diff --git a/tests/nightscout_fake.py b/tests/nightscout_fake.py
index 4db20f8..c8253a8 100644
--- a/tests/nightscout_fake.py
+++ b/tests/nightscout_fake.py
@@ -20,7 +20,7 @@ class NightscoutApi(tconnectsync.nightscout.NightscoutApi):
     def put_entry(self, ns_format, entity):
         self.put_entries[entity].append(ns_format)
 
-    def last_uploaded_entry(self, eventType, start_date=None, end_date=None):
+    def last_uploaded_entry(self, eventType, time_start=None, time_end=None):
         raise NotImplementedError
 
     def last_uploaded_activity(self, activityType):
diff --git a/tests/sync/test_pump_events.py b/tests/sync/test_pump_events.py
new file mode 100644
index 0000000..69e05e4
--- /dev/null
+++ b/tests/sync/test_pump_events.py
@@ -0,0 +1,149 @@
+#!/usr/bin/env python3
+
+import json
+import unittest
+from typing import Dict
+import copy
+
+from tconnectsync.sync.pump_events import ns_write_pump_events
+
+from ..nightscout_fake import NightscoutApi
+
+
+def _stub_last_uploaded_entry(eventType, time_start=None, time_end=None):
+    return None
+
+class TestNsWritePumpEvents(unittest.TestCase):
+
+    SITE_CHANGE_EVENT = {'time': '2024-02-04 16:27:50-05:00', 'event_type': 'Site/Cartridge Change'}
+    SITE_CHANGE_NS = {'created_at': '2024-02-04 16:27:50-05:00', 'enteredBy': 'Pump (tconnectsync)', 'eventType': 'Site Change', 'notes': 'Site/Cartridge Change','reason': 'Site/Cartridge Change'}
+    def test_write_single_sitechange_event(self):
+        nightscout = NightscoutApi()
+        nightscout.last_uploaded_entry = _stub_last_uploaded_entry
+        ns_write_pump_events(nightscout, [
+            self.SITE_CHANGE_EVENT
+        ])
+
+        self.assertDictEqual({
+            'treatments': [
+                self.SITE_CHANGE_NS
+            ]
+        }, dict(nightscout.uploaded_entries))
+
+    EMPTY_CART_EVENT = {'time': '2024-05-14 09:01:59-04:00', 'event_type': 'Empty Cartridge/Pump Shutdown'}
+    EMPTY_CART_NS = {'created_at': '2024-05-14 09:01:59-04:00', 'enteredBy': 'Pump (tconnectsync)', 'eventType': 'Basal Suspension', 'notes': 'Empty Cartridge/Pump Shutdown', 'reason': 'Empty Cartridge/Pump Shutdown'}
+    def test_write_single_emptycart_event(self):
+        nightscout = NightscoutApi()
+        nightscout.last_uploaded_entry = _stub_last_uploaded_entry
+        ns_write_pump_events(nightscout, [
+            self.EMPTY_CART_EVENT
+        ])
+
+        self.assertDictEqual({
+            'treatments': [
+                self.EMPTY_CART_NS
+            ]
+        }, dict(nightscout.uploaded_entries))
+
+    USER_SUSPENDED_EVENT = {'time': '2024-02-05 09:48:22-05:00', 'event_type': 'User Suspended'}
+    USER_SUSPENDED_NS = {'created_at': '2024-02-05 09:48:22-05:00', 'enteredBy': 'Pump (tconnectsync)', 'eventType': 'Basal Suspension', 'notes': 'User Suspended', 'reason': 'User Suspended'}
+    def test_write_single_usersuspended_event(self):
+        nightscout = NightscoutApi()
+        nightscout.last_uploaded_entry = _stub_last_uploaded_entry
+        ns_write_pump_events(nightscout, [
+            self.USER_SUSPENDED_EVENT
+        ])
+
+        self.assertDictEqual({
+            'treatments': [
+                self.USER_SUSPENDED_NS
+            ]
+        }, dict(nightscout.uploaded_entries))
+    
+    EXERCISE_EVENT = {'time': '2024-03-10 08:53:20-04:00', 'duration_mins': 269.3833333333333, 'event_type': 'Exercise'}
+    EXERCISE_NS = {'created_at': '2024-03-10 08:53:20-04:00', 'duration': 269.3833333333333, 'enteredBy': 'Pump (tconnectsync)', 'eventType': 'Exercise', 'notes': 'Exercise', 'reason': 'Exercise'}
+    EXERCISE_EXTENDED_EVENT = {'time': '2024-03-10 08:53:20-04:00', 'duration_mins': 585.8833333333333, 'event_type': 'Exercise'}
+    EXERCISE_EXTENDED_NS = {'created_at': '2024-03-10 08:53:20-04:00', 'duration': 585.8833333333333, 'enteredBy': 'Pump (tconnectsync)', 'eventType': 'Exercise', 'notes': 'Exercise', 'reason': 'Exercise'}
+    def test_write_exercise_events(self):
+        nightscout = NightscoutApi()
+        nightscout.last_uploaded_entry = _stub_last_uploaded_entry
+        ns_write_pump_events(nightscout, [
+            self.EXERCISE_EVENT
+        ])
+
+        self.assertDictEqual({
+            'treatments': [
+                self.EXERCISE_NS
+            ]
+        }, dict(nightscout.uploaded_entries))
+
+        _id = 'exercise_id'
+        def _last_uploaded_entry(eventType, time_start=None, time_end=None):
+            if eventType == 'Exercise':
+                return {
+                    '_id': _id,
+                    **self.EXERCISE_NS
+                }
+
+        nightscout.last_uploaded_entry = _last_uploaded_entry
+
+        ns_write_pump_events(nightscout, [
+            self.EXERCISE_EXTENDED_EVENT
+        ])
+
+        self.assertListEqual([
+            'treatments/%s' % _id
+        ], nightscout.deleted_entries)
+
+        self.assertDictEqual({
+            'treatments': [
+                self.EXERCISE_NS,
+                self.EXERCISE_EXTENDED_NS
+            ]
+        }, dict(nightscout.uploaded_entries))
+    
+    SLEEP_EVENT = {'time': '2024-02-07 00:00:19-05:00', 'duration_mins': 13.916666666666666, 'event_type': 'Sleep'}
+    SLEEP_NS = {'created_at': '2024-02-07 00:00:19-05:00', 'duration': 13.916666666666666, 'enteredBy': 'Pump (tconnectsync)', 'eventType': 'Sleep', 'notes': 'Sleep', 'reason': 'Sleep'}
+    SLEEP_EXTENDED_EVENT = {'time': '2024-02-07 00:00:19-05:00', 'duration_mins': 74.0, 'event_type': 'Sleep'}
+    SLEEP_EXTENDED_NS = {'created_at': '2024-02-07 00:00:19-05:00', 'duration': 74.0, 'enteredBy': 'Pump (tconnectsync)', 'eventType': 'Sleep', 'notes': 'Sleep', 'reason': 'Sleep'}
+    def test_write_sleep_events(self):
+        nightscout = NightscoutApi()
+        nightscout.last_uploaded_entry = _stub_last_uploaded_entry
+        ns_write_pump_events(nightscout, [
+            self.SLEEP_EVENT
+        ])
+
+        self.assertDictEqual({
+            'treatments': [
+                self.SLEEP_NS
+            ]
+        }, dict(nightscout.uploaded_entries))
+
+        _id = 'sleep_id'
+        def _last_uploaded_entry(eventType, time_start=None, time_end=None):
+            if eventType == 'Sleep':
+                return {
+                    '_id': _id,
+                    **self.SLEEP_NS
+                }
+
+        nightscout.last_uploaded_entry = _last_uploaded_entry
+
+        ns_write_pump_events(nightscout, [
+            self.SLEEP_EXTENDED_EVENT
+        ])
+
+        self.assertListEqual([
+            'treatments/%s' % _id
+        ], nightscout.deleted_entries)
+
+        self.assertDictEqual({
+            'treatments': [
+                self.SLEEP_NS,
+                self.SLEEP_EXTENDED_NS
+            ]
+        }, dict(nightscout.uploaded_entries))
+    
+
+if __name__ == '__main__':
+    unittest.main()
\ No newline at end of file