--- a/tests/test-hgweb-non-interactive.t	Tue Sep 18 22:40:03 2018 -0400
+++ b/tests/test-hgweb-non-interactive.t	Tue Sep 18 23:47:21 2018 -0400
@@ -76,7 +76,7 @@
   > with i._obtainrepo() as repo:
   >     print(sorted([x for x in repo.ui.environ if x.startswith(b'wsgi')]))
   > EOF
-  $ $PYTHON request.py
+  $ "$PYTHON" request.py
   ---- STATUS
   200 Script output follows
   ---- HEADERS