diff --git a/tests/tests_scans/test_lamni_fermat_scan.py b/tests/tests_scans/test_lamni_fermat_scan.py
index 564233e..4173e46 100644
--- a/tests/tests_scans/test_lamni_fermat_scan.py
+++ b/tests/tests_scans/test_lamni_fermat_scan.py
@@ -229,6 +229,22 @@ def device_manager_mock():
                         "kwargs": {},
                     },
                 ),
+                messages.DeviceInstructionMessage(
+                    metadata={
+                        "readout_priority": "monitored",
+                        "RID": "1234",
+                        "device_instr_id": "diid",
+                    },
+                    device="lsamrot",
+                    action="rpc",
+                    parameter={
+                        "device": "lsamrot",
+                        "func": "readback.get",
+                        "rpc_id": "rpc_id",
+                        "args": (),
+                        "kwargs": {},
+                    },
+                ),
                 messages.DeviceInstructionMessage(
                     metadata={
                         "readout_priority": "monitored",