diff --git a/kallithea/tests/api/api_base.py b/kallithea/tests/api/api_base.py
--- a/kallithea/tests/api/api_base.py
+++ b/kallithea/tests/api/api_base.py
@@ -166,7 +166,7 @@ class _BaseTestApi(object):
         id_, params = _build_data('trololo', 'get_user')
         response = api_call(self, params)
 
-        expected = 'Invalid API KEY'
+        expected = 'Invalid API key'
         self._compare_error(id_, expected, given=response.body)
 
     def test_api_missing_non_optional_param(self):