diff --git a/addons/web/static/src/xml/base.xml b/addons/web/static/src/xml/base.xml
index 29030241204..405646c98f0 100644
--- a/addons/web/static/src/xml/base.xml
+++ b/addons/web/static/src/xml/base.xml
@@ -211,7 +211,7 @@
 
 <t t-name="WebClient.DebugManager">
     <li class="o_debug_manager">
-        <a href="#" title="Open Developer Tools" class="dropdown-toggle" data-toggle="dropdown">
+        <a href="#" title="Open Developer Tools" class="dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
             <span class="fa fa-bug"/>
         </a>
         <ul class="dropdown-menu o_debug_dropdown" role="menu"/>
@@ -326,7 +326,7 @@
 <t t-name="Sidebar">
     <t t-foreach="widget.sections" t-as="section">
         <div class="btn-group o_dropdown">
-            <button t-if="section.name != 'buttons'" class="o_dropdown_toggler_btn btn btn-sm dropdown-toggle" data-toggle="dropdown">
+            <button t-if="section.name != 'buttons'" class="o_dropdown_toggler_btn btn btn-sm dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
                 <t t-if="section.name == 'files'" t-raw="widget.items[section.name].length || ''"/>
                 <t t-esc="section.label"/> <span class="caret"/>
             </button>
@@ -505,7 +505,7 @@
 </form>
 <t t-name="GraphView.buttons">
     <div class="btn-group btn-group-sm" role="group">
-        <button class="btn btn-primary btn-sm dropdown-toggle" data-toggle="dropdown">
+        <button class="btn btn-primary btn-sm dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
             Measures <span class="caret"/>
         </button>
         <ul class="dropdown-menu o_graph_measures_list">
@@ -532,7 +532,7 @@
 </div>
 <t t-name="PivotView.buttons">
     <div class="btn-group btn-group-sm" role="group">
-        <button class="btn btn-primary btn-sm dropdown-toggle" data-toggle="dropdown">
+        <button class="btn btn-primary btn-sm dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
             Measures <span class="caret"/>
         </button>
         <ul class="dropdown-menu o_pivot_measures_list">
@@ -876,7 +876,7 @@
                 <t t-call="FieldStatus.content.button"/>
             </li>
         </ul>
-        <button type="button" class="btn btn-sm o_arrow_button btn-default dropdown-toggle" data-toggle="dropdown">More <span class="caret"/></button>
+        <button type="button" class="btn btn-sm o_arrow_button btn-default dropdown-toggle" data-toggle="dropdown" aria-expanded="false">More <span class="caret"/></button>
     </t>
     <t t-foreach="selection_unfolded.reverse()" t-as="i">
         <t t-call="FieldStatus.content.button"/>
@@ -1009,7 +1009,7 @@
     <ul class="dropdown-menu o_searchview_autocomplete" role="menu"></ul>
 </t>
 <div t-name="SearchView.FilterMenu" class="btn-group o_dropdown">
-    <button class="o_dropdown_toggler_btn btn btn-sm dropdown-toggle" data-toggle="dropdown">
+    <button class="o_dropdown_toggler_btn btn btn-sm dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
         <span class="fa fa-filter"/> Filters <span class="caret"/>
     </button>
     <ul class="dropdown-menu o_filters_menu" role="menu">
@@ -1121,7 +1121,7 @@
     </select>
 </t>
 <div t-name="SearchView.GroupByMenu" class="btn-group hidden-xs o_dropdown">
-    <button class="o_dropdown_toggler_btn btn btn-sm dropdown-toggle" data-toggle="dropdown">
+    <button class="o_dropdown_toggler_btn btn btn-sm dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
         <span class="fa fa-bars"/> Group By <span class="caret"/>
     </button>
     <ul class="dropdown-menu o_group_by_menu" role="menu">
@@ -1142,7 +1142,7 @@
     </li>
 </t>
 <div t-name="SearchView.FavoriteMenu" class="btn-group o_dropdown">
-    <button class="o_dropdown_toggler_btn btn btn-sm dropdown-toggle" data-toggle="dropdown">
+    <button class="o_dropdown_toggler_btn btn btn-sm dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
         <span class="fa fa-star"/> Favorites <span class="caret"/>
     </button>
     <ul class="dropdown-menu o_favorites_menu" role="menu">
@@ -1271,7 +1271,7 @@
     <span class="o_stat_text"><t t-esc="text"/></span>
 </t>
 <t t-name="toggle_button">
-    <button type="button" class="o_icon_button" t-att-title="widget.string">
+    <button type="button" class="o_icon_button" t-att-title="widget.string" t-att-aria-label="widget.string">
         <i class="fa fa-circle" t-att-title="widget.string"/>
     </button>
 </t>
@@ -1286,8 +1286,8 @@
             <t t-set="att_prev" t-value="{'accesskey': 'p'}" />
             <t t-set="att_next" t-value="{'accesskey': 'n'}" />
         </t>
-        <button type="button" class="fa fa-chevron-left btn btn-icon o_pager_previous" t-att="att_prev"/>
-        <button type="button" class="fa fa-chevron-right btn btn-icon o_pager_next" t-att="att_next"/>
+        <button type="button" class="fa fa-chevron-left btn btn-icon o_pager_previous" t-att="att_prev" aria-label="Previous"/>
+        <button type="button" class="fa fa-chevron-right btn btn-icon o_pager_next" t-att="att_next" aria-label="Next"/>
     </span>
 </div>