diff --git a/tests/tests_devices/test_eiger.py b/tests/tests_devices/test_eiger.py
index 1f2d954..1b81a13 100644
--- a/tests/tests_devices/test_eiger.py
+++ b/tests/tests_devices/test_eiger.py
@@ -20,7 +20,7 @@ from jfjoch_client.models.measurement_statistics import MeasurementStatistics
 from ophyd import Staged
 from ophyd_devices.utils.psi_device_base_utils import DeviceStatus
 
-from csaxs_bec.devices.jungfraujoch.eiger import Eiger
+from csaxs_bec.devices.jungfraujoch.eiger import EigerError
 from csaxs_bec.devices.jungfraujoch.eiger_1_5m import Eiger1_5M
 from csaxs_bec.devices.jungfraujoch.eiger_9m import Eiger9M
 
@@ -284,7 +284,9 @@ def test_eiger_on_complete(eiger_1_5m, raise_timeout):
 
     with (
         mock.patch.object(
-            eiger.jfj_client.api, "status_get", return_value=BrokerStatus(state="Idle")
+            eiger.jfj_client.api,
+            "status_get",
+            return_value=BrokerStatus(state="Idle", message_severity="info"),
         ),
         mock.patch.object(eiger.jfj_client, "wait_for_idle", side_effect=mock_wait_for_idle),
         mock.patch.object(
@@ -312,6 +314,43 @@ def test_eiger_on_complete(eiger_1_5m, raise_timeout):
         assert status.success == False if raise_timeout else True
 
 
+def test_eiger_on_complete_error_message(eiger_1_5m):
+    """Test that on_complete raises if the message severity is error."""
+    # Test that on_complete raises if message_severity is error
+    eiger = eiger_1_5m
+    unblock_wait_for_idle = threading.Event()
+    raise_timeout = False
+
+    def mock_wait_for_idle(timeout: float, raise_on_timeout: bool) -> bool:
+        if unblock_wait_for_idle.wait(timeout):
+            if raise_timeout:
+                return False
+            return True
+        return False
+
+    with (
+        mock.patch.object(
+            eiger.jfj_client.api,
+            "status_get",
+            return_value=BrokerStatus(state="Idle", message_severity="error", message="Test error"),
+        ),
+        mock.patch.object(eiger.jfj_client, "wait_for_idle", side_effect=mock_wait_for_idle),
+        mock.patch.object(
+            eiger.jfj_client.api,
+            "statistics_data_collection_get",
+            return_value=MeasurementStatistics(
+                run_number=1,
+                images_collected=eiger.scan_info.msg.num_points
+                * eiger.scan_info.msg.scan_parameters["frames_per_trigger"],
+            ),
+        ),
+    ):
+        with pytest.raises(EigerError):
+            status = eiger.complete()
+            unblock_wait_for_idle.set()
+            status.wait(timeout=2)
+
+
 def test_eiger_file_event_callback(eiger_1_5m, tmp_path):
     """Test the file_event callback of the Eiger detector. This is equivalent for 9M and 1_5M."""
     eiger = eiger_1_5m