diff --git a/tools/testing/tests/fido2.py b/tools/testing/tests/fido2.py
index 7bacaed..339826a 100644
--- a/tools/testing/tests/fido2.py
+++ b/tools/testing/tests/fido2.py
@@ -211,7 +211,7 @@ class FIDO2Tests(Tester):
             assert "hmac-secret" in reg.auth_data.extensions
             assert reg.auth_data.extensions["hmac-secret"] == True
 
-        reg = self.testMC(
+        self.testMC(
             "Send MC with fake extension set to true, expect SUCCESS",
             cdh,
             rp,
@@ -278,6 +278,10 @@ class FIDO2Tests(Tester):
                     assert shannon_entropy(ext["hmac-secret"]) > 5.4
                     assert shannon_entropy(key) > 5.4
 
+            with Test("Check that the assertion is valid"):
+                credential_data = AttestedCredentialData(reg.auth_data.credential_data)
+                auth.verify(cdh, credential_data.public_key)
+
         salt_enc, salt_auth = get_salt_params((salt3,))
 
         auth = self.testGA(
diff --git a/tools/testing/tests/tester.py b/tools/testing/tests/tester.py
index 129022c..764bcca 100644
--- a/tools/testing/tests/tester.py
+++ b/tools/testing/tests/tester.py
@@ -206,7 +206,6 @@ class Tester:
             self.ctap.make_credential, test, *args, **kwargs
         )
         if attestation_object:
-            print(attestation_object)
             verifier = Attestation.for_type(attestation_object.fmt)
             client_data = args[0]
             verifier().verify(