fixed tests

test/Twig/Tests/NativeExtensionTest.php

@@ -16,6 +16,10 @@ class Twig_Tests_NativeExtensionTest extends \PHPUnit\Framework\TestCase
      */
     public function testGetProperties()
     {
+        if (PHP_VERSION_ID >= 70000) {
+            $this->markTestSkipped('Extension is not available on PHP 7+');
+        }
+
         $twig = new Twig_Environment(new Twig_Loader_Array(['index' => '{{ d1.date }}{{ d2.date }}']), [
             'debug' => true,
             'cache' => false,