diff --git a/tests/test_api/test_types/test_chat.py b/tests/test_api/test_types/test_chat.py
index 5fc9e081..e2f6bdca 100644
--- a/tests/test_api/test_types/test_chat.py
+++ b/tests/test_api/test_types/test_chat.py
@@ -1,3 +1,7 @@
+from typing import Optional
+
+from pytest import mark, param
+
 from aiogram.types import Chat
 
 
@@ -15,3 +19,24 @@ class TestChat:
         method = chat.unban_sender_chat(sender_chat_id=-1337)
         assert method.chat_id == chat.id
         assert method.sender_chat_id == -1337
+
+    @mark.parametrize(
+        "first,last,title,chat_type,result",
+        [
+            param("First", None, None, "private", "First", id="private_first_only"),
+            param("First", "Last", None, "private", "First Last", id="private_with_last"),
+            param(None, None, "Title", "group", "Title", id="group_with_title"),
+            param(None, None, "Title", "supergroup", "Title", id="supergroup_with_title"),
+            param(None, None, "Title", "channel", "Title", id="channel_with_title"),
+        ],
+    )
+    def test_full_name(
+        self,
+        first: Optional[str],
+        last: Optional[str],
+        title: Optional[str],
+        chat_type: str,
+        result: str,
+    ):
+        chat = Chat(id=42, first_name=first, last_name=last, title=title, type=chat_type)
+        assert chat.full_name == result