--- a/tests/test-commit-interactive.t	Thu Jun 15 14:22:39 2017 -0400
+++ b/tests/test-commit-interactive.t	Tue Jun 20 09:45:02 2017 -0400
@@ -909,7 +909,7 @@
   >     sys.stdout.write(''.join(escape(c) for c in l))
   > EOF
 
-  $ hg commit -i --encoding cp932 2>&1 <<EOF | python $TESTTMP/escape.py | grep '^y - '
+  $ hg commit -i --encoding cp932 2>&1 <<EOF | $PYTHON $TESTTMP/escape.py | grep '^y - '
   > ?
   > q
   > EOF