--- a/tests/test-http-bad-server.t	Wed Sep 20 18:29:10 2017 +0200
+++ b/tests/test-http-bad-server.t	Sun Sep 24 21:27:18 2017 +0200
@@ -11,6 +11,8 @@
   $ cat >> $HGRCPATH << EOF
   > [extensions]
   > fakeversion = `pwd`/fakeversion.py
+  > [devel]
+  > legacy.exchange = phases
   > EOF
 
   $ hg init server0