diff --git a/src/Testing/Doubles/FakePayment.php b/src/Testing/Doubles/FakePayment.php
index 84470dd..5a011bd 100644
--- a/src/Testing/Doubles/FakePayment.php
+++ b/src/Testing/Doubles/FakePayment.php
@@ -59,7 +59,7 @@ public function withStatus(string $status = ''): self
 
     public function withRefunds(FakeRefund ...$refunds): self
     {
-        $refunds ??= [FakeRefund::fake($this->container)];
+        $refunds = $refunds ?: [FakeRefund::fake($this->container)];
 
         $this->refunds = array_merge($this->refunds, $refunds);