diff --git a/tests/data/test31 b/tests/data/test31
index 437317654..879cd62a8 100644
--- a/tests/data/test31
+++ b/tests/data/test31
@@ -55,7 +55,7 @@ Pragma: no-cache
 Accept: */*
 
 </protocol>
-<file name="log/jar31.txt">
+<file name="log/jar31.txt" mode=text>
 # Netscape HTTP Cookie File
 # http://www.netscape.com/newsref/std/cookie_spec.html
 # This file was generated by libcurl! Edit at your own risk.