diff --git a/packages/volto/src/components/manage/Widgets/SchemaWidget.jsx b/packages/volto/src/components/manage/Widgets/SchemaWidget.jsx
index 1d9f16c003..858266ae8b 100644
--- a/packages/volto/src/components/manage/Widgets/SchemaWidget.jsx
+++ b/packages/volto/src/components/manage/Widgets/SchemaWidget.jsx
@@ -1741,6 +1741,7 @@ class SchemaWidget extends Component {
           <ModalForm
             onSubmit={this.onAddField}
             onCancel={this.onCancel}
+            className={`field-${slugify(this.state.addField || 'label_text_field')}`}
             onChangeFormData={(data) => {
               this.setState({
                 addField: data.factory,
@@ -1782,6 +1783,7 @@ class SchemaWidget extends Component {
             onSubmit={this.onEditField}
             onCancel={this.onCancel}
             title={`${this.props.intl.formatMessage(messages.editField)}: ${editFieldType}`}
+            className={`factory-${slugify(editFieldType)}`}
             formData={{
               ...this.props.value.properties[this.state.editField.id],
               id: this.state.editField.id,