diff --git a/src/ophyd_async/epics/areadetector/pilatus.py b/src/ophyd_async/epics/areadetector/pilatus.py
index 539726cdf0..fc3dd7f158 100644
--- a/src/ophyd_async/epics/areadetector/pilatus.py
+++ b/src/ophyd_async/epics/areadetector/pilatus.py
@@ -22,7 +22,6 @@ class PilatusDetector(StandardDetector):
 
     def __init__(
         self,
-        prefix: str,
         name: str,
         directory_provider: DirectoryProvider,
         driver: PilatusDriver,
diff --git a/tests/epics/areadetector/test_pilatus.py b/tests/epics/areadetector/test_pilatus.py
index e3c3c03cbb..e673a3e189 100644
--- a/tests/epics/areadetector/test_pilatus.py
+++ b/tests/epics/areadetector/test_pilatus.py
@@ -54,7 +54,6 @@ async def pilatus(
 ) -> PilatusDetector:
     async with DeviceCollector(sim=True):
         pilatus = PilatusDetector(
-            "PILATUS:",
             "pilatus",
             static_directory_provider,
             driver=pilatus_driver,