diff --git a/test/test_mnn.py b/test/test_mnn.py
index 053a0e3..46bb997 100644
--- a/test/test_mnn.py
+++ b/test/test_mnn.py
@@ -147,7 +147,7 @@ def test_mnn_graph_matrix_gamma():
     assert np.all(G.d == G2.d), "{} ({}, {})".format(
         np.where(G.d != G2.d),
         G.d[np.argwhere(G.d != G2.d).reshape(-1)],
-        G.d2[np.argwhere(G.d != G2.d).reshape(-1)])
+        G.d[np.argwhere(G.d != G2.d).reshape(-1)])
     assert (G.W != G2.W).nnz == 0
     assert (G2.W != G.W).sum() == 0
     assert isinstance(G2, graphtools.graphs.MNNGraph)