diff --git a/pay/example/integration_test/payment_flow_test.dart b/pay/example/integration_test/payment_flow_test.dart
index 0a2c1a3b..974606b1 100644
--- a/pay/example/integration_test/payment_flow_test.dart
+++ b/pay/example/integration_test/payment_flow_test.dart
@@ -19,7 +19,7 @@ import 'package:pay/pay.dart';
 void main() {
   IntegrationTestWidgetsFlutterBinding.ensureInitialized();
 
-  testWidgets("correctly creates an instance of the client", (_) async {
+  testWidgets("correctly creates an instance of the client", (WidgetTester tester) async {
     Pay client = Pay({});
     await expectLater(client, isNotNull);
   });
diff --git a/pay/example/lib/advanced.dart b/pay/example/lib/advanced.dart
index 8a6e0d88..64c68589 100644
--- a/pay/example/lib/advanced.dart
+++ b/pay/example/lib/advanced.dart
@@ -26,7 +26,7 @@ void main() {
   runApp(const PayAdvancedMaterialApp());
 }
 
-const googlePayEventChannelName = 'plugins.flutter.io/pay/payment_result';
+const kGooglePayEventChannelName = 'plugins.flutter.io/pay/payment_result';
 const _paymentItems = [
   PaymentItem(
     label: 'Total',
@@ -70,7 +70,7 @@ class PayAdvancedSampleApp extends StatefulWidget {
 }
 
 class _PayAdvancedSampleAppState extends State<PayAdvancedSampleApp> {
-  static const eventChannel = EventChannel(googlePayEventChannelName);
+  static const eventChannel = EventChannel(kGooglePayEventChannelName);
   StreamSubscription<String>? _googlePayResultSubscription;
 
   late final Future<bool> _canPayGoogleFuture;
diff --git a/pay_platform_interface/lib/core/payment_configuration.dart b/pay_platform_interface/lib/core/payment_configuration.dart
index ff87916f..887dacd5 100644
--- a/pay_platform_interface/lib/core/payment_configuration.dart
+++ b/pay_platform_interface/lib/core/payment_configuration.dart
@@ -19,6 +19,7 @@ import 'package:flutter/services.dart';
 import '../util/configurations.dart';
 
 /// The payment providers supported by this package.
+// ignore: constant_identifier_names
 enum PayProvider { apple_pay, google_pay }
 
 /// A type used to define the signature of methods and objects used to load
diff --git a/pay_platform_interface/lib/core/payment_item.dart b/pay_platform_interface/lib/core/payment_item.dart
index bdfdca92..79e0bb0a 100644
--- a/pay_platform_interface/lib/core/payment_item.dart
+++ b/pay_platform_interface/lib/core/payment_item.dart
@@ -19,6 +19,7 @@
 /// * [pending] expects changes to the final price in response to user selection
 /// or other circumstances that are not known when first requesting the payment.
 /// * [unknown] for any other scenario.
+// ignore: constant_identifier_names
 enum PaymentItemStatus { unknown, pending, final_price }
 
 /// A set of utility methods associated to the [PaymentItemStatus] enumeration.