diff --git a/lib/svtplay_dl/tests/utils.py b/lib/svtplay_dl/tests/utils.py
new file mode 100644
index 0000000..b912a68
--- /dev/null
+++ b/lib/svtplay_dl/tests/utils.py
@@ -0,0 +1,23 @@
+#!/usr/bin/python
+# ex:ts=4:sw=4:sts=4:et
+# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
+
+# The unittest framwork doesn't play nice with pylint:
+#   pylint: disable-msg=C0103
+
+from __future__ import absolute_import
+import unittest
+import svtplay_dl.utils
+
+class timestrTest(unittest.TestCase):
+    def test_1(self):
+        self.assertEqual(svtplay_dl.utils.timestr(1), "00:00:00,00")
+
+    def test_100(self):
+        self.assertEqual(svtplay_dl.utils.timestr(100), "00:00:00,10")
+
+    def test_3600(self):
+        self.assertEqual(svtplay_dl.utils.timestr(3600), "00:00:03,60")
+
+    def test_3600000(self):
+        self.assertEqual(svtplay_dl.utils.timestr(3600000), "01:00:00,00")