diff --git a/addons/web/static/src/js/views/graph/graph_model.js b/addons/web/static/src/js/views/graph/graph_model.js
index a6d2b057d0e..0518e279637 100644
--- a/addons/web/static/src/js/views/graph/graph_model.js
+++ b/addons/web/static/src/js/views/graph/graph_model.js
@@ -67,7 +67,6 @@ return AbstractModel.extend({
             domain: params.domain,
             context: params.context,
         };
-        this.defaultGroupedBy = params.groupedBy;
         return this._loadGraph();
     },
     /**
@@ -96,7 +95,7 @@ return AbstractModel.extend({
             this.chart.domain = params.domain;
         }
         if ('groupBy' in params) {
-            this.chart.groupedBy = params.groupBy.length ? params.groupBy : this.defaultGroupedBy;
+            this.chart.groupedBy = params.groupBy.length ? params.groupBy : this.initialGroupBys;
         }
         if ('measure' in params) {
             this.chart.measure = params.measure;
@@ -121,7 +120,7 @@ return AbstractModel.extend({
      * @returns {Deferred}
      */
     _loadGraph: function () {
-        var groupedBy = this.chart.groupedBy.length ? this.chart.groupedBy : this.initialGroupBys;
+        var groupedBy = this.chart.groupedBy;
         var fields = _.map(groupedBy, function (groupBy) {
             return groupBy.split(':')[0];
         });
diff --git a/addons/web/static/tests/views/graph_tests.js b/addons/web/static/tests/views/graph_tests.js
index 07f7d060347..f7d22f27a64 100644
--- a/addons/web/static/tests/views/graph_tests.js
+++ b/addons/web/static/tests/views/graph_tests.js
@@ -90,7 +90,6 @@ QUnit.module('Views', {
         });
     });
 
-
     QUnit.test('default type attribute', function (assert) {
         assert.expect(1);
 
@@ -106,7 +105,6 @@ QUnit.module('Views', {
         graph.destroy();
     });
 
-
     QUnit.test('switching mode', function (assert) {
         assert.expect(6);
 
@@ -191,7 +189,6 @@ QUnit.module('Views', {
         });
     });
 
-
     QUnit.test('no content helper', function (assert) {
         var done = assert.async();
         assert.expect(4);
@@ -442,6 +439,43 @@ QUnit.module('Views', {
 
         graph.destroy();
     });
+
+    QUnit.test('initial groupby is kept when reloading', function (assert) {
+        var done = assert.async();
+        assert.expect(4);
+
+        var graph = createView({
+            View: GraphView,
+            model: 'foo',
+            data: this.data,
+            arch: '<graph>' +
+                    '<field name="product_id" type="row"/>' +
+                    '<field name="foo" type="measure"/>' +
+                '</graph>',
+            mockRPC: function (route, args) {
+                if (args.method === 'read_group') {
+                    assert.deepEqual(args.kwargs.groupby, ['product_id'],
+                        "should group by the correct field");
+                }
+                return this._super.apply(this, arguments);
+            },
+        });
+
+
+        return concurrency.delay(0).then(function () {
+            assert.strictEqual(graph.$('.nv-groups rect').length, 2,
+                "should display two groups");
+
+            graph.reload({groupBy: []});
+            return concurrency.delay(0).then(function () {
+                assert.strictEqual(graph.$('.nv-groups rect').length, 2,
+                    "should still display two groups");
+
+                graph.destroy();
+                done();
+            });
+        });
+    });
 });
 
 });