diff --git a/src/hyperion/external_interaction/callbacks/ispyb_callback_base.py b/src/hyperion/external_interaction/callbacks/ispyb_callback_base.py
index 4f19b61ff..a821cf03e 100644
--- a/src/hyperion/external_interaction/callbacks/ispyb_callback_base.py
+++ b/src/hyperion/external_interaction/callbacks/ispyb_callback_base.py
@@ -4,6 +4,8 @@
 from collections.abc import Sequence
 from typing import TYPE_CHECKING, Any, Callable, Dict, Optional, TypeVar
 
+from dodal.devices.synchrotron import SynchrotronMode
+
 from hyperion.external_interaction.callbacks.common.ispyb_mapping import (
     populate_data_collection_group,
 )
@@ -96,9 +98,13 @@ def activity_gated_event(self, doc: Event) -> Event:
             self._event_driven_data_collection_info.undulator_gap1 = doc["data"][
                 "undulator_current_gap"
             ]
-            self._event_driven_data_collection_info.synchrotron_mode = doc["data"][
-                "synchrotron-synchrotron_mode"
-            ]
+            assert isinstance(
+                synchrotron_mode := doc["data"]["synchrotron-synchrotron_mode"],
+                SynchrotronMode,
+            )
+            self._event_driven_data_collection_info.synchrotron_mode = (
+                synchrotron_mode.value
+            )
             self._event_driven_data_collection_info.slitgap_horizontal = doc["data"][
                 "s4_slit_gaps_xgap"
             ]
diff --git a/tests/conftest.py b/tests/conftest.py
index 15e4020cb..c22f51b3b 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -539,6 +539,7 @@ def fake_fgs_composite(
     done_status,
     attenuator,
     xbpm_feedback,
+    synchrotron,
     aperture_scatterguard,
     zocalo,
     dcm,
@@ -555,7 +556,7 @@ def fake_fgs_composite(
         s4_slit_gaps=i03.s4_slit_gaps(fake_with_ophyd_sim=True),
         smargon=smargon,
         undulator=i03.undulator(fake_with_ophyd_sim=True),
-        synchrotron=i03.synchrotron(fake_with_ophyd_sim=True),
+        synchrotron=synchrotron,
         xbpm_feedback=xbpm_feedback,
         zebra=i03.zebra(fake_with_ophyd_sim=True),
         zocalo=zocalo,
diff --git a/tests/unit_tests/experiment_plans/conftest.py b/tests/unit_tests/experiment_plans/conftest.py
index 0ff5d09c6..304b370ec 100644
--- a/tests/unit_tests/experiment_plans/conftest.py
+++ b/tests/unit_tests/experiment_plans/conftest.py
@@ -6,6 +6,7 @@
 from bluesky.utils import Msg
 from dodal.devices.fast_grid_scan import FastGridScan
 from dodal.devices.oav.oav_detector import OAVConfigParams
+from dodal.devices.synchrotron import SynchrotronMode
 from dodal.devices.zocalo import ZocaloResults, ZocaloTrigger
 from event_model import Event
 from ophyd.sim import make_fake_device
@@ -43,7 +44,7 @@ def make_event_doc(data, descriptor="abc123") -> Event:
 
 BASIC_PRE_SETUP_DOC = {
     "undulator_current_gap": 0,
-    "synchrotron-synchrotron_mode": 0,
+    "synchrotron-synchrotron_mode": SynchrotronMode.USER,
     "s4_slit_gaps_xgap": 0,
     "s4_slit_gaps_ygap": 0,
     "robot-barcode": "BARCODE",
diff --git a/tests/unit_tests/external_interaction/callbacks/conftest.py b/tests/unit_tests/external_interaction/callbacks/conftest.py
index f81b383cc..e16ec25af 100644
--- a/tests/unit_tests/external_interaction/callbacks/conftest.py
+++ b/tests/unit_tests/external_interaction/callbacks/conftest.py
@@ -1,4 +1,5 @@
 import pytest
+from dodal.devices.synchrotron import SynchrotronMode
 from dodal.devices.zocalo.zocalo_results import ZOCALO_READING_PLAN_NAME
 from event_model.documents import Event, EventDescriptor, RunStart, RunStop
 
@@ -61,21 +62,6 @@ class TestData:
         "uid": "2093c941-ded1-42c4-ab74-ea99980fbbfd",
         "subplan_name": CONST.PLAN.ROTATION_MAIN,
     }
-    test_rotation_event_document_pre_data_collection: Event = {
-        "descriptor": "bd45c2e5-2b85-4280-95d7-a9a15800a78b",
-        "time": 1666604299.828203,
-        "data": {
-            "s4_slit_gaps_xgap": 0.1234,
-            "s4_slit_gaps_ygap": 0.2345,
-            "synchrotron-synchrotron_mode": "test",
-            "undulator_current_gap": 1.234,
-            "robot-barcode": "BARCODE",
-        },
-        "timestamps": {"det1": 1666604299.8220396, "det2": 1666604299.8235943},
-        "seq_num": 1,
-        "uid": "2093c941-ded1-42c4-ab74-ea99980fbbfd",
-        "filled": {},
-    }
     test_rotation_event_document_during_data_collection: Event = {
         "descriptor": "bd45c2e5-2b85-4280-95d7-a9a15800a78b",
         "time": 2666604299.928203,
@@ -143,7 +129,7 @@ class TestData:
         "data": {
             "s4_slit_gaps_xgap": 0.1234,
             "s4_slit_gaps_ygap": 0.2345,
-            "synchrotron-synchrotron_mode": "test",
+            "synchrotron-synchrotron_mode": SynchrotronMode.USER,
             "undulator_current_gap": 1.234,
             "robot-barcode": "BARCODE",
         },
diff --git a/tests/unit_tests/external_interaction/callbacks/rotation/test_ispyb_callback.py b/tests/unit_tests/external_interaction/callbacks/rotation/test_ispyb_callback.py
index 8b18765d8..c6bb5ca8f 100644
--- a/tests/unit_tests/external_interaction/callbacks/rotation/test_ispyb_callback.py
+++ b/tests/unit_tests/external_interaction/callbacks/rotation/test_ispyb_callback.py
@@ -98,9 +98,7 @@ def test_activity_gated_event(
     callback.activity_gated_descriptor(
         TestData.test_descriptor_document_pre_data_collection
     )
-    callback.activity_gated_event(
-        TestData.test_rotation_event_document_pre_data_collection
-    )
+    callback.activity_gated_event(TestData.test_event_document_pre_data_collection)
     callback.activity_gated_descriptor(
         TestData.test_descriptor_document_during_data_collection
     )
@@ -126,7 +124,7 @@ def test_activity_gated_event(
             "id": TEST_DATA_COLLECTION_IDS[0],
             "slitgaphorizontal": 0.1234,
             "slitgapvertical": 0.2345,
-            "synchrotronmode": "test",
+            "synchrotronmode": "User",
             "undulatorgap1": 1.234,
             "wavelength": 1.1164718451643736,
             "transmission": 98,
diff --git a/tests/unit_tests/external_interaction/callbacks/xray_centre/test_ispyb_callback.py b/tests/unit_tests/external_interaction/callbacks/xray_centre/test_ispyb_callback.py
index 73af6913f..ae284f08b 100644
--- a/tests/unit_tests/external_interaction/callbacks/xray_centre/test_ispyb_callback.py
+++ b/tests/unit_tests/external_interaction/callbacks/xray_centre/test_ispyb_callback.py
@@ -162,7 +162,7 @@ def test_activity_gated_event_2d(mock_ispyb_conn):
             "id": TEST_DATA_COLLECTION_IDS[0],
             "slitgaphorizontal": 0.1234,
             "slitgapvertical": 0.2345,
-            "synchrotronmode": "test",
+            "synchrotronmode": "User",
             "undulatorgap1": 1.234,
             "wavelength": 1.1164718451643736,
             "transmission": 100,
@@ -262,7 +262,7 @@ def test_activity_gated_event_3d(mock_ispyb_conn):
             "id": TEST_DATA_COLLECTION_IDS[0],
             "slitgaphorizontal": 0.1234,
             "slitgapvertical": 0.2345,
-            "synchrotronmode": "test",
+            "synchrotronmode": "User",
             "undulatorgap1": 1.234,
             "wavelength": 1.1164718451643736,
             "transmission": 100,