--- a/tests/test-http-branchmap.t	Tue Jun 20 17:25:57 2017 -0400
+++ b/tests/test-http-branchmap.t	Tue Jun 20 17:31:18 2017 -0400
@@ -87,7 +87,7 @@
   > EOF
   $ echo baz >> b/foo
   $ hg -R b ci -m baz
-  $ hg push -R b -e 'python oldhg' ssh://dummy/ --encoding latin1
+  $ hg push -R b -e '$PYTHON oldhg' ssh://dummy/ --encoding latin1
   pushing to ssh://dummy/
   searching for changes
   remote: adding changesets