--- a
+++ b/qiita_pet/test/test_ontology.py
@@ -0,0 +1,25 @@
+# -----------------------------------------------------------------------------
+# Copyright (c) 2014--, The Qiita Development Team.
+#
+# Distributed under the terms of the BSD 3-clause License.
+#
+# The full license is in the file LICENSE, distributed with this software.
+# -----------------------------------------------------------------------------
+
+from unittest import main
+from json import loads
+
+from qiita_pet.test.tornado_test_base import TestHandlerBase
+
+
+class TestOntologyHandler(TestHandlerBase):
+    def test_patch(self):
+        arguments = {'op': 'add', 'path': 'ENA', 'value': 'new-term'}
+        response = self.patch('/ontology/', data=arguments)
+        self.assertEqual(response.code, 200)
+        exp = {'status': 'success', 'message': ''}
+        self.assertEqual(loads(response.body), exp)
+
+
+if __name__ == '__main__':
+    main()