diff --git a/core/modules/options/src/Tests/OptionsWidgetsTest.php b/core/modules/options/src/Tests/OptionsWidgetsTest.php
index c140058..a229fa7 100644
--- a/core/modules/options/src/Tests/OptionsWidgetsTest.php
+++ b/core/modules/options/src/Tests/OptionsWidgetsTest.php
@@ -460,6 +460,8 @@ function testEmptyValue() {
       'bundle' => 'entity_test',
     ]);
     $field->save();
+
+    // Change it to the check boxes/radio buttons widget.
     entity_get_form_display('entity_test', 'entity_test', 'default')
       ->setComponent($this->card1->getName(), [
         'type' => 'options_test_buttons',
@@ -473,19 +475,19 @@ function testEmptyValue() {
     ]);
     $entity->save();
 
-    // Display form.
+    // Display form: check that _none options are present and has label.
     $this->drupalGet('entity_test/manage/' . $entity->id());
     $this->assertTrue($this->xpath('//div[@id=:id]//div[@class=:class]//input[@value=:value]', array(':id' => 'edit-card-1', ':class' => 'form-item form-type-radio form-item-card-1', ':value' => '_none')), 'A test radio button has a "None" choice.');
     $this->assertTrue($this->xpath('//div[@id=:id]//div[@class=:class]//label[@for=:for and text()=:label]', array(':id' => 'edit-card-1', ':class' => 'form-item form-type-radio form-item-card-1', ':for' => 'edit-card-1-none', ':label' => 'N/A')), 'A test radio button has a "N/A" choice.');
 
-    //
+    // Change it to the select widget.
     entity_get_form_display('entity_test', 'entity_test', 'default')
       ->setComponent($this->card1->getName(), array(
         'type' => 'options_test_select',
       ))
       ->save();
 
-    // Display form.
+    // Display form: check that _none options are present and has label.
     $this->drupalGet('entity_test/manage/' . $entity->id());
     // A required field without any value has a "none" option.
     $this->assertTrue($this->xpath('//select[@id=:id]//option[@value="_none" and text()=:label]', array(':id' => 'edit-card-1', ':label' => t('- None -'))), 'A test select has a "None" choice.');