diff --git a/python/test/src/testipaaca.py b/python/test/src/testipaaca.py
index c7a443fd4ece847b3220c6f8f2ae4c5c436ef833..460c1c52f2a5627cc306abdda5e688db56316669 100755
--- a/python/test/src/testipaaca.py
+++ b/python/test/src/testipaaca.py
@@ -64,6 +64,21 @@ class IpaacaCommitTestCases(unittest.TestCase):
 		time.sleep(0.1)
 		received_iu = self.ib.iu_store[self.iu.uid]
 		self.assertTrue(received_iu.committed)
+	
+	def testCommitAndLocalWrite(self):
+		self.ob.add(self.iu)
+		time.sleep(0.1)
+		self.iu.commit()
+		with self.assertRaises(ipaaca.IUCommittedError):
+			self.iu.payload['data'] = 'updatedData'
+	
+	def testCommitAndRemoteWrite(self):
+		self.ob.add(self.iu)
+		time.sleep(0.1)
+		self.iu.commit()
+		received_iu = self.ib.iu_store[self.iu.uid]
+		with self.assertRaises(ipaaca.IUCommittedError):
+			received_iu.payload['data'] = 'updatedData'
 
 
 class IpaacaLinksTestCase(unittest.TestCase):
@@ -130,27 +145,27 @@ class IpaacaRemoteWriteTestCase(unittest.TestCase):
 		self.ib = ipaaca.InputBuffer('TestIn', ['sensorcategory'])
 		self.ib.register_handler(handle_iu_event)
 		self.ob = ipaaca.OutputBuffer('TestOut')
-		self.sensor_iu = ipaaca.IU('sensorcategory')
-		self.sensor_iu.payload = {'data': 'sensordata'}
+		self.iu = ipaaca.IU('sensorcategory')
+		self.iu.payload = {'data': 'sensordata'}
 		time.sleep(0.1)
-		self.ob.add(self.sensor_iu)
+		self.ob.add(self.iu)
 		time.sleep(0.1)
 	def tearDown(self):
 		pass
 	def testRemotePayloadChange(self):
-		self.assertIn(self.sensor_iu.uid, self.ib.iu_store)
-		received_iu = self.ib.iu_store[self.sensor_iu.uid]
+		self.assertIn(self.iu.uid, self.ib.iu_store)
+		received_iu = self.ib.iu_store[self.iu.uid]
 		received_iu.payload['data'] = 'updatedData'
 		time.sleep(0.1)
-		self.assertEqual(self.sensor_iu.payload['data'], 'updatedData')
+		self.assertEqual(self.iu.payload['data'], 'updatedData')
 	def testRemotePayloadReplace(self):
-		self.assertIn(self.sensor_iu.uid, self.ib.iu_store)
-		received_iu = self.ib.iu_store[self.sensor_iu.uid]
+		self.assertIn(self.iu.uid, self.ib.iu_store)
+		received_iu = self.ib.iu_store[self.iu.uid]
 		received_iu.payload = { 'key1': 'value1', 'key2': 'value2' }
 		time.sleep(0.1)
-		self.assertEqual(len(self.sensor_iu.payload), 2)
-		self.assertEqual(self.sensor_iu.payload['key1'], 'value1')
-		self.assertEqual(self.sensor_iu.payload['key2'], 'value2')
+		self.assertEqual(len(self.iu.payload), 2)
+		self.assertEqual(self.iu.payload['key1'], 'value1')
+		self.assertEqual(self.iu.payload['key2'], 'value2')
 
 
 if __name__ == '__main__':