--- a/tests/test-bisect.t	Tue Jun 20 09:33:19 2017 -0400
+++ b/tests/test-bisect.t	Thu Jun 15 14:27:52 2017 -0400
@@ -453,7 +453,7 @@
 test bisecting command
 
   $ cat > script.py <<EOF
-  > #!/usr/bin/env python
+  > #!$PYTHON
   > import sys
   > from mercurial import ui, hg
   > repo = hg.repository(ui.ui.load(), '.')