diff --git a/tests/unit_tests/core/fake_device_module_failing.py b/tests/unit_tests/core/fake_device_module_failing.py
index 1fb64c945..0fe3df71a 100644
--- a/tests/unit_tests/core/fake_device_module_failing.py
+++ b/tests/unit_tests/core/fake_device_module_failing.py
@@ -1,5 +1,20 @@
+from ophyd_async.core import LazyMock, StandardReadable
 from ophyd_async.epics.motor import Motor
 
 
+class TimingOutDevice(StandardReadable):
+    async def connect(
+        self,
+        mock: bool | LazyMock = False,
+        timeout: float = 1.0,
+        force_reconnect: bool = False,
+    ) -> None:
+        raise TimeoutError("Connection timed out")
+
+
 def failing_device() -> Motor:
     raise TimeoutError("FooBar")
+
+
+def timing_out_device() -> TimingOutDevice:
+    return TimingOutDevice()