diff --git a/sirepo_bluesky/sirepo_ophyd.py b/sirepo_bluesky/sirepo_ophyd.py
index 7e141814..38f0d318 100644
--- a/sirepo_bluesky/sirepo_ophyd.py
+++ b/sirepo_bluesky/sirepo_ophyd.py
@@ -538,14 +538,14 @@ def create_classes(connection, create_objects=True, extra_model_fields=[]):
                         )
                     )
                 propagation = PropagationConfig(*sirepo_propagation[:])
-                classes[object_name] = propagation
+                classes[inflection.camelize(object_name)] = propagation
                 if create_objects:
                     objects[object_name] = propagation
 
         if sim_type == "srw":
             post_prop_params = connection.data["models"]["postPropagation"]
             sirepo_propagation = []
-            object_name = "postPropagation"
+            object_name = "post_propagation"
             for i in range(9):
                 sirepo_propagation.append(
                     SirepoSignal(
@@ -556,7 +556,7 @@ def create_classes(connection, create_objects=True, extra_model_fields=[]):
                     )
                 )
             propagation = PropagationConfig(*sirepo_propagation[:])
-            classes[object_name] = propagation
+            classes[inflection.camelize(object_name)] = propagation
             if create_objects:
                 objects[object_name] = propagation
 
diff --git a/sirepo_bluesky/tests/test_bl_elements_as_ophyd_objs.py b/sirepo_bluesky/tests/test_bl_elements_as_ophyd_objs.py
index f19047d1..252b8e38 100644
--- a/sirepo_bluesky/tests/test_bl_elements_as_ophyd_objs.py
+++ b/sirepo_bluesky/tests/test_bl_elements_as_ophyd_objs.py
@@ -33,7 +33,7 @@ def test_empty_simulation(srw_empty_simulation):
     globals().update(**objects)
 
     assert not srw_empty_simulation.data["models"]["beamline"]
-    objects.pop("postPropagation")
+    objects.pop("post_propagation")
     assert not objects
 
 
@@ -261,9 +261,9 @@ def test_srw_propagation_with_run_engine(RE, db, srw_chx_simulation, num_steps=5
     classes, objects = create_classes(connection=srw_chx_simulation)
     globals().update(**objects)
 
-    postPropagation.hrange_mod.kind = "hinted"  # noqa F821
+    post_propagation.hrange_mod.kind = "hinted"  # noqa F821
 
-    (uid,) = RE(bp.scan([sample], postPropagation.hrange_mod, 0.1, 0.3, num_steps))  # noqa F821
+    (uid,) = RE(bp.scan([sample], post_propagation.hrange_mod, 0.1, 0.3, num_steps))  # noqa F821
     hdr = db[uid]
     tbl = hdr.table(fill=True)
     print(tbl)