diff --git a/tests/test_hub/test_delete_tag.py b/tests/test_hub/test_delete_tag.py
new file mode 100644
index 00000000..76875e26
--- /dev/null
+++ b/tests/test_hub/test_delete_tag.py
@@ -0,0 +1,50 @@
+import mock
+import unittest
+
+import koji
+import kojihub
+
+UP = kojihub.UpdateProcessor
+
+
+class TestDeleteTag(unittest.TestCase):
+
+    def getUpdate(self, *args, **kwargs):
+        update = UP(*args, **kwargs)
+        update.execute = mock.MagicMock()
+        self.updates.append(update)
+        return update
+
+    def setUp(self):
+        self.UpdateProcessor = mock.patch('kojihub.UpdateProcessor',
+                                          side_effect=self.getUpdate).start()
+        self.updates = []
+        self.get_tag = mock.patch('kojihub.get_tag').start()
+        self.context = mock.patch('kojihub.context').start()
+        # It seems MagicMock will not automatically handle attributes that
+        # start with "assert"
+        self.context.session.assertPerm = mock.MagicMock()
+        self.context.session.assertLogin = mock.MagicMock()
+
+    def tearDown(self):
+        mock.patch.stopall()
+
+    def test_bad_tag(self):
+        self.get_tag.side_effect = koji.GenericError("FOO")
+        with self.assertRaises(koji.GenericError):
+            kojihub.delete_tag('badtag')
+        self.assertEqual(self.updates, [])
+        self.context.session.assertPerm.assert_called_with('admin')
+
+    def test_good_tag(self):
+        self.get_tag.return_value = {'id': 'TAGID'}
+        self.context.event_id = "12345"
+        self.context.session.user_id = "42"
+        data = {'revoker_id': '42', 'revoke_event': '12345'}
+        kojihub.delete_tag('goodtag')
+        for u in self.updates:
+            # all should be revokes
+            self.assertEqual(u.values, {'value': 'TAGID'})
+            self.assertEqual(u.rawdata, {'active': 'NULL'})
+            self.assertEqual(u.data, data)
+        self.context.session.assertPerm.assert_called_with('admin')