diff --git a/code/ui/manager/src/components/sidebar/Refs.tsx b/code/ui/manager/src/components/sidebar/Refs.tsx
index 04f90148f7b8..1cd5c6c7a5a0 100644
--- a/code/ui/manager/src/components/sidebar/Refs.tsx
+++ b/code/ui/manager/src/components/sidebar/Refs.tsx
@@ -67,6 +67,7 @@ const CollapseButton = styled.button(({ theme }) => ({
   gap: 6,
   alignItems: 'center',
   cursor: 'pointer',
+  overflow: 'hidden',
 
   '&:focus': {
     borderColor: theme.color.secondary,