diff --git a/tests/T-null.at b/tests/T-null.at
index dc7c8ee1..206f5e81 100644
--- a/tests/T-null.at
+++ b/tests/T-null.at
@@ -41,6 +41,6 @@ tar cfTv archive file-list | sort
 trzy
 ],
 [tar: file-list: file name read contains nul character
-],[],[ustar]) # Testing one format is enough
+],[],[],[ustar]) # Testing one format is enough
 
 AT_CLEANUP