diff --git a/tests/icosagon/test_decode.py b/tests/icosagon/test_decode.py
index 96ca3d7..b8c9cea 100644
--- a/tests/icosagon/test_decode.py
+++ b/tests/icosagon/test_decode.py
@@ -210,3 +210,31 @@ def test_empty_inner_product_decoder_01():
 
     for i in range(len(res)):
         assert res[i].shape == (0,)
+
+
+def test_dedicom_decoder_parameter_count_01():
+    dec = DEDICOMDecoder(32, 7, keep_prob=1.,
+        activation=torch.sigmoid)
+
+    assert len(list(dec.parameters())) == 8
+
+
+def test_dist_mult_decoder_parameter_count_01():
+    dec = DistMultDecoder(32, 7, keep_prob=1.,
+        activation=torch.sigmoid)
+
+    assert len(list(dec.parameters())) == 7
+
+
+def test_bilinear_decoder_parameter_count_01():
+    dec = BilinearDecoder(32, 7, keep_prob=1.,
+        activation=torch.sigmoid)
+
+    assert len(list(dec.parameters())) == 7
+
+
+def test_inner_product_decoder_parameter_count_01():
+    dec = InnerProductDecoder(32, 7, keep_prob=1.,
+        activation=torch.sigmoid)
+
+    assert len(list(dec.parameters())) == 0