diff --git a/addons/web/static/src/js/fields/relational_fields.js b/addons/web/static/src/js/fields/relational_fields.js
index 0f247ba3a8d..13e58095d40 100644
--- a/addons/web/static/src/js/fields/relational_fields.js
+++ b/addons/web/static/src/js/fields/relational_fields.js
@@ -2471,10 +2471,14 @@ var FieldSelection = AbstractField.extend({
      */
     _renderEdit: function () {
         this.$el.empty();
+        var required = this.attrs.modifiersValue && this.attrs.modifiersValue.required;
         for (var i = 0 ; i < this.values.length ; i++) {
+            var disabled = required && this.values[i][0] === false;
+
             this.$el.append($('<option/>', {
                 value: JSON.stringify(this.values[i][0]),
-                text: this.values[i][1]
+                text: this.values[i][1],
+                style: disabled ? "display: none" : "",
             }));
         }
         var value = this.value;
@@ -2513,9 +2517,7 @@ var FieldSelection = AbstractField.extend({
                 return v[0] === false && v[1] === '';
             });
         }
-        if (!this.attrs.modifiersValue || !this.attrs.modifiersValue.required) {
-            this.values = [[false, this.attrs.placeholder || '']].concat(this.values);
-        }
+        this.values = [[false, this.attrs.placeholder || '']].concat(this.values);
     },
 
     //--------------------------------------------------------------------------
diff --git a/addons/web/static/tests/fields/relational_fields_tests.js b/addons/web/static/tests/fields/relational_fields_tests.js
index 9c60f7f5ca1..7aacbafc259 100644
--- a/addons/web/static/tests/fields/relational_fields_tests.js
+++ b/addons/web/static/tests/fields/relational_fields_tests.js
@@ -1189,7 +1189,7 @@ QUnit.module('relational_fields', {
     });
 
     QUnit.test('required selection widget should not have blank option', async function (assert) {
-        assert.expect(3);
+        assert.expect(12);
 
         this.data.partner.fields.feedback_value = {
             type: "selection",
@@ -1210,15 +1210,38 @@ QUnit.module('relational_fields', {
         });
 
         await testUtils.form.clickEdit(form);
-        assert.strictEqual(form.$('.o_field_widget[name=color]')[0].options.length, 3,
-            "non required selection field must have 3 options 1 blank option and 2 value options");
-        assert.strictEqual(form.$('.o_field_widget[name=feedback_value]')[0].options.length, 2,
-            "should have only 2 options without blank option");
+
+        var $colorField = form.$('.o_field_widget[name=color]');
+        assert.containsN($colorField, 'option', 3, "Three options in non required field");
+
+        assert.hasAttrValue($colorField.find('option:first()'), 'style', "",
+            "Should not have display=none");
+        assert.hasAttrValue($colorField.find('option:eq(1)'), 'style', "",
+            "Should not have display=none");
+        assert.hasAttrValue($colorField.find('option:eq(2)'), 'style', "",
+            "Should not have display=none");
+
+        const $requiredSelect = form.$('.o_field_widget[name=feedback_value]');
+
+        assert.containsN($requiredSelect, 'option', 3, "Three options in required field");
+        assert.hasAttrValue($requiredSelect.find('option:first()'), 'style', "display: none",
+            "Should have display=none");
+        assert.hasAttrValue($requiredSelect.find('option:eq(1)'), 'style', "",
+            "Should not have display=none");
+        assert.hasAttrValue($requiredSelect.find('option:eq(2)'), 'style', "",
+            "Should not have display=none");
 
         // change value to update widget modifier values
-        await testUtils.fields.editSelect(form.$('.o_field_widget[name=feedback_value]'), '"bad"');
-        assert.strictEqual(form.$('.o_field_widget[name=color]')[0].options.length, 2,
-            "should have only 2 options");
+        await testUtils.fields.editSelect($requiredSelect, '"bad"');
+        $colorField = form.$('.o_field_widget[name=color]');
+
+        assert.containsN($colorField, 'option', 3, "Three options in required field");
+        assert.hasAttrValue($colorField.find('option:first()'), 'style', "display: none",
+            "Should have display=none");
+        assert.hasAttrValue($colorField.find('option:eq(1)'), 'style', "",
+            "Should not have display=none");
+        assert.hasAttrValue($colorField.find('option:eq(2)'), 'style', "",
+            "Should not have display=none");
 
         form.destroy();
     });