diff --git a/vizro-core/src/vizro/models/_dashboard.py b/vizro-core/src/vizro/models/_dashboard.py
index b331966d1..d80cc3766 100644
--- a/vizro-core/src/vizro/models/_dashboard.py
+++ b/vizro-core/src/vizro/models/_dashboard.py
@@ -2,7 +2,7 @@
 
 import logging
 from functools import partial
-from typing import TYPE_CHECKING, List, Literal, TypedDict, Any
+from typing import TYPE_CHECKING, List, Literal, TypedDict
 
 import dash
 import dash_bootstrap_components as dbc
@@ -14,6 +14,8 @@
 except ImportError:  # pragma: no cov
     from pydantic import Field, validator
 
+from dash.development.base_component import Component
+
 import vizro
 from vizro._constants import MODULE_PAGE_404, STATIC_URL_PREFIX
 from vizro.actions._action_loop._action_loop import ActionLoop
@@ -28,7 +30,7 @@
 logger = logging.getLogger(__name__)
 
 
-def _all_hidden(components: List[Any]):
+def _all_hidden(components: List[Component]):
     """Returns True if all components are either None and/or have hidden=True."""
     return all(component is None or getattr(component, "hidden", False) for component in components)
 
diff --git a/vizro-core/tests/unit/vizro/models/test_page.py b/vizro-core/tests/unit/vizro/models/test_page.py
index 3757bc66b..cc0a5b556 100644
--- a/vizro-core/tests/unit/vizro/models/test_page.py
+++ b/vizro-core/tests/unit/vizro/models/test_page.py
@@ -152,9 +152,3 @@ def test_action_auto_generation_valid(self, standard_px_chart):
 
 
 # TODO: Add unit tests for private methods in page build
-@pytest.mark.usefixtures("vizro_app")
-def test_page_build_left_side_removed(standard_px_chart):
-    page = vm.Page(title="Single Page", components=[vm.Graph(id="scatter_chart", figure=standard_px_chart)])
-    dashboard = vm.Dashboard(pages=[page])
-    dashboard.pre_build()
-    assert "id='left-main'" not in str(page.build())