diff --git a/addons/web/static/src/css/base.css b/addons/web/static/src/css/base.css
index 4a2d5f81bb2..eed068c4931 100644
--- a/addons/web/static/src/css/base.css
+++ b/addons/web/static/src/css/base.css
@@ -3056,3 +3056,7 @@ body {
   white-space: nowrap;
   padding-left: 10px;
 }
+
+.nvtooltip thead {
+  background-color: transparent;
+}
diff --git a/addons/web/static/src/css/base.sass b/addons/web/static/src/css/base.sass
index 7ba9e6bece3..37ac418816d 100644
--- a/addons/web/static/src/css/base.sass
+++ b/addons/web/static/src/css/base.sass
@@ -2605,3 +2605,6 @@ body
         width: 100px
         white-space: nowrap
         padding-left: 10px
+
+.nvtooltip thead
+    background-color: transparent
diff --git a/addons/web/static/src/js/views/graph_widget.js b/addons/web/static/src/js/views/graph_widget.js
index d0cd362487d..73b9c6be406 100644
--- a/addons/web/static/src/js/views/graph_widget.js
+++ b/addons/web/static/src/js/views/graph_widget.js
@@ -97,7 +97,8 @@ return Widget.extend({
                     "there is no active filter in the search bar."),
             }));
         } else {
-            this['display_' + this.mode]();
+            var chart = this['display_' + this.mode]();
+            chart.tooltip.chartContainer(this.$el[0]);
         }
     },
     display_bar: function () {
@@ -181,6 +182,8 @@ return Widget.extend({
         chart(svg);
         this.to_remove = chart.update;
         nv.utils.onWindowResize(chart.update);
+
+        return chart;
     },
     display_pie: function () {
         var data = [],
@@ -231,6 +234,8 @@ return Widget.extend({
         chart(svg);
         this.to_remove = chart.update;
         nv.utils.onWindowResize(chart.update);
+
+        return chart;
     },
     display_line: function () {
         if (this.data.length < 2) {
@@ -308,7 +313,9 @@ return Widget.extend({
 
         chart(svg);
         this.to_remove = chart.update;
-        nv.utils.onWindowResize(chart.update);  
+        nv.utils.onWindowResize(chart.update);
+
+        return chart;
     },
     destroy: function () {
         nv.utils.offWindowResize(this.to_remove);