diff --git a/vizro-core/tests/unit/vizro/models/_navigation/test_navigation.py b/vizro-core/tests/unit/vizro/models/_navigation/test_navigation.py
index 44a89b91d..a774bbe5c 100644
--- a/vizro-core/tests/unit/vizro/models/_navigation/test_navigation.py
+++ b/vizro-core/tests/unit/vizro/models/_navigation/test_navigation.py
@@ -92,7 +92,9 @@ def test_non_default_nav_selector_pags_as_dict(self, pages_as_dict, built_nav_li
         navigation = vm.Navigation(pages=pages_as_dict, nav_selector=vm.NavBar())
         navigation.pre_build()
         built_navigation = navigation.build(active_page_id="Page 1")
-        assert_component_equal(built_navigation["nav-bar"], dbc.Navbar(id="nav-bar"), keys_to_strip={"children"})
+        assert_component_equal(
+            built_navigation["nav-bar"], dbc.Navbar(id="nav-bar", className="flex-column"), keys_to_strip={"children"}
+        )
         assert_component_equal(built_navigation["nav-panel"], dbc.Nav(id="nav-panel"), keys_to_strip={"children"})
         assert_component_equal(built_navigation["nav-panel"].children, [dbc.Accordion()], keys_to_strip=STRIP_ALL)
 
@@ -100,7 +102,9 @@ def test_non_default_nav_selector_pages_as_list(self, pages_as_list):
         navigation = vm.Navigation(pages=pages_as_list, nav_selector=vm.NavBar())
         navigation.pre_build()
         built_navigation = navigation.build(active_page_id="Page 1")
-        assert_component_equal(built_navigation["nav-bar"], dbc.Navbar(id="nav-bar"), keys_to_strip={"children"})
+        assert_component_equal(
+            built_navigation["nav-bar"], dbc.Navbar(id="nav-bar", className="flex-column"), keys_to_strip={"children"}
+        )
         assert_component_equal(
             built_navigation["nav-panel"],
             dbc.Nav(id="nav-panel", className="d-none invisible"),