diff --git a/tests/unit_tests/test_bec_status_box.py b/tests/unit_tests/test_bec_status_box.py
new file mode 100644
index 00000000..573eca2a
--- /dev/null
+++ b/tests/unit_tests/test_bec_status_box.py
@@ -0,0 +1,152 @@
+import re
+from unittest import mock
+
+import pytest
+from bec_lib.messages import BECStatus, ServiceMetricMessage, StatusMessage
+from qtpy.QtCore import QMetaMethod
+
+from bec_widgets.widgets.bec_status_box.bec_status_box import BECServiceInfoContainer, BECStatusBox
+
+from .client_mocks import mocked_client
+
+
+@pytest.fixture
+def status_box(qtbot, mocked_client):
+    with mock.patch(
+        "bec_widgets.widgets.bec_status_box.bec_status_box.BECServiceStatusMixin"
+    ) as mock_service_status_mixin:
+        widget = BECStatusBox(client=mocked_client)
+        qtbot.addWidget(widget)
+        qtbot.waitExposed(widget)
+        yield widget
+
+
+def test_status_box_init(qtbot, mocked_client):
+    with mock.patch(
+        "bec_widgets.widgets.bec_status_box.bec_status_box.BECServiceStatusMixin"
+    ) as mock_service_status_mixin:
+        name = "my test"
+        widget = BECStatusBox(parent=None, service_name=name, client=mocked_client)
+        qtbot.addWidget(widget)
+        qtbot.waitExposed(widget)
+        assert widget.tree_widget.headerItem().DontShowIndicator.value == 1
+        assert widget.tree_widget.children()[0].children()[0].config.service_name == name
+
+
+def test_update_top_item(qtbot, mocked_client):
+    with (
+        mock.patch(
+            "bec_widgets.widgets.bec_status_box.bec_status_box.BECServiceStatusMixin"
+        ) as mock_service_status_mixin,
+        mock.patch(
+            "bec_widgets.widgets.bec_status_box.status_item.StatusItem.update_config"
+        ) as mock_update,
+    ):
+        name = "my test"
+        widget = BECStatusBox(parent=None, service_name=name, client=mocked_client)
+        qtbot.addWidget(widget)
+        qtbot.waitExposed(widget)
+        widget.update_top_item_status(status="RUNNING")
+        assert widget.bec_service_info_container[name].status == "RUNNING"
+        assert mock_update.call_args == mock.call(widget.bec_service_info_container[name].dict())
+
+
+def test_create_status_widget(status_box):
+    name = "test_service"
+    status = BECStatus.IDLE
+    info = {"test": "test"}
+    metrics = {"metric": "test_metric"}
+    item = status_box._create_status_widget(name, status, info, metrics)
+    assert item.config.service_name == name
+    assert item.config.status == status.name
+    assert item.config.info == info
+    assert item.config.metrics == metrics
+
+
+def test_bec_service_container(status_box):
+    name = "test_service"
+    status = BECStatus.IDLE
+    info = {"test": "test"}
+    metrics = {"metric": "test_metric"}
+    expected_return = BECServiceInfoContainer(
+        service_name=name, status=status, info=info, metrics=metrics
+    )
+    assert status_box.service_name in status_box.bec_service_info_container
+    assert len(status_box.bec_service_info_container) == 1
+    status_box._update_bec_service_container(name, status, info, metrics)
+    assert len(status_box.bec_service_info_container) == 2
+    assert status_box.bec_service_info_container[name] == expected_return
+
+
+def test_add_tree_item(status_box):
+    name = "test_service"
+    status = BECStatus.IDLE
+    info = {"test": "test"}
+    metrics = {"metric": "test_metric"}
+    assert len(status_box.tree_widget.children()[0].children()) == 1
+    status_box.add_tree_item(name, status, info, metrics)
+    assert len(status_box.tree_widget.children()[0].children()) == 2
+    assert name in status_box.tree_items
+
+
+def test_update_service_status(status_box):
+    """Also checks check redundant tree items"""
+    name = "test_service"
+    status = BECStatus.IDLE
+    info = {"test": "test"}
+    metrics = {"metric": "test_metric"}
+    status_box.add_tree_item(name, status, info, {})
+    not_connected_name = "invalid_service"
+    status_box.add_tree_item(not_connected_name, status, info, metrics)
+
+    services_status = {name: StatusMessage(name=name, status=status, info=info)}
+    services_metrics = {name: ServiceMetricMessage(name=name, metrics=metrics)}
+
+    with mock.patch.object(status_box, "update_core_services", return_value=services_status):
+        assert not_connected_name in status_box.tree_items
+        status_box.update_service_status(services_status, services_metrics)
+        assert status_box.tree_items[name][1].config.metrics == metrics
+        assert not_connected_name not in status_box.tree_items
+
+
+def test_update_core_services(qtbot, mocked_client):
+    with (
+        mock.patch(
+            "bec_widgets.widgets.bec_status_box.bec_status_box.BECServiceStatusMixin"
+        ) as mock_service_status_mixin,
+        mock.patch(
+            "bec_widgets.widgets.bec_status_box.bec_status_box.BECStatusBox.update_top_item_status"
+        ) as mock_update,
+    ):
+        name = "my test"
+        status_box = BECStatusBox(parent=None, service_name=name, client=mocked_client)
+        qtbot.addWidget(status_box)
+        qtbot.waitExposed(status_box)
+        status_box.CORE_SERVICES = ["test_service"]
+        name = "test_service"
+        status = BECStatus.RUNNING
+        info = {"test": "test"}
+        metrics = {"metric": "test_metric"}
+        services_status = {name: StatusMessage(name=name, status=status, info=info)}
+        services_metrics = {name: ServiceMetricMessage(name=name, metrics=metrics)}
+
+        status_box.update_core_services(services_status, services_metrics)
+        assert mock_update.call_args == mock.call(status.name)
+
+        status = BECStatus.IDLE
+        services_status = {name: StatusMessage(name=name, status=status, info=info)}
+        services_metrics = {name: ServiceMetricMessage(name=name, metrics=metrics)}
+        status_box.update_core_services(services_status, services_metrics)
+        assert mock_update.call_args == mock.call("ERROR")
+
+
+def test_double_click_item(status_box):
+    name = "test_service"
+    status = BECStatus.IDLE
+    info = {"test": "test"}
+    metrics = {"MyData": "This should be shown nicely"}
+    status_box.add_tree_item(name, status, info, metrics)
+    item, status_item = status_box.tree_items[name]
+    with mock.patch.object(status_item, "show_popup") as mock_show_popup:
+        status_box.tree_widget.itemDoubleClicked.emit(item, 0)
+        assert mock_show_popup.call_count == 1