diff --git a/lib/src/utils/confirmations/transaction_event.dart b/lib/src/utils/confirmations/transaction_event.dart
index 2999ad09..d2528600 100644
--- a/lib/src/utils/confirmations/transaction_event.dart
+++ b/lib/src/utils/confirmations/transaction_event.dart
@@ -76,7 +76,7 @@ class TransactionConfirmation with _$TransactionConfirmation {
   bool get isEnoughConfirmed => isEnoughConfirmations(
         nbConfirmations,
         maxConfirmations,
-        ratio,
+        0.5,
         ratioEqualIncluded: ratioEqualIncluded,
       );
 
diff --git a/test/api_test.dart b/test/api_test.dart
index af76c1a7..94afea56 100644
--- a/test/api_test.dart
+++ b/test/api_test.dart
@@ -1,5 +1,3 @@
-library test.api_test;
-
 import 'dart:developer';
 
 import 'package:archethic_lib_dart/archethic_lib_dart.dart';
@@ -584,7 +582,7 @@ void main() {
 
       test('callSCFunctionError', () async {
         try {
-          await ApiService('http://127.0.0.1:4000').callSCFunction(
+          await ApiService('https://testnet.archethic.net').callSCFunction(
             jsonRPCRequest: SCCallFunctionRequest(
               method: 'contract_fun',
               params: SCCallFunctionParams(
@@ -601,13 +599,14 @@ void main() {
               ),
             ),
           );
+          fail('Should send an ArchethicJsonRPCException with code 252');
         } catch (e) {
-          if (e is ArchethicJsonRPCException) {
-            expect(
-              e.code,
-              252,
-            );
-          }
+          expect(e, isA<ArchethicJsonRPCException>());
+          e as ArchethicJsonRPCException;
+          expect(
+            e.code,
+            252,
+          );
         }
       });
     },