diff --git a/tests/icosagon/test_model.py b/tests/icosagon/test_model.py
index 5c122d9..5e5d482 100644
--- a/tests/icosagon/test_model.py
+++ b/tests/icosagon/test_model.py
@@ -180,3 +180,25 @@ def test_model_07():
 
     with pytest.raises(TypeError):
         m = Model(prep_d, dec_activation='x')
+
+
+def test_model_08():
+    d = Data()
+    d.add_node_type('Dummy', 10)
+    d.add_node_type('Foobar', 20)
+
+    fam = d.add_relation_family('Dummy-Foobar', 0, 1, True)
+    mat = torch.rand(10, 20).round().to_sparse()
+    fam.add_relation_type('Dummy Rel 1', mat)
+    fam.add_relation_type('Dummy Rel 2', mat.clone())
+
+    fam = d.add_relation_family('Dummy-Dummy 2', 0, 0, False)
+    mat = torch.rand(10, 10).round().to_sparse()
+    fam.add_relation_type('Dummy Rel 2-1', mat)
+    fam.add_relation_type('Dummy Rel 2-2', mat.clone())
+
+    prep_d = prepare_training(d, TrainValTest(1., 0., 0.))
+
+    m = Model(prep_d)
+
+    assert len(list(m.parameters())) == 20