--- a/tests/test-revlog-v2.t	Mon Jun 18 15:23:25 2018 +0530
+++ b/tests/test-revlog-v2.t	Mon Jun 18 15:24:17 2018 +0530
@@ -31,7 +31,7 @@
 Unknown flags to revlog are rejected
 
   >>> with open('.hg/store/00changelog.i', 'wb') as fh:
-  ...     fh.write(b'\x00\x04\xde\xad')
+  ...     fh.write(b'\x00\x04\xde\xad') and None
 
   $ hg log
   abort: unknown flags (0x04) in version 57005 revlog 00changelog.i!