diff --git a/tester.py b/tester.py
index a28f21d13ba95851dcdb8e303c7d42aaacac4588..295f406145df60ee8f0d3fccbe4a7e735efa59ff 100755
--- a/tester.py
+++ b/tester.py
@@ -173,7 +173,7 @@ Content-transfer-encoding: utf-8
 %(report)s
 
 --%(boundary)s
-Content-type: application/octet-stream; name="%(log_name)s"
+Content-type: text/plain; name="%(log_name)s"
 Content-disposition: attachment; filename="%(log_name)s"
 Content-transfer-encoding: utf-8