diff --git a/tests/TgBotLib/Methods/SendMessageTest.php b/tests/TgBotLib/Methods/SendMessageTest.php
new file mode 100644
index 0000000..11227d9
--- /dev/null
+++ b/tests/TgBotLib/Methods/SendMessageTest.php
@@ -0,0 +1,35 @@
+<?php
+
+namespace TgBotLib\Methods;
+
+use PHPUnit\Framework\TestCase;
+use TgBotLib\Bot;
+use TgBotLib\Objects\Message;
+
+class SendMessageTest extends TestCase
+{
+    const int TEST_CHAT_ID = -1001301191379;
+    private static Bot $bot;
+
+    /**
+     * @return void
+     */
+    public static function setUpBeforeClass(): void
+    {
+        self::$bot = new Bot(BOT_TOKEN);
+    }
+
+    /**
+     * Tests the `sendMessage` function of the bot instance.
+     *
+     * @return void
+     */
+    public function testSendMessage(): void
+    {
+        $result = self::$bot->sendMessage(chat_id: self::TEST_CHAT_ID, text: 'Test Unit: sendMessage');
+
+        $this->assertInstanceOf(Message::class, $result);
+        $this->assertEquals(self::TEST_CHAT_ID, $result->getChat()->getId());
+        $this->assertEquals('Test Unit: sendMessage', $result->getText());
+    }
+}