diff --git a/src/platform/packages/shared/kbn-unified-tabs/src/components/tabs_visual_glue_to_app_container/tabs_bar_with_background.tsx b/src/platform/packages/shared/kbn-unified-tabs/src/components/tabs_visual_glue_to_app_container/tabs_bar_with_background.tsx
index 9ffbabab7c902..8883734fe4651 100644
--- a/src/platform/packages/shared/kbn-unified-tabs/src/components/tabs_visual_glue_to_app_container/tabs_bar_with_background.tsx
+++ b/src/platform/packages/shared/kbn-unified-tabs/src/components/tabs_visual_glue_to_app_container/tabs_bar_with_background.tsx
@@ -18,13 +18,10 @@ const globalCss = cssString`
   // Disables the overscroll behavior to prevent the page from bouncing when scrolling
   overscroll-behavior: none;
 
-  // Removes the shadow from the global header.
-  // We add our own shadow to the tabs bar to be able to set a solid color for the selected tab on top of the shadow.
+  // Removes the shadow from the global header
   .header__secondBar,
   [data-test-subj='kibanaProjectHeaderActionMenu'] {
     box-shadow: none;
-    border-bottom: none;
-    border-block-end: none;
   }
 `;