--- a/tests/test-chg.t	Wed Oct 09 20:49:58 2019 -0700
+++ b/tests/test-chg.t	Wed Aug 28 17:45:18 2019 -0700
@@ -127,7 +127,7 @@
   > command = registrar.command(cmdtable)
   > @command(b'crash')
   > def pagercrash(ui, repo, *pats, **opts):
-  >     ui.write('going to crash\n')
+  >     ui.write(b'going to crash\n')
   >     raise Exception('.')
   > EOF