--- a/tests/test-clone-cgi.t	Thu Jun 15 14:22:39 2017 -0400
+++ b/tests/test-clone-cgi.t	Tue Jun 20 09:45:02 2017 -0400
@@ -27,7 +27,7 @@
   $ . "$TESTDIR/cgienv"
   $ QUERY_STRING="cmd=changegroup&roots=0000000000000000000000000000000000000000"; export QUERY_STRING
   $ python hgweb.cgi >page1 2>&1
-  $ python "$TESTDIR/md5sum.py" page1
+  $ $PYTHON "$TESTDIR/md5sum.py" page1
   1f424bb22ec05c3c6bc866b6e67efe43  page1
 
 make sure headers are sent even when there is no body