diff --git a/core/lib/Drupal/Core/Template/TwigEnvironment.php b/core/lib/Drupal/Core/Template/TwigEnvironment.php
index 762271f..06f3def 100644
--- a/core/lib/Drupal/Core/Template/TwigEnvironment.php
+++ b/core/lib/Drupal/Core/Template/TwigEnvironment.php
@@ -10,7 +10,6 @@
 use Drupal\Core\PhpStorage\PhpStorageFactory;
 use Drupal\Core\Extension\ModuleHandlerInterface;
 use Drupal\Core\Extension\ThemeHandlerInterface;
-use LogicException;
 
 /**
  * A class that defines a Twig environment for Drupal.
@@ -75,11 +74,11 @@ public function __construct(\Twig_LoaderInterface $loader = NULL, $options = arr
   /**
    * Checks if the compiled template needs an update.
    */
-  public function needsUpdate($cache_filename, $name) {
+  public function isFresh($cache_filename, $name) {
     $cid = 'twig:' . $cache_filename;
     $obj = $this->cache_object->get($cid);
     $mtime = isset($obj->data) ? $obj->data : FALSE;
-    return $mtime !== FALSE && !$this->isTemplateFresh($name, $mtime);
+    return $mtime === FALSE || $this->isTemplateFresh($name, $mtime);
   }
 
   /**
@@ -106,8 +105,8 @@ public function updateCompiledTemplate($cache_filename, $name, $inline = FALSE)
    * @return \Twig_LoaderInterface A Twig_LoaderInterface instance
    */
   public function getLoader($inline = FALSE) {
-    if (NULL === $this->loader) {
-      throw new LogicException('You must set a loader first.');
+    if (!isset($this->loader)) {
+      throw new \LogicException('You must set a loader first.');
     }
     return $inline ? $this->stringLoader : $this->loader;
   }
@@ -153,7 +152,7 @@ public function loadTemplate($name, $index = NULL, $inline = FALSE) {
 
         // If autoreload is on, check that the template has not been
         // modified since the last compilation.
-        if ($this->isAutoReload() && $this->needsUpdate($cache_filename, $name)) {
+        if ($this->isAutoReload() && !$this->isFresh($cache_filename, $name)) {
           $this->updateCompiledTemplate($cache_filename, $name, $inline);
         }