diff --git a/src/ophyd_async/epics/areadetector/controllers/aravis_controller.py b/src/ophyd_async/epics/areadetector/controllers/aravis_controller.py
index 27de15d253..8f4786f395 100644
--- a/src/ophyd_async/epics/areadetector/controllers/aravis_controller.py
+++ b/src/ophyd_async/epics/areadetector/controllers/aravis_controller.py
@@ -76,7 +76,7 @@ def _get_trigger_info(
         else:
             return (
                 ADAravisTriggerMode.on,
-                ADAravisTriggerSource(f"line_{self.gpio_number}"),
+                ADAravisTriggerSource[f"line_{self.gpio_number}"],
             )
 
     async def disarm(self):
diff --git a/tests/epics/areadetector/test_aravis.py b/tests/epics/areadetector/test_aravis.py
index af43b86f37..77a2a75dc7 100644
--- a/tests/epics/areadetector/test_aravis.py
+++ b/tests/epics/areadetector/test_aravis.py
@@ -10,8 +10,14 @@
     set_sim_value,
 )
 from ophyd_async.epics.areadetector.aravis import ADAravisDetector
-from ophyd_async.epics.areadetector.controllers.aravis_controller import ADAravisController
-from ophyd_async.epics.areadetector.drivers.aravis_driver import ADAravisDriver, ADAravisTriggerSource
+from ophyd_async.epics.areadetector.controllers.aravis_controller import (
+    ADAravisController,
+)
+from ophyd_async.epics.areadetector.drivers.aravis_driver import (
+    ADAravisDriver,
+    ADAravisTriggerSource,
+)
+
 
 @pytest.fixture
 async def adaravis_driver(RE: RunEngine) -> ADAravisDriver:
@@ -126,9 +132,32 @@ async def test_hints_from_hdf_writer(adaravis: ADAravisDetector):
 
 
 async def test_unsupported_trigger_excepts(adaravis: ADAravisDetector):
+    set_sim_value(adaravis._controller._drv.model, "Manta G-125")
+    set_sim_value(adaravis._controller._drv.pixel_format, "Mono12Packed")
+
     with pytest.raises(
         ValueError,
-        # str(EnumClass.value) handling changed in Python 3.11
         match=r"ADAravisController only supports the following trigger types: .* but",
     ):
         await adaravis.prepare(TriggerInfo(1, DetectorTrigger.variable_gate, 1, 1))
+
+async def test_unsupported_model_excepts(adaravis: ADAravisDetector):
+    set_sim_value(adaravis._controller._drv.model, "foo")
+    set_sim_value(adaravis._controller._drv.pixel_format, "bar")
+
+    with pytest.raises(
+        AssertionError,
+        match=r"Detector .* needs at least nans deadtime, but trigger logic provides",
+    ):
+        await adaravis.prepare(TriggerInfo(1, DetectorTrigger.variable_gate, 1, 1))
+        
+        
+async def test_unsupported_pixel_format_excepts(adaravis: ADAravisDetector):
+    set_sim_value(adaravis._controller._drv.model, "Manta G-235")
+    set_sim_value(adaravis._controller._drv.pixel_format, "bar")
+
+    with pytest.raises(
+        AssertionError,
+        match=r"Detector .* needs at least nans deadtime, but trigger logic provides",
+    ):
+        await adaravis.prepare(TriggerInfo(1, DetectorTrigger.variable_gate, 1, 1))
\ No newline at end of file