diff --git a/ophyd_devices/sim/sim_test_devices.py b/ophyd_devices/sim/sim_test_devices.py
index 635b095..d9b0b41 100644
--- a/ophyd_devices/sim/sim_test_devices.py
+++ b/ophyd_devices/sim/sim_test_devices.py
@@ -330,7 +330,7 @@ class SimCameraWithPSIComponents(SimCamera):
     file_event = Cpt(FileEventSignal, doc="File event signal")
     progress = Cpt(ProgressSignal, doc="Progress signal")
     dynamic_signal = Cpt(
-        DynamicSignal, doc="Dynamic signals", signals=["dyn_signal1", "dyn_signal2"]
+        DynamicSignal, doc="Dynamic signals", signals=["dyn_signal1", "dyn_signal2"], max_size=1000
     )
     async_signal = Cpt(AsyncSignal, name="async_signal", ndim=1, doc="Async signal", max_size=1000)
     # TODO Handling of AsyncComponents is postponed, issue #104 is created
diff --git a/tests/test_utils.py b/tests/test_utils.py
index ddc7b44..7672e06 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -343,7 +343,7 @@ def test_utils_dynamic_signal():
                 "enabled": True,
                 "rpc_access": False,
                 "signals": [("sig1", 1), ("sig2", 1)],
-                "signal_metadata": {},
+                "signal_metadata": {"max_size": 10},
                 "acquisition_group": None,
             },
         }