diff --git a/tests/util/test_init.py b/tests/util/test_init.py
index d6d583342d7..3ccb72920d4 100644
--- a/tests/util/test_init.py
+++ b/tests/util/test_init.py
@@ -31,6 +31,12 @@ class TestUtil(unittest.TestCase):
         self.assertEqual("test_more", util.slugify("Test More"))
         self.assertEqual("test_more", util.slugify("Test_(More)"))
         self.assertEqual("test_more", util.slugify("Tèst_Mörê"))
+        self.assertEqual("b827eb000000", util.slugify("B8:27:EB:00:00:00"))
+        self.assertEqual("testcom", util.slugify("test.com"))
+        self.assertEqual("greg_phone__exp_wayp1",
+                         util.slugify("greg_phone - exp_wayp1"))
+        self.assertEqual("we_are_we_are_a_test_calendar",
+                         util.slugify("We are, we are, a... Test Calendar"))
 
     def test_repr_helper(self):
         """Test repr_helper."""