diff --git a/tests/icosagon/test_model.py b/tests/icosagon/test_model.py
index 5ee16ef..c1ad0b6 100644
--- a/tests/icosagon/test_model.py
+++ b/tests/icosagon/test_model.py
@@ -86,3 +86,19 @@ def test_model_03():
     assert len(list(m.seq[2].parameters())) == 1
     assert len(list(m.seq[3].parameters())) == 2
     # print(list(m.seq[1].parameters()))
+
+
+def test_model_04():
+    d = Data()
+    d.add_node_type('Dummy', 10)
+    fam = d.add_relation_family('Dummy-Dummy', 0, 0, False)
+    mat = torch.rand(10, 10).round().to_sparse()
+    fam.add_relation_type('Dummy Rel 1', mat)
+    fam.add_relation_type('Dummy Rel 2', mat.clone())
+
+    m = Model(d, ratios=TrainValTest(1., 0., 0.))
+
+    assert len(list(m.seq[0].parameters())) == 1
+    assert len(list(m.seq[1].parameters())) == 2
+    assert len(list(m.seq[2].parameters())) == 2
+    assert len(list(m.seq[3].parameters())) == 3