diff --git a/core/modules/field/src/Tests/String/StringFieldTest.php b/core/modules/field/src/Tests/String/StringFieldTest.php
index f9a6df2..7f52794 100644
--- a/core/modules/field/src/Tests/String/StringFieldTest.php
+++ b/core/modules/field/src/Tests/String/StringFieldTest.php
@@ -33,13 +33,13 @@ class StringFieldTest extends WebTestBase {
    */
   public static $modules = array('entity_test');
 
-  protected $web_user;
+  protected $webUser;
 
   protected function setUp() {
     parent::setUp();
 
-    $this->web_user = $this->drupalCreateUser(array('view test entity', 'administer entity_test content'));
-    $this->drupalLogin($this->web_user);
+    $this->webUser = $this->drupalCreateUser(array('view test entity', 'administer entity_test content'));
+    $this->drupalLogin($this->webUser);
   }
 
   // Test fields.