--- /dev/null
+--TEST--
+"extends" tag accepts Twig_Template instance
+--TEMPLATE--
+{% extends foo %}
+
+{% block content %}
+{{ parent() }}FOO
+{% endblock %}
+--TEMPLATE(foo.twig)--
+{% block content %}BAR{% endblock %}
+--DATA--
+return array('foo' => $twig->loadTemplate('foo.twig'))
+--EXPECT--
+BARFOO