diff --git a/examples/sample_get_identity_buckets.py b/examples/sample_get_identity_buckets.py
index 1d42820..b0f29f6 100644
--- a/examples/sample_get_identity_buckets.py
+++ b/examples/sample_get_identity_buckets.py
@@ -6,7 +6,7 @@
 
 # this sample client takes timestamp string as input and generates an IdentityBucketsResponse object which contains
 # a list of buckets, the timestamp string in the format YYYY-MM-DD[*HH[:MM[:SS[.fff[fff]]]][+HH:MM[:SS[.ffffff]]]],
-# for example: UTC: 2024-07-02, 2024-07-02T14:30:15.123456+00:00 and EST: 2024-07-02T14:30:15.123456-05:00
+# for example: local timezone: 2024-07-02, UTC: 2024-07-02T14:30:15.123456+00:00, EST: 2024-07-02T14:30:15.123456-05:00
 
 def _usage():
     print('Usage: python3 sample_get_identity_buckets.py <base_url> <api_key> <client_secret> <timestamp>'
diff --git a/tests/test_identity_map_client_unit_tests.py b/tests/test_identity_map_client_unit_tests.py
index 7a928e3..7820969 100644
--- a/tests/test_identity_map_client_unit_tests.py
+++ b/tests/test_identity_map_client_unit_tests.py
@@ -1,11 +1,15 @@
+import base64
+import json
 import unittest
 import datetime as dt
+from unittest.mock import patch, MagicMock
 
 from uid2_client import IdentityMapClient, get_datetime_utc_iso_format
 
 
 class IdentityMapUnitTests(unittest.TestCase):
-    identity_map_client = IdentityMapClient("UID2_BASE_URL", "UID2_API_KEY", "wJ0hP19QU4hmpB64Y3fV2dAed8t/mupw3sjN5jNRFzg=")
+    UID2_SECRET_KEY = base64.b64encode(b"UID2_CLIENT_SECRET").decode()
+    identity_map_client = IdentityMapClient("UID2_BASE_URL", "UID2_API_KEY", UID2_SECRET_KEY)
 
     def test_identity_buckets_invalid_timestamp(self):
         test_cases = ["1234567890",
@@ -30,3 +34,23 @@ def test_get_datetime_utc_iso_format_timestamp(self):
             iso_format_timestamp = get_datetime_utc_iso_format(timestamp)
             self.assertEqual(expected_timestamp, iso_format_timestamp)
 
+    @patch('uid2_client.identity_map_client.make_v2_request')
+    @patch('uid2_client.identity_map_client.post')
+    @patch('uid2_client.identity_map_client.parse_v2_response')
+    def test_identity_buckets_request(self, mock_parse_v2_response, mock_post, mock_make_v2_request):
+        expected_req = b'{"since_timestamp": "2024-07-02T14:30:15.123456"}'
+        test_cases = ["2024-07-02T14:30:15.123456+00:00", "2024-07-02 09:30:15.123456-05:00",
+                      "2024-07-02T08:30:15.123456-06:00", "2024-07-02T10:30:15.123456-04:00",
+                      "2024-07-02T06:30:15.123456-08:00", "2024-07-02T23:30:15.123456+09:00",
+                      "2024-07-03T00:30:15.123456+10:00", "2024-07-02T20:00:15.123456+05:30"]
+        mock_req = b'mocked_request_data'
+        mock_nonce = 'mocked_nonce'
+        mock_make_v2_request.return_value = (mock_req, mock_nonce)
+        mock_response = MagicMock()
+        mock_response.read.return_value = b'{"mocked": "response"}'
+        mock_post.return_value = mock_response
+        mock_parse_v2_response.return_value = b'{"body":[],"status":"success"}'
+        for timestamp in test_cases:
+            self.identity_map_client.get_identity_buckets(dt.datetime.fromisoformat(timestamp))
+            called_args, called_kwargs = mock_make_v2_request.call_args
+            self.assertEqual(expected_req, called_args[2])