diff --git a/tests/FILEFORMAT b/tests/FILEFORMAT
index 7b8313abc9950399818c799203fb393373438d49..40fab240605501a5565fa072503aaebf0a497854 100644
--- a/tests/FILEFORMAT
+++ b/tests/FILEFORMAT
@@ -51,6 +51,9 @@ changing protocol data such as port numbers or user-agent strings.
 <protocol>
 the protocol dump curl should transmit
 </protocol>
+<file name="log/filename">
+the file's contents must be identical to this
+</file>
 <upload>
 the contents of the upload data curl should have sent
 </upload>