diff --git a/tests/test_custom_task.py b/tests/test_custom_task.py
new file mode 100644
index 0000000..b719c4a
--- /dev/null
+++ b/tests/test_custom_task.py
@@ -0,0 +1,59 @@
+from tests.conftest import BaseTest
+from python3_anticaptcha.core.enum import ProxyTypeEnm, CaptchaTypeEnm
+from python3_anticaptcha.custom_task import CustomTask
+from python3_anticaptcha.core.serializer import GetTaskResultResponseSer
+
+
+class TestCustomTask(BaseTest):
+    websiteURL = "https://anti-captcha.com/tutorials/v2-textarea"
+    templateName = "Anti-bot screen bypass"
+    variables = {"css_selector": "some value"}
+
+    def get_proxy_args(self) -> dict:
+        proxy_args = super().get_proxy_args()
+        proxy_args.update({"proxyType": ProxyTypeEnm.https})
+        return proxy_args
+
+    def test_sio_success(self):
+        instance = CustomTask(
+            api_key=self.API_KEY,
+            websiteURL=self.websiteURL,
+            templateName=self.templateName,
+            variables=self.variables,
+            captcha_type=CaptchaTypeEnm.GeeTestTaskProxyless,
+            **self.get_proxy_args(),
+        )
+        result = instance.captcha_handler()
+
+        assert isinstance(result, dict)
+        ser_result = GetTaskResultResponseSer(**result)
+        assert ser_result.errorId in (24,)
+
+    async def test_aio_success(self):
+        instance = CustomTask(
+            api_key=self.API_KEY,
+            websiteURL=self.websiteURL,
+            templateName=self.templateName,
+            variables=self.variables,
+            captcha_type=CaptchaTypeEnm.GeeTestTaskProxyless,
+            **self.get_proxy_args(),
+        )
+        result = await instance.aio_captcha_handler()
+
+        assert isinstance(result, dict)
+        ser_result = GetTaskResultResponseSer(**result)
+        assert ser_result.errorId in (24,)
+
+    def test_proxy_args(self):
+        proxy_args = self.get_proxy_args()
+
+        instance = CustomTask(
+            api_key=self.API_KEY,
+            websiteURL=self.websiteURL,
+            templateName=self.templateName,
+            variables=self.variables,
+            captcha_type=CaptchaTypeEnm.GeeTestTaskProxyless,
+            **proxy_args,
+        )
+        for key, value in proxy_args.items():
+            assert instance.task_params[key] == value