diff --git a/src/dodal/beamlines/i03_supervisor.py b/src/dodal/beamlines/i03_supervisor.py
new file mode 100644
index 00000000000..f17473b6114
--- /dev/null
+++ b/src/dodal/beamlines/i03_supervisor.py
@@ -0,0 +1,19 @@
+from dodal.common.beamlines.beamline_utils import set_beamline as set_utils_beamline
+from dodal.device_manager import DeviceManager
+from dodal.devices.baton import Baton
+from dodal.log import set_beamline as set_log_beamline
+from dodal.utils import BeamlinePrefix, get_beamline_name
+
+BL = get_beamline_name("i03")
+set_log_beamline(BL)
+set_utils_beamline(BL)
+
+PREFIX = BeamlinePrefix(BL)
+
+
+devices = DeviceManager()
+
+
+@devices.factory()
+def baton() -> Baton:
+    return Baton(f"{PREFIX.beamline_prefix}-CS-BATON-01:")
diff --git a/src/dodal/testing/__init__.py b/src/dodal/testing/__init__.py
new file mode 100644
index 00000000000..e69de29bb2d