diff --git a/tests/pico-fido/test_020_register.py b/tests/pico-fido/test_020_register.py
index 3a80e7d..bbb2dd1 100644
--- a/tests/pico-fido/test_020_register.py
+++ b/tests/pico-fido/test_020_register.py
@@ -147,6 +147,8 @@ def test_bad_type_pubKeyCredParams_alg(device):
     with pytest.raises(CtapError) as e:
         device.doMC(key_params=[{"alg": "7", "type": "public-key"}])
 
+    assert e.value.code == CtapError.ERR.CBOR_UNEXPECTED_TYPE
+
 def test_unsupported_algorithm(device):
     with pytest.raises(CtapError) as e:
         device.doMC(key_params=[{"alg": 1337, "type": "public-key"}])