diff --git a/apps/client/src/layouts/desktop_layout.tsx b/apps/client/src/layouts/desktop_layout.tsx
index d33799669..17c77f8d8 100644
--- a/apps/client/src/layouts/desktop_layout.tsx
+++ b/apps/client/src/layouts/desktop_layout.tsx
@@ -3,7 +3,7 @@ import { DESKTOP_FLOATING_BUTTONS } from "../widgets/FloatingButtonsDefinitions.
 import ApiLog from "../widgets/api_log.jsx";
 import ClosePaneButton from "../widgets/buttons/close_pane_button.js";
 import CloseZenModeButton from "../widgets/close_zen_button.jsx";
-import ContentHeader from "../widgets/containers/content-header.js";
+import ContentHeader from "../widgets/containers/content_header.js";
 import CreatePaneButton from "../widgets/buttons/create_pane_button.js";
 import FindWidget from "../widgets/find.js";
 import FlexContainer from "../widgets/containers/flex_container.js";
diff --git a/apps/client/src/layouts/mobile_layout.tsx b/apps/client/src/layouts/mobile_layout.tsx
index 2024d4580..c51ef9e92 100644
--- a/apps/client/src/layouts/mobile_layout.tsx
+++ b/apps/client/src/layouts/mobile_layout.tsx
@@ -10,7 +10,7 @@ import LauncherContainer from "../widgets/containers/launcher_container.js";
 import MobileDetailMenu from "../widgets/mobile_widgets/mobile_detail_menu.js";
 import NoteList from "../widgets/collections/NoteList.jsx";
 import NoteTitleWidget from "../widgets/note_title.js";
-import ContentHeader from "../widgets/containers/content-header.js";
+import ContentHeader from "../widgets/containers/content_header.js";
 import NoteTreeWidget from "../widgets/note_tree.js";
 import NoteWrapperWidget from "../widgets/note_wrapper.js";
 import PromotedAttributesWidget from "../widgets/promoted_attributes.js";
diff --git a/apps/client/src/widgets/containers/content-header.ts b/apps/client/src/widgets/containers/content_header.ts
similarity index 97%
rename from apps/client/src/widgets/containers/content-header.ts
rename to apps/client/src/widgets/containers/content_header.ts
index a014b37c1..ac001d40a 100644
--- a/apps/client/src/widgets/containers/content-header.ts
+++ b/apps/client/src/widgets/containers/content_header.ts
@@ -15,6 +15,7 @@ export default class ContentHeader extends Container<BasicWidget> {
     constructor() {
         super();
 
+        this.class("content-header-widget");
         this.css("contain", "unset");
         this.resizeObserver = new ResizeObserver(this.onResize.bind(this));
     }