diff --git a/tests/unit/plugins/modules/test_clickhouse_client.py b/tests/unit/plugins/modules/test_clickhouse_client.py
new file mode 100644
index 0000000..1946a0d
--- /dev/null
+++ b/tests/unit/plugins/modules/test_clickhouse_client.py
@@ -0,0 +1,89 @@
+from __future__ import (absolute_import, division, print_function)
+
+__metaclass__ = type
+
+import pytest
+from uuid import UUID
+from decimal import Decimal
+from ipaddress import IPv4Address, IPv6Address
+
+
+from ansible_collections.community.clickhouse.plugins.modules.clickhouse_client import (
+    is_uuid,
+    vals_to_supported,
+    replace_val_in_tuple,
+)
+
+
+@pytest.mark.parametrize(
+    'input_params,result',
+    [
+        ('e66c72d8-fbd2-c174-0df3-7cbfd0c3d635', True),
+        ('qwerty123', False),
+        ('meaningless text', False),
+        ('d1659f3e-83fe-3845-f1be-5fada6046b67', True),
+    ]
+)
+def test_is_uuid(input_params, result):
+    # Testing the function is_uuid
+    assert is_uuid(input_params) == result
+
+
+@pytest.mark.parametrize(
+    'input_params,result',
+    [
+        (((1, 2, 3, 4), 3, 5),
+         (1, 2, 3, 5)
+         ),
+        (((1, 2, 3, 4), 2, 5),
+         (1, 2, 5, 4)
+         ),
+        (((1, 2, 3, 4), 1, 5),
+         (1, 5, 3, 4)
+         ),
+        (((1, 2), 0, 5),
+         (5, 2)
+         ),
+    ]
+)
+def test_replace_val_in_tuple(input_params, result):
+    # Testing the function replace_val_in_tuple
+    assert replace_val_in_tuple(*input_params) == result
+
+
+@pytest.mark.parametrize(
+    'input_params,result',
+    [
+        ([
+            ('default', UUID('e66c72d8-fbd2-c174-0df3-7cbfd0c3d635')),
+            ('test', UUID('4bfbe653-9137-0ea6-b97d-dc391ec9a919')),
+        ], [
+            ('default', 'e66c72d8-fbd2-c174-0df3-7cbfd0c3d635'),
+            ('test', '4bfbe653-9137-0ea6-b97d-dc391ec9a919'),
+        ],),
+        ([
+            ('localhost', IPv4Address('127.0.0.1')),
+            ('non_routable', IPv4Address('0.0.0.0')),
+        ], [
+            ('localhost', '127.0.0.1'),
+            ('non_routable', '0.0.0.0'),
+        ],),
+        ([
+            ('localhost', IPv6Address('::1')),
+            ('non_routable', IPv6Address('::')),
+        ], [
+            ('localhost', '::1'),
+            ('non_routable', '::'),
+        ],),
+        ([
+            ('pi', Decimal('3.14159')),
+            ('e', Decimal('2.71828')),
+        ], [
+            ('pi', 3.14159),
+            ('e', 2.71828),
+        ],),
+    ]
+)
+def test_vals_to_supported(input_params, result):
+    # Testing the function vals_to_supported
+    assert vals_to_supported(input_params) == result