diff --git a/lib/Twig/SimpleFilter.php b/lib/Twig/SimpleFilter.php
index d39244e6e..2c885ed88 100644
--- a/lib/Twig/SimpleFilter.php
+++ b/lib/Twig/SimpleFilter.php
@@ -19,5 +19,3 @@ if (false) {
     {
     }
 }
-
-class_alias('Twig_SimpleFilter', 'Twig\TwigFilter', false);
diff --git a/lib/Twig/SimpleFunction.php b/lib/Twig/SimpleFunction.php
index bbd392616..eebef8643 100644
--- a/lib/Twig/SimpleFunction.php
+++ b/lib/Twig/SimpleFunction.php
@@ -19,5 +19,3 @@ if (false) {
     {
     }
 }
-
-class_alias('Twig_SimpleFunction', 'Twig\TwigFunction', false);
diff --git a/lib/Twig/SimpleTest.php b/lib/Twig/SimpleTest.php
index f0f1be029..3b4cf0d32 100644
--- a/lib/Twig/SimpleTest.php
+++ b/lib/Twig/SimpleTest.php
@@ -19,5 +19,3 @@ if (false) {
     {
     }
 }
-
-class_alias('Twig_SimpleTest', 'Twig\TwigTest', false);