--- a/tests/test-prev-next.t	Sun Jan 21 16:46:31 2018 -0500
+++ b/tests/test-prev-next.t	Sun Jan 21 16:55:02 2018 -0500
@@ -243,7 +243,7 @@
 
   $ hg init repo
   $ cd repo
-  $ HGEDITOR=${TESTDIR}/fake-editor.sh
+  $ HGEDITOR="sh ${TESTDIR}/fake-editor.sh"
   $ echo hi > foo
   $ hg ci -Am 'one'
   adding foo