Support file extensions in base tokenization file

Change-Id: I02a2bcba87998c99d496e1e394093ae9483ddb04
diff --git a/t/script/base.t b/t/script/base.t
index 326f4e6..08baa64 100644
--- a/t/script/base.t
+++ b/t/script/base.t
@@ -29,7 +29,7 @@
   '--input' => $input,
   '--output' => $output,
   '--cache' => $cache,
-  '-t' => 'Base#tokens_aggr',
+  '-t' => 'Base#tokens_aggr.xml',
   '-bs' => 'DeReKo#Structure',
   '-bp' => 'DeReKo#Structure',
   '-l' => 'INFO'