--- a/tests/test-convert-bzr.t	Tue Sep 18 22:40:03 2018 -0400
+++ b/tests/test-convert-bzr.t	Tue Sep 18 23:47:21 2018 -0400
@@ -129,10 +129,10 @@
   $ bzr branch -q source source-improve
   $ cd source
   $ echo more >> a
-  $ $PYTHON ../helper.py 'Editing a' 100
+  $ "$PYTHON" ../helper.py 'Editing a' 100
   $ cd ../source-improve
   $ echo content3 >> b
-  $ $PYTHON ../helper.py 'Editing b' 200
+  $ "$PYTHON" ../helper.py 'Editing b' 200
   $ cd ../source
   $ bzr merge -q ../source-improve
   $ bzr commit -q -m 'Merged improve branch'