diff --git a/tests/data_service/test_task_manager.py b/tests/data_service/test_task_manager.py
new file mode 100644
index 0000000..675d7ae
--- /dev/null
+++ b/tests/data_service/test_task_manager.py
@@ -0,0 +1,104 @@
+import logging
+
+from pytest import CaptureFixture
+
+import pydase
+
+logger = logging.getLogger()
+
+
+def test_autostart_task_callback(capsys: CaptureFixture) -> None:
+    class MyService(pydase.DataService):
+        def __init__(self) -> None:
+            self._autostart_tasks = {  # type: ignore
+                "my_task": (),
+                "my_other_task": (),
+            }
+            super().__init__()
+
+        async def my_task(self) -> None:
+            logger.info("Triggered task.")
+
+        async def my_other_task(self) -> None:
+            logger.info("Triggered other task.")
+
+    service = MyService()
+    service._task_manager.start_autostart_tasks()
+
+    captured = capsys.readouterr()
+    expected_output = sorted(
+        [
+            "MyService.my_task = {}",
+            "MyService.my_other_task = {}",
+        ]
+    )
+    actual_output = sorted(captured.out.strip().split("\n"))  # type: ignore
+    assert expected_output == actual_output
+
+
+def test_DataService_subclass_autostart_task_callback(capsys: CaptureFixture) -> None:
+    class MySubService(pydase.DataService):
+        def __init__(self) -> None:
+            self._autostart_tasks = {  # type: ignore
+                "my_task": (),
+                "my_other_task": (),
+            }
+            super().__init__()
+
+        async def my_task(self) -> None:
+            logger.info("Triggered task.")
+
+        async def my_other_task(self) -> None:
+            logger.info("Triggered other task.")
+
+    class MyService(pydase.DataService):
+        sub_service = MySubService()
+
+    service = MyService()
+    service._task_manager.start_autostart_tasks()
+
+    captured = capsys.readouterr()
+    expected_output = sorted(
+        [
+            "MyService.sub_service.my_task = {}",
+            "MyService.sub_service.my_other_task = {}",
+        ]
+    )
+    actual_output = sorted(captured.out.strip().split("\n"))  # type: ignore
+    assert expected_output == actual_output
+
+
+def test_DataServiceList_subclass_autostart_task_callback(
+    capsys: CaptureFixture,
+) -> None:
+    class MySubService(pydase.DataService):
+        def __init__(self) -> None:
+            self._autostart_tasks = {  # type: ignore
+                "my_task": (),
+                "my_other_task": (),
+            }
+            super().__init__()
+
+        async def my_task(self) -> None:
+            logger.info("Triggered task.")
+
+        async def my_other_task(self) -> None:
+            logger.info("Triggered other task.")
+
+    class MyService(pydase.DataService):
+        sub_services_list = [MySubService() for i in range(2)]
+
+    service = MyService()
+    service._task_manager.start_autostart_tasks()
+
+    captured = capsys.readouterr()
+    expected_output = sorted(
+        [
+            "MyService.sub_services_list[0].my_task = {}",
+            "MyService.sub_services_list[0].my_other_task = {}",
+            "MyService.sub_services_list[1].my_task = {}",
+            "MyService.sub_services_list[1].my_other_task = {}",
+        ]
+    )
+    actual_output = sorted(captured.out.strip().split("\n"))  # type: ignore
+    assert expected_output == actual_output