diff --git a/tests/plans/test_bimorph.py b/tests/plans/test_bimorph.py
new file mode 100644
index 0000000000..77bbdbf341
--- /dev/null
+++ b/tests/plans/test_bimorph.py
@@ -0,0 +1,51 @@
+from unittest.mock import ANY
+
+import pytest
+from bluesky.run_engine import RunEngine
+from bluesky.utils import Msg
+from ophyd_async.core import DeviceCollector
+from ophyd_async.testing import callback_on_mock_put, set_mock_value
+
+from dodal.devices.slits import Slits
+from dodal.plans.bimorph import SlitDimension, move_slits
+
+
+@pytest.fixture
+def slits(RE: RunEngine) -> Slits:
+    with DeviceCollector(mock=True):
+        slits = Slits("FAKE-PREFIX:")
+
+    for motor in [slits.x_gap, slits.y_gap, slits.x_centre, slits.y_centre]:
+
+        def callback(value, wait=False, signal=motor.user_readback):
+            breakpoint()
+            set_mock_value(signal, value)
+
+        callback_on_mock_put(motor.user_setpoint, callback)
+    return slits
+
+
+@pytest.mark.parametrize("dimension", [SlitDimension.X, SlitDimension.Y])
+@pytest.mark.parametrize("gap", [1.0])
+@pytest.mark.parametrize("center", [2.0])
+async def test_move_slits(
+    slits: Slits,
+    dimension: SlitDimension,
+    gap: float,
+    center: float,
+):
+    messages = list(move_slits(slits, dimension, gap, center))
+
+    if dimension == SlitDimension.X:
+        gap_signal = slits.x_gap
+        centre_signal = slits.x_centre
+    else:
+        gap_signal = slits.y_gap
+        centre_signal = slits.y_centre
+
+    assert [
+        Msg("set", gap_signal, gap, group=ANY),
+        Msg("wait", None, group=ANY),
+        Msg("set", centre_signal, center, group=ANY),
+        Msg("wait", None, group=ANY),
+    ] == messages