diff --git a/lib/screens/wallet/wallet_sign_transaction.dart b/lib/screens/wallet/wallet_sign_transaction.dart
index 013cad21..4b748f9c 100644
--- a/lib/screens/wallet/wallet_sign_transaction.dart
+++ b/lib/screens/wallet/wallet_sign_transaction.dart
@@ -431,6 +431,7 @@ class _WalletSignTransactionScreenState
                           ? Padding(
                               padding: const EdgeInsets.symmetric(vertical: 10),
                               child: Text(
+                                key: const Key('signingError'),
                                 AppLocalizations.instance.translate(
                                   'sign_transaction_signing_failed',
                                 ),
diff --git a/test_driver/key_new.dart b/test_driver/key_new.dart
index abc6841e..af47caee 100644
--- a/test_driver/key_new.dart
+++ b/test_driver/key_new.dart
@@ -125,7 +125,7 @@ void main() {
         await driver.waitFor(find.text('mm5pM9sJzVjsafctQJJrJuhGsw1CTucZ2v'));
       });
 
-      test('Transaction signing', () async {
+      test('Transaction signing, success', () async {
         await driver.tap(find.byTooltip('Transactions'));
         await driver.tap(find.byTooltip('Show menu'));
         await driver.runUnsynchronized(
@@ -150,6 +150,28 @@ void main() {
         );
       });
 
+      test('Transaction signing, fail', () async {
+        await driver.tap(find.pageBack());
+        await driver.tap(find.byTooltip('Transactions'));
+        await driver.tap(find.byTooltip('Show menu'));
+        await driver.runUnsynchronized(
+          () async {
+            await driver.tap(find.text('Sign Transaction'));
+          },
+        );
+        await driver.tap(find.text('Select'));
+        await driver.tap(find.text('mm5pM9sJzVjsafctQJJrJuhGsw1CTucZ2v'));
+        await driver.tap(find.pageBack());
+        await driver.tap(find.byValueKey('transactionHexInput'));
+        await driver.enterText(
+          'xxx',
+        );
+        await driver.tap(find.text('Sign'));
+        await driver.waitFor(
+          find.byValueKey('signingError'),
+        );
+      });
+
       test('Change wallet title', () async {
         await driver.tap(find.pageBack());
         await driver.tap(find.byTooltip('Transactions'));