diff --git a/tests/components/__init__.py b/tests/components/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/components/test_number_slider.py b/tests/components/test_number_slider.py
new file mode 100644
index 0000000..cb490d9
--- /dev/null
+++ b/tests/components/test_number_slider.py
@@ -0,0 +1,60 @@
+from pytest import CaptureFixture, LogCaptureFixture
+
+from pydase.components.number_slider import NumberSlider
+from pydase.data_service.data_service import DataService
+
+from .. import caplog  # noqa
+
+
+def test_NumberSlider(capsys: CaptureFixture) -> None:
+    class ServiceClass(DataService):
+        number_slider = NumberSlider(1, 0, 10, 1)
+        int_number_slider = NumberSlider(1, 0, 10, 1, "int")
+
+    service = ServiceClass()
+
+    assert service.number_slider.value == 1
+    assert isinstance(service.number_slider.value, float)
+    assert service.number_slider.min == 0
+    assert isinstance(service.number_slider.min, float)
+    assert service.number_slider.max == 10
+    assert isinstance(service.number_slider.max, float)
+    assert service.number_slider.step_size == 1
+    assert isinstance(service.number_slider.step_size, float)
+
+    assert service.int_number_slider.value == 1
+    assert isinstance(service.int_number_slider.value, int)
+    assert service.int_number_slider.step_size == 1
+    assert isinstance(service.int_number_slider.step_size, int)
+
+    service.number_slider.value = 10.0
+    service.int_number_slider.value = 10.1
+
+    captured = capsys.readouterr()
+
+    expected_output = sorted(
+        [
+            "ServiceClass.number_slider.value = 10.0",
+            "ServiceClass.int_number_slider.value = 10",
+        ]
+    )
+    actual_output = sorted(captured.out.strip().split("\n"))  # type: ignore
+    assert actual_output == expected_output
+
+    service.number_slider.min = 1.1
+
+    captured = capsys.readouterr()
+
+    expected_output = sorted(
+        [
+            "ServiceClass.number_slider.min = 1.1",
+        ]
+    )
+    actual_output = sorted(captured.out.strip().split("\n"))  # type: ignore
+    assert actual_output == expected_output
+
+
+def test_init_error(caplog: LogCaptureFixture) -> None:  # noqa
+    number_slider = NumberSlider(type="str")  # type: ignore # noqa
+
+    assert "Unknown type 'str'. Using 'float'" in caplog.text