diff --git a/tests/test-acl b/tests/test-acl
--- a/tests/test-acl
+++ b/tests/test-acl
@@ -44,7 +44,7 @@ pretxnchangegroup.acl = python:hgext.acl
 [acl]
 sources = push
 [extensions]
-f=$PWD/fakegroups.py
+f=`pwd`/fakegroups.py
 EOF
 }