diff --git a/astroquery/besancon/tests/test_besancon.py b/astroquery/besancon/tests/test_besancon.py
index eb2a03e525..2ed77135b7 100644
--- a/astroquery/besancon/tests/test_besancon.py
+++ b/astroquery/besancon/tests/test_besancon.py
@@ -105,6 +105,6 @@ def test_default_params():
 class MockResponseBesancon(MockResponse):
 
     def __init__(self, content=None, url=None, headers={}, **kwargs):
-        super().__init__(content)
+        super().__init__(content=content)
         self.raw = url  # StringIO.StringIO(url)
         self.headers = headers