diff --git a/core/lib/Drupal/Core/Template/TwigEnvironment.php b/core/lib/Drupal/Core/Template/TwigEnvironment.php
index 2b7393b..a1abf84 100644
--- a/core/lib/Drupal/Core/Template/TwigEnvironment.php
+++ b/core/lib/Drupal/Core/Template/TwigEnvironment.php
@@ -38,7 +38,7 @@ class TwigEnvironment extends \Twig_Environment {
   protected $storage = NULL;
 
   /**
-   * The base template cache filename prefix.
+   * The template cache filename prefix.
    *
    * @var string
    */
@@ -117,6 +117,10 @@ public function getCacheFilename($name) {
     // twig extensions, so we need to take into account the \Drupal::VERSION
     // deployment identifier, much like for the container itself.
 
+    if (!$this->cache) {
+      return FALSE;
+    }
+
     $class = substr($this->getTemplateClass($name), strlen($this->templateClassPrefix));
 
     // Just check the list of loaded extensions once.