diff --git a/src/explorer.html b/src/explorer.html
index 263e6ab98..7dd3eab5b 100644
--- a/src/explorer.html
+++ b/src/explorer.html
@@ -106,6 +106,7 @@
                                                 click: onRefreshResourcesClick, clickBubble: false, event: { keypress: onRefreshDatabasesKeyPress }"
                           tabindex="0"
                           aria-label="Refresh tree"
+                          title="Refresh tree"
                         >
                           <img
                             class="refreshcol"
@@ -121,6 +122,7 @@
                                                 click: toggleLeftPaneExpanded, event: { keypress: toggleLeftPaneExpandedKeyPress }"
                           tabindex="0"
                           aria-label="Collapse Tree"
+                          title="Collapse Tree"
                         >
                           <img class="refreshcol1" src="/imgarrowlefticon.svg" alt="Hide" />
                         </span>