large_file is a new feature we can require for a specific test
diff --git a/tests/FILEFORMAT b/tests/FILEFORMAT
index c1d5072..714a289 100644
--- a/tests/FILEFORMAT
+++ b/tests/FILEFORMAT
@@ -67,6 +67,7 @@
 to be able to run. Features testable here are:
 SSL
 netrc_debug
+large_file
 </features>
 
 <killserver>