diff --git a/tests/Feature/Banking/TransactionsTest.php b/tests/Feature/Banking/TransactionsTest.php
index b6bab4b90..6580ccf86 100644
--- a/tests/Feature/Banking/TransactionsTest.php
+++ b/tests/Feature/Banking/TransactionsTest.php
@@ -240,7 +240,7 @@ class TransactionsTest extends FeatureTestCase
 
         return [
             'transaction_id'    => $transaction->id,
-            'to'                => $transaction->contact->email,
+            'to'                => [$transaction->contact->email],
             'subject'           => $notification->getSubject(),
             'body'              => $notification->getBody(),
         ];
diff --git a/tests/Feature/Sales/InvoicesTest.php b/tests/Feature/Sales/InvoicesTest.php
index 3aad6da17..430d2e808 100644
--- a/tests/Feature/Sales/InvoicesTest.php
+++ b/tests/Feature/Sales/InvoicesTest.php
@@ -300,7 +300,7 @@ class InvoicesTest extends FeatureTestCase
 
         return [
             'document_id'   => $invoice->id,
-            'to'            => $invoice->contact->email,
+            'to'            => [$invoice->contact->email],
             'subject'       => $notification->getSubject(),
             'body'          => $notification->getBody(),
         ];