diff --git a/ui/webui/src/components/storage/MountPointMapping.jsx b/ui/webui/src/components/storage/MountPointMapping.jsx
index 3e55f1242d2..30acf5910d8 100644
--- a/ui/webui/src/components/storage/MountPointMapping.jsx
+++ b/ui/webui/src/components/storage/MountPointMapping.jsx
@@ -253,7 +253,7 @@ const FormatColumn = ({ deviceData, handleRequestChange, idPrefix, request, requ
     };
 
     return (
-        <Flex>
+        <Flex id={idPrefix}>
             {!isRootMountPoint &&
                 <FormatSwitch />}
             {isRootMountPoint &&