diff --git a/km3buu/tests/test_output.py b/km3buu/tests/test_output.py
index b383db705e7a6f35761a2120075ac7478c9c86f1..963b229973b12e033e22a24069528ddf22414a92 100644
--- a/km3buu/tests/test_output.py
+++ b/km3buu/tests/test_output.py
@@ -95,7 +95,7 @@ class TestAANET(unittest.TestCase):
 
     def test_firstevent(self):
         evt = self.fobj.events[0]
-        np.testing.assert_array_equal(evt.mc_tracks.type,
+        np.testing.assert_array_equal(evt.mc_tracks.pdgid,
                                       [12, 2212, 111, 211, -211])
         np.testing.assert_array_almost_equal(
             evt.mc_tracks.E,