diff --git a/tests/pico-fido/test_020_register.py b/tests/pico-fido/test_020_register.py
index bbb2dd1..78377d8 100644
--- a/tests/pico-fido/test_020_register.py
+++ b/tests/pico-fido/test_020_register.py
@@ -20,6 +20,8 @@
 
 from fido2.client import CtapError
 from fido2.cose import ES256, ES384, ES512
+import fido2.features
+fido2.features.webauthn_json_mapping.enabled = False
 from utils import ES256K
 import pytest
 
diff --git a/tests/pico-fido/test_035_hmac_secret.py b/tests/pico-fido/test_035_hmac_secret.py
index 8a2d619..ed2861c 100644
--- a/tests/pico-fido/test_035_hmac_secret.py
+++ b/tests/pico-fido/test_035_hmac_secret.py
@@ -69,12 +69,12 @@ def test_hmac_secret_entropy(device, MCHmacSecret, hmac, salts
 
     #print(shannon_entropy(auth.authenticator_data.extensions['hmac-secret']))
     if len(salts) == 1:
-        assert shannon_entropy(auth.authenticator_data.extensions['hmac-secret']) > 4.6
-        assert shannon_entropy(ext["hmacGetSecret"]['output1']) > 4.6
+        assert shannon_entropy(auth.authenticator_data.extensions['hmac-secret']) > 4.5
+        assert shannon_entropy(ext["hmacGetSecret"]['output1']) > 4.5
     if len(salts) == 2:
         assert shannon_entropy(auth.authenticator_data.extensions['hmac-secret']) > 5.4
-        assert shannon_entropy(ext["hmacGetSecret"]['output1']) > 4.6
-        assert shannon_entropy(ext["hmacGetSecret"]['output2']) > 4.6
+        assert shannon_entropy(ext["hmacGetSecret"]['output1']) > 4.5
+        assert shannon_entropy(ext["hmacGetSecret"]['output2']) > 4.5
 
 def get_output(device, MCHmacSecret, hmac, salts):
     hout = {'salt1':salts[0]}