diff --git a/test/zdtm.py b/test/zdtm.py
index fa900d020..0ba18d4b5 100755
--- a/test/zdtm.py
+++ b/test/zdtm.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env python2
-# vim: noet
+# vim: noet ts=8 sw=8 sts=8
 import argparse
 import glob
 import os