--- a/tests/test-bisect.t	Wed Nov 16 03:45:14 2011 +0100
+++ b/tests/test-bisect.t	Wed Nov 16 03:45:14 2011 +0100
@@ -1,3 +1,5 @@
+  $ "$TESTDIR/hghave" system-sh || exit 80
+
   $ hg init