diff --git a/airbyte-integrations/connectors/source-zendesk-support/unit_tests/test_other.py b/airbyte-integrations/connectors/source-zendesk-support/unit_tests/test_other.py
index 367973ff79b87..902cd43ea8859 100644
--- a/airbyte-integrations/connectors/source-zendesk-support/unit_tests/test_other.py
+++ b/airbyte-integrations/connectors/source-zendesk-support/unit_tests/test_other.py
@@ -6,20 +6,59 @@
 from datetime import datetime
 from urllib.parse import parse_qsl, urlparse
 
+import pendulum
 import pytz
 import requests
-from source_zendesk_support.streams import DATETIME_FORMAT, BaseSourceZendeskSupportStream
+from source_zendesk_support.source import BasicApiTokenAuthenticator
+from source_zendesk_support.streams import DATETIME_FORMAT, END_OF_STREAM_KEY, BaseSourceZendeskSupportStream, TicketComments
+
+# config
+STREAM_ARGS = {
+    "subdomain": "test",
+    "start_date": "2022-01-27T00:00:00Z",
+    "authenticator": BasicApiTokenAuthenticator("test@airbyte.io", "api_token"),
+}
 
 DATETIME_STR = "2021-07-22T06:55:55Z"
 DATETIME_FROM_STR = datetime.strptime(DATETIME_STR, DATETIME_FORMAT)
 STREAM_URL = "https://subdomain.zendesk.com/api/v2/stream.json?&start_time=1647532987&page=1"
 STREAM_RESPONSE: dict = {
-    "data": [],
-    "next_page": "https://subdomain.zendesk.com/api/v2/stream.json?&start_time=1647532987&page=2",
+    "ticket_events": [
+        {
+            "child_events": [
+                {
+                    "id": 99999,
+                    "via": {},
+                    "via_reference_id": None,
+                    "type": "Comment",
+                    "author_id": 10,
+                    "body": "test_comment",
+                    "html_body": '<div class="zd-comment" dir="auto">test_comment<br></div>',
+                    "plain_body": "test_comment",
+                    "public": True,
+                    "attachments": [],
+                    "audit_id": 123456,
+                    "created_at": "2022-03-17T16:03:07Z",
+                    "event_type": "Comment",
+                }
+            ],
+            "id": 999999,
+            "ticket_id": 3,
+            "timestamp": 1647532987,
+            "created_at": "2022-03-17T16:03:07Z",
+            "updater_id": 9999999,
+            "via": "Web form",
+            "system": {},
+            "metadata": {},
+            "event_type": "Audit",
+        }
+    ],
+    "next_page": "https://subdomain.zendesk.com/api/v2/stream.json?&start_time=1122334455&page=2",
     "count": 215,
-    "end_of_stream": True,
+    "end_of_stream": False,
     "end_time": 1647532987,
 }
+TEST_STREAM = TicketComments(**STREAM_ARGS)
 
 
 def test_str2datetime():
@@ -46,3 +85,36 @@ def test_parse_next_page_number(requests_mock):
     test_response = requests.get(STREAM_URL)
     output = BaseSourceZendeskSupportStream._parse_next_page_number(test_response)
     assert output == expected
+
+
+def test_next_page_token(requests_mock):
+    # mocking the logic of next_page_token
+    if STREAM_RESPONSE.get(END_OF_STREAM_KEY) is False:
+        expected = {"created_at": "1122334455"}
+    else:
+        expected = None
+    requests_mock.get(STREAM_URL, json=STREAM_RESPONSE)
+    test_response = requests.get(STREAM_URL)
+    output = TEST_STREAM.next_page_token(test_response)
+    assert expected == output
+
+
+def test_request_params(requests_mock):
+    expected = {"start_time": calendar.timegm(pendulum.parse(STREAM_ARGS.get("start_date")).utctimetuple()), "include": "comment_events"}
+    stream_state = None
+    requests_mock.get(STREAM_URL, json=STREAM_RESPONSE)
+    test_response = requests.get(STREAM_URL)
+    next_page_token = TEST_STREAM.next_page_token(test_response)
+    output = TEST_STREAM.request_params(stream_state, next_page_token)
+    assert expected == output
+
+
+def test_parse_response(requests_mock):
+    requests_mock.get(STREAM_URL, json=STREAM_RESPONSE)
+    test_response = requests.get(STREAM_URL)
+    output = TEST_STREAM.parse_response(test_response)
+    # get the first parsed element from generator
+    parsed_output = list(output)[0]
+    # check, if we have all transformations correctly
+    for entity in TicketComments.list_entities_from_event:
+        assert True if entity in parsed_output else False