--- /dev/null
+--TEST--
+"filename" autoescape strategy
+--TEMPLATE--
+{{ br -}}
+{{ include('index.html.twig') -}}
+{{ include('index.txt.twig') -}}
+--TEMPLATE(index.html.twig)--
+{{ br -}}
+--TEMPLATE(index.txt.twig)--
+{{ br -}}
+--DATA--
+return array('br' => '<br />')
+--CONFIG--
+return array('autoescape' => 'filename')
+--EXPECT--
+<br />
+<br />
+<br />