diff --git a/core/modules/content_translation/src/Tests/ContentTranslationContextualLinksTest.php b/core/modules/content_translation/src/Tests/ContentTranslationContextualLinksTest.php
index 36a0d20..d264e47 100644
--- a/core/modules/content_translation/src/Tests/ContentTranslationContextualLinksTest.php
+++ b/core/modules/content_translation/src/Tests/ContentTranslationContextualLinksTest.php
@@ -71,9 +71,7 @@ protected function setUp() {
     $this->bundle = $this->randomMachineName();
     $this->contentType = $this->drupalCreateContentType(array('type' => $this->bundle));
 
-    // Add a field to the content type. This will be made translatable by the
-    // test through the UI. This is important because it tests that caches are
-    // cleared as expected when doing this.
+    // Add a field to the content type. The field is not yet translatable.
     entity_create('field_storage_config', array(
       'field_name' => 'field_test_text',
       'entity_type' => 'node',
@@ -112,7 +110,8 @@ public function testContentTranslationContextualLinks() {
     $this->drupalCreateNode(array('type' => $this->bundle, 'title' => $title, 'langcode' => 'en'));
     $node = $this->drupalGetNodeByTitle($title);
 
-    // Set up the node type and field to be translatable through the UI.
+    // Use a UI form sumission to make the node type and field translatable.
+    // This tests that caches are properly invalidated.
     $this->drupalLogin($this->rootUser);
     $edit = array(
       'entity_types[node]' => TRUE,