t=0):
             / source_width**2))
 
 
-@with_container_arithmetic(bcast_obj_array=True, rel_comparison=True)
+@with_container_arithmetic(bcast_obj_array=True,
+                           rel_comparison=True,
+                           _cls_has_array_context_attr=True)
 @dataclass_array_container
 @dataclass(frozen=True)
 class WaveState: