new file mode 100755
--- /dev/null
+++ b/tests/test-bad-extension
@@ -0,0 +1,9 @@
+#!/bin/sh
+
+echo 'syntax error' > badext.py
+abspath=`pwd`/badext.py
+
+echo '[extensions]' >> $HGRCPATH
+echo "badext = $abspath" >> $HGRCPATH
+
+hg -q help help