diff --git a/src/app/root/root.component.html b/src/app/root/root.component.html
index 572be9e7cbf..1ac18a7db33 100644
--- a/src/app/root/root.component.html
+++ b/src/app/root/root.component.html
@@ -5,7 +5,7 @@
   <div class="inner-wrapper">
     <ds-system-wide-alert-banner></ds-system-wide-alert-banner>
     <ds-themed-header-navbar-wrapper></ds-themed-header-navbar-wrapper>
-    <main class="main-content">
+    <main class="main-content" id="main-content">
       <ds-themed-breadcrumbs></ds-themed-breadcrumbs>
 
       <div class="container d-flex justify-content-center align-items-center h-100" *ngIf="shouldShowRouteLoader">
diff --git a/src/app/root/root.component.spec.ts b/src/app/root/root.component.spec.ts
index ab148b8ebd3..9cef43c77cf 100644
--- a/src/app/root/root.component.spec.ts
+++ b/src/app/root/root.component.spec.ts
@@ -74,4 +74,13 @@ describe('RootComponent', () => {
   it('should create', () => {
     expect(component).toBeTruthy();
   });
+
+  // The SSR anti-flicker overlay (src/index.html) is removed event-driven only once
+  // AppComponent.dsAppHasRenderedContent() sees dsApp.querySelector('#main-content') (see
+  // src/app/app.component.ts). If the root template ever drops this id again (as it silently did
+  // on TUL, leaving the overlay to be removed only by the 10s settle cap on every hard reload -> a
+  // frozen, "unresponsive" page), this test fails instead of the regression reaching production.
+  it('renders the #main-content landmark required by the SSR overlay reveal', () => {
+    expect(fixture.nativeElement.querySelector('main#main-content')).not.toBeNull();
+  });
 });